先進の入力および負荷保護機能を備えた38V

LTM4641
先進の入力および
負荷保護機能を備えた38V、
10A DC/DC µModuleレギュレータ
特長
4.5V
10ADC
12A
0.6V 6V
DC 1.5%
n
n
n
n
n
概要
38V
LTM®4641
DC/DC µModule®
POL
n
n
IC
/
n
IC
n
n
n
n
n
n
n
n
n
n
選択可能なパルス・スキップ動作
ソフトスタート/ 電圧トラッキング /プリバイアスでの起動
15mm×15mm×5.01mm BGA パッケージ
SnPb 仕上げまたはRoHS 準拠の仕上げ
4V
0.6V
UVLO、過電圧シャットダウン、ラッチオフの検出しきい値
過電圧時に電源を遮断するNチャネル MOSFETドライバ
数個の外付け部品で機能するサージ・ストッパ
n
4.5V
6V
38V
LTM4641
10A
堅牢でリセット可能なラッチオフ過電圧保護
過電圧クローバ式 Nチャネルパワー MOSFETドライバ
LTM4641
アプリケーション
n
MOSFET
15mm15mm5.01mm
SnPb
RoHS
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6580258、6677210、8163643を含む米国特許によって保護されています。
高耐久化電子機器
航空電子工学機器および産業用機器
標準的応用例
µModule
4
VIN
4V TO 38V
4.5V START-UP
+
VIN
MSP*
10µF
50V
×2
100µF
50V
3
VING VINGP VINH MTOP
VOUT
750k
fSET
UVLO
INTVCC
DRVCC
RUN
TRACK/SS
MBOT
VOSNS+
LTM4641
VOSNS–
VOUT
1V
100µF 10A
×3
2
MCB**
CROWBAR
OVPGM
3
2
CROWBAR (5V/DIV)
1.1VOUT PEAK
LOAD
VOUT
(200mV/DIV)
GND
IOVRETRY OVLO FCB LATCH SGND
4
VINL, VINH (25V/DIV)
5.49k
5.49k
MTOP
1V
SHORT-CIRCUIT APPLIED
1
SW
VINL
10nF
38V
1
4641 TA01a
5.6M
SGND CONNECTS TO GND INTERNAL TO µMODULE REGULATOR
* MSP: (OPTIONAL) SERIES-PASS OVERVOLTAGE POWER INTERRUPT MOSFET, NXP PSMN014-60LS
** MCB: (OPTIONAL) OUTPUT OVERVOLTAGE CROWBAR MOSFET, NXP PH2625L
4µs/DIV
TESTED AT WORST-CASE CONDITION: NO LOAD
4641 TA01b
4641fe
詳細：www.linear-tech.co.jp/LTM4641
1
LTM4641
目次
....................................................................1
...................................................1
.......................................................
1
....................................................................1
........................................................3
..............................................................3
..............................................................3
...........................................................4
.....................................................8
............................................................ 10
.................................................... 15
........................................... 15
.................................................................. 16
はじめに ........................................................................... 16
目的 ................................................................................... 16
パワーµModuleレギュレータの信頼性 ........................... 16
概要 ................................................................................... 16
............................
17
パワー段（VINH）およびバイアス（VINL）入力ピン ..........17
スイッチング周波数（オン時間）の選択と
電圧ドロップアウトの基準
（達成可能なVIN対VOUTの降圧比） ...............................18
出力電圧の設定：差動遠隔検出アンプ ......................... 21
入力コンデンサ................................................................ 23
出力コンデンサとループの安定性/ループ補償.............. 23
パルス・スキップ・モードと強制連続モード .................. 24
ソフトスタート、レール・トラッキング、
およびプリバイアス状態での起動 ................................. 24
INTVCCとDRVCC................................................................. 27
1VREF ................................................................................. 28
TEMP、OTBH、および過熱保護........................................ 28
入力モニタ・ピン：UVLO、IOVRETRY、OVLO................... 29
.......................
29
起動/シャットダウンとRUNイネーブル、パワーオン・
リセット時間とタイムアウト遅延時間 ........................... 31
....................... 32
過電流フォールドバックによる保護 ............................... 32
パワーグッド・インジケータと
ラッチ式出力過電圧保護................................................ 32
電源遮断MOSFET（MSP）、CROWBARピンおよび
出力クローバMOSFET（MCB）......................................... 33
高速出力過電圧コンパレータのしきい値 ...................... 34
スイッチング・ノード：SWピン ......................................... 35
EMI ..............................
35
............................................................ 36
.............. 38
熱に関する検討事項および出力電流の
ディレーティング ............................................................. 38
.......................
45
........................................
46
安全性に関する検討事項 ............................................... 46
レイアウトのチェックリスト/例 ...................................... 46
......................................................
48
.................................................................. 56
付録A．機能ブロック図と特長の
クイック・リファレンス・ガイド ........................................ 56
付録B．起動/シャットダウン時の状態図 ....................... 57
付録C．スイッチング周波数に関する
検討事項とRfSETの使用................................................... 58
付録D．厳しい環境での遠隔検出 .................................. 59
付録E．パルス・スキップ・モード動作の発想 ................. 60
付録F．高速出力過電圧コンパレータ
しきい値の調整 ................................................................ 60
......................................................... 63
................................................ 63
......................................................... 64
............................................................ 65
......................................................
66
............................................................ 66
4641fe
2
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
絶対最大定格Note 1
ピン配置
端子電圧
VINL、VINH、SW、fSET ..........................................–0.3V ～ 40V
VOUT ..................................................................–0.3V ～ 9.2V
VING ........................................................ –0.3V ～ VINH ＋20V
INTVCC、DRVCC、RUN、TRACK/SS、PGOOD、
CROWBAR、HYST ................................................–0.3V ～ 6V
FCB、TMR ......................................... –0.3V ～ INTVCC ＋0.3V
COMP ................................................................–0.3V ～ 2.7V
VOSNS+、VORB+ ...................................................–0.6V ～ 9.7V
VOSNS–、VORB– .......................VOSNS+ − 2.7V ～ VOSNS+ ＋0.3V
OTBH、UVLO、IOVRETRY、OVLO、LATCH.........–0.3V ～ 7.5V
TEMP、OVPGM ...................................................–0.3V ～ 1.5V
端子電流
INTVCC
（連続）............................................................ –30mA
INTVCC
（連続、CROWBARピンからの
ソース電流が 15mAのとき）...................................... –15mA
CROWBAR（連続）...................................................... –15mA
VINGP
（連続）.................................................–50mA ～ 15mA
1VREF
（連続）.....................................................–1mA ～ 1mA
内部動作温度範囲（Note 2）
Eおよび Iグレード......................................... –40°C ～ 125°C
MPグレード .................................................. –55°C ～ 125°C
保存温度範囲.................................................... –55°C ～ 125°C
ピーク・パッケージ・ボディ温度（SMTリフロー時）........245°C
INTVCC
SGND
M
TRACK/SS
PGOOD L
SGND
K
COMP
J
fSET
VINL H
VOSNS+
VOSNS– G
VORB–
VING VINGP
VINH
FCB
DRVCC
GND
SW
GND
GND
F
VORB+
TOP VIEW
E
OTBH TMR RUN
D
VOUT
LATCH
C
SGND
B
1VREF
GND
A
1
2
3
UVLO
HYST
4
5
TEMP
6
7
8
9 10 11
IOVRETRY CROWBAR OVPGM
OVLO
12
BGA PACKAGE
144-LEAD (15mm × 15mm × 5.01mm)
TJMAX = 125°C, θJCtop = 11°C/W, θJCbottom = 2.5°C/W
θJB = 3°C/W, θJA = 10.4°C/W
θ VALUES DETERMINED PER JESD51-12
WEIGHT = 2.9 GRAMS
発注情報
/
LTM4641EY#PBF
SAC305 (RoHS)
*
LTM4641Y
MSL
e1
BGA
4
Note 2
–40°C to 125°C
LTM4641IY#PBF
SAC305 (RoHS)
LTM4641Y
e1
BGA
4
–40°C to 125°C
LTM4641IY
SnPb (63/37)
LTM4641Y
e0
BGA
4
–40°C to 125°C
LTM4641MPY#PBF
SAC305 (RoHS)
LTM4641Y
e1
BGA
4
–55°C to 125°C
LTM4641MPY
SnPb (63/37)
LTM4641Y
e0
BGA
4
–55°C to 125°C
さらに広い動作温度範囲で規定されるデバイスについては、弊社または弊社代理店にお問い
合わせください。* 温度グレードは出荷時のコンテナのラベルで識別されます。パッド/ ボール
仕上げのコードは、IPC/JEDEC J-STD-609による。
• 無鉛仕上げおよび非無鉛仕上げの製品マーキング：
www.linear-tech.co.jp/leadfree
• 推奨されるLGA/BGAのPCBアセンブリおよび製造方法：
www.linear-tech.co.jp/umodule/pcbassembly
• LGA/BGA パッケージおよびトレイ図面：
www.linear-tech.co.jp/packaging
4641fe
詳細：www.linear-tech.co.jp/LTM4641
3
LTM4641
電気的特性
TA
l
VIN
VINH
VINL
28V
SYMBOL
PARAMETER
VIN
Input DC Voltage
VOUT
Output Voltage Range
VOUT(DC)
45
25C
Note 2
CONDITIONS
MIN
TYP
MAX
UNITS
l
4.5
38
V
Use RSET1A = RSET1B ≤ 8.2kΩ.RfSET Values
Recommended in Table 1
l
0.6
6
V
Output Voltage, Total Variation with
Line and Load, and Prior to UVLO
4.5V ≤ VIN ≤ 38V, 0A ≤ IOUT ≤ 10A
VIN = 4V (Ramped Down from 4.5V), IOUT = 0A
l
l
1.773
1.773
1.800
1.800
1.827
1.827
V
V
VRUN(ON,OFF)
RUN On/Off Threshold
Run Rising, Turn On
Run Falling, Turn Off
l
l
0.8
1.25
1.15
2
V
V
IRUN(ON)
RUN Pull-Up Current
VRUN = 0V
VRUN = 3.3V
l
l
–580
–220
–520
–165
–460
–110
µA
µA
IRUN(OFF)
RUN Pull-Down Current, Switching
Inhibited
VRUN = 3.3V, UVLO = 0V (MHYST On)
VINL(UVLO)
VINL Undervoltage Lockout
VINL Rising
VINL Falling
Hysteresis
IINRUSH(VINH)
Input Inrush Current Through VINH, at
Start-Up
CSS = Open
IQ(VINH)
Power Stage Bias Current (IVINH) at No IOUT = 0A and:
Load
FCB ≥ 0.84V (Pulse-Skipping Mode)
FCB ≤ 0.76V (Forced Continuous Mode)
Shutdown, RUN = 0
IQ(VINL)
Control Bias Current (IVINL)
IS(VINH)
1
l
l
l
3.5
300
4.2
3.8
400
nA
4.5
4
V
V
mV
230
mA
8
29
0.2
mA
mA
mA
INTVCC Connected to DRVCC and:
VIN = 28V, IOUT = 0A
VIN = 28V, IOUT = 10A
VIN = 28V, Shutdown, RUN = 0
14.5
15.5
5
mA
mA
mA
Power Stage Input Current (IVINH) at
Full Load
IOUT = 10A and:
VIN = 4.5V
VIN = 28V
VIN = 38V
4.65
790
590
A
mA
mA
IOUT(DC)
Output Continuous Current Range
(Note 3)
l
10
A
∆VOUT(LINE)/VOUT
Line Regulation Accuracy
VIN from 4.5V to 38V, IOUT = 0A
l
0.02
0.15
%
∆VOUT(LOAD)/VOUT
Load Regulation Accuracy
IOUT from 0A to 10A (Note 3)
l
0.04
0.15
%
VOUT(AC)
Output Voltage Ripple Amplitude
IOUT = 0A
16
mVP-P
fS
Output Voltage Ripple Frequency
IOUT = 0A
IOUT = 10A
290
330
kHz
kHz
VOUT(START)
Turn-On Overshoot
IOUT = 0A
10
mV
tSTART
VIN-to-VOUT Start-Up Time
RUN Electrically Open Circuit, Time Between
Application of VIN to VOUT Becoming Regulated,
OVPGM = 1.5V, CTMR = CSS = Open
3
ms
tRUN(ON-DELAY)
RUN-to-VOUT Turn-On Response Time
VIN Established, (TMR-Set POR Time Expired)Time
Between RUN Releasing from GND to PGOOD Going
Logic High, CSS = Open,
OVPGM = 1.5V
175
∆VOUT(LS)
Peak Deviation for Dynamic Load Step
IOUT from 0A to 5A at 5A/µs
IOUT from 5A to 0A at 5A/µs
40
40
mV
mV
tSETTLE(LS)
Settling Time for Dynamic Load Step
IOUT from 0A to 5A at 5A/µs
IOUT from 5A to 0A at 5A/µs
20
20
μs
µs
0
400
μs
4641fe
4
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
電気的特性
TA
l
VIN
VINH
VINL
28V
45
25C
Note 2
SYMBOL
PARAMETER
CONDITIONS
IOUT(PK)
Output Current Limit
5.1kΩ Pull-Up from PGOOD to 5V Source, IOUT
Ramped Up Until VOUT Below PGOOD Lower
Threshold, PGOOD Pulls Logic Low
MIN
24
A
IVINH(IOUT_SHORT)
Power Stage Input Current During
Output Short Circuit
VOUT Electrically Shorted to GND
45
mA
VFB
Differential Feedback Voltage from
VOSNS+ to VOSNS–
IOUT = 0A
ITRACK/SS
TRACK/SS Pull-Up Current
VTRACK/SS = 0V
VFCB
FCB Threshold
IFCB
FCB Pin Current
VFCB = 0.8V
tON(MIN)
Minimum On-Time
(Note 4)
tOFF(MIN)
Minimum Off-Time
(Note 4)
l
+
TYP
MAX
609
UNITS
591
600
mV
–0.45
–1
0.76
0.8
0.84
V
0
±1
μA
43
75
ns
220
300
ns
2.7
V
3
V
V
μA
VOSNS(DM)
Remote Sense Pin-Pair Differential
Mode Input Range
–
l
0
VOSNS(CM)
Remote Sense Pin-Pair Common Mode Valid VOSNS– Common Mode Range
Input Range
Valid VOSNS+ Common Mode Range
(Use RSET1A = RSET1B ≤ 8.2k)
l
l
–0.3
RIN(VOSNS+)
Input Resistance
VOSNS+ to GND
VINTVCC
Internal VCC Voltage
6V ≤ VIN ≤ 38V, INTVCC Not Connected to DRVCC,
DRVCC = 5.3V
∆VINTVCC(LOAD)
VINTVCC
INTVCC Load Regulation
RUN = 0V, INTVCC Not Connected to DRVCC,
DRVCC = 5.3V and:
IINTVCC Varied from 0mA to –20mA
IINTVCC Varied from 0mA to –30mA
VINTVCC(LOWLINE)
INTVCC Voltage at Low Line
VIN = 4.5V, RSET1A = RSET1B = 0Ω (~0.6VOUT,
RfSET Value Recommended in Table 1)
l
4.2
4.3
DRVCC(UVLO)
DRVCC Undervoltage Lockout
DRVCC Rising
DRVCC Falling
l
l
3.9
3.2
4.05
3.35
4.2
3.5
V
V
IDRVCC
DRVCC Current
INTVCC Not Connected to DRVCC, DRVCC = 5.3V,
RSET1A, RSET1B and RSET2 Setting VOUT to:
1.8VOUT, RfSET = 2MΩ, 0A ≤ IOUT ≤ 10A
6.0VOUT, RfSET = Open, 0A ≤ IOUT ≤ 10A
(Use RSET1A = RSET1B ≤ 8.2k)
11
20
18
27
mA
mA
0.985
0.980
1.000
1.000
1.015
1.020
533
645
621
525
556
660
644
540
579
675
667
555
mV
mV
mV
mV
8
16
24
mV
75
400
mV
Valid Differential VOSNS -to- VOSNS Range
(Use RSET1A = RSET1B ≤ 8.2k)
16318
16400
16482
Ω
5.1
5.3
5.4
V
–0.7
–1
±2
±3
%
%
INTVCC DRVCC 1VREF
1VREF DC Voltage Regulation
I1VREF = 0mA
I1VREF = ±1mA
VPGOOD(TH)
Power Good Window, Logic State
Transition Thresholds
Ramping Differential VOSNS+ – VOSNS– Voltage:
Up, PGOOD Goes Logic Low → High
Up, PGOOD Goes Logic High → Low
Down, PGOOD Goes Logic Low → High
Down, PGOOD Goes Logic High → Low
VPGOOD(HYST)
Hysteresis
Differential VOSNS+ – VOSNS– Voltage Returning
VPGOOD(VOL)
Logic-Low Output Voltage
IPGOOD = 5mA
V1VREF(DC)
l
l
l
V
V
V
PGOOD
tPGOOD(DELAY)
PGOOD Logic-Low Blanking Time
l
+
–
Delay Between Differential VOSNS – VOSNS Voltage
Exiting PGOOD Valid Window to PGOOD Going
Logic Low (Note 4)
12
μs
4641fe
詳細：www.linear-tech.co.jp/LTM4641
5
LTM4641
電気的特性
TA
l
VIN
SYMBOL
VIN
VINL
28V
45
PARAMETER
25C
Note 2
CONDITIONS
MIN
TYP
MAX
UNITS
l
l
l
l
11.5
35
45
10.5
13.3
38.4
48.4
11.5
15.5
41
51.5
14.2
V
V
V
V
MOSFET
VVING
Gate Drive Voltage for PowerInterrupt MOSFET, MSP
VIN = 4.5V, 0A ≤ IOUT ≤ 10A, VING Sourcing 1µA
VIN = 28V, 0A ≤ IOUT ≤ 10A, VING Sourcing 1µA
VIN = 38V, 0A ≤ IOUT ≤ 10A, VING Sourcing 1µA
VIN = 4V (Ramped Down from 4.5V), IOUT = 0A,
VING Sourcing 1µA
IVING(UP)
VING Pull-Up Current
VING Tied to VINGP, and:
VIN = 4.5V, VING Pulled to 6.5V
VIN = 28V, VING Pulled to 30V
l
l
350
425
475
550
600
675
µA
µA
VING Tied to VINGP, Pulled to 33V, and:
RUN Pulled to 0V (CROWBAR Inactive)
OVPGM Pulled to 0V (CROWBAR Active)
l
l
3
24
20
27
30
30
mA
mA
1.3
2.6
µs
IVING_DOWN(CROWBAR
VING Pull-Down Current
ACTIVE,CROWBAR
INACTIVE)
tVING(OVP_DELAY)
VING OVP Pull-Down Delay
OVPGM Driven from 650mV to 550mV, VING
Discharge Response Time
IVINGP(LEAK)
Zener Diode Leakage Current
VINGP Driven to (VINH + 10V)
1
nA
VINGP(CLAMP)
Zener Diode Breakdown Voltage
VINGP-to-VINH Differential Voltage; IVINGP = 5mA
15
V
VOVPGM
Default Output Overvoltage Program
Setting
OVPGM Electrically Open Circuit
l
650
666
680
mV
IOVPGM(UP)
OVPGM Pull-Up Current
OVPGM = 0V
l
–2.07
–2
–1.91
μA
IOVPGM(DOWN)
OVPGM Pull-Down Current
OVPGM = 1V
l
0.945
1
1.06
μA
647
666
683
mV
–12
0
12
mV
400
500
ns
4.65
4.55
5
4.9
V
V
+
–
l
OVPTH
Output Overvoltage Protection
Inception Threshold
Ramping Up Differential VOSNS -to-VOSNS
Voltage Until CROWBAR Outputs Logic High
l
OVPERR
Output Overvoltage Protection
Inception Error
Difference Between OVPTH and VOVPGM
(OVPTH-VOVPGM)
l
tCROWBAR(OVP_DELAY)
CROWBAR Response Time
OVPGM Driven from 650mV to 550mV
l
VCROWBAR(OH)
CROWBAR Output, Active High
Voltage
OVPGM Pulled to 0V and:
ICROWBAR = –100μA, IINTVCC = –20mA
ICROWBAR = –4mA, IINTVCC = –20mA
l
l
VCROWBAR(OL)
CROWBAR Output, Passive Low
Voltage
ICROWBAR = 1μA
l
260
500
mV
VCROWBAR(OVERSHOOT)
CROWBAR Peak Voltage Overshoot
at VINL Start-Up and Shutdown
VINL Ramped Up from/Down to 0V
l
550
900
mV
VCROWBAR(TH)
CROWBAR Latchoff Threshold
CROWBAR Ramped Up Until HYST Goes Logic Low
l
1.4
1.5
1.6
V
VTEMP
TEMP Voltage
RUN = 0V, TA = 25°C
RUN = 0V, TA = 125°C
(See Figure 10 for Reference)
950
980
585
1010
mV
mV
OTTH(INCEPTION)
TEMP Overtemperature Inception
Threshold
Ramping TEMP Downward Until HYST Outputs
Logic Low
l
428
438
448
mV
OTTH(RECOVER)
TEMP Overtemperature Recovery
Threshold
Ramping TEMP Upward Until HYST Outputs
Logic High
l
501
514
527
mV
UVOVTH
UVLO/OVLO/IOVRETRY
Undervoltage/Overvoltage Inception
Thresholds
Ramping UVLO, OVLO or IOVRETRY Positive
Until HYST Toggles Its State
l
488
500
512
mV
4.3
4.2
4641fe
6
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
電気的特性
TA
l
VIN
VINH
VINL
28V
45
25C
SYMBOL
PARAMETER
CONDITIONS
tUVOVD
UVLO/OVLO/IOVRETRY/ TEMP
Response Time
±50mV Overdrive (All Pins)
±5mV Overdrive, UVLO/OVLO/IOVRETRY Pins
Only (Note 4)
IUVOV
Input Current of UVLO, OVLO and
IOVRETRY
UVLO = 0.55V or OVLO = 0.45V or
IOVRETRY = 0.45V
VHOUSEKEEPING(UVLO)
Housekeeping Circuitry UVLO
Voltage on INTVCC, INTVCC Rising (Note 4)
Hysteresis, INTVCC Returning (Note 4)
VHYST(SWITCHING ON)
HYST Voltage (MHYST Off, RUN Logic
High)
RUN Electrically Open Circuit
RUN = 1.8V
VHYST(SWITCHING OFF,
HYST Voltage (MHYST Off, RUN Logic
Low)
FAULT)
Note 2
MIN
TYP
MAX
UNITS
50
25
125
100
500
µs
µs
±30
nA
l
l
1.9
5
2
25
2.1
50
V
mV
l
l
4.9
1.85
5.1
2.1
5.25
2.35
V
V
RUN = 0V
l
170
350
480
mV
HYST Voltage, Switching Action
Inhibited (MHYST On)
UVLO < UVOVTH or OVLO > UVOVTH or
IOVRETRY > UVOVTH or TEMP < OTTH(INCEPTION)
or CROWBAR > VCROWBAR(TH) or
DRVCC < DRVCCUVLO(FALLING)
(See Figures 62, 63)
l
30
65
mV
TMRUOTO
Timeout and Power-On Reset Period
CTMR = 1nF, Time from Fault Clearing to HYST
Being Released by Internal Circuitry
l
5
9
14
ms
VLATCH(IH)
LATCH Clear Threshold Input High
l
1.2
VLATCH(IL)
LATCH Clear Threshold Input Low
l
0.8
V
ILATCH
LATCH Input Current
VLATCH = 7.5V
l
±1
μA
ITMR(UP)
TMR Pull-Up Current
VTMR = 0V
l
–1.2
–2.1
–2.8
μA
ITMR(DOWN)
TMR Pull-Down Current
VTMR = 1.6V
l
1.2
2.1
2.8
μA
VTMR(DIS)
Timer Disable Voltage
Referenced to INTVCC
l
–180
–270
OTBHVIL
OTBH Low Level Input Voltage
OTBHVZ
OTBH Pin Voltage When Left
Electrically Open Circuit
–10μA ≤ IOTBH ≤ 10μA
l
0.6
0.9
IOTBH(MAX)
Maximum OTBH Current
OTBH Electrically Shorted to SGND
l
RUN)
VHYST(SWITCHING OFF,
V
l
Note 1 絶対最大定格に記載された値を超えるストレスはデバイスに永続的損傷を与える可
能性がある。また、長期にわたって絶対最大定格条件に曝すと、デバイスの信頼性と寿命に
悪影響を与える恐れがある。
LTM4641のSWピンの絶対最大定格である40Vは、デバイスの信頼性および寿命に影響しな
いことを保証する制御された方法で、VIN が 40VのときVOUT を安定化することにより、ATEで
検査される。VIN ＝40VでのSWピン漏れ電流の静的テストは、制御 ICのウェハ・レベルでのみ
実施される。
mV
0.4
V
1.2
V
30
μA
関で確認されている。LTM4641Iは–40°C ～ 125°Cの動作接合部温度範囲で保証されている。
LTM4641MPは–55°C ～ 125°Cの動作接合部温度範囲でテストされ、保証される。これらの仕
様と合致する最大周囲温度は、基板レイアウト、パッケージの定格熱インピーダンスおよび他
の環境要因と関連した特定の動作条件によって決まることに注意。
Note 3 異なるVIN、VOUT および TA の出力電流のディレーティング曲線を参照。
Note 4 ウェハ・レベルでのみ全数テストされる。
Note 2 LTM4641はTJ が TA にほぼ等しいパルス負荷条件でテストされる。LTM4641Eは、0°C ～
125°Cの接合部温度で性能仕様に適合することが保証されている。–40°C ～ 125°Cの動作接
合部温度範囲での仕様は、設計、特性評価および統計学的なプロセス・コントロールとの相
4641fe
詳細：www.linear-tech.co.jp/LTM4641
7
LTM4641
標準的性能特性
1
IN
2
RSET1A RSET1B
RSET2
V
36V
45
24V
IN
V
95
95
90
90
90
85
85
85
80
75
6.0VOUT
5.0VOUT
3.3VOUT
2.5VOUT
1.8VOUT
70
65
60
0
1
2
1.5VOUT
1.2VOUT
1.0VOUT
0.9VOUT
3
7 8
4 5 6
OUTPUT CURRENT (A)
9
EFFICIENCY (%)
95
EFFICIENCY (%)
EFFICIENCY (%)
V
RfSET
80
75
6.0VOUT
5.0VOUT
3.3VOUT
2.5VOUT
1.8VOUT
70
65
60
10
0
1
2
1.5VOUT
1.2VOUT
1.0VOUT
0.9VOUT
3
7 8
4 5 6
OUTPUT CURRENT (A)
4641 G01
V
IN
VIN
95
90
90
80
70
EFFICIENCY (%)
EFFICIENCY (%)
80
75
70
3.3VOUT
2.5VOUT
1.8VOUT
1.5VOUT
65
60
0
1
2
1.2VOUT
1.0VOUT
0.9VOUT
3
7 8
4 5 6
OUTPUT CURRENT (A)
9
10
60
28V/VOUT
IN
60
0
1
2
3
7 8
4 5 6
OUTPUT CURRENT (A)
9
10
38V
VOUT
50mV/DIV
AC-COUPLED
IOUT
2.5A/DIV
40
FCB = SGND
FORCED
CONTINUOUS
30
20
10
0
0.001
1.5VOUT
1.2VOUT
1.0VOUT
0.9VOUT
4641 G03
50
0.1
0.01
1
OUTPUT CURRENT (A)
20µs/DIV
0A TO 5A LOAD STEPS AT 5A/µs
FRONT PAGE CIRCUIT WITH
OVPGM = OPEN CIRCUIT
4641 G06
800µs/DIV
VIN = 24V
CIN(MLCC) = 2 × 10µF X7R
4641 G09
10
4641 G05
3.3V
VIN 28V/VOUT
VOUT
50mV/DIV
AC-COUPLED
VOUT
50mV/DIV
AC-COUPLED
IOUT
2.5A/DIV
IOUT
2.5A/DIV
4641 G07
6.0VOUT
5.0VOUT
3.3VOUT
2.5VOUT
1.8VOUT
1V
V IN
FCB = INTVCC
(PULSE-SKIPPING)
4.5V
20µs/DIV
0A TO 5A LOAD STEPS AT 5A/µs
FRONT PAGE CIRCUIT WITH
OVPGM = OPEN CIRCUIT
75
65
3.3V
4641 G04
1V V
80
70
10
12V
4641 G02
6V
85
9
IN
3.3V
VOUT
1V/DIV
IIN
200mA/DIV
RUN
5V/DIV
20µs/DIV
0A TO 5A LOAD STEPS AT 5A/µs
FIGURE 46 CIRCUIT
4641 G08
4641fe
8
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
標準的性能特性
1
RfSET
2
RSET1A RSET1B
RSET2
45
10A
VOUT
1V/DIV
VOUT
1V/DIV
VOUT
1V/DIV
ILOAD
1mA/DIV
IIN
200mA/DIV
RUN
5V/DIV
IIN
1A/DIV
RUN
5V/DIV
VINH
10A
SW
VOUT
VIN
20V/DIV
VINH
2V/DIV
VOUT
1V/DIV
VOUT
1V/DIV
CROWBAR
5V/DIV
VOUT
SW
3.3V
CROWBAR
5V/DIV
4641 G16
100ms/DIV
FIGURE 46 CIRCUIT, SHORT CIRCUITING VINH
TO SW IN SITU, OPERATING AT 38VIN AND
NO LOAD. LATCH CONNECTED TO INTVCC AND
CTMR = 47nF
VIN
28V
12
0.606
1.006
10
0.604
1.004
8
0.602
U1 IOUT
6
0.600
U2 IOUT
4
2
0
–2
0
4
8
12
20
16
TOTAL OUTPUT CURRENT (A)
4641 G17
1.002
VFB
1.000
V1VREF(DC)
0.598
0.998
0.596
0.996
1VREF VOLTAGE (V)
VOUT
1V/DIV
66
IC
1VREF
VIN 28V
VFB BANDGAP VOLTAGE (V)
VIN
10V/DIV
VINH
10V/DIV
4641 G15
800µs/DIV
FIGURE 46 CIRCUIT WITH VINH SHORT
CIRCUITED TO SW PRIOR TO POWER-UP.
APPLYING UP TO 38VIN. NO LOAD
4641 G14
400µs/DIV
FRONT PAGE CIRCUIT WITH VINH SHORT
CIRCUITED TO SW PRIOR TO POWER-UP.
APPLYING UP TO 38VIN. NO LOAD
MODULE OUTPUT CURRENT (A)
VINH
4641 G13
3.3V
VIN
10V/DIV
VINH
5V/DIV
CROWBAR
5V/DIV
20µs/DIV
VIN = 24V
CIN(MLCC) = 2 × 10µF X7R
SW
VOUT
VINH
1V
VOUT
200mV/DIV
IIN
1A/DIV
4641 G12
20µs/DIV
VIN = 24V
CIN(MLCC) = 2 × 10µF X7R
4641 G11
800µs/DIV
VIN = 24V
CIN(MLCC) = 2 × 10µF X7R
4641 G10
800µs/DIV
VIN = 24V
CIN(MLCC) = 2 × 10µF X7R
IIN
1A/DIV
0.994
0.594
–75 –50 –25 0 25 50 75 100 125 150
JUNCTION TEMPERATURE (°C)
4641 G18
4641fe
詳細：www.linear-tech.co.jp/LTM4641
9
LTM4641
ピン機能
SGNDA1
A3 B1
B3 C1
C4 K1 K3 L3 M1
M3
OTBH
TEMP
SGND
µModule
GND
SGND
SGND
514mV
HYST
10C
OTBH
PCB
GND
µModule
TEMP
/
1VREF
SGND
IOVRETRYA6
HYSTA4
LTM4641
UVLO
VINFALLING, MAX
4V
LTM4641
VINRISING, MAX
HYST
UVLO
4.5V
RUN
L
0.5V
0.5V
SGND
HYST
RUN UVLO OVLO IOVRETRY TEMP
CROWBAR INTVCC DRVCC
LTM4641
IC
H
OTBH
LATCH
MHYST
1
HYST
L
LTM4641
HYST
HYST
IOVRETRY
LTM4641 HYST
L
IOVRETRY
LTM4641
GND A7 A12 B6 B8, B11 B12 C7 C8 D6 D8
E1 E8 F1 F12 G1 G12 H3 H9 H11 H12 J5
J12 K5 K6 K11 K12 L4 L6 M4 M6
/
GND
UVLOB4
UVLO
0.5V
HYST
L
UVLO
LTM4641
0.5V
LTM4641
L
HYST
RUN
/
HYST
LTM4641
UVLO
4.5V VINFALLING, MAX
4V
1VREF
INTVCC
VINRISING, MAX
UVLO
H
H
UVLO
MHYST
MHYST
TEMPA5
TEMP
LTM4641
TEMP
NTC
438mV
LTM4641
HYST
UVLO
HYST
TEMP
145C
L
OVLOB5
OVLO
L
OVLO
0.5V
LTM4641
HYST
0.5V
LATCH
H
4641fe
10
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
ピン機能
VINL
LTM4641
L
LATCH
LTM4641
VINL
SGND
L
LATCH
LATCH
LTM4641
TMR
H
INTVCC
CROWBARB9
SGND
CTMR
L
OOV
LATCH
LTM4641
L
OOV
CROWBAR
LTM4641 OOV
N
MOSFET
LTM4641
1
MCB
CROWBAR
1.5V
L
LATCH
HYST
LTM4641
L
LTM4641
OOV
LATCH
H
CROWBAR
OVPGMB10
LTM4641
• CROWBARCROWBAR
OOV
LTM4641
666mVOV PTH
LTM4641
•
OVPGM
OVLO
•
OTBH
OTBH
TEMP
OOV
L
LATCH
VFB
600mV
OOV
LTM4641
H
LATCH
H
CROWBAR
LTM4641
HYST
LTM4641
H
LATCH
11%
LTM4641
VOUT
OVPGM
OOV
DC
LATCH
HYST
H
LTM4641
F
OOV
1VREFC6
TEMP
1V
OVPGM
1VREF
LATCHC5
LTM4641
LTM4641
MHYST
HYST
LATCH
SGND
VOUTC9
C12 D9
D12 E9
E12
LTM4641 DC/DC
VOUT
GND
4641fe
詳細：www.linear-tech.co.jp/LTM4641
11
LTM4641
ピン機能
GND
1
9
L
/
RUN
HYST
RUN
L
/
VORB+ D1 VOSNS+
VOSNS+
µModule
VORB–
+
VOSNSH1
LTM4641
VOUT
VORB+
+
VOSNS
–
VORBD2
µModule
VORB+
VOSNS–
VOSNS–
VOSNS+
0.6V
LTM4641
TRACK/SS
VOSNS+
RSET1A
VOSNS–
VORB+
+
VORB
VOSNS–
+
VOSNS
LTM4641
VORB–
–
VOSNSH2
–
VOSNS
GND
OTBHD3
TEMP
HYST
OTBH
HYST
L
LTM4641
SGND
OTBH
TMR
SGND
LTM4641 POR
1nF
9ms
VOSNS–
SWH10
SW
TMR
90μs
CSW
CTMR
INTVCC
RUND5
0.8V
MHYST
2V
LTM4641
HYST
10k
TMR
/
VORB–
VORB
VOSNS
CTMR
VOSNS–
–
+
TMRD4
POR
VOSNS+
0.6V
LTM4641
TRACK/SS
VOSNS–
L
RSET1B
GND
RSW
EMI
COMPJ1
LTM4641
RUN
COMP
HYST
RUN
L
INTVCC
RUN
HYST
4641fe
12
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
ピン機能
fSETJ2
LTM4641
IC
6V
LTM4641 INTVCC
ION
LDO
ION
MOSFETM
51
TOP
DRVCC
TRACK/SS
3V
fSET
60µs
fSET
2.2µF 4.7μF
GND
DRVCC
VINLJ3
LTM4641
INTVCC
VINL
CROWBAR
5.3V LDO
GND
0.1µF 1µF
GND
LTM4641 DC/DC
IC
5mA
INTVCC
X7R MLCC
VOUT
DRVCC
DRVCC
3.5V
/
MOSFETM
OOV
MSP
VINL
INTVCC
OOV
VINL
INTVCC
5V
VINH
IOUT
MOSFETM
E
DRVCC
LDO
47
INTVCCK4
49
DRVCCJ4
MOSFET
DRVCC
INTVCC
INTVCC
2
2 • VBE
25C
DRVCC
MOSFETM
MOSFET
BOT
5.3V LDO
INTVCC
6V
50mA
LDO
VINL
INTVCC
MOSFET
MOSFET
DRVCC
1.2V
LTM4641
MBOT
TOP
4.7µF
5V
MBOT
TOP
SGND
MOSFET
VINL
4.2V
HYST
L
FCBK2
LTM4641
INTVCC
MOSFET
INTVCC
INTVCC
DRVCC
20%
50mA
INTVCC
DRVCC
6V
LTM4641
VINL
INTVCC
4641fe
詳細：www.linear-tech.co.jp/LTM4641
13
LTM4641
ピン機能
VFB
51
VINHK7
10 L7
LTM4641
VINH
10%
12 M7
8 11
12
TRACK/SSL2
1.0μA
VINH
SGND
1nF
0.6ms
LTM4641
BGA
TRACK/
SS
LTM4641
2
LTM4641
LTM4641
OOV
MSP
VINH
LTM4641
MOSFET
VINGM9
LTM4641
OOV
N
VINH
MSP
MSP
VINH
MOSFET
VINGP
VING
OOV
GND
LTM4641
VINGP
M10
OOV
OOV
N
GND
VINH
GND
VING
VINGP
LTM4641
VINH
MOSFETMSP
OOV
PGOODL1
4641fe
14
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
簡略ブロック図
VIN
RHYST
RTUV
VINL
INTVCC
UVLO
RBUV
0.1µF
10k
HYST
MHYST
ENABLE
SWITCHING
ACTION
VING
RMOV
IOVRETRY
CONSTANT
ON-TIME
VALLEY MODE
SYNCHRONOUS
BUCK
CONTROLLER
PROTECTION
COMPARATORS
AND
FAULT LATCHES
OVLO
1VREF
RBOV
TEMP
SW
0.8µH
VOUT
10µF
VOUT
0.6V TO 6V
UP TO 10A
COUT(MLCC)
SGND
TMR
LATCH
FCB
COMP
DRVCC
FAST OUTPUT
OVERVOLTAGE
COMPARATOR
INTVCC
ENABLE
COVPGM
INTERNAL
COMP
499k
MCB
C
VORB–
+
REF
4µF
OVPGM
R
–
1VREF
CROWBAR
8.2k
TRACK/SS
RBOVPGM
COUT(BULK)
MBOT
VFB
TO E/A
PGOOD
RTOVPGM
+
GND
OTBH
CSS
MSP
VINH
3.48k
OSC
CIN(BULK)
2.2µF
NTC
CTMR
+
VINGP
15V
ZENER
MTOP
RTOV
CIN(MLCC)
RfSET*
fSET
POWER
CONTROL
VIN
1.3M
ION
VIN
4V TO 38V
(4.5V START-UP)
8.2k
VOSNS–
8.2k
VOSNS+
8.2k
RSET1B
RSET2
RSET1A
VORB+
 R
2 • RSET1A 
VOUT = 0.6 1+ SET1A +

RSET2 
 8.2kΩ
1M
RUN
4641 F01
DASHED BOXES INDICATE OPTIONAL COMPONENTS
*RfSET REQUIRED FOR CERTAIN VIN/VOUT COMBINATIONS
SEE APPLICATIONS INFORMATION SECTION
SGND CONNECTS TO GND INTERNAL TO MODULE, KEEP SGND
ROUTES/PLANES SEPARATE FROM GND, ON MOTHERBOARD
1
A
USE RSET1A = RSET1B ≤8.2k
RSET2 REQUIRED FOR VOUT > 1.2V
RSET2 NOT NECESSARY FOR VOUT ≤ 1.2V
62
デカップリングの要件
SYMBOL
PARAMETER
CONDITIONS
CIN(MLCC) +
CIN(BULK)
External Input Capacitor Requirement
IOUT = 10A, 2 × 10μF or 4 × 4.7μF
MIN
TYP
20
MAX
UNITS
μF
COUT(MLCC) +
COUT(BULK)
External Output Capacitor Requirement
IOUT = 10A, 3 × 100μF or 6 × 47μF
300
μF
4641fe
詳細：www.linear-tech.co.jp/LTM4641
15
LTM4641
動作
µModule
μModule
LTM4641
MOSFET
45
DC/DC
LTM4600
10A
0.6V DC 6V DC
4V 38V
LTM4641
VINL
LTM4641
A
http://www.linear.com/
4.5V
docs/13557
LTM4641
1
μModule
62
46
LTM4641 4V 38V
4.5V
0.6V 6V
VIN
24V DC
28V DC
VIN
28V DC
N
1
VINH
MOSFETMSP
MSP
1
40V
MSP
VING
-
VINGP
6V
DC/
DC
15V
VING
VINH
MOSFET
MSP
10V
FMEA
MSP
VINH
LTM4641
MSP
VINH
VOUT
MOSFET
RUN
LTM4641
L
OOV
MSP
MSP
LTM4641
VINH
4641fe
16
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—電源機能
MSP
OOV
•
•
•
MSP
VINH
•
SW
N
•
MOSFETMCB
OOV
CROWBAR
500ns
LTM4641
• RUN
LTM4641
MCB
MOSFET
47
LTM4641
VINH
LTM4641
VINL
LTM4641
V INL
•
<500ns
<12mV
•
VINH
LTM4641
OOV
N
46
47
MOSFET
LTM4641
•
49
<2.4%
•
•
N
UVLO
<2.4%
•
•
•
•
UVLO
3.3V
MOSFET
VINH
UVLO
DC/DC
VINL
VINL
VINH
VINL
VINH
3.5V
VINL
2ms
3.5V
VINH
VINH
LTM4641
MOSFET
LTM4641
VINL
VINH
VINH
•
UVLO
• POL
•
VINH
0
4
•
4641fe
詳細：www.linear-tech.co.jp/LTM4641
17
LTM4641
アプリケーション情報—電源機能
UVLO
11
47
MOSFETM
LT3010-5
VINL
VIN
VINH
1
80V
VIN
D2
ION
TOP
PFM
VINL
VIN
UVLO
VINL
VINH
3.5V
VINL
3.5V
MOSFET
MBOT
VINL
45
46
VINH
LTM4641
MBOT
RDSON
MOSFET
47
VIN
MTOP
VINL
2
1Ω
TMR
tON =
INTVCC
POR
C
TMR
3ms
TMR
2
LTM4641
INTVCC
VIN-VOUT
0.7V •10pF
IION
IION
A
RfSET
C
V
SS
IION =
VIN
5V/DIV
(1)
IION
VINL
-fSET
A
VINL
1.3MΩ
VINL
1.3MΩ
(2)
LTM4641
VINL
5V/DIV
Hz
VOUT
500mV/DIV
2ms/DIV
2
3V
47
INTVCC
VINL
POR
1Ω
VIN
fSW =
4641 F02
TMR
VIN
VOUT
0.7V •1.3MΩ •10pF
(3)
VOUT
VOUT
V
3V
RfSET
VOUT
DC/DC
LTM4641
RfSET
COMP
4641fe
18
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—電源機能
• VINL
LTM4641
RfSET
VINL
VINH
RfSET
fSET
ION
A
IION =
VINL
V
VINL
+ INL =
1.3MΩ R fSET 1.3MΩ||R fSET
VINL
VOUT
(4)
Ω
V RfSET
VINH
49
RfSET VINH
47
45
46
47
RfSET
3
3
43ns
75ns
tON
75ns
1
100ppm/C
93.3μA
RfSET VINL
VINL VINH
46
VOUT
0.7V • (1.3MΩ||R fSET ) •10pF
(5)
Ω VOUT
RfSET
V
Hz
fSW =
VOUT
VOUT • IION
=
VINH • tON VINH • 0.7V •10pF
-fSET
50
RfSET vs VOUT
REGION
TO AVOID
700
RfSET NOT
NEEDED FOR
VOUT > 3V
600
500
10
400
5
300
1
200
0.5
0.1
(6)
C
• VINL
100
MAX RECOMMENDED RfSET
SWITCHING FREQUENCY
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
NOMINAL OUTPUT VOLTAGE (V)
100
TYPICAL fSW AT FULL LOAD (kHz)
Hz
fSW =
RfSET
5%
RfSET
MAXIMUM RECOMMENDED RfSET VALUE (MΩ)
45
IION
51
RfSET
RfSET
3V
LTM4641
1
VIN
0
4641 F03
3
RfSET
1.3MΩ
RfSET
3V
4641fe
詳細：www.linear-tech.co.jp/LTM4641
19
LTM4641
アプリケーション情報—電源機能
1
RfSET
45
46
47
RfSETM Ω EIA
VOUTNOM V
0.6
0.787
V
• VOUT
51
• tOFFMIN
fSWkHz
0.7
0.825
200
0.887
215
0.9
0.931
235
1.0
1.00
255
1.2
1.13
285
1.5
1.43
315
1.8
2.00
325
2.0
2.55
330
2.5
5.76
335
3.0より高い
∞（不使用）
図 2 参照
3.3
∞（不使用）
360
5.0
∞（不使用）
550
6.0
∞（不使用）
660
300ns
• tON
LTM4641
• RPS
VOUT
VIN ≥ 6V
TJ ≈ 125C
INTVCC
VIN < 6V
MTOP
50mΩ
PCB
RPS
VOUT
45
RfSET
MOSFETM TOP
IC ION
VINH
• IOUT
3
MBOT
175
0.8
RfSET
0.5V
MTOP
A
46
47
3V < VOUT ≤ 6V
VINH
VOUT
750kΩ
4
1
3
1
RfSET
2
VINDROPOUT
VINH
DRVCC
VINL< 6V
INTVCC
3
IION < 93.3µA
I
1
tON VINH
MSP
4
RPS
II
t
M
LTM4641
OFFMIN
MOSFET
5.3V
DRVCC
MTOP
DRVCC
4
fSW
tON
III
BOT
MBOT
VINH
Hz
V
fMAX =
 tOFF(MIN) 
VIN(DROPOUT) = VOUT •  1+
+R •I
tON  PS OUT

1
(8)
tON + tOFF(MIN)
(7)
tOFFMIN
300ns
4641fe
20
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—電源機能
COMP
8.0
MTOP
LINE DROPOUT VOLTAGE (V)
7.5
7.0
COMP
6.5
6.0
5.5
5.0
4.5
LTM4641
4.0
UVLO
VINDROPOUT
11
3.5
3.0
3
3.5
4.5
5
5.5
4
OUTPUT VOLTAGE SETTING (V)
VIN < VINDROPOUT
6
VINH
MOSFETMSP
4641 F04
10A OUTPUT, DRVCC BIASED FROM INTVCC (5.3VNOM)
10A OUTPUT, DRVCC BIASED TO 5.3V BY EXTERNAL SUPPLY
NO LOAD, DRVCC ≥ 4.2V(UVLO RISING) AND 3.5V
(UVLO FALLING)
4
RfSET
45
46
47
RSET1A RSET1B RSET2
VOUT
MSP
3V
POL
LTM4641
DC
PFM
fMAX
1.5%
fSW
fMAX
POL
LTM4641
5
fMAX
VOUT
CFFA, CFFB: FEEDFORWARD CAPACITORS YEILD IMPROVED TRANSIENT
RESPONSE WHEN FILTERING VOUT WITH ONLY MLCC OUTPUT CAPACITORS
(COUT(MLCC))
LTM4641
VFB
TO ERROR
AMPLIFIER
+
CFFA
VORB+
8.2k
8.2k VOSNS+
–
8.2k
TRUE DIFFERENTIAL REMOTE
SENSE AMPLIFIER
ICT
TEST
POINT
+
SGND
GND
SGND CONNECTS TO GND INTERNAL TO MODULE. KEEP
MODULE SGND ROUTES/PLANES SEPARATE FROM GND
ON MOTHERBOARD
LOAD
RSET1B
VOSNS–
VORB–
COUT(MLCC)
RSET1A
RSET2
8.2k
COUT(BULK)
VOUT
ICT
TEST
POINT
CFFB
PLACE ALL
FEEDBACK
COMPONENTS
LOCAL TO THE
LTM4641
4641 F05
ROUTE FEEDBACK SIGNAL AS
A DIFFERENTIAL PAIR (OR
TWISTED PAIR IF USING WIRES).
SANDWICH BETWEEN GROUND
PLANES TO FORM A PROTECTIVE SHIELD
GUARDING AGAINST STRAY NOISE
5
4641fe
詳細：www.linear-tech.co.jp/LTM4641
21
LTM4641
アプリケーション情報—電源機能
POL
1
5
–
-VOSNS
VOSNS+
TRACK/SS
600mV
RSET1A
RSET1B
PCB
25ppm/C
RSET2
SMT
VOUT
RSET1A
VOSNS+ VOSNS–
VORB+ VORB–
ICT
0.1%
1.2V
RSET2
RSET1B
V

RSET1A = RSET1B =  OUT – 1 • 8.2kΩ
 0.6V 
VOUT
RSET1B 8.2kΩ
(9)
1.2V
RSET1A
8.2kΩ
RSET2
RSET2 =
1
RSET1A
MTOP
2
2 •RSET1A
VOUT RSET1A
–
−1
0.6 8.2kΩ
LTM4641
RSET1A
ICT
RSET1B
10
(10)
9
RSET2
RSET1B
VOSNS+
VOUT
MLCC
ESR
VOUT
1.2V
RSET1A
RSET1A
RSET1B
1.2V


∆V
0.6V
VVOSNS+ = 
+ GND 
 ( 8.2kΩ||RSET1A ||RSET2 ) RSET1A 
POL
VOUT
VOSNS–
(11)
• (RSET1A ||16.4kΩ )
RSET2
RSET1B
MLCC
CFFA
CFFB
RSET1A
RSET1B
VVOSNS– = VVOSNS+ – 0.6V
∆VGND
(12)
POL
SGND
LTM4641
V
I•R
∆VGND = VGND(POL) – VSGND(LTM4641)
(13)
4641fe
22
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—電源機能
RSET1A RSET1B
RSET2
 R
2 •RSET1A 
VOUT = 0.6V •  1+ SET1A +
RSET2 
 8.2kΩ
(14)
RSET1A RSET1B
49
RSET2
2
2
RSET1B
RSET2
45
VINH
GND
10μF 2
4.7μF 4
MSP
46
MSP LTM4641 VINH
MSP
GND
10μF 2
4.7μF 4
44
47μF 100μF
47
RSET1A
5
VOUT
RSET1A RSET1B
RSET2
0.6V
0Ω
∞（不使用）
0.7V
1.37kΩ
∞（不使用）
0.8V
2.74kΩ
∞（不使用）
0.9V
4.12kΩ
∞（不使用）
1.0V
5.49kΩ
∞（不使用）
1.2V
8.2kΩ
∞（不使用）
1.5V
8.2kΩ
33.2kΩ
1.8V
8.2kΩ
16.5kΩ
2.0V
8.2kΩ
12.4kΩ
2.5V
8.2kΩ
7.5kΩ
3.3V
8.2kΩ
4.7kΩ
5.0V
8.2kΩ
2.61kΩ
6.0V
8.2kΩ
2.05kΩ
D
VIN
MLCC
ESR
ESR
LC
ICIN(RMS) =
η
MTOP
IOUT(MAX)
η
• D• (1–D)
(15)
LTM4641
D
•
•
GND
•
MTOP
50cm
D=
VOUT
VIN
(16)
/
LTM4641
DC
AC
MLCC
43
MOSFETMSP
LTM4641
4641fe
詳細：www.linear-tech.co.jp/LTM4641
23
LTM4641
アプリケーション情報—電源機能
COUTBULK
ESR
COUTMLCC
DC/
DC
LTM4641
dI/dt
POL
MBOT
COUTMLCC
COUTBULK
ESR
ESR
OVPGM
FCB
MLCC
INTVCC
FCB
COUTMLCC
SGND
CFF
20mA
5
VING
COUTMLCC
X5R
PCB
85C
125C
X5R
X7R
MLCC
E
15%
X7R
X5R
MLCC
DC
TRACK/SS
200μF
LTM4641
LTM4641
RUN
800μF
HYST
RUN
μA
L
HYST
TRACK/SS
TRACK/SS
CSS
9
ESR
MTOP
1nF
0.6ms
TRACK/SS
VFB
MBOT
TRACK/SS
LTpowerCAD ™
IC
600mV
600mV
VFB
VOUT
4641fe
24
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—電源機能
LTM4641
VOUT
VMASTER
3
6
VMASTER
OUTPUT VOLTAGE
LTM4641
600mV
RTAC
LTM4641
7
8
U1
RTAC RTBC
4641 F06a
6a
 VOUT_SLAVE_C (FS OUTPUT) 
R TAC = 
– 1 •R TBC
0.6V


VMASTER
OUTPUT VOLTAGE
7
U1
U1
U2
FS
VOUT
RTBC
SS
RTBC
U1
6
1V
1V
RTAC
U2 TRACK/
600mV
10kΩ
6.65kΩ
4641 F06b
6b
RTAC
1V/0.6V 1 • 10kΩ
10k
TRACK/SS
1µA
RTAC/RTBC
2
LTM4641
600mV
TRACK/SS
LTM4641
FS
RSET1B
RSET1A
RSET2
2
RfSET
1
VOUT 0.8V
RfSET
887kΩ
1
3
(17)
1.8V
TIME
1
RTBC
VOUT_MASTER LTM4641
TRACK/SS
SGND
U1
U2
VOUT
TIME
TRACK/SS
RTAR RTBR
VOUT_MASTER LTM4641
TRACK/SS
SGND
U1
RTAR RTBR
LTM4641
7
8
U3
 VOUT_MASTER (FS_OUTPUT) 
R TAR = 
– 1 •R TBR
0.6V


(18)
LTM4641
RfSET
4641fe
詳細：www.linear-tech.co.jp/LTM4641
25
LTM4641
アプリケーション情報—電源機能
VIN
4V TO 38V
(4.5V START-UP)
+
CINM(BULK)
50V
CINM(MLCC)
10µF
50V
×2
VINL
RMfSET
2M
VING VINGP VINH
SW
VOUT
CROWBAR
fSET
LATCH
VORB+
UVLO
HYST
FCB
1
U1
LTM4641
VOSNS
INTVCC
DRVCC
RSETM2 RSETM1B
16.4k
8.2k
–
VOSNS
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
1
RUN
U1 VOUT RAMP TIME
tSOFTSTART = 0.6ms/nF • CSS
(CSS IN nF)
RSETM1A
8.2k
+
IOVRETRY
OVLO
RUN
1
TRACK/SS
TMR
COMP
CSS
4.7nF
SGND
VOUT_MASTER
1.8V
UP TO 10A
COUTM(MLCC)
100µF
6.3V
×3
CFFMA
220pF
LOAD
LOCAL HIGH
FREQUENCY
DECOUPLING
CFFMB
220pF
GND
1
1
+
CINSC(BULK)
50V
CINSC(MLCC)
10µF
50V
×2
VINL
RCfSET
680k
VING VINGP VINH
COINCEDENT TRACKING
OF THE 1.8V RAIL
VOUT_SLAVE_C
1V
COUTSC(MLCC)
UP TO 10A
100µF
6.3V
×4
SW
VOUT
CROWBAR
fSET
LATCH
VORB+
UVLO
HYST
FCB
2
VOUT_MASTER
RTAC
6.65k
INTVCC
DRVCC
RSETC1B
5.49k
–
VOSNS
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
2
RUN
RSETC1A
5.49k
VOSNS+
IOVRETRY
OVLO
RTBC
10k
2
U2
LTM4641
2
RUN
TRACK/SS
TMR
COMP
SGND
LOAD
LOCAL HIGH
FREQUENCY
DECOUPLING
GND
2
+
CINSR(MLCC)
10µF
50V
×2
VINL
CINSR(BULK)
50V
RRfSET
1M
VING VINGP VINH
SW
VOUT
CROWBAR
fSET
LATCH
VORB+
UVLO
HYST
FCB
3
VOUT_MASTER
RTAR
20k
VOSNS
INTVCC
DRVCC
VOSNS
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
RUN
TRACK/SS
RSETR2 RSETR1B
8.2k
33.2k
–
3
RUN
RSETR1A
8.2k
+
IOVRETRY
OVLO
RTBR
10k
3
U3
LTM4641
3
TMR
COMP
SGND
GND
RATIOMETRIC TRACKING
OF THE 1.8V RAIL
VOUT_SLAVE_R
1.5V
COUTSR(MLCC)
UP TO 10A
100µF
6.3V
×4
CFFRA
220pF
LOAD
LOCAL HIGH
FREQUENCY
DECOUPLING
CFFRB
220pF
4641 F07
3
U1, U2 AND U3 SGND ( 1, 2, 3) CONNECT TO GND INTERNAL TO THEIR RESPECTIVE MODULES.
KEEP SGND ROUTES/PLANES OF MODULES SEPARATE FROM EACH OTHER AND FROM GND ON MOTHERBOARD
7
LTM4641
8
4641fe
26
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—電源機能
7
U1
U1
DRVCC
MOSFET
INTVCC
1.8V
U3
1.5V
RTAR
1.8V
600mV
U1
U3 TRACK/SS
RTBR
RTAR
1.8V/0.6V 1 • 10kΩ
10k
TRACK/SS
1µA
7
VOUT_SLAVE_C
INTVCC
RTBR
VOUT_MASTER
VOUT_SLAVE_R
VOUT
10kΩ
20kΩ
DRVCC
30mA
LTM4641
6V
DRVCC,
LDO
PLOSS(INTVCC_LDO) = (VINL – 5.3V) • (5mA + IDRVCC)
51
6Ω
(19)
INTVCC/DRVCC
5V
6V
LDO
8
INTVCC
INTVCC
U1 VOUT
1V/DIV
5C
52
55
INTVCC/DRVCC
U2 VOUT
1V/DIV
VOUT
VIN
U3 VOUT
1V/DIV
INTVCC/DRVCC
RUN
5V/DIV
U3
7
VINL
VINL
/
VINL
MOSFET
4641 F08
2ms/DIV
8 U1 U2
LDO
OR
VAUX
LTM4641
VINL
60μs
TRACK/SS
100pF
DRVCC
DRVCC
INTVCC
4.05V
DRVCC
LTM4641
DRVCC
5.3V
3.35V
VINL
INTVCC
MOSFET
LDO
VINL
MOSFET
DRVCC
12
DRVCC
VINL
TRACK/SS
60μs
CSS
100pF
4641fe
詳細：www.linear-tech.co.jp/LTM4641
27
LTM4641
アプリケーション情報—電源機能
TEMP OTBH
fMAX
8
DRVCC
1
INTVCC
INTVCC
1VREF
SGND
NTC
DRVCC
INTVCC
TEMP
4.7μF20%
25C
NTC
10
585mV
0.98V 125C
TEMP
TEMP
1VREF
LTM4641
IC
IC
600mV
1VREF
OOV
NTC25C
1VREF
HYST
TEMP
1V 1.5%
OVPGM
L
438mV
147C
TEMP
L
OTBH
438mV
/
470k B < 5000K
47
100μA
TEMP
438mV
OTBH
TEMP
514mV
136C
1VREF
OVPGM
LTM4641
OVPGM
1VREF
0μA
LTM4641
100μA
125C
125C
100A/s
1VREF
OVPGM
9
TEMP
1VREF
100mV/DIV
AC-COUPLED
10
OVPGM
10mV/DIV
AC-COUPLED
1VREF
TEMP
A
SGND
12
20µs/DIV
9 100A/s
1VREF
VIN 28V
62
TEMP
I1VREF
50µA/DIV
1VREF
45
4641 F09
0μA⇔100μA
OVPGM
1VREF
4641fe
28
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—入力保護機能
1000000
UVLO
0.95
0.75
100000
0.65
0.55
10000
0.45
0.35
1000
–55
–15
25
65
105
145
JUNCTION TEMPERATURE (°C)
0.25
185
4641 F10
10 NTC
51
TEMP PIN VOLTAGE (V)
NTC RESISTANCE (Ω)
0.85
UVLO
VINL
VINH
UVLO
49
UVLO
47
MOSFETMSP
MSP
NTC
MOSFET
MSP
TEMP
MSP
IOVRETRY
UVLO IOVRETRY OVLO
UVLO
0.5V
0.5V
HYST
UVLO
H
OVLO
HYST
IOVRETRY
0.5V
IOVRETRY
OVLO
IN
VIN
IOVRETRY
VIN
0.5V
VIN
0.5V
OVLO
+
VINL
0.5V
0.5V
RTUV
HYST
RBUV
L
/
RTOV
RMOV
LTM4641
UVLO
UVLO
UVLO < 0.5V = OFF
RHYST
HYST PULLS UP WHEN
ON, HYST PULLS DOWN
WHEN OFF
IOVRETRY > 0.5V = OFF
OVLO > 0.5V = LATCHOFF
VINH
UVLO
LTM4641
HYST
IOVRETRY
OVLO
SGND
RBOV
GND
UVLO
4641 F11
HYST
LTM4641
4.5V
UVLO
UVLO
VIN
4V
CIN(MLCC)
10µF
×2
CIN(BULK)
L
3
OVLO
UVLO HYST IOVRETRY OVLO
11
OVLO
HYST
OVLO
UVLO
UVLO/IOVRETRY/OVLO
A
IOVRETRY
HYST
L
IOVRETRY
V
UVLO
UVLO
L
0.5V
SGND CONNECTS TO GND INTERNAL TO MODULE.
KEEP SGND ROUTES/PLANES SEPARATE FROM GND
ON MOTHERBOARD
11 LTM4641
UVLO
UVLO
VIN
4641fe
詳細：www.linear-tech.co.jp/LTM4641
29
LTM4641
アプリケーション情報—入力保護機能
• VSU VIN
V
UVLO
• VSD VIN
UVLO
V
• VHYSTV
VSD
IN
VHYST
RUN
4.1V
UVLO
1MΩ
UVLO
10kΩ
HYST
HYST
HYST
INTVCC
HYST
50mV
HYSTV
• RHYST
HYST
H
RHYST
UVLO
1MΩ
• VOV


R TUV
VSU = UVOVTH • 
+1
 RBUV ||RHYST 
• VRT
VSD = VSU –
RTUV
R TUV =
RBUV
VSU − VSD
•RHYST
VHYST
VHYST
•R TUV
RHYST
(20)
IDIV
UVOVTH
VSU −UVOVTH UVOVTH
–
R TUV
RHYST
R TOT =
VOV
IDIV
(24)
RBOV =
R TOT •UVOVTH
,
VOV
(25)
0.5V
VHYST
LTM4641
VINL ≥ 6V
INTVCC 5.3V
HYST
5.1V
RUN
3.3V
VHYST 3.3V
VHYST
4.5V
20µA
(21)
UVOVTH
1
(23)
RTOV/RMOV/RBOV
10μA
RBUV =
(22)
VHYSTSWITCHING_ON
H
3.6V
VHYST
VSD
INTVCC
VIN 6V
INTVCC
VINL
VINL
4.3VV
 1
1 
RMOV = UVOVTH •R TOT • 
–
,
 VRT VOV 
(26)
RTOV = RTOT – RM – RB
(27)
RTOV
INTVCCLOWLINE
RMOV RBOV
0.5V
4641fe
30
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—入力保護機能
RTOV
RMOV
RBOV
VIN
EIA
24
LTM4641
• RUN
1.25V
2V
POR
27
RUN
EIA
•
POR
CTMRTMR

R
+R
VOV = UVOVTH •  TOV MOV +1
RBOV


(28)
a. DRVCC > 4.05V
VINL
49


R TOV
VRT = UVOVTH • 
+1
 (RMOV +RBOV ) 
LTM4641
45
4.5V
46
4.05V
b. UVLO > 500mV
(29)
c. IOVRETRY < 500mV
IC
UVLO IOVRETRY OVLO
12
d. TEMP > 514mVOTBH
•
LTM4641
TYPICAL TRANSIENT DURATION (µs)
700
LTM4641
600
500
RESPECTIVE
FAULT CONDITION
BECOMES DETECTED
H
LATCH
LATCH
400
L
H
LTM4641
LATCH
300
200
100
GLITCH
IGNORED
0
1
10
100
0.1
COMPARATOR OVERDRIVE PAST THRESHOLD (%)
CTMR
LATCH
4641 F12
12
TEMP CROWBAR
/
H
DRVCC
H
UVLO IOVRETRY OVLO
LTM4641
a. OVLO < 500mV
RUN
d. TEMP > 514mVOTBH
LTM4641
DC/DC
UVLO OVLO IOVRETRY
TEMP
L
c. CROWBAR < 1.5V
POR
9ms
CTMR
POR
CTMR
1nF
90μs
4641fe
詳細：www.linear-tech.co.jp/LTM4641
31
LTM4641
アプリケーション情報—負荷保護機能
HYST
L
H
LATCH
INTVCC
LTM4641
2V
L
HYST
VINL
LTM4641
GND
OCP
VOUT
3
24A
1
8A
LTM4641
LATCH
H
INTVCC
CTMR
CTMR
CTMR
• RUN
47
POR
POR
TMR
10%
12μs
PGOOD
L
PGOOD
INTVCC
1.15V
0.8V
2%
PGOOD
3%
POR
PGOOD
M
•
a. DRVCC
46
3.35V
VINL
b. UVLO
BOT
GND
PGOOD
45
4V
OVPGM
LTM4641
0.5V
c. IOVRETRY
MOSFET
LTM4641
H
0.5V
d. OTBH
TEMP
MTOP
11%
CROWBAR
500ns
MBOT
438mV
MSP
•
a. OVLO
0.5V
b. CROWBAR
/
1.5V
c. OTBH
438mV
L
LTM4641
TEMP
2.6μs VINH
MOSFET
IC
TEMP
B
DRVCC
UVLO IOVRETRY OVLO TEMP CROWBAR
MOSFET
DRVCC
12
4641fe
32
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—負荷保護機能
CROWBAR
10kΩ
MOSFETMCB
LTM4641
OOV
MSP
1VREF
H
10nF
CROWBAR
MCB
400μs
4
MCB
MOSFETMSP
MOSFETMCB
CROWBAR
HYST
VFB
OVPGM
OVPERR
500ns
CROWBAR
VOUT
MCB
OOV
2.6µs
OOV
VING
MSP
OOV
RUN
2
OOV
L
OOV
VFB
LTM4641
46
L
A
CROWBAR
MCB MSP
LTM4641
/
MCB
OOV
MLCC
CROWBAR
OOV
MCB
LTM4641
0.5mm
MSP
OOV
CROWBAR
MCB
20
MCB
MCB
A
MCB
MCB
H
MCB
1.5V
CROWBAR
VING
CROWBAR
HYST
L
12
PN
10nF
A
10nF
62
OOV
MCB
H
MCB
OOV
• MCB
CROWBAR
CROWBAR
10kΩ
PN
• MCB
N
-
MOSFET
VOUT
PEAK,OOV_DETECTED
4641fe
詳細：www.linear-tech.co.jp/LTM4641
33
LTM4641
アプリケーション情報—負荷保護機能
• CROWBAR
H
• MSP
MCB
/RDSON
VOUTPEAK,OOV_DETECTED
MOSFET
MOSFET
MOSFET
MCB
•
1ms
MSP
400μs
VOUT
MCB
VINH
4.7nF
CISS
4 • RDSON
• COUTTOTAL
• MSP
MCB
LTM4641
MOSFET
MOSFET
RDSON
IQVINH
• MCB
SCR
MOSFET
5V
MCB
VOUTPEAK,OOV_DETECTED
2
/
MOSFET
RDSON
MOSFET
MCB
SCR
LTM4641
LTM4641
LATCH
LTM4641
H
PN
SCR
H
CROWBAR
DC1543
MCB
MCB
CTMR
MOSFET
MCB
OVPGM
499kΩ
LTM4641
MSP
R1 R2
RT1
47
MCB
R3
1VREF
1MΩ
666mV
OOV
CROWBAR
VFB
TRACK/SS
600mV
LTM4641
H
VFB
MTOP
MOSFET
MSP
VING
MSP
VINGP
OVPGM
666mV
11%
1VREF
OVPGM
OOV
MSP
• MSP
MOSFET
TRACK/SS
MSP
N
OOV
OOV
OVPGM
OVPGM
SGND
0.1%
4641fe
34
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—EMI 性能
OVPGM
VINHMAX
OOV
V
fSW
INH
F
NPO C0G
SW
LTM4641
SW
X7R
R
SW
MOSFET
GND
DC/DC
CSW
SW
5nH
CSW
RSW =
RC
(31)
ESL
0.7Ω
4.2Ω
30MHz
RC
DC1543
LTM4641
EMI
13
/
16
EMI
5dB
SW
PCB
VINH
PCB
1W
LTM4641
MOSFET
LTM4641
600mW PSNUB
CSW
CSW =
PSNUB
(30)
VINH(MAX)2 • fSW
70
SIGNAL AMPLITUDE (dB µV/m)
60
70
SIGNAL AMPLITUDE (dB µV/m)
60
50
EN55022
CLASS B
LIMIT
40
30
50
EN55022
CLASS B
LIMIT
40
30
20
10
0
–10
20
30
226.2
10
814.8
422.4 618.6
FREQUENCY (MHz)
4641 F13
0
–10
14 VIN
30
226.2
814.8
422.4 618.6
FREQUENCY (MHz)
1010
12V
VOUT
fSW 550kHz CINBULK
4.7μF X7R 10m
LTM4641
DC1543
2100 μF CINMLCC
410 μF X7R
12V VOUT
SW
10nF RSW 1Ω1W
CINMLCC
410 μF X7R
4641 F13
13 VIN
1010
5V/10A
5V/10A
LTM4641
GND
DC1543
CSW
fSW 550kHz CINBULK
2100 μF
24.7 μF X7R 10m
2
4641fe
詳細：www.linear-tech.co.jp/LTM4641
35
LTM4641
70
70
60
60
SIGNAL AMPLITUDE (dB µV/m)
SIGNAL AMPLITUDE (dB µV/m)
アプリケーション情報—EMI 性能
50
40
30
20
10
50
40
30
20
10
0
–10
0
30
226.2
814.8
422.4 618.6
FREQUENCY (MHz)
–10
1010
30
226.2
814.8
422.4 618.6
FREQUENCY (MHz)
4641 F15
15 VIN
24V
VOUT
4641 F16
2.5V/10A
fSW 335kHz CINBULK
24.7 μF X7R 10m
1010
LTM4641
DC1543
2100 μF CINMLCC
410 μF X7R
16 VIN
24V
2.2nF RSW
100μF CINMLCC
VOUT
SW
2.5V/10A
LTM4641
GND
DC1543
2.2Ω1W
fSW 335kHz CINBULK
410 μF X7R 24.7 μF X7R 10m
CSW
2
アプリケーション情報—複数モジュールの並列動作
LTM4641
10A
LTM4641
4
40A
2
20A
LTM4641
56
66
LTM4641
LTM4641
LTM4641
• VOUT
• GND
• VINH
• VINL
• HYST
400kHz
410kHz
EMI
400kHz 410kHz
10kHz
LTM4641
LC
• TRACK/SS
• COMP
• CROWBAR
• LATCH
• VING
MSP
4641fe
36
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—複数モジュールの並列動作
• VOSNS+ VOSNS–
GND
• VOSNS– VOSNS+
GND
n
HYST
RUN
L
1.2V
RSET1A
• PGOOD
1
VOUT
V
  8.2kΩ 
RSET1A = RSET1B =  OUT – 1 • 
 0.6V   n 
L
LTM4641
VOUT
(32)
1.2V
RSET1A
RfSET
I
1
ION
RSET1A = RSET1B =
3
UVLO
8.2kΩ
n
1
LTM4641
DRVCC
INTVCC
56
MSP
1
66
(33)
RSET2
RSET2 =
DRVCC
51
2 •RSET1A
R
VOUT
– n • SET1A – 1
0.6
8.2kΩ
(34)

R
2 •RSET1A 
VOUT = 0.6V  1+n • SET1A +
8.2kΩ
RSET2 

MSP
VINGP
MSP
VINH
(35)
VOSNS+
LTM4641
MSP MOSFET
1
VOSNS+
VOSNS–


∆VGND 
0.6V

VVOSNS+ = 
+

8.2kΩ
||RSET1A ||RSET2 RSET1A 


n
CDM1 CDM2
(36)
16.4kΩ 

•  RSET1A ||


n 
VOSNS–
12
∆VGND
13
TRACK/SS
n • 1μA
4641fe
詳細：www.linear-tech.co.jp/LTM4641
37
LTM4641
アプリケーション情報—熱に関する検討事項および出力電流のディレーティング
2 θJCbottom
μModule
JESD51-12
FEA
JESD51-9
Test Boards for Area
Array Surface Mount Package Thermal Measurements
µModule
3 θJCtop
JESD51-12
Guidelines for Reporting and Using Electronic Package
Thermal Information
μModule
θJCbottom
μModule
FEA
4 θJB
FEA
μModule
θJCbottom
/
2
JESD 51-9
17
JESD 51-12
µModule
µModule
4
1 θJA
1
JESD51-12
4
μModule
JESD 51-9
4641fe
38
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—熱に関する検討事項および出力電流のディレーティング
100%
θJCtop
µModule
JEDEC
θJCbottom
JEDEC 3
FEA
LTM4641
4
LTM4641
FEA
JESD51-12
18 19 20
1
θ
6V 3.3V 1.5V
21
42
FEA
LTM4641
PCB
LTM4641
θJA
2
JSED 51-9
LTM4641
JESD 51-12
DC1543
JUNCTION-TO-AMBIENT RESISTANCE (JESD 51-9 DEFINED BOARD)
JUNCTION-TO-CASE (TOP)
RESISTANCE
JUNCTION
CASE (TOP)-TO-AMBIENT
RESISTANCE
JUNCTION-TO-BOARD RESISTANCE
JUNCTION-TO-CASE
CASE (BOTTOM)-TO-BOARD
(BOTTOM) RESISTANCE
RESISTANCE
AMBIENT
BOARD-TO-AMBIENT
RESISTANCE
4641 F17
µMODULE DEVICE
17 JESD51-12
4641fe
詳細：www.linear-tech.co.jp/LTM4641
39
LTM4641
アプリケーション情報—熱に関する検討事項および出力電流のディレーティング
1.5V8A
96mm87mm1.6mm
4
FR4 PCB
2
1.205
1
3
10A
20
3.1W
3
120C
39C
θJA
40C
6V 3.3V
7
6V
1.5V
8
LTM4641
3
BGA
40°Cまで
1.00
50°C
1.05
60°C
1.10
70°C
1.15
80°C
1.20
90°C
1.25
100°C
1.30
110°C
1.35
120°C
1.40
120C
120C
38
81C
8A
36V
3.1W
3.74W
6
4 5 6
3.3V
4 5 6
1.5V
81C
3.74W
81C
10.4C/W
1.5V8A
36V
4641fe
40
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—熱に関する検討事項および出力電流のディレーティング
6
8
7
4.5
4.0
5
3.5
5
4
3
2
36VIN
24VIN
12VIN
1
0
0
1
3 4 5 6 7 8
OUTPUT CURRENT (A)
2
9
4
POWER LOSS (W)
POWER LOSS (W)
3
2
36VIN
24VIN
12VIN
6VIN
1
0
10
0
1
3 4 5 6 7 8
OUTPUT CURRENT (A)
2
4641 F18
2.0
1.5
36VIN
24VIN
12VIN
6VIN
1.0
0.5
0
10
10
9
9
5
4
3
2
400LFM
200LFM
0LFM
0
40
50
8
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
0
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
40
50
22 VIN
5
4
3
2
0
10
9
MAXIMUM LOAD CURRENT (A)
4
3
2
400LFM
200LFM
0LFM
1
0
40
50
8
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
0
40
50
12V VOUT 6V
fSW 660kHz
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
36V VOUT 6V
fSW 660kHz
8
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
4146 F24
24 VIN
50
23 VIN
9
5
40
24V VOUT 6V
fSW 660kHz
10
6
400LFM
200LFM
0LFM
4146 F23
9
8
0
40
50
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
4146 F25
25 VIN
24V VOUT 6V
fSW 660kHz
10
6
10
7
9
8
4146 F22
12V VOUT 6V
fSW 660kHz
8
7
1
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
4146 F21
21 VIN
MAXIMUM LOAD CURRENT (A)
MAXIMUM LOAD CURRENT (A)
10
6
3 4 5 6 7
OUTPUT CURRENT (A)
20 1.5V
fSW 315kHz
FCB
SGND
9
8
2
4641 F20
19 3.3V
fSW 360kHz
FCB
SGND
7
1
0
10
1
MAXIMUM LOAD CURRENT (A)
2.5
4146 F19
18 6V
fSW 660kHz
FCB
SGND
MAXIMUM LOAD CURRENT (A)
9
3.0
MAXIMUM LOAD CURRENT (A)
POWER LOSS (W)
6
4146 F26
26 VIN
36V VOUT 6V
fSW 660kHz
4641fe
詳細：www.linear-tech.co.jp/LTM4641
41
LTM4641
10
10
9
9
9
8
8
8
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
0
40
50
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
0
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
40
50
4
3
2
6V VOUT 3.3V
fSW 360kHz
28 VIN
0
12V VOUT 3.3V
fSW 360kHz
9
8
8
4
3
2
400LFM
200LFM
0LFM
0
40
50
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
0
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
40
50
8
7
6
5
4
3
2
0
9
8
8
8
3
2
400LFM
200LFM
0LFM
1
0
40
50
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
0
40
50
24V VOUT 3.3V
fSW 360kHz
50
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
12V VOUT 3.3V
fSW 360kHz
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
4146 F33
33 VIN
MAXIMUM LOAD CURRENT (A)
9
MAXIMUM LOAD CURRENT (A)
10
9
4
40
32 VIN
10
5
400LFM
200LFM
0LFM
4146 F32
6V VOUT 3.3V
fSW 360kHz
10
6
24V VOUT 3.3V
fSW 360kHz
4146 F31
31 VIN
36V VOUT 3.3V
fSW 360kHz
7
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
1
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
4146 F30
30 VIN
MAXIMUM LOAD CURRENT (A)
10
9
5
50
29 VIN
10
6
40
4146 F29
9
7
400LFM
200LFM
0LFM
4146 F28
MAXIMUM LOAD CURRENT (A)
MAXIMUM LOAD CURRENT (A)
5
10
1
MAXIMUM LOAD CURRENT (A)
7
6
1
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
4146 F27
27 VIN
MAXIMUM LOAD CURRENT (A)
10
MAXIMUM LOAD CURRENT (A)
MAXIMUM LOAD CURRENT (A)
アプリケーション情報—熱に関する検討事項および出力電流のディレーティング
0
40
50
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
4146 F34
34 VIN
36V VOUT 3.3V
fSW 360kHz
4146 F35
35 VIN
6V VOUT 1.5V
fSW 315kHz
4641fe
42
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
10
9
9
9
8
8
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
50
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
0
40
50
12V VOUT 1.5V
fSW 315kHz
37 VIN
8
MAXIMUM LOAD CURRENT (A)
9
8
7
6
5
4
3
400LFM
200LFM
0LFM
40
50
3
2
400LFM
200LFM
0LFM
40
50
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
38 VIN
10
0
4
4146 F38
24V VOUT 1.5V
fSW 315kHz
9
1
5
4146 F37
10
2
6
0
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
4146 F36
36 VIN
8
7
1
7
5
4
3
2
0
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
36V VOUT 1.5V
fSW 315kHz
6
400LFM
200LFM
0LFM
1
40
50
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
4146 F39
39 VIN
4146 F40
40 VIN
6V VOUT 1.5V
fSW 315kHz
10
10
9
9
8
MAXIMUM LOAD CURRENT (A)
40
MAXIMUM LOAD CURRENT (A)
0
MAXIMUM LOAD CURRENT (A)
10
MAXIMUM LOAD CURRENT (A)
10
MAXIMUM LOAD CURRENT (A)
MAXIMUM LOAD CURRENT (A)
アプリケーション情報—熱に関する検討事項および出力電流のディレーティング
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
0
40
50
1.5V
8
7
6
5
4
3
2
400LFM
200LFM
0LFM
1
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
12V VOUT
fSW315kHz
0
40
50
60 70 80 90 100 110 120
AMBIENT TEMPERATURE (°C)
4146 F41
41 VIN
24V VOUT 1.5V
fSW 315kHz
4146 F42
42 VIN
36V VOUT 1.5V
fSW 315kHz
4641fe
詳細：www.linear-tech.co.jp/LTM4641
43
LTM4641
アプリケーション情報—熱に関する検討事項および出力電流のディレーティング
4 6V
660kHz
VIN
θJAC/W
LFM
図 21 ～図 23
12V、24V、36V
図 18
0
なし
10.1
図 21 ～図 23
12V、24V、36V
図 18
200
なし
8.2
図 21 ～図 23
12V、24V、36V
図 18
400
なし
6.8
図 24 ～図 26
12V、24V、36V
図 18
0
BGAヒートシンク
8.1
図 24 ～図 26
12V、24V、36V
図 18
200
BGAヒートシンク
6.5
図 24 ～図 26
12V、24V、36V
図 18
400
BGAヒートシンク
5.5
5 3.3V
360kHz
VIN
θJAC/W
LFM
図 27 ～図 30
6V、12V、24V、36V
図 19
0
なし
10.4
図 27 ～図 30
6V、12V、24V、36V
図 19
200
なし
8.4
図 27 ～図 30
6V、12V、24V、36V
図 19
400
なし
7.1
図 31 ～図 34
6V、12V、24V、36V
図 19
0
BGAヒートシンク
8.6
図 31 ～図 34
6V、12V、24V、36V
図 19
200
BGAヒートシンク
6.8
図 31 ～図 34
6V、12V、24V、36V
図 19
400
BGAヒートシンク
5.8
6 1.5V
315kHz
VIN
θJAC/W
LFM
図 35 ～図 38
6V、12V、24V、36V
図 20
0
なし
10.3
図 35 ～図 38
6V、12V、24V、36V
図 20
200
なし
8.4
図 35 ～図 38
6V、12V、24V、36V
図 20
400
なし
7.2
図 39 ～図 42
6V、12V、24V、36V
図 20
0
BGAヒートシンク
9.0
図 39 ～図 42
6V、12V、24V、36V
図 20
200
BGAヒートシンク
7.0
図 39 ～図 42
6V、12V、24V、36V
図 20
400
BGAヒートシンク
5.8
7
Web
Wakefield Engineering
LTN20069
www.wakefield.com
Aavid Thermalloy
375424B00034G
www.aavid.com
8
Web
Chomerics
T411
www.chomerics.com
4641fe
44
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—出力容量の表
9
45
46
COUTMLCC
VOUT
≤ 3.3V
AVX
太陽誘電
TDK
> 3.3V
AVX
太陽誘電
TDK
VOUT
V
VINV
COUTBULK
12106D107MAT2A（100µF、6.3V、ケース・サイズ：1210） 三洋電機 POSCAP 6TPE680MI
（680µF、6.3V、ESR：18mΩ、ケース・サイズ：D4）
12066D226MAT2A（22µF、6.3V、ケース・サイズ：1206）
JMK325BJ107MM-T（100µF、6.3V、ケース・サイズ：1210）
JMK316BJ226ML-T（22µF、6.3V、ケース・サイズ：1206）
C3225X5R0J107MT（100µF、6.3V、ケース・サイズ：1210）
C3216X5R0J226MT（22µF、6.3V、ケース・サイズ：1206）
1206YD226MAT2A（22µF、16V、ケース・サイズ：1206）
三洋電機 POSCAP 10TPF150ML
（150µF、10V、ESR：15mΩ、ケース・サイズ：D3L）
LMK316BJ476ML-T（47µF、10V、ケース・サイズ：1206）
EMK316BJ226ML-T（22µF、16V、ケース・サイズ：1206）
C3216X5R1A476M（47µF、10V、ケース・サイズ：1206）
C3216X5R1C226M（22µF、16V、ケース・サイズ：1206）
RSET1A
RfSET RSET1B RSET2
M Ω k Ω k Ω
0A
5A 0A
mVPK-PK
CIN
CIN*
COUT2
COUT1
680µF
–
5
60
130
25
0.9
5、12、24、36 0.931
4.12
–
2×10µF
100µF
3×22µF
0.9
CFFA
CFFB A/ µs
0A 5AmV
µs
5、12、24、36 0.931
4.12
–
2×10µF
100µF
4×100µF
–
–
5
60
140
25
1
5、12、24、36
1.00
5.49
–
2×10µF
100µF
3×22µF
680µF
–
5
65
135
25
1
5、12、24、36
1.00
5.49
–
2×10µF
100µF
4×100µF
–
–
5
70
150
25
1.2
5、12、24、36
1.13
8.2
–
2×10µF
100µF
3×22µF
680µF
–
5
70
140
25
1.2
5、12、24、36
1.13
8.2
–
2×10µF
100µF
4×100µF
–
–
5
80
170
30
1.5
5、12、24、36
1.43
8.2
33.2
2×10µF
100µF
3×22µF
680µF
–
5
75
155
30
1.5
5、12、24、36
1.43
8.2
33.2
2×10µF
100µF
4×100µF
–
220pF
5
90
190
30
1.8
5、12、24、36
2.00
8.2
16.5
2×10µF
100µF
3×22µF
680µF
–
5
80
170
40
1.8
5、12、24、36
2.00
8.2
16.5
2×10µF
100µF
3×100µF
–
220pF
5
100
215
30
2.5
5、12、24、36
5.76
8.2
7.5
2×10µF
100µF
3×22µF
680µF
–
5
100
230
50
2.5
5、12、24、36
5.76
8.2
7.5
2×10µF
100µF
3×100µF
–
220pF
5
140
290
30
3.3
5、12、24、36
–
8.2
4.7
2×10µF
100µF
3×22µF
680µF
–
5
140
275
60
3.3
5、12、24、36
–
8.2
4.7
2×10µF
100µF
3×100µF
–
100pF
5
200
420
30
5
12、24、36
–
8.2
2.61
2×10µF
100µF
2×22µF
150µF 220pF
5
220
450
50
5
12、24、36
–
8.2
2.61
2×10µF
100µF
3×47µF
100pF
5
250
570
30
6
12、24、36
–
8.2
2.05
2×10µF
100µF
2×22µF
150µF 220pF
5
240
500
55
6
12、24、36
–
8.2
2.05
2×10µF
100µF
3×47µF
5
300
660
30
–
–
100pF
* バルク容量はVIN の入力インピーダンスが非常に低い場合のオプション。
4641fe
詳細：www.linear-tech.co.jp/LTM4641
45
LTM4641
アプリケーション情報—安全およびレイアウト上の参考情報
1
LTM4641
VIN
2
MLCCC
OUTMLCC
COUTMLCC
VOUT
2
•
LTM4641
2
•
/
•
SGND
SGND
LTM4641
43
44
45
46
•
http://www.linear.com/docs/40146
•
SGND
A3 B1 B3 C1 C4
1
K1 K3 L3
M1
PCB
SGND
M1
SGND
2
1
A1
M1
A1
A1
•
DC1543
linear.com/demo
•
http://www.
M3
SGND
GND
2
GND
BGA
LTM4641
GND
GND
SGND
• SGND
PCB
SGND
GND
•
GND
GND
4
• VINH
VOUT
2
PCB
LTM4641
56
66
GND
•
VINH
GND
VOUT
LTM4641
1 MSP
2 VINH
GND
GND
VINH MSP
LTM4641 VINH
MSP
LTM4641
GND
GND
GND
PCB
VOUT
GND
VOSNS+
VOSNS–
4641fe
46
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
アプリケーション情報—安全およびレイアウト上の参考情報
•
VOUT/GND
CFFA CFFB CCMA CCMB
RSET1A RSET1B
5
D
CDM
DC1543
3
•
RSET2
LTM4641
PCB
64
IC
≥10Ω
PCB
GND
μModule
ICT
43
45
LTM4641
44
46
LTM4641
詳細：www.linear-tech.co.jp/LTM4641
4641fe
47
LTM4641
標準的応用例
VIN
4V TO 38V
(4.5V START-UP)
+
CIN(BULK)
50V
RfSET
2M
CIN(MLCC)
10µF
50V
×2
VINL
VING VINGP VINH
SW
VOUT
COUT(MLCC)
47µF
10V
×6
RSET1A
8.2k
CROWBAR
fSET
UVLO
HYST
FCB
LATCH
VORB+
VOSNS+
LTM4641
INTVCC
DRVCC
VOSNS–
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
IOVRETRY
OVLO
RUN
TRACK/SS
TMR
COMP SGND
RSET2
16.4k
RSET1B
8.2k
LOAD
LOCAL HIGH
FREQUENCY
DECOUPLING
GND
CTMR
N/U
CSS
4.7nF
VOUT
1.8V
10A
4641 F45
SGND CONNECTS TO GND INTERNAL TO MODULE. KEEP SGND
ROUTES/PLANES SEPARATE FROM GND ON MOTHERBOARD
45 VIN 4V
4.5V START-UP
OPERATION
UP TO 38VIN
+
38V LTM4641
1.8V/10A
MSP
CIN(MLCC)
10µF
50V
×2
CIN(BULK)
100µF
50V
VING VINGP VINH
VINL
SW
VOUT
fSET
UVLO
HYST
FCB
LATCH
+
VOSNS
LTM4641
VOSNS–
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
IOVRETRY
OVLO
RUN
TRACK/SS
TMR
COMP SGND
RSET2
4.7k
GND
CSS
22nF
100µF
6.3V
×3
RSET1A
8.2k
VORB+
INTVCC
DRVCC
CFFA
100pF
MCB
CROWBAR
VOUT
3.3V
10A
RSET1B
8.2k
LOAD
LOCAL HIGH
FREQUENCY
DECOUPLING
CFFB
100pF
MCB: NXP PSMN5R0-30YL
MSP: NXP PSMN7R0-60YS
4641 F46
SGND CONNECTS TO GND INTERNAL TO MODULE. KEEP SGND
ROUTES/PLANES SEPARATE FROM GND ON MOTHERBOARD
46 3.3V
VIN < 4.8V
10A
38V
VIN
11
UVLO
/
LTM4641
4641fe
48
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
標準的応用例
R1
20k
4.5V START-UP
OPERATION UP TO 28VIN
CONTINUOUS, TRANSIENT
PROTECTED TO 80VIN
+
CIN(BULK)
100µF
100V
MSP
CIN(MLCC)
10µF
100V
×2
D1
36V
2%
R2
8.25k
5V
RfSET
1M
VING VINGP
VINL
D2 Enables Detection
of VIN UVLO Falling
D2
RBOV
29.4k
VINH
SW
VOUT
fSET
OUT
LT®3010-5
SHDN
SENSE
GND
VORB+
+
VOSNS
LTM4641
VOSNS
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
OVLO
RUN
TRACK/SS
TMR
CSS
1nF
D2: CENTRAL SEMI CMMSH1-100G
MCB: NXP PSMN5R0-30YL
MSP: NXP PSMN028-100YS
RT1: MURATA NCP15WM474J03RC
COMP SGND
LOCAL HIGH
FREQUENCY
DECOUPLING
LOAD
MSP and Switching Action Are Temporarily
Latched Off When a Module Overtemperature
or Output Overvoltage (OOV) Condition is
Detected--Additionally, the Crowbar MOSFET MCB
is Turned On to Protect the Load Upon OOV Detection.
Autonomous Restart Attempts Occur in 9 Second
Intervals When Conditions Return to Normal
GND
CTMR
1µF
VOUT
1V
10A
RSET1A
5.49k
RSET1B
5.49k
–
INTVCC
DRVCC
IOVRETRY
Switching Action Is
Temporarily Latched Off if
VIN Exceeds 80V; Autonomous
Restart Attemps Occur in
9 Second Intervals When Input
Voltage Returns Below 80V. Note
LT3010-5 is Rated for 80V, Absolute
Maximum. See Note 1.
47 1V
TMR
5V
LATCH
HYST
FCB
100µF
6.3V
×4
MCB
CROWBAR
UVLO
R3
2.7M
VIN
RROV
4.7M
When VIN Exceeds ~36V, D1 Ensures MSP Is Operated
in Its Linear Region and Provides Rudimentary Surge
Ride-Through Protection for LTM4641.
Optional: RT1, R1, R2, R3.To Enable RT1’s Detection of
Thermal Overstress in MSP During Sustained Input Voltage
Surge Events, Place RT1 in Extremely Close Proximity to
MSP in PCB Layout. Experimentally Determine the Vaules
of R1, R2 and R3 That Yield Desired Overtemperature
Shutdown Inception and Restart Recovery Thresholds
Consistent with MSP’s Rated Operating Junction
Temperature and Safe Operating Area
RT1
NTC
4641 F47
SGND CONNECTS TO GND INTERNAL TO MODULE. KEEP SGND
ROUTES/PLANES SEPARATE FROM GND ON MOTHERBOARD
10A
INTVCC
LTM4641
80V
VIN
2
VIN
20V/DIV
VINH
20V/DIV
VOUT 20mV/DIV
AC-COUPLED
VINL/INTVCC/DRVCC/LATCH
5V/DIV
2ms/DIV
48 VOUT
1V10A
47
4641 F48
80V
VIN
4641fe
詳細：www.linear-tech.co.jp/LTM4641
49
LTM4641
標準的応用例
3.3VIN NOMINAL
3VIN RISING START-UP
2.3VIN FALLING SHUTDOWN
+
MSP
CIN(MLCC)
47µF
6.3V
×2
CIN(BULK)
5V
LOW POWER BIAS
<50mA PEAK
RfSET
360k
RTUV
150k
RBUV
30.9k
VINL
VING VINGP VINH
SW
RHYST
1M
MCB
CROWBAR
fSET
UVLO
LATCH
RSET1A
4.12k
VORB+
HYST
FCB
LTM4641
100k
VOSNS+
VOSNS–
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
INTVCC
DRVCC
IOVRETRY
OVLO
RUN
TRACK/SS
TMR
COMP SGND
VOUT
0.9V
100µF 10A
6.3V
×4
VOUT
RSET1B
4.12k
LOAD
LOCAL HIGH
FREQUENCY
DECOUPLING
MCB: NXP PH2625L
MSP: NXP PSMN013-30LL
GND
CSS
4.7nF
4641 F49
SGND CONNECTS TO GND INTERNAL TO MODULE, KEEP SGND
ROUTES/PLANES SEPARATE FROM GND ON MOTHERBOARD
49 VIN
DRVCC
3.3V
VOUT
0.9V10A
LTM4641 VINL INTVCC
5V
VIN
1V/DIV
VOUT
1V/DIV
HYST
5V/DIV
PGOOD
5V/DIV
4ms/DIV
50
49
VIN 3.3V
UVLO
4641 F50
VOUT
2Ω
4641fe
50
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
標準的応用例
LDO Losses in the LTM4641 Can Be Greatly Reduced When an Auxilliary ~5V to 6V Source (VAUX) Is Available to
Drive DRVCC Through a Schottky Diode as Shown (D1c). When LTM4641 Is Configured to Produce ~5VOUT to 6VOUT,
its Output Can Be VAUX. Provide a Current Path to VINL from VIN and INTVCC/DRVCC Whenever Overdriving INTVCC/DRVCC
with VAUX–Accomplished Here with D1a and D1b
VAUX
VIN
8.5V TO 38V
(10V START-UP)
+
CIN(MLCC)
10µF
50V
×2
CIN(BULK)
a
c
D1
CVINL
0.1µF
50V
b
RTUV
294k
VINL
RHYST
1M
RBUV
15.8k
D2
VING VINGP VINH
D1, D2: CENTRAL SEMI CMKSH2-4LR
SOT-363 PACKAGE
VORB+
HYST
FCB
LTM4641
51
5V
10A
D2
INTVCC
TA 25C
53
VOUT
D1c
51
6V
10A
D2
INTVCC
TA 25C
U1
U1
DRVCC
DRVCC
VOSNS+
RSET2
~2.05k TO 2.61k
VOSNS–
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
TRACK/SS
TMR
CSS
47nF
52
VOUT
D1c
COUT(BULK)
150µF
10V
LATCH
RUN
VINL
VOUT
CROWBAR
fSET
UVLO
INTVCC
DRVCC
IOVRETRY
OVLO
CDRVCC
2.2µF
51 INTVCC/DRVCC
SW
COMP SGND
GND
~5VOUT
TO 6VOUT
UP TO 10A
COUT(MLCC)
47µF
10V
×2
RSET1A
8.2k
RSET1B
8.2k
LOAD
4641 F51
SGND CONNECTS TO GND INTERNAL TO MODULE, KEEP SGND
ROUTES/PLANES SEPARATE FROM GND ON MOTHERBOARD
INTVCC
52
54
VIN
36V
54
51
VOUT 5V
10A
INTVCC/DRVCC
U1
VOUT 5V
D1c
TA 25C
VIN
36V
VIN
36V
55
51
VOUT 6V
10A
INTVCC/DRVCC
U1
VOUT 6V
D1c
TA 25C
VIN
36V
4641fe
詳細：www.linear-tech.co.jp/LTM4641
51
LTM4641
標準的応用例
4.5VIN START-UP
OPERATION UP TO 38V
AND DOWN TO 4V
CIN(BULK)
100µF
50V
×2
MSP
CIN(MLCC)
10µF
50V
×4
RfSET1
750k
1
VINL
VING VINGP VINH
SW
VOUT
CROWBAR
fSET
UVLO
HYST
FCB
LATCH
VORB+
VOSNS+
U1
LTM4641
INTVCC
DRVCC
VOSNS–
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
IOVRETRY
OVLO
1
RUN ENABLE
RUN
TRACK/SS
TO SYSTEM µP
(OPTIONAL)
FAULT INDICATOR
CSS
22nF
TMR COMP
CTMR1
N/U
LATCHOFF RESET
RfSET2
750k
ALTERNATIVELY, CONNECT LATCH
TO INTVCC AND INSTALL CTMR1,
CTMR2, CTMR3 AND CTMR4 TO SET
1V OUTPUT FOR TIMED
AUTONOMOUS RESTART AFTER
FAULT SHUTDOWN EVENTS
2
MCB: NXP PSMN5R0-30YL
MSP: NXP PSMN3R0-60BS
VINL
SGND
VOUT
1V
40A
CFF1
100pF
CMLCC(OUT)
100µF
6.3V
×12
RSET1A
1.37k
RSET1B
1.37k
CDM1
10pF
LOAD
LOCAL HIGH
FREQUENCY
DECOUPLING
CFF2
100pF
1
GND
1
1
PULL LATCH NORMALLY LOW FOR
LATCHOFF RESPONSE TO OUTPUT
OVERVOLTAGE AND OVERTEMPERATURE EVENTS. PULL
LATCH HIGH TO RESTART 1V OUTPUT
MCB
1
VING VINGP VINH
SW
VOUT
CROWBAR
fSET
UVLO
HYST
FCB
LATCH
VORB+
VOSNS+
U2
LTM4641
INTVCC
DRVCC
VOSNS–
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
IOVRETRY
OVLO
2
RUN
TRACK/SS
TMR
COMP
CTMR2
N/U
SGND
CDM2
10pF
2
GND
2
2
RfSET3
750k
3
VINL
VING VINGP VINH
SW
VOUT
CROWBAR
fSET
UVLO
HYST
FCB
LATCH
VORB+
VOSNS+
U3
LTM4641
INTVCC
DRVCC
VOSNS–
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
IOVRETRY
OVLO
3
RUN
TRACK/SS
TMR
COMP
CTMR3
N/U
SGND
CDM3
10pF
3
GND
3
3
RfSET4
750k
4
VINL
VING VINGP VINH
SW
VOUT
CROWBAR
fSET
UVLO
HYST
FCB
LATCH
VORB+
VOSNS+
U4
LTM4641
INTVCC
DRVCC
VOSNS–
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
IOVRETRY
OVLO
4
RUN
TRACK/SS
TMR
CTMR4
N/U
COMP
SGND
CDM4
10pF
4
GND
4
4
4641 F56
U1, U2, U3 AND U4 SGND ( 1, 2, 3, 4) CONNECT TO GND INTERNAL TO THEIR RESPECTIVE MODULES. KEEP MODULE
SGND ROUTES/PLANES SEPARATE FROM OTHER MODULES AND FROM GND ON MOTHERBOARD
56
38V
VIN
4
LTM4641
1V
/40A
57
4641fe
52
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
標準的応用例
MODULE OUTPUT CURRENT (A)
12
10
8
6
4
2
U1 OUTPUT CURRENT
U2 OUTPUT CURRENT
U3 OUTPUT CURRENT
U4 OUTPUT CURRENT
0
–2
8
16
24
32
TOTAL OUTPUT CURRENT (A)
0
40
4641 F57
57
OPERATION
UP TO 32.8VIN
4.5V START-UP
+
CIN(BULK)
50V
4
CIN(MLCC)
10µF
50V
×4
LTM4641
56
VING VINGP VINH
VINL
SW
VOUT
CROWBAR
LATCH
VORB+
VOSNS+
U1
LTM4641
INTVCC
DRVCC
VOSNS–
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
IOVRETRY
OVLO
RUN
TRACK/SS
TMR COMP
SGND
D1: CENTRAL SEMI CMPSH1-4LE
RSET1A
8.2k
RSET2 RSET1B
2.46k 8.2k
COUT(MLCC)
47µF
10V
×4
SGND CONNECTS TO GND INTERNAL TO MODULE, KEEP SGND
ROUTES/PLANES SEPARATE FROM GND ON MOTHERBOARD
32.8V
VIN
VOUT
LOCAL HIGH
FREQUENCY
DECOUPLING
LOAD
D1
GND
CSS
10nF
58
28V
FOR MORE INFORMATION ABOUT CONFIGURING STEP-DOWN BUCK
CONVERTERS AS BUCK-BOOST CONVERTERS, FOR GENERATING
NEGATIVE VOUT, SEE http://www.linear.com/docs/39881
fSET
UVLO
HYST
FCB
100k
VIN
–5.2V
10A
VOUT
–5.2V AT
UP TO 10A
4641 F58
59
4641fe
詳細：www.linear-tech.co.jp/LTM4641
53
LTM4641
標準的応用例
VIN 10V/DIV
HYST 2V/DIV
PGOOD 2V/DIV
VOUT 2V/DIV
*
20ms/DIV
59 VIN
VF
*D1
4.5V < VIN < 15V
4641 F59
58
VOUT
MSP
+
CIN(MLCC)
22µF
25V
×2
CIN(BULK)
100µF
25V
RfSET
1.13M
ADDITIONAL
FAULT INDICATOR
VINL
VING VINGP VINH
SW
VDD33
TO UPSTREAM
SYSTEM ENABLE
LATCH
VORB+
VOSNS
LTM4641*
VOSNS–
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
VIN_EN
PMBus
INTERFACE
WRITE PROTECT
TO/FROM
OTHER
LTC2978s
TRACK/SS
SDA
LTC2978**
SCL
ALERT
VDACPO
CONTROL0
VSENSEPO
VSENSEMO
WP
VDACMO
FAULTOO
SHARE_CLK
GND
RUN
PWRGD
WDI/RESET
ASELO
TMR COMP
SGND
100µF
6.3V
×4
LATCHOFF
RESET R
SET1A
8.2k
+
VIN_SNS
VOUT_EN0
MCB
CROWBAR
IOVRETRY
OVLO
VPWR
VOUT
1.2V NOMINAL
UP TO 10A OUTPUT
VOUT
fSET
UVLO
HYST
FCB
INTVCC
DRVCC
3.3V†
500Ω
RSET1B
8.2k
R30
35.7k
LOAD
LOCAL HIGH
FREQUENCY
DECOUPLING
MSP: NXP PSMN017-30LL
MCB: NXP PSMN5R0-30YL
GND
CSS
4.7nF
TO µP RESET INPUT
WATCHDOG TIMER INTERRUPT
ASEL1
*LTM4641 SGND CONNECTS TO GND INTERNAL TO MODULE.
KEEP SGND ROUTES/PLANES SEPARATE FROM GND ON MOTHERBOARD
**ONLY ONE OF EIGHT LTC2978 CHANNELS SHOWN. LTC2978 PULL-UPS,
BYPASSING COMPONENTS, AND SOME PINS NOT SHOWN. FOR DETAILS
OF LTC2978 IMPLEMENTATION, SEE LTC2978 DATA SHEET
†LTC2978 MAY BE POWERED FROM EITHER AN EXTERNAL 3.3V
SUPPLY OR THE SYSTEM BUS
60
VOUT
I 2C
LTM4641
LTC2978
VOUT
11%
4641fe
54
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
標準的応用例
VOUT
200mV/DIV
VOUT
200mV/DIV
VDACPO
500mV/DIV
SDA, SCL
2V/DIV
VDACPO
500mV/DIV
SDA, SCL
2V/DIV
20ms/DIV
61a
PMBus
0x01 0x80→0xA8
20ms/DIV
H61b
PMBus
0x01
4641 F61b
0xA8→0x80
VOUT
200mV/DIV
VOUT
200mV/DIV
VDACPO
500mV/DIV
SDA, SCL
2V/DIV
VDACPO
500mV/DIV
SDA, SCL
2V/DIV
20ms/DIV
61c
4641 F61a
PMBus
0x01
4641 F61c
0x80→0x98
20ms/DIV
L61d
61 I2C
LTC2978
LTM4641 VOUT
VOUT_COMMAND0x21
1.20V VOUT_MARGIN_HIGH
0x25
PMBus
0x01
4641 F61d
0x98→0x80
H/L
60
VIN
1.32V VOUT_MARGIN_LOW
0x26
12V
1.08V
4641fe
詳細：www.linear-tech.co.jp/LTM4641
55
56
詳細：www.linear-tech.co.jp/LTM4641
RBOV
RMOV
RBUV
RHYST
Output Voltage
Power Good Indicator
CSS
COVPGM
Output Enable Pin
>2V or Floating = On
<0.8V = Off
Optional Adjustment of Output
Overvoltage Threshold (Default
Internal Setting: 11% Above
Nominal)
RBOVPGM
RTOVPGM
Recommended
Soft-Start or Rail Tracking
5.3V Internal VCC
LDO Off of VINL
Internal Control
FET Driver Bias Input
Loop Compensation
CTMR Optional Pulse-Skipping
Operation for Light Load
Efficiency
Input and Output
Optional Programmable
Power-On Reset and OV and OT Latch Reset
Timeout Delay Time
Programmable OT Shutdown
Behavior: Latchoff vs Hysteretic
Restart
Analog Temperature Output
Indicator and Overtemperature
(OT) Protection
Optional Programming
of Nonlatching
and Latching Input
Overvoltage (OV)
Thresholds
RTOV
VIN
RTUV
VIN
1M
666mVNOM
OT
INTERNAL
COMP
POR/Timeout
Delay Timer Circuit
+
*
–
DRUV
+
*
–
+
*
–
IOV
+
*
–
IUV
IOVR
+
*
–
SET
SET
Q
Q
RST
SET* Q
RST
*
RST
*
*
MHYST
POR/Timeout
Circuit Output
10k
INTVCC
62
*OSC, REF, COMPARATORS, OP AMPS AND DIGITAL GATES SHOWN
OPERATE FROM INTVCC/SGND RAILS
SGND CONNECTS TO GND INTERNAL TO MODULE, KEEP SGND ROUTES/PLANES
SEPARATE FROM GND ON MOTHERBOARD
RUN
OVPGM
499k
4µF
10k
499k
0.5V
OSC*
66.5k
1M
REF*
NTC
3.48k
12.1k
SS/TRACK
1VREF
PGOOD
FCB
COMP
DRVCC
INTVCC
LATCH
TMR
OTBH
TEMP
1VREF
OVLO
IOVRETRY
HYST
UVLO
1k
TO E/A
600mVREF
(VFB)
47pF
ION
1.3M
10nF
8.2k
VORB
VOSNS+
8.2k
+
VOSNS–
VORB–
CROWBAR
SGND
GND
VOUT
SW
8.2k
1.5M
10k
2.2µF
VINH
VINGP
VING
VINL
Differential Sense Feedback Path with Redundant
Readback Pins
Remote Sense
Differential
Amplifier
*
8.2k
100pF
+
*
–
OOV
10µF
To VING Pull-Down
MBOT
0.8µH
MTOP
15V
ZENER
VING Turn-on Charge Pump
And Fault/Shutdown Discharge
Circuitry
0.1µF
Fast Output Overvoltage
Comparator
CONSTANT
ON-TIME
VALLEY MODE
SYNCHRONOUS
BUCK CONTROLLER
POWER
CONTROL
ENABLE
SWITCHING
ACTION
+
–
Optional Programming of Input
Undervoltage Lockout and Hystersis
IOUT
CSW
Optional Output
Protection
Crowbar N-Ch
Logic-Level
MOSFET
VOUT
0.6V TO 6V
UP TO 10A
n = number of modules operaing in parallel
(See Figure 66 for example of n = 2 and Figure 56
for example of n = 4.)
Use RSET1A = RSET1 ≤ 8.2k
RSET2 Required for VOUT > 1.2V
RSET2 Not Necessary for VOUT ≤ 1.2V

R
2 •RSET1A 
VOUT = 0.6V  1+n SET1A +
8.2kΩ
RSET2 

4641 F62
COUT(MLCC)
Optional Power RC
Snubber for Reduced
EMI
High Current Path:
Input to SMPS DC/DC Converter Stage
COUT(BULK)
RSET1A
RSET2
Optional Series Pass
Electronic “Circuit Breaker”
N-Ch Protection MOSFET
10V Bias (VGS) Charge Pump and
Discharge Path for Optional
External Series Pass N-Ch FET
MSP
On-Time and Switching Frequency
Adjustment REQUIRED for VOUT ≤ 3V,
Rail Tracking Applications and When
VINL ≠ VINH
VIN
4V TO 38V
(4.5V START-UP)
CIN(MLCC) +
CIN(BULK)
RSET1B
MCB
+
RSW
RfSET
Low Current Path: Power
Control and Logic Bias Input
LTM4641
付録
A
4641fe
INTVCC > 2V, NOM
INTVCC < 2V, NOM
詳細：www.linear-tech.co.jp/LTM4641
INTVCC < 2V, NOM
63
/
4641 F63
INTVCC > 2V, NOM;
AND ANY OF THE FOLLOWING NONLATCHING CONDITONS APPEAR:
1. CUSTOM UVLO INPUT TOO LOW (VUVLO < UVOVTH, ~0.5VTH)
2. NONLATCHING INPUT OVERVOLTAGE (VIOVRETRY > UVOVTH, ~0.5VTH)
3. DRVCC TOO LOW (VDRVCC < DRVCC(UVLO_FALLING), ~3.35VTH)
4. NONLATCHING OVERTEMPERATURE
(OTBH = OPEN CIRCUIT AND VTEMP < OTTH(INCEPTION), ~438mVTH)
AND NO LATCHOFF FAULTS ARE PRESENT:
1. INPUT VOLTAGE O.K. (VOVLO < UVOVTH, ~0.5VTH)
2. CROWBAR O.K. (VCROWBAR < VCROWBAR(TH), ~1.5VTH)
3. TEMPERATURE O.K.
(OTBH = LOW AND VTEMP > OTTH(INCEPTION), ~438mVTH)
UVLO/IOVRETRY/OVLO/CROWBAR/TEMP/DRVCC MONITOR
OUTPUTS HAVE REMAINED CLEAR FOR THE FULL DURATION
OF THE TIMEOUT PERIOD
INTVCC < 2V, NOM
LTM4641 VERIFICATION
OF TIMEOUT PERIOD
EXPIRATION: HOUSEKEEPING
CIRCUITRY HOLDS HYST LOW
(MHYST IS ON) UNTIL AND
UNLESS THE UVLO/IOVRETRY/
OVLO/CROWBAR/TEMP/DRVCC
MONITOR OUTPUTS REMAIN
CLEAR FOR THE FULL DURATION
OF THE TIMEOUT PERIOD, AS SET
BY TMR PIN (CTMR); POWER
STAGE IS OFF; VING IS DISCHARGED
INTVCC > 2V, NOM;
AND ALL OF THE FOLLOWING FAULT FREE CONDITIONS
ARE PRESENT (OR RECENTLY APPEARED, EXITING LATCHOFF):
1. CUSTOM UVLO INPUT O.K. (VUVLO > UVOVTH, ~0.5VTH)
2. NO INPUT OVERVOLTAGE(S)
(VIOVRETRY < UVOVTH AND VOVLO < UVOVTH, ~0.5VTH)
3. CROWBAR INACTIVE (VCROWBAR < VCROWBAR(TH), ~1.5VTH)
4. TEMPERATURE O.K. (VTEMP > OTTH(RECOVER), ~514mVTH)
5. DRVCC ABOVE ITS UVLO
(VDRVCC > DRVCC(UVLO_RISING), ~4.05VTH)
INTVCC > 2V, NOM;
AND ANY OF THE FOLLOWING NONLATCHING CONDITONS APPEAR:
1. CUSTOM UVLO INPUT TOO LOW (VULVO < UVOVTH, ~0.5VTH)
2. NONLATCHING INPUT OVERVOLTAGE (VIOVRETRY > UVOVTH, ~0.5VTH)
3. DRVCC TOO LOW (VDRVCC < DRVCC(UVLO_RISING), ~3.9VTH)
4. NONLATCHING OVERTEMPERATURE
(OTBH = OPEN CIRCUIT AND VTEMP < OTTH(RECOVER), ~514mVTH)
AND NO LATCHOFF FAULTS ARE PRESENT:
1. INPUT VOLTAGE O.K. (VOVLO < UVOVTH, ~0.5VTH)
2. CROWBAR O.K. (VCROWBAR < VCROWBAR(TH), ~1.5VTH)
3. TEMPERATURE O.K.
(OTBH = LOW AND VTEMP > OTTH(RECOVER), ~514mVTH)
LTM4641 PRIMED TO
REGULATE: WAITING
ONLY FOR RUN PIN TO
TRANSISTION HIGH AND
INTVCC TO EXCEED 3.6VNOM;
SWITCHING ACTION NOT
INHIBITED BY HOUSEKEEPING
CIRCUITRY (MHYST IS OFF);
POWER STAGE IS OFF;
VING IS DISCHARGED
INTVCC > 2V, NOM
AND ANY LATCHOFF FAULTS ARE PRESENT:
1. LATCHOFF INPUT OVERVOLTAGE (VOVLO > UVOVTH, ~0.5VTH)
2. CROWBAR ACTIVE (VCROWBAR > VCROWBAR(TH), ~1.5VTH)
3. LATCHOFF OVERTEMPERATURE
(OTBH = LOW AND VTEMP < OTTH(RECOVER), ~514mVTH)
EITHER INTVCC > 3.2V NOM AND RUN = LOW (0.8VTH, MIN)—
OR 2V < INTVCC < 3.2V, NOM— AND ADDITIONALLY,
IN EITHER CASE, ALL OF THE FOLLOWING FAULT FREE
CONDITIONS EXIST:
1. CUSTOM UVLO INPUT O.K. (VUVLO > UVOVTH, ~0.5VTH)
2. NO INPUT OVERVOLTAGE(S)
(VIOVRETRY < UVOVTH AND VOVLO < UVOVTH, ~0.5VTH)
3. CROWBAR INACTIVE (VCROWBAR < VCROWBAR(TH), ~1.5VTH)
4. TEMPERATURE O.K. (VTEMP > OTTH(RECOVER), ~514mVTH)
5. DRVCC ABOVE ITS UVLO
(VDRVCC > DRVCC(UVLO_FALLING), ~3.35VTH)
INTVCC > 3.9V, NOM
AND ALL OF THE FOLLOWING
FAULT FREE CONDITIONS ARE PRESENT:
1. CUSTOM UVLO INPUT O.K. (VUVLO > UVOVTH, ~0.5VTH)
2. NO INPUT OVERVOLTAGE(S)
(VIOVRETRY < UVOVTH AND VOVLO < UVOVTH, ~0.5VTH)
3. CROWBAR INACTIVE (VCROWBAR < VCROWBAR(TH), ~1.5VTH)
4. TEMPERATURE O.K. (VTEMP > OTTH(RECOVER), ~514mVTH)
5. DRVCC ABOVE ITS UVLO
(VDRVCC > DRVCC(UVLO_RISING), ~4.05VTH)
6. RUN > VRUN(ON) (2VTH, MAX)
LTM4641 HOUSEKEEPING
ALIVE AND INHIBITING
SWITCHING ACTION:
HYST IS PULLED LOW
(MHYST IS ON); POWER
STAGE IS OFF; VING IS
DISCHARGED
LATCHOFF IS CLEARED WHEN INTVCC > 2V, NOM
AND LATCH TOGGLES FROM LOGIC LOW
TO HIGH AND NO LATCHOFF FAULTS ARE PRESENT:
1. INPUT VOLTAGE O.K. (VOVLO < UVOVTH, ~0.5VTH)
2. CROWBAR O.K. (VCROWBAR < VCROWBAR(TH), ~1.5VTH)
3. TEMPERATURE O.K.
(OTBH = LOW AND VTEMP > OTTH(RECOVER), ~514mVTH)
INTVCC < 2V, NOM
INTVCC > 2V, NOM AND
LATCH = LOW
TIMEOUT PERIOD
BECOMES RESET
LTM4641 LATCHOFF
CONDITION DETECTED:
HYST IS LATCHED LOW
(MHYST IS ON); POWER
STAGE IS OFF; VING IS
DISCHARGED
INTVCC > 2V, NOM
AND LATCH = LOW
INTVCC < 2V, NOM
LTM4641 TIMEOUT DELAY IMPOSED DURING LATCHOFF:
HOUSEKEEPING CIRCUITRY HOLDS HYST LOW (MHYST IS ON)
UNTIL AND UNLESS ALL LATCHOFF FAULT-MONITOR OUTPUTS
REMAIN CLEAR FOR THE FULL DURATION OF THE TIMEOUT
PERIOD, AS SET BY TMR PIN (CTMR)
/
INTVCC > 3.2V, NOM
AND ALL OF THE FOLLOWING
FAULT FREE CONDITIONS ARE PRESENT:
1. CUSTOM UVLO INPUT O.K. (VUVLO > UVOVTH, ~0.5VTH)
2. NO INPUT OVERVOLTAGE(S)
(VIOVRETRY < UVOVTH AND VOVLO < UVOVTH, ~0.5VTH)
3. CROWBAR INACTIVE (VCROWBAR < VCROWBAR(TH), ~1.5VTH)
4. TEMPERATURE O.K. (VTEMP > OTTH(INCEPTION), ~438mVTH)
5. DRVCC ABOVE ITS UVLO
(VDRVCC > DRVCC(UVLO_FALLING), ~3.35VTH)
6. RUN > VRUN(ON) (2VTH, MAX)
LTM4641 POWER STAGE
SWITCHING ACTION
IS ON: MHYST IS OFF;
VING IS CHARGE PUMPED
ABOVE VINH; CONTROL
LOOP REGULATES VOUT
INTVCC > 2V, NOM
AND ANY OF THE FOLLOWING LATCHOFF FAULTS ARE PRESENT:
1. LATCHOFF INPUT OVERVOLTAGE (VOVLO > UVOVTH, ~0.5VTH)
2. CROWBAR ACTIVE (VCROWBAR > VCROWBAR(TH), ~1.5VTH)
3. LATCHOFF OVERTEMPERATURE
(OTBH = LOW AND VTEMP < OTTH(INCEPTION), ~438mVTH)
INTVCC < 2V, NOM
LTM4641 SHUT DOWN:
HOUSEKEEPING AND
CONTROL SECTIONS
ARE UNBIASED; POWER
STAGE IS OFF; VING IS
DISCHARGED
INTVCC > 2V, NOM AND LATCH = HIGH
AND ANY LATCHOFF FAULT IS PRESENT:
1. INPUT OVERVOLTAGE (VOVLO > UVOVTH, ~0.5VTH)
2. CROWBAR ACTIVE (VCROWBAR > VCROWBAR(TH), ~1.5VTH)
3. LATCHOFF OVERTEMPERATURE
(OTBH = LOW AND VTEMP < OTTH(RECOVER), ~514mVTH)
B
LATCHOFF IS CLEARED WHEN INTVCC > 2V, NOM AND LATCH = HIGH
AND ALL LATCHOFF FAULT-MONITOR OUTPUTS REMAIN OPERATIONALLY
VALID FOR THE FULL DURATION OF THE TIMEOUT PERIOD:
1. INPUT VOLTAGE O.K. (VOVLO < UVOVTH, ~0.5V<)
2. CROWBAR O.K. (VCROWBAR < VCROWBAR(TH), ~1.5VTH)
3. TEMPERATURE O.K. (OTBH = LOW AND VTEMP > OTTH(RECOVER), ~514mVTH)
LTM4641
付録
4641fe
57
LTM4641
付録
C
RfSET
LTM4641
fSET
RfSET
3
VOUT
VOUT
MTOP
LTM4641
3V
VINL
49
1
VINH
RfSET
fSET
45
LTM4641
MOSFET
fSET
RfSET
RfSET
VINL
3
4
MSP
MOSFET
VINH
OUT
MSP
VINL
RfSET fSET
49
VINH
5
≤3V
VIN
VINL
47
VIN
VINL
RfSET
ION
VINL
1.3MΩ
2
46
MTOP
VINH
LTM4641
LTM4641
V
LTM4641
LTM4641
fSET
1.3MΩ
fSET
VINH
VINL
IION
6
PFM
20%
25%
5
MSP
VINL
RfSET
VINH
VINH
MSP
fSET
LTM4641
MSP
RfSET
RDSON
VINH
VINH
0A
VING
MSP
VINH
VIN
TRACK/SS
MSP
RfSET
2
RfSET
ION
3
4641fe
58
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
付録
VINH
POL
0.6V
RfSET
VINH
MSP
47
VINH
fSET
PCB
ION
RSET1A/
RSET1A/RSET1B
RSET1B
VINH
LTM4641
D
0.6V
RSET1A
6V
RSET1B
VOSNS+
CDM
VOSNS–
64
8.2kΩ
VOUT
RSET1B
1.2V
VOUT
8.2kΩ
–0.3V
3V
RSET1A
50cm
CCMA, CCMB: If Appreciable Cable Length Connects the LTM4641’s Output
to the Load (e.g., Through Several Feet of Wire), Leave Provision
for High Frequency Decoupling of Common Mode Ground Noise with
These Capacitors. These Are Not Needed in Purely PCB-Based Designs,
Where the LTM4641 Is Close to the Load
CFFA, CFFB: Feedforward Capacitors
Yeild Improved Transient Response
When Filtering VOUT with Only MLCC
Output Capacitors (COUT(MLCC))
VOUT
LTM4641
CFFA
ICT
TEST
POINT
VORB+
VFB
TO ERROR
AMPLIFIER
+
GND
POL LTM4641
8.2k
8.2k VOSNS+
CDM
8.2k
–
CCMA
TRUE DIFFERENTIAL REMOTE
SENSE AMPLIFIER
VOUT
COUT(BULK)
COUT(MLCC)
RSET1A
RSET2
LOAD
RSET1B
VOSNS–
8.2k
+
VORB–
ICT
TEST
POINT
SGND
CCMB
CFFB
Place All Feedback
Components Local
To The LTM4641
GND
SGND CONNECTS TO GND INTERNAL TO MODULE. KEEP SGND
ROUTES/PLANES SEPARATE FROM GND ON MOTHERBOARD
4641 F064
Route Feedback Signals as
a Differential Pair (or
Twisted Pair if Using Wires).
Sandwich Between Ground
Planes to Form a Protective Shield,
Guarding Against Stray Noise
If Effective Ground Shielding of the Feedback Signals Cannot
Be Implemented, Leave Provision for a Small Capacitor (CDM)
To Attenuate Differential Mode Noise if Necessary
64
4641fe
詳細：www.linear-tech.co.jp/LTM4641
59
LTM4641
付録
1
FCB
C CMA
CCMB
CCMA CCMB
VOSNS+
SGND
SGND
CCMA CCMB
0A
–
VOSNS
F
E
MTOP
H
IION
OV
PGM
• OVPGM
OOV
OVPGM
47pF
OVPGM
FCB
L
MTOP
MBOT
MTOP
MTOP
MBOT
MBOT
MBOT
MBOT
• OVPGM
47pF
499kΩ||1MΩ
15.6μs
OVPGM
0.6V < VOVPGM < 0.9V
OVPGM
OVPGM
1VREF
OOV
OVPGM
MTOP
1VREF
MBOT
9
2A
• OVPGM
1VREF
1VREF/SGND
OVPGM
COVPGM
0A
MBOT
MBOT
OVPGM
65
1VREF
LTM4641
RTOVPGM
OVPGM
COVPGM
SGND
RBOVPGM
4641 F65
65 VOVPGM
OVPGM
4641fe
60
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
付録
OVPGMR
RBOVPGM
100kΩ
0.1%25ppm/C
BOVPGM
OOV
OVPGM
NEW
RBOVPGM =
1
1V – OVPGM(NEW)
(37)
1
–
OVPGM(NEW) • 499kΩ 1MΩ
0.6V < OVPGMNEW < 0.9V
OVPGMNEW
VOVPGM
RTOVPGM
OVPGM
R TOVPGM =
1
1V • (1MΩ||RBOVPGM )
OVPGM(NEW) =
( 499kΩ +1MΩ||R BOVPGM )
RBOVPGM
(38)
(1V – OVPGM(NEW) )
OVPGM
COVPGM
OVPGMNEW
1
–
499kΩ
• (1MΩ||RBOVPGM )
OVPGM
600mV
OVPGM(NEW) =
VFB
1V • (1MΩ||RBOVPGM )
499kΩ||R
(
TOVPGM +1MΩ||RBOVPGM )
OVPGM
RTOVPGM
OOV
COVPGM(NEW) =
15.6µs
OVPGMNEW
R TOVPGM =
1
OVPGM(NEW)
(1V – OVPGM(NEW) )
( 499kΩ||1MΩ||RTOVPGM ||RBOVPGM )
(39)
1
499kΩ
•1MΩ
–
– 47pF
OVPGMNEW
SGND
VOVPGM OOV
1V •1MΩ
OVPGM(NEW) =
( 499kΩ||RTOVPGM +1MΩ)
1VREF
1.8%
(40)
1.5%
1VREF
39
COVPGM
167%
OOV
12mV
OOV
COVPGM
COVPGM =
VOVPGM
2.26%
15.6µs
– 47pF
499kΩ||1MΩ||R
(
TOVPGM )
(44)
666mV
RBOVPGM 100k
25ppm/C
OVPGM
COVPGM 470pF
RTOVPGM 49.9k
0.1%
OVPGM
RTOVPGM 10kΩ
OVPGM
(43)
COVPGM
2μs
OVPGM
(42)
OVPGM(NEW)
OVPERR
VFB
CROWBAR
(41)
H
OVPGM
OVPGM
665mV
OVPGM
DC
4641fe
詳細：www.linear-tech.co.jp/LTM4641
61
LTM4641
付録
•
IC
VINH
SW
•
•
•
• V
VOUT
MCB
CROWBAR
VINH
OUT
MOSFET
MOSFET
MOSFET
LTpowerCAD
LTM4641
DC
LTM4641
56
66
1.5%
OVPGM
MOSFET
VINH
DC1543
SW
4641fe
62
詳細：www.linear-tech.co.jp/LTM4641
LTM4641
パッケージ
10 LTM4641
BGA
ID
A1
ID
SGND
B1
ID
SGND
C1
ID
SGND
ID
ID
D1
VORB+
E1
GND
F1
GND
–
A2
SGND
B2
SGND
C2
SGND
D2
VORB
E2
GND
F2
GND
A3
SGND
B3
SGND
C3
SGND
D3
OTBH
E3
GND
F3
GND
A4
HYST
B4
UVLO
C4
SGND
D4
TMR
E4
GND
F4
GND
A5
TEMP
B5
OVLO
C5
LATCH
D5
RUN
E5
GND
F5
GND
A6
IOVRETRY
B6
GND
C6
1VREF
D6
GND
E6
GND
F6
GND
A7
GND
B7
GND
C7
GND
D7
GND
E7
GND
F7
GND
A8
GND
B8
GND
C8
GND
D8
GND
E8
GND
F8
GND
A9
GND
B9
CROWBAR
C9
VOUT
D9
VOUT
E9
VOUT
F9
GND
A10
GND
B10
OVPGM
C10
VOUT
D10
VOUT
E10
VOUT
F10
GND
A11
GND
B11
GND
C11
VOUT
D11
VOUT
E11
VOUT
F11
GND
A12
GND
B12
GND
C12
VOUT
D12
VOUT
E12
VOUT
F12
GND
ID
ID
ID
+
ID
ID
ID
G1
GND
H1
VOSNS
J1
COMP
K1
SGND
L1
PGOOD
M1
SGND
G2
GND
H2
VOSNS–
J2
fSET
K2
FCB
L2
TRACK/SS
M2
SGND
G3
GND
H3
GND
J3
VINL
K3
SGND
L3
SGND
M3
SGND
G4
GND
H4
GND
J4
DRVCC
K4
INTVCC
L4
GND
M4
GND
G5
GND
H5
GND
J5
GND
K5
GND
L5
GND
M5
GND
G6
GND
H6
GND
J6
GND
K6
GND
L6
GND
M6
GND
G7
GND
H7
GND
J7
GND
K7
VINH
L7
VINH
M7
VINH
G8
GND
H8
GND
J8
GND
K8
VINH
L8
VINH
M8
VINH
G9
GND
H9
GND
J9
GND
K9
VINH
L9
VINH
M9
VING
G10
GND
H10
SW
J10
GND
K10
VINH
L10
VINH
M10
VINGP
G11
GND
H11
GND
J11
GND
K11
GND
L11
VINH
M11
VINH
G12
GND
H12
GND
J12
GND
K12
GND
L12
VINH
M12
VINH
パッケージの写真
4641fe
詳細：www.linear-tech.co.jp/LTM4641
63
0.0
aaa Z
0.630 ±0.025 Ø 144x
4
PIN “A1”
CORNER
E
PACKAGE TOP VIEW
3.1750
3.1750
SUGGESTED PCB LAYOUT
TOP VIEW
1.9050
Y
詳細：www.linear-tech.co.jp/LTM4641
6.9850
5.7150
4.4450
3.1750
1.9050
0.6350
0.0000
0.6350
1.9050
3.1750
4.4450
5.7150
6.9850
X
D
aaa Z
NOM
5.01
0.60
4.41
0.75
0.63
15.00
15.00
1.27
13.97
13.97
0.41
4.00
MAX
5.21
0.70
4.51
0.90
0.66
NOTES
DETAIL B
PACKAGE SIDE VIEW
DIMENSIONS
b1
A
A2
0.46
4.05
0.15
0.10
0.20
0.30
0.15
TOTAL NUMBER OF BALLS: 144
0.36
3.95
MIN
4.81
0.50
4.31
0.60
0.60
DETAIL A
SYMBOL
A
A1
A2
b
b1
D
E
e
F
G
H1
H2
aaa
bbb
ccc
ddd
eee
H1
SUBSTRATE
A1
ddd M Z X Y
eee M Z
DETAIL B
H2
MOLD
CAP
ccc Z
Øb (144 PLACES)
// bbb Z
(Reference LTC DWG # 05-08-1914 Rev A)
144-Lead (15mm × 15mm × 5.01mm)
Z
Package
(Reference LTCBGA
DWG
# 05-08-1914 Rev A)
Z
64
0.6350
0.0000
0.6350
e
b
11
10
9
7
G
6
e
5
PACKAGE BOTTOM VIEW
8
ボールの指定は JESD MS-028 および JEP95 による
TRAY PIN 1
BEVEL
!
3
PACKAGE IN TRAY LOADING ORIENTATION
LTMXXXXXX
µModule
パッケージの行と列のラベルは、
µModule 製品間で異なる可能性がある
各パッケージのレイアウトを確認すること
6. 半田ボールは、
元素構成比がスズ
（Sn）
96.5%、
銀
（Ag）
3.0%、
銅
（Cu）0.5% の合金です。
7
4
2
1
A
B
C
D
E
F
G
H
J
K
L
M
7
SEE NOTES
PIN 1
BGA 144 1112 REV A
ピン #1 の識別マークの詳細はオプションだが、
示された領域内になければならない。
ピン #1 の識別マークはモールドまたはマーキングにすることができる
5. 主データム -Z- はシーティングプレーン
4
3
2. 全ての寸法はミリメートル
NOTES：
1. 寸法と許容誤差は ASME Y14.5M-1994 による
COMPONENT
PIN “A1”
3
SEE NOTES
F
b
12
DETAIL A
パッケージ
1.9050
BGA Package
144-Lead (15mm 15mm 5.01mm)
LTM4641
http://www.linear-tech.co.jp/designtools/packaging/
4641fe
6.9850
5.7150
4.4450
4.4450
5.7150
6.9850
LTM4641
改訂履歴　（改訂履歴は Rev B から開始）
REV
B
2/13
図1を更新。
C
5/13
ビデオのプレイボタンを更新。
D
10/13
特許番号8163643を追加。
図9のタイトルの「図43の回路」を「VIN＝28Vでの図45の回路」に変更。
E
02/14
SnPb BGAパッケージオプションを追加。
15
1、49
1
28
1、3
4641fe
リニアテクノロジー・コー レーションがここで
する
は 確かつ信頼できる のと えておりますが、その使用に関する
は
負いませ 。また、ここに記載された回路 線と 存特許とのいかなる関連について
関 いたしませ 。なお、
の
は
あくまで 参
です。
、変更、 詳細
に追
していない場合があります。最 的な確認は
最新の
データシートでお いいたします。
：www.linear-tech.co.jp/LTM4641
65
LTM4641
標準的応用例
4.5VIN START-UP
OPERATION UP TO 38V
AND DOWN TO 4V
CIN(BULK)
100µF
50V
×2
MSP
CIN(MLCC)
10µF
50V
×4
VINL
RfSET1
750k
VING VINGP VINH
SW
VOUT
1
LATCH
INTVCC
DRVCC
–
VOSNS
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
1
RUN
TRACK/SS
TO SYSTEM µP
(OPTIONAL)
FAULT INDICATOR
CSS
22nF
TMR COMP
CTMR1
N/U
PULL LATCH NORMALLY LOW FOR
LATCHOFF RESPONSE TO OUTPUT
OVERVOLTAGE AND OVERTEMPERATURE EVENTS. PULL
LATCH HIGH TO RESTART 1V OUTPUT
VINL
RfSET2
750k
ALTERNATIVELY, CONNECT LATCH
TO INTVCC AND INSTALL CTMR1 AND
CTMR2 TO SET 1V OUTPUT FOR TIMED
AUTONOMOUS RESTART AFTER
FAULT SHUTDOWN EVENTS
2
LOAD
LOCAL HIGH
FREQUENCY
DECOUPLING
CFF2
100pF
1
GND
1
VING VINGP VINH
SW
VOUT
CROWBAR
fSET
UVLO
HYST
FCB
MCB: NXP PSMN5R0-30YL
MSP: NXP PSMN7R0-60YS
RSET1B
2.74k
CDM1
22pF
1
1
LATCHOFF RESET
SGND
CMLCC(OUT)
100µF
6.3V
×6
RSET1A
2.74k
VORB+
VOSNS+
U1
LTM4641
IOVRETRY
OVLO
RUN ENABLE
MCB
CROWBAR
fSET
UVLO
HYST
FCB
VOUT
1V
20A
CFF1
100pF
LATCH
VORB+
VOSNS+
U2
LTM4641
INTVCC
DRVCC
VOSNS–
VORB–
TEMP
1VREF
OVPGM
OTBH
PGOOD
IOVRETRY
OVLO
2
RUN
TRACK/SS
TMR
CTMR2
N/U
COMP
SGND
CDM2
22pF
2
GND
2
4641 F66
2
U1 AND U2 SGND ( 1, 2) CONNECT TO GND INTERNAL TO THEIR RESPECTIVE MODULES. KEEP MODULE
SGND ROUTES/PLANES SEPARATE FROM OTHER MODULES AND FROM GND ON MOTHERBOARD
66
38V
VIN
LTM4641
1V
/20A
関連製品
LTM4620
13A
µModule
LTM4613
EN55022B
36V
µModule
8A
LTM4627
20V 15A
LTM8027
60V 4A
LTM4609
36V 4A
LT4356
26A
µModule
µModule
µModule
100A 4.5V ≤ VIN ≤ 16V 0.6V ≤ VOUT ≤ 2.5V
LTM4620A
15mm15mm4.41mm LGA
4
VOUT
5V ≤ VIN ≤ 36V 3.3V ≤ VOUT ≤ 15V
15mm15mm4.32mm LGA
4.5V ≤ VIN ≤ 20V 0.6V ≤ VOUT ≤ 5V
15mm15mm4.32mm LGA
15mm15mm4.92mm BGA
4.5V ≤ VIN ≤ 60V 2.5V ≤ VOUT ≤ 24V
4.5V ≤ VIN ≤ 36V 0.8V ≤ VOUT ≤ 34V
10A 15mm15mm2.82mm LGA
VIN
15mm15mm4.32mm LGA
15mm15mm3.42mm BGA
4A
100V
4641fe
66
LT 0214 REV E • PRINTED IN JAPAN
〒102-0094 東京都千代田区紀尾井町3-6紀尾井町パークビル8F
詳細：www.linear-tech.co.jp/LTM4641
TEL 03-5226-7291 ● FAX 03-5226-0268 ● www.linear-tech.co.jp/LTM4641
 LINEAR TECHNOLOGY CORPORATION 2012