ETC MAX15038

19-4320; Rev 0; 10/08
ৰ‫ۇ‬
భᄋ৙ຶ
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
``````````````````````````````````` ᄂቶ
NBY26149ဵጙ౒঱቉ఎਈࢯஂ໭ǈၒ߲࢟ኹपᆍᆐ1/7W
ᒗWJO ࡼ:1&ǈభᄋ৙঱ࡉ5BࡼঌᏲ࢟ഗă໭ୈ৔ᔫ࢟ኹ
ᆐ3/:Wᒗ6/6Wǈऻ‫ޟ‬း੝ঌᏲ࢛ਜ਼ઁኚᆮኹ።፿ăᏴᑳৈ
ঌᏲĂၒྜྷ࢟ኹਜ਼ᆨࣞ‫ܤ‬છपᆍดǈ໭ୈၒ߲࢟ኹᔐᇙ
‫ࢅތ‬᎖±2&ă
♦ ดᒙ42nΩ SET)PO*঱࣡ਜ਼35nΩ SET)PO*ࢅ࣡NPTGFU
NBY26149 ‫ݧ‬፿ৼࢾຫൈ QXN ৔ᔫෝါǈఎਈຫൈభᄰ
ਭᅪ‫࢟ݝ‬ᔜ࿸ᒙᏴ611lI{ᒗ3NI{पᆍดăNBY26149ᄋ
৙భኡᐋࡼᄢ൴ߡෝါǈጲᄋ঱༵Ᏺ቉ൈă୷঱ࡼ৔ᔫ
ຫൈᏤ኏ཝჿࠣ࢟ྏ࿸ଐǈᄴဟጐᏤ኏‫ݧ‬፿ቃߛࡁᅪ‫ݝ‬
Ꮔୈă
♦ ᑳৈᆨࣞपᆍดభᑽߒ5Bೌኚ࢟ഗၒ߲
♦ ᏴᑳৈঌᏲĂၒྜྷ࢟ኹਜ਼ᆨࣞपᆍดᄋ৙±2&ࡼၒ߲
றࣞ
♦ ৔ᔫ᎖3/:Wᒗ6/6W! WJO ࢟ኹ
♦ ၒ߲࢟ኹᏴ1/7Wᒗ)1/:! y! WJO*ᒄମభࢯ
♦ ྟ໪ࣅጴᒜၒྜྷ಍፻࢟ഗ
♦ 611lI{ᒗ3NI{భࢯఎਈຫൈ
♦ ถ৫ဧ፿ჿࠣĂ௡੝ᇕጲૺ࢟ஊၒ߲࢟ྏ
ຢดࢅࡴᄰ࢟ᔜࡼ oNPT ۣᑺᏴ୷ᒮঌᏲሆᄋ৙঱቉ൈǈ
݀భۣߒ૵ࢅࡼ଎ည࢟ঢǈᎧॊೂऱ‫ښ‬ሤ‫଼ࡍࡍ܈‬છ೫
࢟വ‫ݚۇ‬௜ă଼࡝ࡼ࢟വ‫ݚ‬௜ਜ਼፛୭๼ᒙཀྵۣቤ࿸ଐࡼ
ጙࠨᄰਭൈă
♦ :ᒬᎾ࿸࢟ኹ૞భࢯၒ߲࢟ኹ
1/7WĂ1/8WĂ1/9WĂ2/1WĂ2/3WĂ2/6WĂ2/9WĂ
3/1Wਜ਼3/6Wਜ਼భࢯ
NBY26149ด‫߅ૹݝ‬೫౑ࡒ)39NI{*࢟ኹᇙ‫ތ‬हࡍ໭ă࢟
ኹෝါ఼ᒜஉ৩ਜ਼ᇙ‫ތ‬हࡍ໭Ꮴ኏ဧ፿ JJJ ಢ‫ޡݗ‬ऱ‫ښ‬ǈ
ဧણവࡒ౑భጲࡉࡵఎਈຫൈࡼ31&ă୷౑ࡼણവࡒ౑ถ
৫ۣᑺ౐Ⴅၾზሰ።ǈ࠭ऎିቃჅኊࡼၒ߲࢟ྏǈᏤ኏
ཝჿࠣ࢟ྏ࿸ଐă
♦ భኡᐋ༓ᒜQXN૞፿᎖༵Ᏺࡼᄢ൴ߡෝါ
NBY26149௥ᎌೝৈྯზ൝૷ၒྜྷǈ፿᎖ኡᐋ:ᒬ‫ݙ‬ᄴࡼ
ၒ߲࢟ኹăᑚቋᎾᒙၒ߲࢟ኹᆐఱઓᄋ৙ ±2&ࡼၒ߲࢟
ኹறࣞǈᇄኊဧ፿‫ڜ‬ਣࡼ 1/2&றම࢟ᔜă഍ᅪǈభጲᄰ
ਭೌ୻Ᏼनౣ࣡ࡼೝৈᅪ‫࢟ݝ‬ᔜǈ๼੝ 1/7W ด‫ݝ‬૥ᓰ࢟
ኹ૞SFGJOၒྜྷ࣡ဗଝࡼᅪ‫ݝ‬૥ᓰǈ୓ၒ߲࢟ኹ࿸ᒙࡵ፿
ઓኊገࡼྀੜၫᒋăNBY26149ᄰਭᅪ‫ྏ࢟ݝ‬࿸ᒙྟ໪ࣅ
ဟମǈጲଢ଼ࢅၒྜྷ಍፻࢟ഗă
``````````````````````````````` ࢾ৪ቧᇦ
``````````````````````````````````` ።፿
♦ ࡝ࢯ࿟ဍᑽߒ‫ڔ‬ཝ໪ࣅ஠ྜྷᎾມᒙၒ߲ᓨზ
♦ ਭഗਜ਼ਭེۣઐ
♦ ၒ߲௥ᎌᇢྜྷ0Ꮞ߲࢟ഗถೆǈᓆᒲ໐ۣઐ
♦ ധ૵ఎവ࢟Ꮞ௓ኙၒ߲
♦ 35፛୭Ă5nn! y! 5nnۡቯRGOᇄ໺ॖᓤ
PART
MAX15038ETG+
TEMP RANGE
PIN-PACKAGE
-40°C to +85°C
24 Thin QFN-EP*
, ‫ܭ‬ာᇄ໺0९੝SpIT‫ܪ‬ᓰࡼॖᓤă
*FQ! >! ൡ੆๤ă
``````````````````````````` ࢜ቯ৔ᔫ࢟വ
INPUT
2.9V TO 5.5V
IN
ॲᇗ໭࢟Ꮞ
QPM
EN
BTJD0DQV0ETQਖ਼ᎧJ0P৙࢟
VDD
BST
OUTPUT
1.8V, 4A
MAX15038
LX
OUT
EES࢟Ꮞ
PGND
૥ᐶ࢟Ꮞ
CTL2
࢟ቧᎧᆀ൥࢟Ꮞ
CTL1
SBJE఼ᒜ࢟Ꮞ
FB
FREQ
REFIN
SS
COMP
VDD
MODE
GND
PWRGD
፛୭๼ᒙᏴၫ௣ᓾ೯ࡼᔢઁ৊߲ă
________________________________________________________________ Maxim Integrated Products
1
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Ⴣན඾ॅዹອਜ਼ᔢቤ‫ࡼۈ‬ၫ௣ᓾ೯ǈ༿षᆰNbyjnࡼᓍ጑ǖxxx/nbyjn.jd/dpn/doă
NBY26149
``````````````````````````````````` গၤ
NBY26149
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
ABSOLUTE MAXIMUM RATINGS
IN, PWRGD to GND..................................................-0.3V to +6V
VDD to GND ..................-0.3V to the lower of +4V or (VIN + 0.3V)
COMP, FB, MODE, REFIN, CTL1, CTL2, SS,
FREQ to GND ..........................................-0.3V to (VDD + 0.3V)
OUT, EN to GND ......................................................-0.3V to +6V
BST to LX..................................................................-0.3V to +6V
BST to GND ............................................................-0.3V to +12V
PGND to GND .......................................................-0.3V to +0.3V
LX to PGND ..................-0.3V to the lower of +6V or (VIN + 0.3V)
LX to PGND ..........-1V to the lower of +6V or (VIN + 1V) for 50ns
ILX(RMS) (Note 1) ......................................................................4A
VDD Output Short-Circuit Duration .............................Continuous
Converter Output Short-Circuit Duration ....................Continuous
Continuous Power Dissipation (TA = +70°C)
24-Pin TQFN (derate 27.8mW/°C above +70°C) ........2222mW
Thermal Resistance (Note 2)
θJA.................................................................................36°C/W
θJC ..................................................................................6°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: LX has internal clamp diodes to PGND and IN. Applications that forward bias these diodes should take care not to exceed
the IC’s package power dissipation limits.
Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com.cn/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN = VEN = 5V, CVDD = 2.2μF, TA = TJ = -40°C to +85°C, typical values are at TA = +25°C, circuit of Figure 1, unless otherwise
noted.) (Note 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
IN
IN Voltage Range
IN Supply Current
Total Shutdown Current from IN
2.9
4.7
8
5
8.5
VIN = 5V, VEN = 0
10
20
VIN = VDD = 3.3V, VEN = 0
45
fS = 1MHz, no load
VIN = 3.3V
VIN = 5V
mA
μA
3.3V LDO (VDD)
VDD rising
VDD Undervoltage Lockout
Threshold
LX starts/stops switching
VDD falling
2.6
2.35
Minimum glitch-width
rejection
VDD Output Voltage
VIN = 5V, IVDD = 0 to 10mA
VDD Dropout
VIN = 2.9V, IVDD = 10mA
VDD Current Limit
VIN = 5V, VDD = 0
2.8
2.55
10
V
μs
3.1
3.3
3.5
25
40
mA
0.025
μA
20
ns
1
V
0.8
V
0.08
V
V
BST
BST Supply Current
VBST = VIN = 5V, VLX = 0 or 5V, VEN = 0
PWM COMPARATOR
PWM Comparator Propagation
Delay
PWM Peak-to-Peak Ramp
Amplitude
PWM Valley Amplitude
2
10mV overdrive
_______________________________________________________________________________________
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
(VIN = VEN = 5V, CVDD = 2.2μF, TA = TJ = -40°C to +85°C, typical values are at TA = +25°C, circuit of Figure 1, unless otherwise
noted.) (Note 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ERROR AMPLIFIER
COMP Clamp Voltage, High
VIN = 2.9V to 5V, VFB = 0.5V, VREFIN = 0.6V
2
V
COMP Clamp Voltage, Low
VIN = 2.9V to 5V, VFB = 0.7V, VREFIN = 0.6V
0.7
V
COMP Slew Rate
VFB step from 0.5V to 0.7V in 10ns
1.6
V/μs
COMP Shutdown Resistance
From COMP to GND, VIN = 3.3V, VCOMP = 100mV,
VEN = VSS = 0
6
Ω
Internally Preset Output Voltage
Accuracy
VREFIN = VSS, MODE = GND
FB Set Point Value
CTL1 = CTL2 = GND, MODE = GND
FB to OUT Resistor
All VID settings except CTL1 = CTL2 = GND
-1
0.594
5.5
+1
%
0.6
0.606
V
8
10.5
kΩ
Open-Loop Voltage Gain
115
dB
Error-Amplifier Unity-Gain
Bandwidth
28
MHz
Error-Amplifier Common-Mode
Input Range
VDD = 2.9V to 3.5V
Error-Amplifier Maximum Output
Current
VCOMP = 1V,
VREFIN = 0.6V
FB Input Bias Current
CTL1 = CTL2 = GND
0
VFB = 0.7V, sinking
1
VFB = 0.5V, sourcing
-1
VDD - 2
V
mA
-125
nA
CTL_
CTL_ Input Bias Current
VCTL_ = 0
-7.2
VCTL_ = VDD
+7.2
Low, falling
CTL_ Input Threshold
Hysteresis
μA
0.8
Float
VDD/2
High, rising
VDD 0.8
All VID transitions
V
50
mV
REFIN
REFIN Input Bias Current
VREFIN = 0.6V
REFIN Offset Voltage
VREFIN = 0.9V, FB shorted to COMP
-185
-4.5
nA
+4.5
mV
LX (All Pins Combined)
LX On-Resistance, High-Side
ILX = -2A
LX On-Resistance, Low-Side
ILX = 2A
VIN = VBST - VLX = 3.3V
42
VIN = VBST - VLX = 5V
31
VIN = 3.3V
30
VIN = 5V
24
High-side sourcing
LX Current-Limit Threshold
5.7
Low-side sinking
LX Leakage Current
VIN = 5V, VEN = 0
42
mΩ
mΩ
7
7
Zero-crossing current threshold, MODE = VDD
54
A
0.2
VLX = 0
-0.01
VLX = 5V
+0.01
μA
_______________________________________________________________________________________
3
NBY26149
ELECTRICAL CHARACTERISTICS (continued)
NBY26149
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VEN = 5V, CVDD = 2.2μF, TA = TJ = -40°C to +85°C, typical values are at TA = +25°C, circuit of Figure 1, unless otherwise
noted.) (Note 3)
PARAMETER
LX Switching Frequency
CONDITIONS
VIN = 2.9V to 5V
MIN
TYP
MAX
RFREQ = 49.9kΩ
0.9
1
1.1
RFREQ = 23.6kΩ
1.8
2
2.2
Switching Frequency Range
500
LX Minimum Off-Time
LX Maximum Duty Cycle
RFREQ = 49.9kΩ
LX Minimum Duty Cycle
RFREQ = 49.9kΩ
Average Short-Circuit IN Supply
Current
OUT connected to GND, VIN = 5V
RMS LX Output Current
92
MHz
2000
kHz
78
ns
15
%
95
5
UNITS
%
0.15
A
4
A
ENABLE
EN Input Logic-Low Threshold
EN falling
EN Input Logic-High Threshold
EN rising
EN Input Current
VEN = 0 or 5V, VIN = 5V
0.9
1.5
V
V
0.01
μA
MODE
MODE Input-Logic Threshold
MODE Input-Logic Hysteresis
MODE Input Bias Current
Logic-low, falling
26
Logic VDD/2 or floating, rising
50
Logic-high, rising
74
MODE falling
5
MODE = GND
-5
MODE = VDD
5
% VDD
% VDD
μA
SS
SS Current
VSS = 0.45V, VREFIN = 0.6V, sourcing
6.7
8
9.3
μA
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
Rising
Thermal-Shutdown Hysteresis
165
°C
25
°C
POWER-GOOD (PWRGD)
Power-Good Threshold Voltage
VFB falling, VREFIN = 0.6V
VFB rising, VREFIN = 0.6V
88
90
92
92.5
%
VREFIN
Clock
cycles
Power-Good Edge Deglitch
VFB rising or falling
48
PWRGD Output Voltage Low
IPWRGD = 4mA
0.03
PWRGD Leakage Current
VIN = VPWRGD = 5V, VFB = 0.7V, VREFIN = 0.6V
0.01
μA
Current-Limit Startup Blanking
112
Clock
cycles
Autoretry Restart Time
896
Clock
cycles
0.1
V
HICCUP OVERCURRENT LIMIT
4
_______________________________________________________________________________________
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
(VIN = VEN = 5V, CVDD = 2.2μF, TA = TJ = -40°C to +85°C, typical values are at TA = +25°C, circuit of Figure 1, unless otherwise
noted.) (Note 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
FB Hiccup Threshold
VFB falling
70
%
VREFIN
Hiccup Threshold Blanking Time
VFB falling
28
μs
Note 3: Specifications are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design.
````````````````````````````````````````````````````````````````````````` ࢜ቯ৔ᔫᄂቶ
(Typical values are VIN = VEN = 5V, VOUT = 1.8V, RFREQ = 49.9kΩ, IOUT = 4A, TA = +25°C, circuit of Figure 1, unless otherwise noted.)
EFFICIENCY
vs. OUTPUT CURRENT
90
2.20
MAX15038 toc02
100
MAX15038 toc01
100
FREQUENCY
vs. INPUT VOLTAGE
90
MAX15038 toc03
EFFICIENCY
vs. OUTPUT CURRENT
2.15
70
VOUT = 1.8V
60
VOUT = 2.5V
VOUT = 1.8V
70
VOUT = 1.2V
60
VOUT = 1.2V
2.05
2.00
1.95
TA = +85°C
1.90
50
50
40
40
TA = +25°C
TA = -40°C
1.85
VIN = 3.3V
10.0
1.0
RFREQ = 23.2kΩ
1.80
0.1
OUTPUT CURRENT (A)
FREQUENCY (MHz)
1.05
1.00
TA = +85°C
TA = +25°C
TA = -40°C
MAX15038 toc05a
1.10
-0.05
-0.10
-0.15
-0.20
VOUT = 1.2V
-0.25
-0.30
VOUT = 1.8V
-0.35
VOUT = 2.5V
-0.40
3.5
4.0
4.5
INPUT VOLTAGE (V)
5.0
5.5
4.5
5.0
5.5
0
VOUT = 2.5V
-0.02
VOUT = 1.8V
-0.04
-0.06
-0.08
-0.10
VOUT = 1.2V
-0.12
-0.50
0.80
3.0
4.0
-0.45
RFREQ = 49.9kΩ
2.5
3.5
LINE REGULATION (LOAD = 4A)
0
OUTPUT-VOLTAGE CHANGE (%)
MAX15038 toc04
1.15
0.85
3.0
INPUT VOLTAGE (V)
LOAD REGULATION
1.20
0.90
2.5
OUTPUT CURRENT (A)
FREQUENCY
vs. INPUT VOLTAGE
0.95
10.0
1.0
OUTPUT-VOLTAGE CHANGE (%)
0.1
MAX15038 toc05b
VOUT = 2.5V
80
FREQUENCY (MHz)
EFFICIENCY (%)
EFFICIENCY (%)
2.10
80
0
1
2
LOAD CURRENT (A)
3
4
2.5
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
_______________________________________________________________________________________
5
NBY26149
ELECTRICAL CHARACTERISTICS (continued)
```````````````````````````````````````````````````````````````````` ࢜ቯ৔ᔫᄂቶ)ኚ*
(Typical values are VIN = VEN = 5V, VOUT = 1.8V, RFREQ = 49.9kΩ, IOUT = 4A, TA = +25°C, circuit of Figure 1, unless otherwise noted.)
SWITCHING WAVEFORMS
(FORCED PWM, 2A LOAD)
LOAD TRANSIENT
SWITCHING WAVEFORMS
(SKIP MODE, NO LOAD)
MAX15038 toc07
MAX15038 toc06
VOUT
AC-COUPLED
100mV/div
MAX15038 toc08
AC-COUPLED
50mV/div
VOUT
AC-COUPLED
100mV/div
VOUT
1A/div
2A/div
ILX
2A
ILX
0A
0A
5V/div
IOUT
VLX
5V/div
0A
VLX
0V
400ns/div
40μs/div
2μs/div
SOFT-START WAVEFORM
(RLOAD = 0.5Ω)
SHUTDOWN WAVEFORM
(RLOAD = 0.5Ω)
MAX15038 toc09
MAX15038 toc10
VEN
5V/div
VEN
5V/div
VOUT
1V/div
VOUT
1V/div
0V
0V
400μs/div
10μs/div
INPUT SHUTDOWN CURRENT
vs. INPUT VOLTAGE
MAXIMUM OUTPUT CURRENT
vs. OUTPUT VOLTAGE
10
9
8
7
6
MAX15038 toc12
11
10
MAXIMUM OUTPUT CURRENT (A)
MAX15038 toc11
12
INPUT SHUTDOWN CURRENT (μA)
NBY26149
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
9
8
7
6
5
4
3
VEN = 0V
2
5
2.5
3.0
3.5
4.0
4.5
INPUT VOLTAGE (V)
6
5.0
5.5
0.5
1.0
1.5
2.0
OUTPUT VOLTAGE (V)
_______________________________________________________________________________________
2.5
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
RMS INPUT CURRENT DURING
SHORT CIRCUIT vs. INPUT VOLTAGE
MAX15038 toc14
0.5
RMS INPUT CURRENT (A)
1V/div
VOUT
0V
5A/div
IOUT
0A
IIN
1A/div
0.4
0.3
0.2
0.1
0A
90
80
70
60
50
40
4A LOAD
30
20
10
VOUT = 0V
0
MEASURED ON A MAX15038EVKIT
0
2.5
400μs/div
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
0
20
40
60
80
100
AMBIENT TEMPERATURE (°C)
FEEDBACK VOLTAGE
vs. TEMPERATURE
SOFT-START WITH REFIN
MAX15038 toc17
MAX15038 toc16
0.64
0.63
FEEDBACK VOLTAGE (V)
100
MAX15038 toc15
MAX15038 toc13
EXPOSED PAD TEMPERATURE
vs. AMBIENT TEMPERATURE
EXPOSED PAD TEMPERATURE (°C)
HICCUP CURRENT LIMIT
1A/div
IIN
0.62
0A
0.61
0.5V/div
VREFIN
0V
0.60
0.59
1V/div
VOUT
0V
0.58
VPWRGD
0.57
2V/div
0V
0.56
-40
-15
10
35
60
85
200μs/div
TEMPERATURE (°C)
STARTING INTO PREBIASED OUTPUT
(MODE = VDD/2, VOUT = 2.5V, 2A LOAD)
STARTING INTO PREBIASED OUTPUT
(MODE = VDD, VOUT = 2.5V, 2A LOAD)
MAX15038 toc19
MAX15038 toc18
5V/div
VEN
5V/div
VEN
0V
0V
1V/div
1V/div
VOUT
VOUT
0V
0V
2A
IOUT
2A
IOUT
0A
0A
5V/div
VPWRGD
5V/div
VPWRGD
0V
0V
200μs/div
200μs/div
_______________________________________________________________________________________
7
NBY26149
```````````````````````````````````````````````````````````````````````` ࢜ቯ৔ᔫᄂቶ)ኚ*
(Typical values are VIN = VEN = 5V, VOUT = 1.8V, RFREQ = 49.9kΩ, IOUT = 4A, TA = +25°C, circuit of Figure 1, unless otherwise noted.)
NBY26149
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
```````````````````````````````````````````````````````````````````` ࢜ቯ৔ᔫᄂቶ)ኚ*
(Typical values are VIN = VEN = 5V, VOUT = 1.8V, RFREQ = 49.9kΩ, IOUT = 4A, TA = +25°C, circuit of Figure 1, unless otherwise noted.)
STARTING INTO PREBIASED OUTPUT
(MODE = VDD/2, VOUT = 2.5V, NO LOAD)
STARTING INTO PREBIASED OUTPUT
(MODE = VDD, VOUT = 2.5V, NO LOAD)
MAX15038 toc21
MAX15038 toc20
VEN
2V/div
VEN
2V/div
0V
0V
VOUT
1V/div
VOUT
1V/div
0V
0V
VPWRGD
2V/div
VPWRGD
2V/div
0V
0V
200μs/div
200μs/div
STARTING INTO PREBIASED OUTPUT
ABOVE NOMINAL SETPOINT (VOUT = 1.5V)
STARTING INTO PREBIASED ABOVE
NOMINAL SETPOINT (VOUT = 1.5V)
MAX15038 toc22
MAX15038 toc23
VEN
2V/div
VEN
2V/div
0V
0V
VOUT
1V/div
VMODE = VDD,
NO LOAD
VOUT
1V/div
0V
0V
VPWRGD
2V/div
VPWRGD
2V/div
VMODE = VDD/2,
NO LOAD
0V
1ms/div
1ms/div
TRANSITION FROM SKIP MODE
TO FORCED PWM MODE
TRANSITION FROM FORCED PWM
TO SKIP MODE
MAX15038 toc24
MAX15038 toc25
VMODE
5V/div
VMODE
5V/div
VLX
5V/div
VLX
5V/div
VOUT
0.5V/div
VOUT
0.5V/div
0V
0V
2ms/div
8
0V
4ms/div
_______________________________________________________________________________________
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
፛୭
෗߂
1
MODE
2
VDD
4/4W! MEPၒ߲ăด‫ݝ‬ෝผਖ਼࢟ኹࡼ࢟ᏎၒྜྷăᏴWEE ᒗHOEᒄମೌ୻ጙৈᒗ࿩3/3μGࡼࢅFTSĂჿࠣ࢟ྏă
3
CTL1
4
CTL2
Ꮎ࿸ၒ߲࢟ኹኡᐋၒྜྷăDUM2ਜ਼DUM3ኡᐋ:ᒬ‫ݙ‬ᄴࡼᎾ࿸ၒ߲࢟ኹăᎾ࿸ၒ߲࢟ኹభ‫ݬ‬୅‫ܭ‬2ਜ਼࿸ᒙၒ߲࢟ኹ
)DUM2ĂDUM3*‫ݝ‬ॊă
5
REFIN
ᅪ‫ݝ‬૥ᓰၒྜྷăೌ୻SFGJOᒗTTဟǈဧ፿ด‫ݝ‬1/7W૥ᓰăೌ୻SFGJOᒗᅪ‫ݝ‬૥ᓰ࢟ኹǈࢯஂGCᆮࢾᏴSFGJO࢟
ኹăJDࠀ᎖ਈࣥ0ࡌᡅෝါဟǈSFGJOด‫ݝ‬౯ᒗHOEă
6
SS
ྟ໪ࣅၒྜྷăᏴTTਜ਼HOEᒄମೌ୻ጙৈ࢟ྏǈጲ࿸ᒙ໪ࣅဟମăক࢟ྏᔢቃནᒋ2oGăᎌਈ࿸ᒙྟ໪ࣅဟମࡼ
ሮᇼቧᇦǈ༿‫ݬ‬ఠྟ໪ࣅਜ਼SFGJO ‫ݝ‬ॊă
7
GND
8
COMP
9
FB
10
OUT
ၒ߲࢟ኹଶ‫ހ‬ǈೌ୻ᒗၒ߲ăဧ፿ᅪ‫࢟ݝ‬ᔜॊኹ໭ဟǈ୓PVUኞహă
11
FREQ
ᑩ࡬໭ຫൈኡᐋăᏴGSFRਜ਼HOEᒄମೌ୻ጙৈ࢟ᔜǈ፿᎖ኡᐋఎਈຫൈă‫ݬ‬୅ຫൈኡᐋ)GSFR*‫ݝ‬ॊă
12
PWRGD
13
BST
14, 15,
16
LX
17–20
PGND
21, 22,
23
IN
࢟Ꮞၒྜྷăၒྜྷ࢟Ꮞपᆍᆐ3/:Wᒗ6/6Wă‫ݧ‬፿ጙৈ33μGჿࠣ࢟ྏ୓JO๬വᒗQHOEă
24
EN
ဧถၒྜྷǈক൝૷ၒྜྷ፿᎖ဧถ0ணᒏNBY26149ă
—
EP
ൡ੆๤ă୓FQೌ୻ᒗᎧQHOEሤೌࡼࡍෂ૩୻࢐‫ށ‬ǈጲᎁછྲེቶถă‫ݙ‬ถ୓FQᔪᆐ໭ୈࡼᆎጙ୻࢐ೌ୻ă
৖ถ
৖ถෝါኡᐋၒྜྷăৎࣶቧᇦǈ‫ݬ‬୅ෝါኡᐋ‫ݝ‬ॊă
ෝผ࢐ೌ୻ăᏴణதၒྜྷ๬വ࢟ྏऩૄ࣡ࠀ୓HOEਜ਼QHOE࡝࢛ೌ୻໦౶ă
࢟ኹᇙ‫ތ‬हࡍ໭ࡼၒ߲ăᏴDPNQᒗGCਜ਼PVUᒄମೌ୻‫ܘ‬ገࡼ‫ޡݗ‬ᆀ൥ăJDࠀ᎖ਈࣥ0ࡌᡅෝါဟǈDPNQด‫ݝ‬
౯ᒗHOEă
नౣၒྜྷă୓GCೌ୻ᒗၒ߲ਜ਼HOEᒄମᅪ‫࢟ݝ‬ᔜॊኹ໭ࡼᒦቦߥᄿǈၒ߲࢟ኹభ࿸ᒙࡵ1/7Wᒗ):1&! y! WJO*प
ᆍดă፿DUM2ਜ਼DUM3ኡᐋ:ᒬ‫ݙ‬ᄴࡼᎾ࿸ၒ߲࢟ኹဟǈᏴGCᒗၒ߲ᒄମೌ୻SDᆀ൥ă
ധ૵ఎവĂ࢟Ꮞ௓ኙၒ߲ăࡩWGC ࿟ဍᒗި߲WSFGJO ࡼ:3/6&! )࢜ቯᒋ*݀༦WSFGJO ࡍ᎖1/65WဟǈQXSHEᆐ঱
ᔜზăࡩWGC ࢰൢᒗࢅ᎖WSFGJO ࡼ:1&! )࢜ቯᒋ*૞WSFGJO ቃ᎖1/65WဟǈQXSHEด‫ݝ‬౯ᒗࢅ࢟ຳăJDࠀ᎖ਈࣥ
ෝါĂWEE ࢅ᎖ด‫ݝ‬VWMPඡሢ૞ᑗJDࠀ᎖ེਈࣥෝါဟǈQXSHE‫ۻ‬ด‫ݝ‬౯ࢅă
঱‫ܟ‬NPTGFUདࣅ໭࢟ᏎăᄰਭጙৈqNPTఎਈด‫୻ೌݝ‬ᒗJOă‫ݧ‬፿ጙৈ1/2μG࢟ྏ๬വCTUᒗMYă
࢟ঢೌ୻ǈჅᎌMY፛୭௿Ᏼด‫୻ೌݝ‬Ᏼጙ໦ăೌ୻ჅᎌMY፛୭ᒗၒ߲࢟ঢࡼఎਈ‫ݾ‬ăJDࠀ᎖ਈࣥෝါဟǈ
MYᆐ঱ᔜზă
৖ൈ࢐ă࠭ᅪ‫୻ೌݝ‬ჅᎌQHOE፛୭ᒗ৖ൈ࢐‫ށ‬ăᏴణதJDᆡᒙࠀ୓ჅᎌQHOE፛୭ೌ୻Ᏼጙ໦ă
_______________________________________________________________________________________
9
NBY26149
`````````````````````````````````````````````````````````````````````````` ፛୭ႁී
NBY26149
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
```````````````````````````````````````````````````````````````````````````` ऱౖᅄ
VDD
MAX15038
3.3V LDO
UVLO
CIRCUITRY
SHUTDOWN
CONTROL
EN
BST
CURRENT-LIMIT
COMPARATOR
BST SWITCH
IN
BIAS
GENERATOR
VOLTAGE
REFERENCE
THERMAL
SHUTDOWN
CONTROL
LOGIC
LX
IN
SS
SOFT-START
PGND
CURRENT-LIMIT
COMPARATOR
REFIN
OUT
ERROR
AMPLIFIER
8kΩ
PWM
COMPARATOR
MODE
FB
CTL1
CTL2
VID
VOLTAGECONTROL
CIRCUITRY
FREQ
1VP-P
OSCILLATOR
COMP
PWRGD
SHDN
FB
COMP CLAMPS
0.9 x VREFIN
10
______________________________________________________________________________________
GND
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
2.2Ω
INPUT
2.9V TO 5.5V
OPTIONAL
IN
C6
22μF
C7
0.1μF
BST
C15
1000pF
C10
0.1μF
L1
0.47μH
MAX15038
OUTPUT
1.8V, 4A
LX
VDD
C5
2.2μF
OUT
C8
22μF
C3
560pF
CTL2
C9
0.01μF
R3
158Ω
CTL1
PGND
EN
FB
FREQ
C2
1500pF
R2
2.67kΩ
REFIN
R4
49.9kΩ
SS
C1
33pF
C4
0.022μF
COMP
MODE
GND
VDD
R1
20kΩ
PWRGD
ᅄ2/! 2NI{ĂWJO >! 3/:Wᒗ6/6WጲૺWPVU >! 2/9Wဟࡼཝჿࠣ࢟ྏ࿸ଐ
``````````````````````````````` ሮᇼႁී
NBY26149ᆐ঱቉ൈĂ࢟ኹෝါఎਈࢯஂ໭ǈ௥ᎌ5Bࡼၒ
߲࢟ഗถೆăNBY26149৔ᔫᏴ3/:Wᒗ6/6Wၒྜྷ࢟Ꮞपᆍ
ดǈభጲᄋ৙1/7Wᒗ1/: y WJO ࡼၒ߲࢟ኹǈဧ໚ऻ‫ޟ‬း੝
ঌᏲ࢛።፿ăᏴᑳৈঌᏲĂၒྜྷ࢟ኹਜ਼ᆨࣞ‫ܤ‬છपᆍดǈ
໭ୈၒ߲࢟ኹறࣞᎁ᎖±2&ă
NBY26149௥ᎌ୷౑ࡼఎਈຫൈपᆍǈభጲဣሚཝჿࠣ࢟
ྏ࿸ଐጲૺ౐Ⴅၾზሰ።)‫ݬ‬୅ᅄ 2*ă঱ఎਈຫൈᏤ኏‫ݧ‬
፿ቃߛࡁᅪ‫ݝ‬ᏄୈăNBY26149 ‫ݧ‬፿ቃቯ)5nn y 5nn*Ă
ᇄ໺Ă35፛୭ۡቯRGOॖᓤăSFGJOဧNBY26149భಯሯ
፿᎖ EES ਜ਼ৌᔍ࢟Ꮞă‫ݧ‬፿ด‫ ࢅݝ‬S ET)PO* )ࢅ‫ ܟ‬o ৥ࡸ
NPTGFU 35nΩ Ǘ঱‫ ܟ‬o ৥ࡸ NPTGFU 42nΩ*ࡼ o ৥ࡸ
NPTGFUǈభጲᏴᒮᏲਜ਼঱ఎਈຫൈሆۣߒ঱቉ൈă
NBY26149‫ݧ‬፿࢟ኹෝါ఼ᒜஉ৩ǈࡒᎌ౑ࡒ)39NI{*ᇙ
‫ތ‬हࡍ໭ă࢟ኹෝါ఼ᒜஉ৩Ꮴ኏঱ࡉ3NI{ࡼఎਈຫൈǈ
ିቃ೫࢟വ‫ۇ‬ෂ૩ă࢟ኹᇙ‫ތ‬ᏥႯहࡍ໭‫ݧ‬፿ JJJ ቯ‫ޡݗ‬
ऱ‫ښ‬ǈߠॊಽ፿঱ఎਈຫൈࡼࡒ౑ǈጲ૝ࡻ౐Ⴅၾზሰ
።ăభࢯஂࡼྟ໪ࣅဟମభጲഉ૚࿸ᒙǈିቃ೫ၒྜྷ໪
ࣅ಍፻࢟ഗăࡩWGC ࡉࡵWSFGJO ࡼ:3/6&݀༦WSFGJO ࡍ᎖
1/65Wဟǈ࢟Ꮞ௓ኙ)QXSHE*ఎധၒ߲‫ܤ‬ᆐ঱࢟ຳă
NBY26149ᎌ4ᒬ৔ᔫෝါభ৙ኡᐋǖ‫ܪ‬ᓰQXNෝါĂ࡝
ࢯ໪ࣅᒗᎾມᒙၒ߲ࡼQXNෝါ૞࡝ࢯ໪ࣅᒗᎾມᒙၒ
߲ࡼᄢ൴ߡෝါă
______________________________________________________________________________________
11
NBY26149
`````````````````````````````````````````````````````````````````````` ࢜ቯ።፿࢟വ
NBY26149
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
఼ᒜ໭৖ถ
఼ᒜ໭൝૷࢟വᆐᒦያࠀಯ໭ǈ፿౶௼ࢾ‫ݙ‬ᄴၒྜྷ࢟ኹĂ
ঌᏲਜ਼ᆨࣞᄟୈሆ঱‫ܟ‬NPTGFUࡼᐴహ‫܈‬ăᑵ‫ޟ‬৔ᔫෝါ
ሆǈ࢟ഗሢᒜਜ਼ᆨۣࣞઐᆚ߿खǈ఼ᒜ໭൝૷࢟വ୻၃
QXN ‫୷܈‬໭ࡼၒ߲ǈ‫ޘ‬ည঱‫ܟ‬ਜ਼ࢅ‫ ܟ‬NPTGFU ࡼདࣅቧ
੓ăሌࣥઁ੝൝૷ਜ਼ᔈ௟࢟ྏߠ࢟ࡼဟኔ၊఼᎖఼ᒜ໭
൝૷࢟വă࢟ኹᇙ‫ތ‬हࡍ໭‫ޘ‬ညࡼᇙ‫ތ‬ቧ੓Ꭷᑩ࡬໭‫ޘ‬
ညࡼቓຸቧ੓ᄰਭQXN‫୷܈‬໭஠ቲ‫୷܈‬ǈᎅࠥ‫ޘ‬ညჅኊ
ࡼ QXN ቧ੓ă঱‫ܟ‬ఎਈᏴᑩ࡬໭ᒲ໐ࡼఎဪ୿ࣤࡴᄰǈ
ࡩቓຸ࢟ኹިਭ W DPNQ ቧ੓࢟ኹ૞ᑗި߲ሢഗඡሢဟਈ
ࣥăႲઁǈᏴᑩ࡬໭ࡼထ᎜ᒲ໐ดǈࢅ‫ܟ‬ఎਈۣߒࡴᄰă
࢟ഗሢᒜ
ด‫ݝ‬঱‫ ܟ‬NPTGFU ௥ᎌ 8B )࢜ቯᒋ*ख़ᒋ࢟ഗඡሢăࡩ࠭
MY ഗ߲ࡼ࢟ഗި߲ࠥඡሢဟǈ঱‫ ܟ‬NPTGFU ਈ‫ܕ‬ǈᄴဟ
ࡌఎᄴ‫ݛ‬ᑳഗ໭ăᄴ‫ݛ‬ᑳഗ໭ጙᒇۣߒఎ໪ᓨზǈᒇࡵ
࢟ঢ࢟ഗࢅ᎖ࢅ‫ܟ‬ఎਈሢഗඡሢăᑚዹ୓ଢ଼ࢅᐴహ‫݀܈‬
ଢ଼ࢅၒ߲࢟ኹǈᒇᒗ‫ݙ‬Ᏻި߲࢟ഗඡሢăNBY26149‫ݧ‬፿
ࡌᡅෝါǈ‫ܜ‬඾ၒ߲࣢വဟበຢਭེă
ሢഗ໐ମǈྙਫWGC ࢅ᎖WSFGJO y 81&݀༦ࢅ᎖ক࢟ຳࡼဟ
ମިਭ23μtဟǈNBY26149஠ྜྷࡌᡅෝါă঱‫ܟ‬NPTGFU
ਜ਼ᄴ‫ݛ‬ᑳഗ໭‫ۻ‬ਈࣥǈᄴဟDPNQਜ਼SFGJO‫ۻ‬ด‫ݝ‬౯ࢅă
ྙਫSFGJOਜ਼TTೌ୻Ᏼጙ໦ǈกඐᑚೝৈ፛୭௿‫ۻ‬౯ࢅă
໭ୈۣߒকᓨზ 9:7 ৈဟᒩᒲ໐ǈႲઁᏴ 223 ৈဟᒩᒲ໐
ด‫ޞ‬၂ᒮ໪ăྙਫࡴᒘሢഗࡼ৺ᑇ‫߹༹ۻ‬ǈ໭ୈૂআᑵ‫ޟ‬
৔ᔫෝါă॥ᐌǈ໭ୈᏳࠨ஠ྜྷࡌᡅෝါă
SFGJO࢟ኹ࿟ă‫ݧ‬፿ᅪ‫ݝ‬૥ᓰဟǈด‫ྟݝ‬໪ࣅᇄ቉ăᅄ3
Ⴥာᆐ‫ݧ‬፿ᅪ‫ݝ‬૥ᓰဟǈဣሚྟ໪ࣅࡼऱजăೌ୻SFGJO
ᒗTTǈጲဧ፿ด‫ݝ‬1/7W૥ᓰăTT࿟࢟ྏᔢቃནᒋ2oGă
་ኹჄࢾ)VWMP*
ྦWEE ଢ଼ࢅᒗ3/66W )࢜ቯᒋ*ጲሆဟǈVWMP࢟വ୓ணᒏఎ
ਈࣅᔫăጙࡡWEE ࿟ဍᒗ3/7W )࢜ቯᒋ*ጲ࿟ǈVWMP୓ஊ
߹ǈᏳࠨఎဪྟ໪ࣅਭ߈ăดᒙ61nWᒣૄǈ፿᎖ጴᒜ൴
ߡছཷă
CTU
঱‫ܟ‬Ăo৥ࡸఎਈࡼᐜ૵དࣅ࢟ኹᎅऽ࢟ྏဍኹ࢟വ‫ޘ‬ညă
ࡩࢅ‫ ܟ‬NPTGFU ࡴᄰဟǈೌ୻Ᏼ CTU ፛୭ਜ਼ MY ፛୭ᒄମ
ࡼᑚৈ࢟ྏᎅWJO ࢟Ꮞߠ࢟ăࡩࢅ‫ܟ‬NPTGFUਈࣥǈ୓ऽ
࢟ྏ࿟ࡼ࢟ኹࢶଝࡵMY࣡࢟ኹǈᆐด‫ݝ‬঱‫ܟ‬NPTGFUᄋ
৙‫ܘ‬ኊࡼࡴᄰ࢟ኹă
ຫൈኡᐋ)GSFR*
ఎਈຫൈభᎅጙৈ࢟ᔜᏴ611lI{ᒗ3NI{पᆍด஠ቲ‫߈ܠ‬
࿸ࢾăಽ፿ೌ୻ᏴGSFRਜ਼HOEᒄମࡼ࢟ᔜ)SGSFR*౶࿸ᒙ
JDࡼఎਈຫൈăSGSFR ଐႯऱါྙሆǖ
50kΩ
1
RFREQ =
× ( − 0.05μs)
0.95μs fS
໚ᒦǈgT ᆐჅገཇࡼఎਈຫൈǈ࡝ᆡᆐ੣ᓼă
ྟ໪ࣅਜ਼SFGJO
NBY26149ಽ፿భ‫ྟࡼ߈ܠ‬໪ࣅ৖ถ౶ሢᒜ໪ࣅਭ߈ᒦࡼ
಍፻࢟ഗă9μB )࢜ቯᒋ*࢟ഗᏎ࣪ೌ୻Ᏼ TT ࡼᅪ‫ྏ࢟ݝ‬
஠ቲߠ࢟ăྟ໪ࣅဟମᎅೌ୻ᏴTTᒗHOEᒄମࡼᅪ‫࢟ݝ‬
ྏᒋ౶ࢯஂăჅኊࡼ࢟ྏᒋᎅሆါ௼ࢾǖ
C=
REFIN
R2
C
MAX15038
8μA × tSS
0.6V
໚ᒦǈuTT ᆐჅኊࡼྟ໪ࣅဟମǈ࡝ᆡᆐ෇ăNBY26149થ
భጲᅪ୻૥ᓰၒྜྷ)SFGJO*ăJDᄰਭࢯஂGCǈဧ໚ᆮࢾᏴ
12
R1
ᅄ3/! ‫ݧ‬፿ᅪ‫ݝ‬૥ᓰဟǈ࢜ቯࡼྟ໪ࣅဣሚऱज
______________________________________________________________________________________
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
QXSHEᆐఎധၒ߲ǈWGC ި߲1/:36 y WSFGJO ݀༦WSFGJO
ࡍ᎖1/65W༦ߒኚᒗ࿩59ৈဟᒩᒲ໐ဟ‫ܤ‬ᆐ঱ᔜზăWGC ࢅ
᎖WSFGJO y :1&૞WSFGJO ቃ᎖1/65W݀༦ߒኚᒗ࿩59ৈဟᒩ
ᒲ໐ဟǈQXSHE౯ᒗࢅ࢟ຳăࡩJDࠀ᎖ਈࣥෝါĂWEE ࢅ
᎖ด‫ݝ‬VWMPඡሢ૞ᑗJDࠀ᎖ེਈࣥෝါဟǈQXSHE‫ۻ‬ด
‫ݝ‬౯ࢅă
࿸ᒙၒ߲࢟ኹ)DUM2ĂDUM3*
ྙ‫ܭ‬2Ⴥာǈၒ߲࢟ኹဵᎅDUM2ਜ਼DUM3ࡼ൝૷ᓨზ፛୭
‫߈ܠ‬࿸ࢾࡼăDUM2ਜ਼DUM3ᆐྯზ࢟ຳၒྜྷǖWEEĂኞహ
ਜ਼HOEăࡩDUM2ਜ਼DUM3ೌ୻ᒗHOEဟǈ‫ܘ‬ኍᏴWPVU ਜ਼
GC ᒄମೌ୻ጙৈ 9/17lΩ ࢟ᔜăDUM2 ਜ਼ DUM3 ࡼ൝૷ᓨზ
‫ܘ‬ኍᏴ࿟࢟ᒄ༄ᅲ߅‫߈ܠ‬࿸ࢾăጙࡡ໭ୈ‫ۻ‬ဧถǈ‫ݙ‬ገ
খ‫ܤ‬DUM2ਜ਼DUM3ăྙਫኊገ࣪ၒ߲࢟ኹ஠ቲᒮቤ‫߈ܠ‬ǈ
ኊገᒮቤ໪ࣅ࢟Ꮞ૞߿खFOǈ݀ᏴᏳࠨဧถ༄ᅲ߅ᒮቤ
‫߈ܠ‬ăᄰਭᏴWPVUĂGCਜ਼HOEᒄମဧ፿࢟ᔜॊኹ໭ᆀ൥ǈ
భᏴ1/7WᒗWJO y :1&ᒄମೌኚ࿸ᒙၒ߲࢟ኹǈྙᅄ4bჅ
ာăDUM2ਜ਼DUM3‫ܘ‬ኍೌ୻ᒗHOEă
ਈࣥෝါ
‫ܭ‬2/! DUM2ਜ਼DUM3ၒ߲࢟ኹኡᐋ
CTL1
CTL2
GND
GND
0.6
VDD
VDD
0.7
GND
Unconnected
0.8
1.0
NBY26149
࢟Ꮞ௓ኙၒ߲)QXSHE*
VOUT (V)
GND
VDD
Unconnected
GND
1.2
Unconnected
Unconnected
1.5
Unconnected
VDD
1.8
VDD
GND
2.0
VDD
Unconnected
2.5
ࢅFTSჿࠣ࢟ྏ࣪WEE ஠ቲབྷẮă୓ᑚቋ࢟ྏ஧భถణத
JDहᒙă
࢟ঢኡᐋ
‫ږ‬ᑍሆෂࡼ৛ါኡᐋ࢟ঢǖ
L=
VOUT × (VIN − VOUT )
fS × VIN × LIR × IOUT(MAX)
དࣅ FO ᒗ HOEǈጲਈࣥ JDǈࠥဟஸზ࢟ഗ୓ଢ଼ᒗ 21μB
)࢜ቯᒋ*ጲሆăਈࣥ໐ମǈMYᆐ঱ᔜზăདࣅFOᒗ঱࢟
ຳǈဧถNBY26149ă
໚ᒦǈMJSᆐᔢቃᐴహ‫܈‬ሆ࢟ঢᆬ݆࢟ഗᎧ൸ঌᏲ࢟ഗࡼ
‫܈‬ᒋăገࡻࡵᔢଛࡼቶถਜ਼ᆮࢾቶǈኡᐋMJSဧ໚஑᎖31&
ᒗ51&ă
ེۣઐ
Ᏼ৊ࢾߛࡁሆǈኡᐋᒇഗ࢟ᔜ஧భถቃࡼ࢟ঢăఠ൅ࡵ
ቶถǈᄰ‫ޟ‬ॏᓨᄤድᄏࠟበ࢟ঢဵᔢଛኡᐋă‫ݙ‬൙‫ݧ‬፿
ੜᒬࠟበǈࠟበ‫ܘ‬ኍᔗ৫ࡍጲۣᑺᏴNBY26149ࡼ࢟ഗሢ
ᒜሆ‫ۥݙ‬ਜ਼ă
ེਭᏲۣઐ৖ถሢᒜ໭ୈࡼᔐ৖੒ăࡩஉᆨިਭ UK >
,276°D ဟǈᆨࣞࠅঢ໭༓ᒜ໭ୈ஠ྜྷਈࣥᓨზǈጲଢ଼ࢅ
਌በᆨࣞăࡩஉᆨሆଢ଼ 31°D ጲઁǈᆨࣞࠅঢ໭୓Ᏻࠨ໪
ࣅ໭ୈǈᏴೌኚਭᏲᄟୈሆ‫ޘ‬ညମቌၒ߲ăེਈࣥਭ߈
உၦઁǈ୓ᒮቤఎဪྟ໪ࣅਭ߈ă
``````````````````````````````` ።፿ቧᇦ
JOਜ਼WEE བྷẮ
ᆐି࿩ᎅ᎖঱ఎਈຫൈࡴᒘࡼᐅဉǈ݀ဧNBY26149ၒ߲
றࣞᔢࡍછǈᏴ JO ਜ਼ QHOE ᒄମೌ୻ጙৈ 33μG ࡼ࢟ྏ࣪
JO஠ቲབྷẮăᄴဟǈᏴWEE ਜ਼HOEᒄମೌ୻ጙৈ3/3μGࡼ
ၒ߲࢟ྏኡᐋ
ኡᐋၒ߲࢟ྏࡼਈ୆‫ݬ‬ၫᆐ࢟ྏᒋĂFTSĂFTMਜ਼ऄࢾ࢟
ኹࢀăᑚቋ‫ݬ‬ၫ፬ሰ ED.ED ᓞધ໭ࡼᑳᄏᆮࢾቶĂၒ߲
࢟ኹᆬ݆ਜ਼ၾზሰ።ăၒ߲ᆬ݆ဵᎅ᎖ࡀ߼Ᏼၒ߲࢟ྏ
ᒦࡼ࢟੗‫ܤ‬છĂ࢟ྏFTS࿟ࡼኹଢ଼ጲૺFTM࿟ࡼኹଢ଼‫ޘ‬ည
ࡼăଐႯᎅ᎖ၒ߲࢟ྏĂFTSਜ਼FTM፛໦ࡼၒ߲࢟ኹᆬ݆ǖ
VRIPPLE = VRIPPLE(C) + VRIPPLE(ESR) + VRIPPLE(ESL)
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13
NBY26149
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
໚ᒦǈᎅ᎖ၒ߲࢟ྏĂFTSਜ਼FTM፛໦ࡼၒ߲ᆬ݆ॊܰᆐǖ
IP − P
VRIPPLE(C) =
8 x COUT x fS
ࢀါ৊߲ࡼᒋǈጲۣߒၒྜྷᆬ݆࢟ኹᏴᒎ‫ܪ‬पᆍดǈ݀
༦ဧनౣᒗၒྜྷ࢟Ꮞࡼ঱ຫᆬ݆࢟ഗᔢቃǖ
CIN _ MIN =
VRIPPLE(ESR) = IP − P x ESR
໚ᒦǈWJO.SJQQMF ᆐၒྜྷ࢟ྏჅᏤ኏ࡼᔢࡍၒྜྷᆬ݆࢟ኹǈ
୐ፇকᒋࢅ᎖ᔢቃၒྜྷ࢟ኹࡼ3&ăEᆐᐴహ‫)܈‬WPVU0WJO*ǈ
UT ᆐఎਈᒲ໐)20gT*ă
I
VRIPPLE(ESL) = P − P x ESL
tON
Ᏼఎਈຫൈሆࡼၒྜྷ࢟ྏᔜఝ።ቃ᎖ၒྜྷ࢟Ꮞࡼᔜఝ࠭
ऎဧ঱ຫఎਈ࢟ഗ‫્ݙ‬ᄰਭၒྜྷᏎǈऎဵᎅၒྜྷ࢟ྏ๬
വăၒྜྷ࢟ྏ‫ܘ‬ኍߌ၊ఎਈ࢟ഗჅ፛໦ࡼᆬ݆࢟ഗăSNT
ၒྜྷᆬ݆࢟ഗᎅሆါ௼ࢾǖ
૞ǖ
I P
x ESL
VRIPPLE(ESL) = P −P
tOFF
૞໚ᒦᔢࡍࡼጙሲă
࢟ঢ࢟ഗख़ख़ᒋ)JQ.Q*ྙሆǖ
IP−P =
VIN − VOUT
fS × L
x
IRIPPLE = ILOAD ×
VOUT
VIN
VOUT × (VIN − VOUT )
VIN
໚ᒦǈJSJQQMF ᆐၒྜྷSNTᆬ݆࢟ഗă
ಽ፿ᑚቋ৛ါኡᐋ߱ဪ࢟ྏᒋǈࡣᔢᒫࡼནᒋገᄰਭ࣪
ዹ૦૞ຶৰ‫ހࡼۇ‬၂౶௼ࢾăᄰ‫ޟ‬ǈᆬ݆࢟ഗᏗቃࡻࡵ
ࡼၒ߲࢟ኹᆬ݆ጐᏗቃăᎅ᎖࢟ঢᒋဵ௼ࢾ࢟ঢᆬ݆࢟
ഗࡼፐႤᒄጙǈჅጲ‫ݧ‬፿୷ࡍࡼ࢟ঢᒋ୓ଢ଼ࢅၒ߲࢟ኹ
ᆬ݆ă‫ݧ‬፿ჿࠣ࢟ྏǈᏴᓞધ໭ఎਈຫൈሆถ৫૝ࡻ୷
ࢅࡼFTSਜ਼FTMă‫ݧ‬፿ჿࠣ࢟ྏဟǈᎅ᎖FTMჅ፛໦ࡼᆬ
݆࢟ኹభጲ઄൒‫ݙ‬ଐă
ঌᏲၾზሰ።ጞ౷᎖Ⴥኡᐋࡼၒ߲࢟ྏăᏴঌᏲၾზሰ
።໐ମǈၒ߲ၾମ‫ܤ‬છ೟ᆐFTS y ΔJMPBEăᏴ఼ᒜ໭ᔪ߲
न።ᒄ༄ǈၒ߲ມ‫୓ތ‬஠ጙ‫ݛ‬౫ࡍǈན௼᎖࢟ঢਜ਼ၒ߲
࢟ྏᒋăႲઁǈ఼ᒜ໭ᔫ߲ሰ።ǈࢯஂၒ߲࢟ኹᒗᎾ࿸
ࡼ࢟ኹᒋă఼ᒜ໭ሰ።ဟମན௼᎖‫ܕ‬ણࡒ౑ăৎ঱ࡼࡒ
౑௥ᎌৎ౐ࡼሰ።ဟମǈ‫ܜ‬඾࢟ኹਭࣶມಭᆮኹᒋăሮ
ᇼดྏ‫ݬ‬୅‫ޡݗ‬࿸ଐ‫ݝ‬ॊă
ၒྜྷ࢟ྏኡᐋ
ኡᐋၒྜྷ࢟ྏᎌᓐ᎖ଢ଼ࢅ౶ᔈၒྜྷ࢟Ꮞࡼ࢟ഗख़ᒋǈି
࿩೫ JD ᒦࡼఎਈᐅဉăᔐၒྜྷ࢟ྏ‫ܘ‬ኍࢀ᎖૞ࡍ᎖ሆ೰
14
D x TS x IOUT
VIN − RIPPLE
‫ޡݗ‬࿸ଐ
࢟Ꮞࠅၒ਽ၫᎅၷ૵࢛ਜ਼ጙৈഃ࢛ᔝ߅ăၷ૵࢛ᎅၒ߲
൉݆໭࢟ঢ M ਜ਼ၒ߲൉݆࢟ྏ D P ‫ޘ‬ညăၒ߲൉݆࢟ྏࡼ
FTS௼ࢾഃ࢛ăၷ૵࢛ਜ਼ഃ࢛ຫൈᎅሆါ৊߲ǖ
1
fP1_ LC = fP2 _ LC =
⎛ R + ESR ⎞
2π x L x C O x ⎜ O
⎟
⎝ RO + RL ⎠
fZ _ ESR =
1
2π x ESR x CO
໚ᒦǈS M ᆐၒ߲࢟ঢࡼ EDS )ᒇഗ࢟ᔜ*ਜ਼ด‫ݝ‬ఎਈ࢟ᔜ
SET)PO*ࡼᔐਜ਼ăSET)PO*ࡼ࢜ቯᒋᆐ35nΩ )ࢅ‫ܟ‬NPTGFU*
ਜ਼42nΩ )঱‫ܟ‬NPTGFU*ăSP ᆐၒ߲ঌᏲ࢟ᔜǈ໚ᒋࢀ᎖
ऄࢾၒ߲࢟ኹ߹ጲऄࢾၒ߲࢟ഗăFTSᆐၒ߲൉݆࢟ྏࡼ
ᔐࢀ቉ࠈೊ࢟ᔜăྙਫᎌࣶৈᄴጙቯ੓ࡼၒ߲࢟ྏ݀ೊǈ
࿟ါᒦFTSࢀ᎖࡝ৈၒ߲࢟ྏࡼFTS߹ጲၒ߲࢟ྏࡼၫ෹ă
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5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
f Z1_ EA =
1
2π × R1 × C1
f Z2 _ EA =
1
2π × R3 × C3
f P3 _ EA =
f P2 _ EA =
໚ᒦǈWQ.Q ᆐख़ख़ᒋ࢟ኹ)࢜ቯᒋ2W*ă
ᎅ᎖ၒ߲MDၷ૵࢛ࡼ་ᔜปᄂቶǈ୓JJJቯ‫ࡼޡݗ‬ೝৈഃ
࢛ຫൈ࿸ᒙᆐࢅ᎖MDၷ૵࢛ຫൈǈጲ‫ܣ‬ᄋ৙ᔗ৫ࡼሤᆡ
ᄋဍă୓ೝৈഃ࢛ຫൈ࿸ᒙᏴ MD ၷ૵࢛ຫൈࡼ 91&ǈభ
ጲࡻࡵǖ
R1 =
C3 =
1
x
L x CO x (RO + ESR)
x
L x CO x (RO + ESR)
RL + RO
0.8 x C1
1
RL + RO
0.8 x R 3
L
VOUT
LX
1
2π × R1 × C2
COUT
MAX15038
R3
OUT
1
2π × R2 × C3
C3
FB
CTL1
C1
R1
࿟ၤऱ߈૥᎖D2! ??! D3ਜ਼S4! ??! S3ࡼଣ࿸ǈকଣ࿸Ᏼࣶ
ၫ።፿ᒦ߅ೂăᑚቋ૵࢛ਜ਼ഃ࢛ࡼᆡᒙᎅ࢟Ꮞࠅၒ਽ၫ
ࡼၷ૵࢛ਜ਼FTSഃ࢛ࡼຫൈ௼ࢾă჈થဵჅ໐ᆃࡼ‫ܕ‬ણࡒ
౑ࡼ਽ၫăሆෂดྏগၤ೫ଐႯNBY26149‫ޡݗ‬Ꮔୈࡼሮ
ᇼ‫ݛ‬ᒾăࡩNBY26149ၒ߲࢟ኹ‫ۻ‬࿸ᒙᆐᎾ࿸࢟ኹဟǈS4
ᆐJDด‫࢟ݝ‬ᔜǈS5‫ࡀݙ‬Ᏼ)ᅄ4c*ă
CTL2
COMP
a) EXTERNAL RESISTIVE DIVIDER
L
VOUT
LX
COUT
MAX15038
R2
OUT
ࡩ
V
2.5 x IN
VP −P
C1 =
R
2 x π x R3 x (1+ L ) × fC
RO
R4
C2
Ᏼ࣪NBY26149஠ቲᅪ‫߈ܠݝ‬࿸ᒙဟ)ᅄ4b*ǈၒ߲࢟ኹᎅ
ሆါ௼ࢾǖ
࣪᎖1/7Wၒ߲ǈᏴGCਜ਼WPVU ᒄମೌ୻ጙৈ9/17lΩ࢟ᔜă
‫ܕ‬ણࡼਭഃຫൈgD ።ᏴఎਈຫൈgT ࡼ21&ᒗ31&ᒄମă୷
঱ࡼਭഃຫൈభጲࡻࡵৎ౐ࡼၾზሰ።ăጙࡡ g D ኡࢾǈ
D2ো௣ሆ೰ऱ߈஠ቲଐႯǖ
R2
R3
8kΩ
C3
FB
VOLTAGE
SELECT
CTL1
CTL2
R1
C1
COMP
C2
b) INTERNAL PRESET VOLTAGES
ᅄ4/! JJJቯ‫ޡݗ‬ᆀ൥
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15
NBY26149
NBY26149঱ఎਈຫൈᏤ኏‫ݧ‬፿ჿࠣၒ߲࢟ྏăᎅ᎖ჿࠣ
࢟ྏࡼFTSᄰ‫ޟ‬੪ࢅǈ࣪።ࠅၒ਽ၫഃ࢛ࡼຫൈ঱᎖࡝ᆡ
ᐐፄຫൈgDǈ݀༦কഃ࢛‫ݙ‬ถ‫ޡݗ‬ᎅ൉݆࢟ঢਜ਼ၒ߲࢟ྏ
‫ޘ‬ညࡼၷ૵࢛ăၷ૵࢛‫ޘ‬ည51eC0လ۶ຫ߈ࡼᐐፄၱିਜ਼
291°ሤጤăᇙ‫ތ‬हࡍ໭‫ܘ‬ኍ‫ޡݗ‬কᐐፄၱିਜ਼ሤጤǈጲ૝
ࡻጙৈᆮࢾࡼ౑ࡒ‫ܕ‬ણᇹᄻăፐࠥǈ‫ݧ‬፿ᅄ 4 ਜ਼ᅄ 5 ᒦჅ
ာࡼJJJቯ‫ޡݗ‬ᆀ൥ăJJJቯ‫ޡݗ‬௥ᎌྯৈ૵࢛ਜ਼ೝৈഃ࢛ǈ
໚ᒦ࢒ጙৈ૵࢛gQ2`FB ࠀ᎖ഃຫ)ᒇഗ*ăJJJቯ‫ࡼޡݗ‬໚჈
૵࢛ਜ਼ഃ࢛ᆡᒙᎅሆါ৊߲ǖ
NBY26149
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
୓࢒औৈ‫࢛૵ޡݗ‬gQ3`FB ࿸ᒙࡵg[`FTSǈభࡻࡵǖ
R2 =
CO x ESR
C3
‫ܭ‬3/! ෝါኡᐋ
MODE CONNECTION
GND
୓࢒ྯৈ‫࢛૵ޡݗ‬࿸ᒙࡵఎਈຫൈࡼ203ă‫ږ‬ᑍሆါଐႯ
D3ǖ
1
C2 =
π × R1 × ƒ S
ࡩਭഃຫൈීመ঱᎖ၷ૵࢛ຫൈဟǈ࿟ၤऱ߈భᄋ৙።
፿‫ޡݗ‬ăࡩਭഃຫൈத႒ࢀ᎖ၷ૵࢛ຫൈဟǈဣଔࡼਭ
ഃຫൈገ঱᎖ଐႯࡻ߲ࡼຫൈᒋăᏴᑚᒬ༽ౚሆǈଢ଼ࢅ
S2 ࡼ࢟ᔜᒋభିቃਭഃຫൈăࠥᅪǈྙਫਭഃຫൈࡍ᎖
311lI{ဟǈ୓JJJቯ‫ྯ࢒ࡼޡݗ‬ৈ૵࢛࿸ᒙᏴణதఎਈຫ
ൈࠀǈጲᐐଝሤᆡᎽ೟ăS4ࡼᅎୀᒋᆐ3lΩᒗ21lΩăᓖ
ፀǈྙਫᒑখ‫ܤ‬S5ᔜᒋ౶࿸ᒙ‫ݙ‬ᄴၒ߲ǈણവ‫ߒۣޡݗ‬
‫ܤݙ‬ă
``````````````````````````````` ෝါኡᐋ
NBY26149 ௥ᎌጙৈෝါኡᐋၒྜྷ)NPEF*ǈభ৙፿ઓኡ
ᐋ໭ୈࡼ৖ถෝါ)‫ݬ‬୅‫ܭ‬3*ă
Forced PWM
Unconnected or VDD/2
Forced PWM. Soft-startup into a
prebiased output (monotonic
startup).
Skip Mode. Soft-startup into a
prebiased output (monotonic
startup).
VDD
COMPENSATION
TRANSFER
FUNCTION
OPEN-LOOP
GAIN
THIRD
POLE
DOUBLE POLE
GAIN (dB)
POWER-STAGE
TRANSFER
FUNCTION
SECOND
POLE
FIRST AND SECOND ZEROS
༓ᒜQXNෝါ
୓NPEF፛୭ೌ୻ᒗHOEǈኡᒦ༓ᒜQXNෝါăᏴ༓ᒜ
QXN ෝါሆǈNBY26149 ৔ᔫᏴৼࢾࡼఎਈຫൈ)ᄰਭ
GSFR࣡ࡼ࢟ᔜ࿸ᒙ*ǈᇄᄢ൴ߡăࡩFOᒙ঱ဟǈளਭ࣢
᏷ࡼ୐ೂဟମਭઁ௓ఎဪQXN৔ᔫăࢅ‫ܟ‬ఎਈ၅ሌࡌఎǈ
৊ᔈ௟࢟ྏߠ࢟ǈጲ‫ܣ‬৊঱‫ܟ‬ఎਈᄋ৙ᐜ૵དࣅ࢟ኹă
Ᏼဟᒩᒲ໐உၦ૞ጙࡡࢅ‫ܟ‬ఎਈᇢ၃ިਭ1/986B࢟ഗ)࢜
ቯᒋ*ဟǈ‫ݙ‬൙࿟ၤ༽ౚࡼ߲ሚࠨኔྙੜǈࢅ‫ܟ‬ఎਈ௿્
ਈࣥăྙਫࢅ‫ܟ‬ఎਈᏴဟᒩᒲ໐உၦᒄ༄‫ۻ‬ਈࣥǈᐌ঱
‫ܟ‬ఎਈᏴဟମମ৆ࡼထ᎜ဟମดࡌఎǈᒇࡵ࢟ঢ࢟ഗࡉ
ࡵ1/69B૞ࡵဟᒩᒲ໐உၦဟᆐᒏă
OPERATION MODE
ᅄ5/! JJJቯ‫ޡݗ‬ာಿ
ᔫऱါጐ߂ᆐ࡝ࢯ໪ࣅǈሤਈာಿ༿‫ݬ‬ఠ ࢜ቯ৔ᔫᄂቶ
ᒦTubsujoh joup Qsfcjbtfe Pvuqvu݆ተă
Ᏼ࡝ࢯ໪ࣅෝါᒦǈࢅ‫ܟ‬ఎਈਜ਼঱‫ܟ‬ఎਈ௿ۣߒਈࣥǈ
ጲ‫ܜ‬඾࣪Ꮎມᒙၒ߲ह࢟ăࡩ GC ࢟ኹࡉࡵ TT ࢟ኹဟǈ
QXN‫ݷ‬ᔫఎဪăਜ਼༓ᒜQXNෝါಢ႒ǈQXNࣅᔫఎဪǈ
ࢅ‫ܟ‬ఎਈ၅ሌࡌఎǈ৊ᔈ௟࢟ྏߠ࢟ă
ྟ໪ࣅ஠ྜྷᎾມᒙၒ߲ෝါ)࡝ࢯ໪ࣅ*
NBY26149થถ৫໪ࣅ஠ྜྷᎾມᒙǈၒ߲঱᎖‫࢟߂ܪ‬ኹऎ
ᇄኊᆐၒ߲ᅃ཭ह࢟ǈᑚਙ৖᎖Ᏼ239ৈဟᒩᒲ໐ดᄰਭ
5 ଀ EBD ဣሚࡼࢅ‫ܟ‬ఎਈࡼᇢ࢟ഗ఼ᒜăࡩ GC ࢟ኹި߲
WSFGJO y! :3/6&ጲઁǈ࡝ࢯ໪ࣅෝါᏴ51:7ৈဟᒩᒲ໐ዓ
ဟઁᔈࣅ༤ધࡵ༓ᒜQXNෝါăࡩᅪ‫ݝ‬SFGJO࢟ኹࡼ࿟
࢟ဟମ‫ޟ‬ၫ୷ࡍဟǈऄᅪࡼዓߕဟମభऴᒏ࡝ࢯ໪ࣅᏴ
ྟ໪ࣅ໐ମਭᐁ࢐஠ྜྷ༓ᒜQXNෝါă
ࡩNPEF፛୭ॳహ૞ມᒙᒗWEE03ဟǈNBY26149ளਭྟ
໪ࣅਭ߈ઁ஠ྜྷᎾມᒙၒ߲ǈၒ߲࢟ྏ‫ݙ‬ह࢟ăᑚᒬ৔
ࡩᏴSFGJOᔫ፿ᅪ‫ݝ‬૥ᓰǈྟ໪ࣅ஠ྜྷᎾມᒙෝါဟǈჅ
Ꮴ኏ࡼᔢࡍྟ໪ࣅဟମᆐ3ntă
࠭࢒ጙৈ QXN ࣅᔫఎဪǈᇢ၃࢟ഗඡሢᄰਭด‫ ݝ‬5 ୿
EBD࢕ᐐǈᏴ239ৈဟᒩᒲ໐ᒄઁࡉࡵ8Bࡼ࢟ഗඡሢăᑚ
ዹǈ૾‫߲ܣ‬ሚፀᅪࡼᎾມᒙၒ߲ǈጐభጲຳᆮૂআᆮኹ
ၒ߲ǈ༦Ꭷఎဪኡᒦࡼ༓ᒜQXNෝါᇄਈă
16
______________________________________________________________________________________
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
QDC‫ݚ‬௜ఠ൅ਜ਼ེᄂቶ
୓NPEF፛୭ೌ୻ᒗWEEǈኡᒦᄢ൴ߡෝါăᏴᄢ൴ߡෝ
ါᒦǈNBY26149ఎਈᒑኊۣߒᏴ༵ঌᏲሆࡼၒ߲)‫ݙ‬ถ࠭
ၒ߲ᇢ၃࢟ഗ*ǈࡣᏴᒦࢀঌᏲ૞ᒮঌᏲሆǈ྆భ৔ᔫᏴ
ৼࢾຫൈQXNෝါ)ᄰਭGSFR࣡ࡼ࢟ᔜ࿸ᒙ*ăᑚᔢࡍሢ
ࣞ࢐ᄋ঱೫༵ঌᏲ቉ൈ݀ଢ଼ࢅ೫ၒྜྷஸზ࢟ഗă
றᇼࡼQDC‫ݚ‬௜࣪૝ࡻࢅᐅĂᆮࢾࡼ৔ᔫᓨზऻ‫ޟ‬ᒮገă
ᅎୀ‫ݬ‬ᑍNBY26149ຶৰ‫ݚࡼۇ‬௜౶૝ࡻᔢଛቶถăᆐࡉ
ࡵᔢଛࡼQDC‫ݚ‬௜ǈኍᔥክሆ೰ਖᐌǖ
ྙਫ߲ሚ঱‫ݾ‬ఎਈ‫ޠ‬໐ࠀ᎖హሔ૚ࣅ)ި߲9ৈဟᒩᒲ໐*
ࡼ༽ౚǈࢅ‫ݾ‬ఎਈ‫࣢ۻ‬᏷ࡌఎǈᏴ঱‫ܟ‬ఎਈࡼሆጙৈࡴ
ᄰᒲ໐༄ᒮ୐ᔈ௟࢟ྏ࿟Ⴜပࡼ࢟೟ă
3* ୓WEEĂJOਜ਼TT࿟ࡼ࢟ྏ஧భถ࢐ణதJDहᒙǈ݀༦໚
ሤ።ࡼ፛୭‫ݧ‬፿ᒇ୻ᔓሣăۣߒ৖ൈ࢐)ೌ୻ᒗQHOE*ਜ਼
ቧ੓࢐)ೌ୻ᒗHOE*৆ಭă
Ᏼᄢ൴ߡෝါᒦǈࡩ࢟ঢ࢟ഗሆଢ଼ࡵ1/3B! )࢜ቯᒋ*ဟǈࢅ
‫ܟ‬ఎਈ‫ۻ‬ਈࣥǈጲཀྵۣၒ߲࢟ྏ࿟‫્ݙ‬ഗ߲नሶ࢟ഗጲ
ૺۣᑺᔢଛࡼᓞધ቉ൈ0ᔢቃ࢟Ꮞ࢟ഗă
4* ஧భถ࢐ۣߒ࣢༦౑ࡼࡍ࢟ഗവ஼ăჁ࣢ఎਈ࢟ഗവ
஼ǈ݀஧భถ࢐ჁቃᎅMYĂၒ߲࢟ྏਜ਼ၒྜྷ࢟ྏተ߅
ࡼૄവă
঱‫ܟ‬ఎਈࡼᔢቃࡴᄰဟମ၊఼ǈཀྵۣభࡉࡵ 1/69B ࢟ഗǈ
ጲ‫ܜ‬඾హᏲᄟୈሆ߲ሚ঱ຫᅃख൴ߡ݀భถᎅ᎖ऄᅪࡼ
ఎਈႼ੒ࡒ౶࢟Ꮞ࢟ഗኸႥ࿟ဍă
5* ୓JOĂMYਜ਼QHOEॊܰೌ୻ᒗጙৈ୷ࡍࡼ१ᄵෂǈጲ
‫ۑ‬ᓐJDྲེǈ஠ጙ‫ݛ‬ᄋ঱቉ൈਜ਼‫ޠ‬໐భణቶă
૾ဧᏴ໭ୈఎ໪ဟኡᐋ೫ᄢ൴ߡෝါǈᏴྟ໪ࣅ໐ମ྆
ᎅด‫ݝ‬ኡࢾ࡝ࢯ໪ࣅෝါăࡩGC࢟ኹިਭWSFGJO y! :3/6&
ᒄઁளਭ 51:7 ৈဟᒩᒲ໐ဟǈ໭ୈᔈࣅᓞધᒗᄢ൴ߡ
ෝါă
2* ୓ၒྜྷਜ਼ၒ߲࢟ྏೌ୻ᒗ৖ൈ࢐Ǘ୓Ⴥᎌ໚჈࢟ྏೌ
୻ᒗቧ੓࢐ă
6* ཀྵۣჅᎌࡼनౣೌሣ࣢༦ᒇǈनౣ࢟ᔜਜ਼‫ޡݗ‬Ꮔୈ።
஧భถణதJDहᒙă
7* ঱ຫఎਈஂ࢛ࡼᔓሣ)ྙ MY*።কᏐಭැঢࡼෝผཌᎮ
)GCĂDPNQ*ă
ྀੜဟ઀࣒భጲ࠭ᄢ൴ߡෝါᓞધࡵ༓ᒜQXNෝါǈन
ᒄጾ཭ăၒ߲࢟ྏ።ᔗ৫ࡍǈጲ‫ܣ‬Ᏼ࿸ᒙဟମࡉࡵ༓ᒜ
QXNෝါਜ਼༵Ᏺሆᄢ൴ߡෝါჅ࣪።ࡼ‫ݙ‬ᄴᐴహ‫܈‬ඡሢ
ဟǈሢᒜ࢟ኹࡼਭߡ0ሆߡă
______________________________________________________________________________________
17
NBY26149
ᄢ൴ߡෝါ
``````````````````````````````` ፛୭๼ᒙ
``````````````````````````````` በຢቧᇦ
16
BST
17
LX
LX
18
LX
PGND
TOP VIEW
PGND
PROCESS: BiCMOS
15
14
13
``````````````````````````````` ॖᓤቧᇦ
PGND 19
12 PWRGD
PGND 20
11 FREQ
MAX15038
IN 23
*EP
4
5
6
SS
3
CTL2
2
CTL1
1
REFIN
+
VDD
EN 24
ྙኊᔢதࡼॖᓤᅪተቧᇦਜ਼੆๤‫ݚ‬௜ǈ༿‫އ‬ኯ
www.maxim-ic.com.cn/packagesă
10 OUT
IN 21
IN 22
MODE
NBY26149
5BĂ3NI{Ăଢ଼ኹቯࢯஂ໭ǈ
ดᒙఎਈ
9
FB
8
COMP
7
GND
ॖᓤಢቯ
ॖᓤ‫ܠ‬൩
ᆪ࡭‫ܠ‬੓
24 TQFN
T2444-4
21-0139
THIN QFN
*EP = EXPOSED PAD.
Nbyjn ۱ய‫ࠀူێ‬
۱ய 9439ቧረ ᎆᑶ‫ܠ‬൩ 211194
඾ॅ࢟જǖ911!921!1421
࢟જǖ121.7322 62::
ࠅᑞǖ121.7322 63::
Nbyjn‫࣪ݙ‬Nbyjn‫ޘ‬ອጲᅪࡼྀੜ࢟വဧ፿ঌᐊǈጐ‫ݙ‬ᄋ৙໚ᓜಽ኏భăNbyjnۣഔᏴྀੜဟମĂ඗ᎌྀੜᄰۨࡼ༄ᄋሆኀখ‫ޘ‬ອᓾ೯ਜ਼ਖৃࡼཚಽă
18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products
Nbyjn ဵ Nbyjn!Joufhsbufe!Qspevdut-!Jod/ ࡼᓖ‫ݿ‬࿜‫ܪ‬ă

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