Anpec APW7026 Advanced pwm and dual linear power controller Datasheet

APW7026
Advanced PWM and Dual Linear Power Control
Features
General Description
•
The APW7026 Provides the power control and
protection for three output voltages in VGA Card
applications. It integrates two PWM controllers, one
linear controller as well as the monitoring and
protection functions into a single package. One PWM
controller (PWM1) regulates the termination voltage
VTT(1.25V) with a synchronous-rectified buck
converter. The second PWM controller (PWM2)
supplies the Core power NVVDD ( 2.05V ) with a
standard buck converter . The linear controller
regulates 2.5V power for FBVDDQ.
3 Regulated Voltage are provided
• SYNC Switching Power for VTT(1.25V)
• ASYNC Switching Power for NVVDD(2.05V)
• Linear Regulator for FBVDDQ(2.5V)
•
Simple Single-Loop Control Design
• Voltage-Mode PWM Control
•
Excellent Output Voltage Regulation
• VTT Output:
:: ±1% Over Temperature
The APW7026 can monitor all the output voltages
(VTT ,NVVDD,FBVDDQ) and a single power good
signal is issued when the VTT is within ± 10% of
the reference voltage (VREF1) and the other levels
are above its lower power good threshold voltage.
Additional built-in overvoltage protection (OVP) will
be started when the VTT output is above 118% of
the VREF1.The OVP function will shutdown the upper
MOSFET and turn on the lower MOSFET
until the over-voltage is disappeared. The PWM
controllers over-current function monitors the output current by sensing the voltage drop across the
upper MOSFET rDS(ON), eliminating the need for a
current sensing resistor.
• NVVDD Output:
:: ±2% Over Temperature
• FBVDDQ Output:±2.5% Over Temperature
•
Fast Transient Response
• On-Chip Feedback Compensation
• Full 0% to 100% Duty Ratio
• Power-Good Output Voltage Monitor
• Over-Voltage and Over-Current Fault Monitors
• Small Converter Size
• Constant Frequency Operation(200kHz)
• Programmable Oscillator from 50kHz to
800KHz
Pin Description
• Reduce External Component Count
UGATE 1
Applications
• VGA Card Power Regulation
1
20 PHASE1
VCC
2
19 LGATE 1
UGATE 2
3
18 PG ND
PHASE2
4
17 OCSET1
PG OOD
5
16 VSE N1
OCSET2
6
15 FB1
FB2
7
14 FB3
V5
8
13 GATE
SS
9
12 GND
FAULT/RT 10
11 V3.3
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright  ANPEC Electronics Corp.
Rev.a.2 - Sep., 2001
1
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APW7026
Ordering information
V o lta g e C o d e
1 2 : 1 .2 5 V
P ackage C ode
K : SO P - 20
Tem p. R ange
C : 0 to 7 0 ° C
H a n d lin g C o d e
TU : Tube
TR : Tape & Reel
L e a d F re e C o d e
L : L e a d F re e D e v ic e
B la n k : O rig in a l D e v ic e
APW 7026
L e a d F re e C o d e
H a n d lin g C o d e
Tem p. R ange
P ackage C ode
V o lta g e C o d e
Block Diagram
VSEN1
FB3
LU V
O CSET1
VCC
V5
P O W E R -O N
RESET
110%
G ATE
PGOOD
V REF 3
1 .2 6 V
0 .3 V
90%
O CSET2
200uA
118%
VCC
200uA
THERMAL
P R O T E C T IO N
UG ATE2
D R IV E 2
OC2
VCC
PHASE2
GATE
CONTROL
IN H IB IT
FAULT
PW M2
S O F T -S T A R T
AN D FA U LT
L O G IC
D R IV E 1
0V
UG ATE1
OC1
PHASE1
IN H IB IT
FB2
V REF 2
2 .0 V
GATE
CONTROL
ERROR
AM P2
PW M1
ERROR
AM P1
VCC
LG ATE1
5V
LO W ER
D R IV E
V 3 .3
23K
PGND
V REF 1
O S C IL L A T O R
2 .5 V
GND
4 .1 V
4 .6 V
F A U L T /R T
SS
FB1
Absolute Maximum Ratings
Symbol
VCC
V I , VO
Parameter
Supply Voltage
Input , Output or I/O Voltage
Unit
15
V
GND -0.3 V to VCC +0.3
V
Range 0 to 70
o
C
Junction Temperature
Range 0 to 125
o
C
Storage Temperature
Range -65 to +150
o
C
300 ,10 seconds
o
C
TA
Operating Ambient Temperature
TJ
TS TG
TS
Rating
Soldering Temperature
Copyright  ANPEC Electronics Corp.
Rev. A.2 - Sep., 2001
2
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APW7026
Thermal Characteristics
Symbol
R JA
Parameter
Value
Unit
75
65
Thermal Resistance in Free Air
SOIC
SOIC (with 3in 2 of Copper)
o
C
Electrical Characteristics
1. Recommended operating conditions, Unless otherwise noted.
2. Refer to Block and Simplified Power System Diagrams , and Typical Application Schematic.
APW7026
Symbol
Parameter
Unit
Test Conditions
Min
Typ
Max
SUPPLY CURRENT
ICC
Nominal Supply Current
UGATE1, LGATE1, UGATE2, and
GATE Open
6
mA
POWER-ON RESET
Rising VCC Threshold
9.5
Falling VCC Threshold
8.2
Rising V5 Threshold
9.0
4.4
Falling V5 Threshold
10.4
3.7
4.0
185
200
V
V
4.7
V
V
OSCILLATOR
FOSC
∆VOSC
Free Running Frequency
RT = Open
Ramp Amplitude
RT = Open
215
kHz
1.9
V
1.25
V
PWM CONTROLLER REFERENCE VOLTAGE
VREF1
SYNC PWM Controller Reference
Voltage
VREF1 Accuracy
VREF2
-1
ASYNC PWM Controller Reference
Voltage
+1
2.0
VREF2 Accuracy
-2
%
V
+2
%
+2.5
%
LINEAR CONTROLLER
VREF3
Reference Voltage
GATE=FB3
1.26
VREF3 Accuracy
GATE Drive Current
-2.5
VGATE=4V
20
V
50
mA
1.0
A
PWM CONTROLLERS GATE DRIVERS
IUGATE
UGATE1,2 Source
RUGATE
UGATE1,2 Sink
VCC = 12V, VUGATE1 (or VUGATE2 ) = 1V
2.2
ILGATE
LGATE1 Source
VCC = 12V, VLGATE1 = 1V
1.0
RLGATE
LGATE1 Sink
VCC = 12V, VLGATE1 = 1V
1.6
Copyright  ANPEC Electronics Corp.
Rev. A.2 - Sep., 2001
VCC = 12V, VUGATE1 (or VUGATE2 ) = 6V
3
3.5
Ω
A
3.0
Ω
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APW7026
Electrical Characteristics Cont.
1. Recommended operating conditions, Unless otherwise noted.
2. Refer to Block and Simplified Power System Diagrams , and Typical Application Schematic.
APW 7026
Sym bol
P a ra m e te r
U n it
T e s t C o n d itio n s
M in
Ty p
M ax
P R O T E C T IO N
V S E N 1 O . V . t r ip p o in t ( V S E N 1 / V R E F 1 )
V S E N 1 R is i n g
V S E N 1 O . V . H y s t e r e s is
V 3 . 3 O . V . t r i p p o in t
V 3 . 3 R is i n g
V 3 . 3 O . V . H y s t e r e s is
lO V P
R
SS
POW ER
F A U L T S o u r in g C u r r e n t
V F A U LT /R T = 2 . 0 V
O C S E T 1 ,2 C u rre n t S o u rc e
V o c s e t = 4 .5 V
170
11 8
%
2
%
4 .1
V
0 .1
V
25
mA
200
230
uA
23
KΩ
V S E N 1 R is i n g
11 0
%
V S E N 1 L o w e r T h r e s h o ld
V S E N 1 R is i n g
94
%
V S E N 1 P G D H y s t e r e s is
U p p e r / L o w e r T h r e s h o ld
2
%
V 3 . 3 L o w e r T h r e s h o ld
V 3 . 3 R is i n g
2 .5
V
P u l l u p r e s is t o r t o 5 V
GOOD
V S E N 1 U p p e r T h r e s h o ld
(V S E N 1 /V R EF1)
V 3 . 3 P G D H y s t e r e s is
F B 3 L o w e r T h r e s h o ld
V F B 3 R is i n g
F B 3 P G D H y s t e r e s is
V PGOOD
P G O O D V o lt a g e L o w
0 .1
V
1 .0
V
0 .1
lP G O O D = - 4 m A
V
0 .8
V
Functional Pin Description
UGATE1 (Pin 1)
Connect UGATE1 pin to the SYNC PWM Converter’s
of the reference voltage (VREF1) or when V3.3 or VFB3 is
below its lower power good threshold.
upper MOSFET gate .This pin provides the gate drive
for the upper MOSFET.
OCSET2 (Pin 6)
Connect a resistor (ROCSET ) from this pin to the drain of
VCC (Pin 2)
Provide a + 12V bias supply for the IC to this pin . This
the ASYNC PWM converter’s MOSFET . ROCSET, an
pin also provides the gate bias charge for all the
MOSFETs controlled by the IC. The voltage at this pin is
MOSFET’s on-resistance (rDS(ON)) set the converter’s
internal
200µA
current
source (IOCSET ) , and the
over-current (OC) trip point according to the following
equation:
monitored for Power-On Reset (POR) purpose.
UGATE2 (Pin 3)
Connect UGATE2 pin to the ASYNC PWM converter’s
MOSFET gate . This pin provides the gate drive for the
IPEAK =
MOSFET.
PHASE2 (Pin 4)
IO CSET x ROCSET
rDS(ON)
An over-current trip cycles the soft-start function.
FB2 (Pin 7)
Connect this pin to the output of the ASYNC PWM
Connect the PHASE2 pin to the ASYNC PWM
converter’s MOSFET source. This pin is used to monitor
converter . The voltage at this pin is regulated to the
reference voltage VREF2 . A resistor driver is connected
the voltage drop across the MOSFET for over-current
protection.
from this pin to VOUT2(ROUT2) and to GND(RGND2) that sets
the output voltage as the following equation :
PGOOD (Pin 5)
PGOOD is an open drain output used to indicate the
status of the output voltages. This pin is pulled low when
the SYNC PWM regulator output is not within ± 10%
Copyright  ANPEC Electronics Corp.
Rev. A.2 - Sep., 2001
4
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APW7026
Functional Pin Description Cont.
R
OUT2
) x VREF2
VOUT2 = ( 1+ R
GND2
pass MOSFET.
FB3 (Pin 14)
Connect this pin to the output of the linear regulator . A
The value of the resistor connected from VOUT2 to FB2 must
be less than 150Ω .
resistor driver is connected from this pin to VOUT3 and
GND that sets the output voltage as same as VOUT2. This
V5 (Pin 8)
The +5V input voltage at this pin is monitored for power-on
pin is monitored for power good function.
FB1 (Pin 15)
reset (POR) purpose.
SS (Pin 9)
This pin provides the feedback for the SYNC PWM
converter. Typically this pin can be connected directly to
This pin provides the soft-start for the all PWM converters
and linear regulator . An internal resistor charges an
the output of the converter . However , a resistor
divider is recommended to be connected from this pin to
external capacitor that is connected from 5V supply to
this pin which ramps up the all outputs , preventing the
VOUT1 and GND to adjust the output voltage as same as
VOUT2. The value of the resistor connected from VOUT1 to
outputs from overshooting as well as limiting the input
current . The second function of the soft-start cap is to
FB1 must be less than 200Ω.
VSEN1 (Pin 16)
provides long off time for the synchronous MOSFET during
current limiting .
FAULT / RT (Pin 10)
This pin
provides
oscillator
switching
This pin is connected to the SYNC PWM converter’s
output voltage . The PGOOD and OVP comparator
cicuits use this signal to report output voltage status
and over-voltage protection.
frequency
adjustment . By placing a resistor ( RT ) from this pin to
GND , the nominal 200kHz switching
frequency is
increased .Conversely, connecting a pull-up resistor ( RT )
OCSET1 (Pin 17)
Connect a resistor (ROCSET ) from this pin to the drain of
the SYNC PWM converter’s upper MOSFET . The
from this pin to VCC reduces the switching frequency.
Nominally , the voltage at this pin is 1.26V. In the event of
an over-voltage or over-current
internally pulled to VCC.
over-current (OC) trip point for the SYNC PWM
converter is set by the ROCSET as same as the OCSET2.
condition , this pin is
An over-current trip cycles the soft-start function.
PGND (Pin 18)
V3.3 (Pin 11)
This pin is connected to the +3.3V or the output of the
This is the power ground connection . Tie the SYNC
PWM converter’s lower MOSFET source to this pin.
ASYNC PWM converter for power good and
over-voltage detection. When the output voltage of the
LGATE1 (Pin 19)
Connect LGATE1 to the SYNC PWM converter’s lower
ASYNC PWM converter is not in the range from 3V to
4V, connect this pin to +3.3V voltage.
MOSFET gate . This pin provides the gate drive for the
lower MOSFET.
GND (Pin 12)
Signal ground for the IC. All voltage levels are measured
PHASE1 (Pin 20)
Connect the PHASE1 pin
with respect to this pin.
GATE (Pin 13)
Connect this pin to the gate of an external MOSFET.
This pin provides the drive for the linear regulator’s
Copyright  ANPEC Electronics Corp.
Rev. A.2 - Sep., 2001
to the SYNC PWM
Converter’s upper MOSFET source. This pin is used
to monitor the voltage drop across the upper MOSFET
for over-current protection.
5
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APW7026
Typical Performance Curves
10000
RT ( kΩ )
1000
RT pull up
to +12V
100
10
RT pull down to G ND
1
50
150
250
350
450
550
650
750
Reference Voltage Deviation(VREF2 )
Reference Voltage Deviation(VREF1 )
Switching Frequency ( kHz )
1.0%
0.8%
0.6%
0.4%
0.2%
0.0%
-0.2%
-0.4%
-0.6%
-0.8%
-1.0%
0
25
50
75
100
125
o
Reference Voltage Deviation(VREF1 )
Junction Temperature ( C)
1.0%
0.8%
0.6%
0.4%
0.2%
0.0%
-0.2%
-0.4%
-0.6%
-0.8%
-1.0%
0
25
50
75
100
125
o
Junction Temperature ( C)
1.0%
0.8%
0.6%
0.4%
0.2%
Note : The Referance Voltage(VREF) Deviation is
0.0%
-0.2%
VREF(TJ) - VREF(25oC)
-0.4%
-0.6%
x 100%
VREF(25oC)
TJ is Junction Temperature.
-0.8%
-1.0%
rt
0
25
50
75
100
125
Junction Temperature (oC)
Copyright  ANPEC Electronics Corp.
Rev. A.2 - Sep., 2001
6
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APW7026
Simplified Power System Diagram
+3.3v
+5V
Q3
VOUT2
+3.3V
Q1
ASYNC
PWM
Controller
SYNC
PWM
Controller
Q4
Linear
Controller
VOUT1
Q2
VOUT3
Typical Application Circuit
C812
220pF
RX1
10R
C809
220pF
L800
2uH
L802
2uH
R817
1.2K
+12V
AGP
3.3V
+5V
C807
330uF
C801
1uF
R812
1.5k
C808
330uF
C813
330uF
R819
5.1R
Q802
APM9410
R813
5.1R
L801
7.8uH
1
2
NVVDD
2.05V/4A
3
C810
330uF
R814
100RF
C811
330uF
4
D800
FM5820
5
6
VCC
UGATE2
PHASE2
PGOOD
L803
Q803B 7.8uH
APM7313
R820
5.1R
UGATE1
PHASE1
20
LGATE1
19
PGND
18
OCSET1
17
VSEN1
16
FB1
OCSET2
C814
10uF
Q803A
APM7313
VTT
1.25V/3.5A
C816
330uF
C815
330uF
R821 R824
0R NC
15
7 FB2
5V
8
C805
1uF
9
10
V5
FB3
14
SS
GATE
13
FAULT/RT
GND
V3.3
R816
4.02KF
Q800
APM3055
12
11
APW7026-12
R811
100RF
Copyright  ANPEC Electronics Corp.
Rev. A.2 - Sep., 2001
AGP
3.3V
C802
330uF
7
R810
97.6RF
FBVDDQ
2.5V/1.5A
C817
330uF
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APW7026
Packaging Information
SO – 300mil ( Reference JEDEC Registration MS-013)
D
N
H
GAUGE
PLANE
E
1
2
3
A
Dim
Millimeters
Min.
Max.
1
A1
B
e
L
Variations- D
Variations Min.
Max.
Dim
Inches
Min.
Max.
Variations- D
Variations Min. Max.
A
2.35
2.65
SO-16
10.10
10.50
A
0.093 0.1043
SO-16
0.398 0.413
A1
0.10
0.30
SO-18
11.35
11.76
A1
0.004 0.0120
SO-18
0.447 0.463
B
0.33
0.51
SO-20
12.60
13
B
0.013
0.020
SO-20
0.496 0.512
D
See variations
SO-24
15.20
15.60
D
See variations
SO-24
0.599 0.614
E
7.40
SO-28
17.70
18.11
E
0.2914 0.2992
SO-28
0.697 0.713
SO-14
8.80
9.20
e
0.050BSC
SO-14
0.347 0.362
e
7.60
1.27BSC
H
10
10.65
H
0.394
0.419
L
0.40
1.27
L
0.016
0.050
N
See variations
N
See variations
φ1
0°
φ1
8°
Copyright  ANPEC Electronics Corp.
Rev. A.2 - Sep., 2001
8
0°
8°
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APW7026
Physical Specifications
Terminal Material
Lead Solderability
Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb), 100%Sn
Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3.
Reflow Condition
(IR/Convection or VPR Reflow)
tp
TP
C ritical Zone
T L to T P
T e m p e ra tu re
R am p-up
TL
tL
T sm ax
T sm in
R am p-down
ts
Preheat
25
t 25 °C to Peak
T im e
Classificatin Reflow Profiles
Profile Feature
Sn-Pb Eutectic Assembly
Large Body
Small Body
Average ramp-up rate
3°C/second max.
(TL to TP)
Preheat
- Temperature Min (Tsmin)
100°C
- Temperature Mix (Tsmax)
150°C
- Time (min to max)(ts)
60-120 seconds
Tsmax to TL
- Ramp-up Rate
Tsmax to TL
- Temperature(TL)
183°C
- Time (tL)
60-150 seconds
Peak Temperature(Tp)
225 +0/-5°C
240 +0/-5°C
Time within 5°C of actual Peak
10-30 seconds
10-30 seconds
Temperature(tp)
Ramp-down Rate
6°C/second max.
6 minutes max.
Time 25°C to Peak Temperature
Pb-Free Assembly
Large Body
Small Body
3°C/second max.
150°C
200°C
60-180 seconds
3°C/second max
217°C
60-150 seconds
245 +0/-5°C
250 +0/-5°C
10-30 seconds
20-40 seconds
6°C/second max.
8 minutes max.
Note: All temperatures refer to topside of the package. Measured on the body surface.
Copyright  ANPEC Electronics Corp.
Rev. A.2 - Sep., 2001
9
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APW7026
Reliability test program
Test item
Method
Description
SOLDERABILITY
MIL-STD-883D-2003
245°C , 5 SEC
HOLT
MIL-STD-883D-1005.7
1000 Hrs Bias @ 125 °C
PCT
JESD-22-B, A102
168 Hrs, 100 % RH , 121°C
TST
MIL-STD-883D-1011.9
-65°C ~ 150°C, 200 Cycles
ESD
MIL-STD-883D-3015.7
VHBM > 2KV, VMM > 200V
Latch-Up
JESD 78
10ms , Itr > 100mA
Tape & Reel Dimensions
t
D
P
Po
E
P1
Bo
F
W
Ko
Ao
D1
T2
J
C
A
B
T1
Application
A
B
C
J
T1
T2
W
P
E
SOP- 28
330±1
62 ±1.5
12.75 ± 0. 5
2 ± 0.6
24.4 ± 0.2
2± 0.2
24 ± 0.3
12 ± 0.1
1.75± 0.1
Application
F
D
D1
Po
P1
Ao
Bo
Ko
t
1.5+ 0.25
4.0 ± 0.1
SOP- 28
11.5 ± 0.1 1.5 +0.1
2.0 ± 0.1 10.85 ± 0.1 18.34± 0.1 2.97± 0.1 0.35±0.01
(mm)
Copyright  ANPEC Electronics Corp.
Rev. A.2 - Sep., 2001
10
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APW7026
Cover Tape Dimensions
Application
SOP- 28
Carrier Width
24
Cover Tape Width
21.3
Devices Per Reel
1000
Customer Service
Anpec Electronics Corp.
Head Office :
5F, No. 2 Li-Hsin Road, SBIP,
Hsin-Chu, Taiwan, R.O.C.
Tel : 886-3-5642000
Fax : 886-3-5642050
Taipei Branch :
7F, No. 137, Lane 235, Pac Chiao Rd.,
Hsin Tien City, Taipei Hsien, Taiwan, R. O. C.
Tel : 886-2-89191368
Fax : 886-2-89191369
Copyright  ANPEC Electronics Corp.
Rev. A.2 - Sep., 2001
11
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