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APW7036
Advanced Dual PWM Power Controller
Features
*
2 Regulated Voltage are provided
General Description
The APW7036 provides complete power control and protection for two DC-DC converter optimized in VGA Card applications. It integrates two PWM controllers , as well as the monitoring and protection function into a single package. The APW7036 provides simple , single feedback loop , voltage mode control with fast transient response. The output voltage of the SYNC converter can be precisely regulated to as low as VREF (1.25V , 1.5V , 1. 8V and 2.05V) , with a maximum tolerence of 1.0% over temperature. The APW7036 can provides in excess of 14A of output current for an on-board DC/DC converter. It can monitors all the output voltage , and a single Power Good signal is issued when the SYNC output is within 10% of the VREF setting and the ASYNC output levels is above under-voltage levels. Additional built-in over-voltage protection for the SYNC output uses the lower MOSFET to prevent output voltage above 115% of the VREF setting. The PWM controller's over-current function monitor the output current by sensing the voltage drop across the upper MOSFET's RDS(ON) , eliminating the need for a current sensing resistor .
- SYNC Switching Power Internal Reference
Voltage (1.25V , 1.5V , 1.8V and 2.05V)
- ASYNC Switching Power Internal Reference
Voltage (1.5V)
* *
Simple Single-Loop Control Design
- Voltage-Mode PWM Control
Excellent Output Voltage Regulation
- SYNC Output : 1% Over Temperature - ASYNC Output : 3% Over Temperature *
Fast Transient Response
- High-Bandwidth Error Amplifier - 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 - Reduce External Component Count *
20Pin , SOIC Package
Pin Description
UGATE VCC GATE 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 PHASE1 LGATE PGND OCSET1 VSEN FB1 COMP NC GND VAUX
Applications
* *
High Power 5V to 2.5 or 3.3V DC-DC Regulator VGA Card Power Regulation
PHASE2 PGOOD OCSET2 FB2 SS FAULT/RT NC
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. www..com Copyright ANPEC Electronics Corp. 1 www.anpec.com.tw Rev. A.1 - May, 2001 www..com www..com
APW7036
Ordering Information
APW 7036
Lead Free Code Handling Code Tem p. Range Package Code Voltage Code Voltage Code 12 : 1.25V 15 : 1.50V 18 : 1.80V 20 : 2.05V Package Code K : SO P-20 Tem p. Range C : 0 to 70 C Handling Code TU : Tube TR : Tape & Reel Lead Free Code L : Lead Free Device Blank : O riginal Device
Block Diagram
VSEN OCSET1 VCC
110%
OCSET2
200uA VCC 90%
PGOOD
GATE PHASE2
DRIVE2
OC2 115% 200uA
POR
VAUX
INHIBIT GATE CONTROL PWM2 FAULT SOFT-START AND FAULT LOGIC 0V OC1 INHIBIT ERROR AMP2 ERROR AMP1 GATE CONTROL PWM1 VCC DRIVE1
VCC
UGATE PHASE1
FB2
1.5V
LGATE
VCC 28uA V REF 1.05V
OSCILLATOR
LOWER DRIVE
PGND
GND
4.5V
FAULT
SS
FB1
COMP
Absolute Maximum Ratings
Symbol VCC VI , VO TA TJ TSTG TS Parameter Supply Voltage Input , Output or I/O Voltage Operating Ambient Temperature Range Junction Temperature Range Storage Temperature Range Soldering Temperature Rating 15 GND -0.3 V to V12 +0.3 0 to 70 0 to 125 -65 to +150 300 ,10 seconds Unit V V C C C C
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Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001
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APW7036
Thermal Characteristics
Symbol R JA Parameter Thermal Resistance in Free Air SOIC SOIC (with 3in2 of Copper) Value 75 65 Unit C/W
Electrical Characteristics
(Recommended operating conditions , Unless otherwise noted) Refer to Block and Simplified Power System Diagrams , and Typical Application Schematic APW7036 Unit Symbol Parameter Test Conditions Min. Typ. Max. VCC Supply Current
ICC Nominal Supply Current UGATE , LGATE , GATE , open Vocset=4.5V Vocset=4.5V Vocset=4.5V Vocset=4.5V 9 mA
Power-on Reset Rising VCC Threshold Falling VCC Threshold Rising VAUX Threshold VAUX Threshold Hysteresis Rising VOCSET Threshold Oscillator FOCS Free Running Frequency Ramp Amplitude 10.4 8.2 2.5 0.5 1.26 185 200 1.9 1.25 1.50 1.80 2.05 -1.0 1.5 -3.0 88 15 6 1 3.5 +3.0 +1.0 215 V V V V V kHz VP-P V
VOSC Switching Controller Reference Voltage VREF Reference Voltage APW7036-12 APW7036-15 APW7036-18 APW7036-20 Reference Voltage accuracy VFB2 Reference Voltage Reference Voltage accuracy Synchronous PWM Controller Error Amplifier DC Gain GBWP Gain-Bandwidth Product SR Slew Rate COMP=10pF PWM Controllers Gate Drivers IUGATE UGATE1,GATE Source RUGATE UGATE1,GATE Sink VCC=12V, VUGATE 1,GATE=6V VUGATE1,GATE =1V
RT= Open RT= Open
% V % dB MHz V/s A
Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001
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APW7036
Electrical Characteristics Cont.
Symbol Parameter Test Conditions APW7036 Min. Typ. Max. 1 3 115 8.5 200 28 120 230 Unit
PWM Controllers Gate Drivers ILGATE LGATE Source RLGATE LGATE Sink Protection VSEN Over-Voltage (VSEN/VREF) IOVP FAULT Souring Current IOCSET OCSET1,2 Current Source ISS Soft Start Current Power Good VSEN Upper Threshold (VSEN/VREF) VSEN Under Voltage (VSEN/VREF) VSEN Hysteresis (VSEN/VREF) VPGOOD PGOOD Voltage Low
VCC=12V, VLGATE=1V VLGATE= 1V VSEN Rising VFAULT/RT=2.0V VOCSET= 4.5VDC
A % mA A A % % % 0.8 V
170
VSEN1 Rising VSEN1 Rising Upper /Lower Threshold IPGOOD= -4mA
110 94 2
Functional Pin Description
UGATE (Pin 1) Connect UGATE pin to the synchronous PWM converter's upper MOSFET gate. This pin provides the gate drive for the upper MOSFET. VCC (Pin 2) Provide a 12V bias supply for the IC to this pin. This pin also provides the gate bias charge for all the MOSFETs controlled by the IC. The voltage at this pin is monitored for Power-On Reset purposes. GATE (Pin 3) No Connection. Connect GATE pin to the standard BUCK PWM converter's MOSFET gate. This pin provides the gate drive for the MOSFET. PHASE2 (Pin 4) Connect the PHASE2 pin to the standard BUCK PWM OCSET1 , 2 (Pin 17 , 6) Connect a resistor (ROCSET ) from this pin to the drain of the PWM converter's MOSFET. ROCSET , an internal 200A current source (IOCSET ) , and the MOSFET's on-resistance(rDS(ON)) set the converter over-current converter's MOSFET source. This pin is used to monitor the voltage drop across the MOSFET for over-current protection. PGOOD (Pin 5) PGOOD is an open collector output used to indicate the status of the output voltages. This pin is pulled low when the synchronous regulator output is not within 10% of the reference voltage or the other output is below under-voltage thresholds. NC (Pin 10, 13)
Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001
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APW7036
Functional Pin Description Cont.
(OC) trip point according to the following equation: IOCSET * ROCSET I
PEAK
=
rDS(ON)
synchronous PWM regulator error amplifier. The FB1 pin is the inverting input of the error amplifier. Similarly , the COMP pin is the error amplifier output. These pins are used to compensate the voltage-mode control feedback loop of the synchronous PWM converter. VSEN (Pin 16) This pin is connected to the synchronous PWM converters's output voltage. The PGOOD and OVP comparator circuits use this signal to report output voltage status and for over-voltage protection. PGND (Pin 18) This is the power ground connection. Tie the synchronous PWM converter's lower MOSFET source to this pin. LGATE (Pin19) Connect LGATE to the synchronous PWM converter's lower MOSFET gate. This pin provides the gate drive for the lower MOSFET. PHASE1 (Pin 20) Connect the PHASE1 pin to the synchronous PWM converter's upper MOSFET source. This pin is used to monitor the voltage drop across the upper MOSFET for over-current protection.
An over-current trip cycles the soft-start function. FB2 (Pin 7) This pin provides the feedback for the non-synchronous switching regulator. A resistor driver is connected from this pin to regulator output and GND that sets the output voltage. The value of the resistor connected from regulator output to FB2 must be less than 150 . SS (Pin 8) Connect a capacitor from this pin to ground. This capacitor , along with an internal 28A current source , sets the soft-start interval of the converter. FAULT / RT (Pin 9) This pin provides oscillator switching 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 ) 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 condition , this pin is internally pulled to VCC. VAUX (Pin 11) The +3.3V input voltage at this pin is monitored for power-on reset (POR) purposes. GND (Pin 12) Signal ground for the IC. All voltage levels are measured with respect to this pin. COMP and FB1 (Pins 14 , and 15) COMP and FB1 are the available external pins of the
Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001 5
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APW7036
Simplified Power System Diagram
+ 5 V IN
Q1 Q3 V OUT2 Standard Buck PWM Controller Synchronous PWM Controller V OUT1 Q2
APW7036
Typical Characteristics
R1 10R +12V C1 1uF
C2 220pF
L1 1uH +5V
C8 220pF
1 UGATE VCC GATE PHASE2 PGOOD OCSET2 FB2 SS FAULT NC PHASE1 LGATE PGND OCSET1 VSEN FB1 COMP NC GND VAUX 20 19 18 17 16 15 14 13 12 11
R3 5.1R
R2 1.2K Q1A APM7313
C3 330uF
+5V C10 330uF Q2 APM9410 VOUT2 (3.3V) R12 1.2K R13 5.1R
2 3 4 5 6 7
R4 5.1R
L2 7.8uH Q1B APM7313 C4 330uF R5 67RF C5 330uF
VOUT1 (2.5V)
L3 7.8uH R9 120RF C11 330uF D1 FM5800 C9 0.1uF
8 9 10
C6 10pF
R7 3K
APW7036-15
R11 750 +5V LP1 LED +3.3V C2 2700pF R8 150K
R6 100RF
R10 100RF
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APW7036
Typical Characteristics
10000
1000
RT ( k )
100
to +12V RT pull up RT pull down to GND
10
1 50 150 250 350 450 550 650 750
Switching Frequency ( kHz )
1.0% 0.8% 0.6% 0.4%
1.0% 0.8%
VFB2 Reference Voltage deviation (%)
0 10 20 30 40 50 60 70 80 90 100
0.6% 0.4% 0.2% 0.0% -0.2% -0.4% -0.6% -0.8% -1.0% 0 10 20 30 40 50 60 70 80 90 100
VREF Voltage deviation (%)
0.2% 0.0% -0.2% -0.4% -0.6% -0.8% -1.0%
Junction Temperature (oC)
Junction Temperature (oC)
VREF(TJ ) - VREF(25 oC) VREF (25oC)
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Note : The Referance Voltage(VREF ) Deviation is
x 100%
Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001
APW7036
Package Information
SO - 300mil ( Reference JEDEC Registration MS-013)
D
h*45
C H E GAUGE PLANE
1
2
3
A e B A1 L 1
Dim A A1 B C D E e H h L 1
Millimeters Min. 2.35 0.10 0.33 0.23 Max. 2.65 0.30 0.51 0.32
Variations Variations SO-20 SO-24 SO-28 Min. 12.60 15.20 17.70 Max. 13.0 15.60 18.11
Dim A A1 B C D E e H h L 1
Inches Min. 0.093 0.004 0.013 Max. 0.1043 0.0120 0.020
Variations Variations SO-20 SO-24 SO-28 Min. 0.496 0.599 0.697 Max. 0.512 0.614 0.713
0.0091 0.0125 See variations 0.2914 0.2992 0.050BSC 0.394 0.010 0.016 0 0.419 0.029 0.050 8
See variations 7.40 7.60 1.27BSC 10 10.65 0.25 0.40 0 0.75 1.27 8
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APW7036
Physical Specifications
Terminal Material Lead Solderability Packaging Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb) Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3. 1000 devices per reel
Reflow Condition
TP
(IR/Convection or VPR Reflow)
tp C ritical Z one T L to T P
R am p-up
T e m p e ra tu re
TL T sm ax
tL
T sm in R am p-down ts Preheat
25
t 25 C to Peak
Classificatin Reflow Profiles
Profile Feature
T im e
Pb-Free Assembly Large Body Small Body 3C/second max. 150C 200C 60-180 seconds 3C/second max 217C 60-150 seconds 245 +0/-5C 250 +0/-5C 10-30 seconds 20-40 seconds
Sn-Pb Eutectic Assembly Large Body Small Body
Average ramp-up rate 3C/second max. (TL to TP) Preheat - Temperature Min (Tsmin) 100C - Temperature Mix (Tsmax) 150C - Time (min to max)(ts) 60-120 seconds Tsmax to TL - Ramp-up Rate Tsmax to TL - Temperature(TL) 183C - Time (tL) 60-150 seconds Peak Temperature(Tp) 225 +0/-5C 240 +0/-5C Time within 5C of actual Peak 10-30 seconds 10-30 seconds Temperature(tp) Ramp-down Rate 6C/second max. 6 minutes max. Time 25C to Peak Temperature
Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001 9
6C/second max. 8 minutes max.
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Note: All temperatures refer to topside of the package. Measured on the body surface.
APW7036
Reliability test program
Test item SOLDERABILITY HOLT PCT TST ESD Latch-Up Method MIL-STD-883D-2003 MIL-STD-883D-1005.7 JESD-22-B, A102 MIL-STD-883D-1011.9 MIL-STD-883D-3015.7 JESD 78 Description 245C , 5 SEC 1000 Hrs Bias @ 125 C 168 Hrs, 100 % RH , 121C -65C ~ 150C, 200 Cycles VHBM > 2KV, VMM > 200V 10ms , Itr > 100mA
Tape & Reel Dimensions
t Po P P1 D
E
F W
Bo
Ao
Ko D1 T2
J C A B
T1
Application
SOP-20 Application SOP-20
A 3301 F 11.5 0.1
B 62 1.5 D 1.5+0.1
C 12.75 0.15 D1 1.5+0.25
J 2 + 0.6 Po 4.0 0.1
T1 24.4 +0.2 P1 2.0 0.1
T2 2 0.2 Ao 8.2 0.1
W 24 + 0.3 - 0.1 Bo 13 0.1
P 12 0.1 Ko
E 1.75 0.1 t
2.5 0.1 0.350.013
(mm)
Copyright ANPEC Electronics Corp. Rev. A.1 - May, 2001 10 www.anpec.com.tw
APW7036
Cover Tape Dimensions
Application SOP- 20 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
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