8-PIN Synchronous Buck Controller Operating with Single Input Dri
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APW7037/A/B
8-PIN Synchronous Buck Controller
Operating with Single Input Drives N-Channel MOSFETs Simple Single-Loop Control Design
General Description
APW7037 series designed provide cost synchronous Buck regulator on-board converter applications. APW7037 series together with dual N-channel MOSFETs such APM7313, provide cost solution such applications. Each device features internal 200/ 400kHz oscillator, Power-On-Reset (POR) both supplies, external programmable soft-start function well output under-voltage detection that latches device when output short detected.
Voltage-Mode Control Full 100% Duty Ratio Fast Transient Response Output Voltage Accuracy Over Temperature Under-Voltage Protection Output 200/400kHz Constant Frequency Operation
-200kHz APW7037 APW7037B -400kHz APW7037A
Small size, 8-PIN Package (SOIC TSSOP) Lead Free Available (RoHS Compliant)
Description
Applications
Graphics Cards Memory Power Supply Memory Termination Voltage Low-Voltage Distributed Power Supplies
LDRV
COMP HDRV
ANPEC reserves right make changes improve reliability manufacturability without notice, advise customers obtain latest version relevant information verify before placing orders. Copyright ANPEC Electronics Corp. Rev. 2005 www.anpec.com.tw
APW7037/A/B
Ordering Marking Information
7037/A/B
Lead Free Code Handling Code Temp. Range Package Code 7037/A/B XXXXX 7037/A/B XXXXX Package Code SO-8 TSSOP-8 Operating Junction Temp. Range 70°C Handling Code Tube Tape Reel Lead Free Code Lead Free Device Blank Original Device XXXXX Date Code
7037/A/B
7037/A/B
XXXXX Date Code
Notes: ANPEC lead-free products contain molding compounds/die attach materials 100% matte plate termination finish; which fully compliant with RoHS compatible with both SnPb lead-free soldiering operations. ANPEC lead-free products meet exceed lead-free requirements IPC/JEDEC STD-020C classification lead-free peak reflow temperature.
Block Diagram
20uA 4.5V 3.3V 64uA Regulator
HDRV
Under-V oltage Gate Control
Error FOSC
LDRV
Absolute Maximum Ratings
Description Operating Junction Temperature Storage Temperature Soldering Temperature Seconds) Minimum Rating
Copyright ANPEC Electronics Corp. Rev. Apr, 2005
Rating -0.2~30 -0.2~30 0~125 -65~150
Unit
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APW7037/A/B
Thermal Characteristics
Symbol Parameter Thermal Resistance Free 8-pin SOIC 8-pin TSSOP Value Unit °C/W
Electrical Characteristics
Unless otherwise specified, these specifications apply over VCC=5V, VC=12V TA=0 70°C. Typical values refer TA=25°. APW7037/A/B Symbol Parameter Test Conditions Min. Typ. Max. SUPPLY CURRENT ICCQ Dynamic Supply Current Dynamic Supply Current Static Supply Current Static Supply Current Rising Threshold Hysteresis Rising Threshold Hysteresis OSCILLATOR APW7037 FOSC VOSC IFB1 IFB2 Free Running Frequency Ramp Amplitude Input Bias Current Input Bias Current Transconductance SS=3V, VFB=1V SS=0V, VFB=1V APW7037A APW7037B ERROR AMPLIFIER µmho 1.10 FOSC=200KHz, CL=1500pF FOSC=200KHz, CL=1500pF SS=GND SS=GND 0.25 Unit
POWER-ON RESET
REFERENCE VOLTAGE APW7037 1.225 1.250 1.275 LREG Regulation Voltage Line Regulation 5~12V
APW7037A APW7037B 0.784 0.800 0.816 0.35
Copyright ANPEC Electronics Corp. Rev. Apr, 2005
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APW7037/A/B
Electrical Characteristics (Cont.)
Unless otherwise specified, these specifications apply over VCC=5V, VC=12V TA=0 70°C. Typical values refer TA=25°C. APW7037/A/B Symbol GATE DRIVERS HDRV Rising Time HDRV Falling Time LDRV Rising Time LDRV Falling Time Dead Band Time PROTECTION VFBUV Under-Voltage Threshold Falling APW7037 APW7037A APW7037B Shutdown Threshold Voltage Pull voltage Soft-Start Current SS=0 1500pF 1500pF 1500pF 1500pF Parameter Test Conditions Min. Typ. Max. Unit
Functional Description
(Pin Connect this output (VOUT) converter external resistor divider provide voltage feedback path converter. output voltage resistor divider determined using following formula VOUT VREF
measured with respect this pin. HDRV (Pin Connect this gate high-side power MOSFET. This provides gate drive MOSFET. (Pin This provides bias voltage high-side MOSFET driver. bootstrap circuit used pump boot voltage enforcing driving capability gate driver improving performance MOSFET. COMP (Pin This output error amplifier. external resistor-capacitor network provide loop compensation converter. (Pin Connect capacitor from this ground.This capacitor, along with internal 20uA current source, sets soft-start interval converter prevents outputs from overshoot well limits input current. Pull this below 0.5V shutdown converter.
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where ROUT resistor connected from VOUT RGND resistor connected from ground. voltage this also monitored UnderVoltage protection. (Pin Connect this input voltage from 20V. This provides bias control circuitry low-side power MOSFET driver (LDRV). voltage this monitored Power-On Reset (POR) purpose. LDRV (Pin Connect this gate low-side power MOSFET. This provides gate drive MOSFET. (Pin Signal power ground voltage levels
Copyright ANPEC Electronics Corp. Rev. Apr, 2005
APW7037/A/B
Typical Applications
Dual supply voltage(5V 12V) application
100uF
47uF
2300A 0.1uF
HDRV
7037
LDRV
7313
3.3uH 1.5V
Shutdown
7313 1.24k
C6,C9 150uF
2200pF
Single supply voltage(5V) application
1N4148 0.1uF
1N4148
1N4148 47uF
100uF
2300A 0.1uF
7037
7312
3.3uH 1.5V
Shutdown
7312 1.24k
C7,C10 150uF
2200pF
Copyright ANPEC Electronics Corp. Rev. Apr, 2005
www.anpec.com.tw
APW7037/A/B
Typical Applications (Cont.)
Monitor Application Circuit
2N3904 Circ pplic ation
1N4148
0.1uF
L431
1N4148
0.1uF
470uF
47uF
HDRV
0.1uF
7037
LDRV
7313 7313
50uH 0.2~ C7,C10 470uF
2200pF
Copyright ANPEC Electronics Corp. Rev. Apr, 2005
www.anpec.com.tw
APW7037/A/B
Package Information
SOP-8 Reference JEDEC Registration MS-012)
0.004max.
Min. Min.
0.015X45
Inche
Copyright ANPEC Electronics Corp. Rev. Apr, 2005
www.anpec.com.tw
APW7037/A/B
Package Information
TSSOP-8
GAUGE PLANE
0.25
(L1)
Millimeters Min. 0.00 0.80 0.19 0.65 6.40 4.30 0.45 0.09 0.09 0.004 0.004 0.008 4.50 0.75 0.169 0.018 Max. 0.15 1.05 0.30 Min. 0.000 0.031 0.007 0.114
Inches Max. 0.047 0.006 0.041 0.012 0.122 0.026 0.252 0.177 0.030 0.039REF
Copyright ANPEC Electronics Corp. Rev. Apr, 2005
www.anpec.com.tw
APW7037/A/B
Physical Specifications
Terminal Material Lead Solderability Solder-Plated Copper (Solder Material 90/10 63/37 SnPb), 100%Sn Meets Specification RSI86-91, ANSI/J-STD-002 Category
Reflow Condition
(IR/Convection Reflow)
ritical
p-up
p-down Preheat
Peak
Classificatin Reflow Profiles
Profile Feature Sn-Pb Eutectic Assembly Large Body Small Body Pb-Free Assembly Large Body Small Body 3°C/second max. 150°C 200°C 60-180 seconds 3°C/second 217°C 60-150 seconds +0/-5°C +0/-5°C 10-30 seconds 20-40 seconds
Average ramp-up rate 3°C/second max. Preheat Temperature (Tsmin) 100°C Temperature (Tsmax) 150°C Time (min max)(ts) 60-120 seconds Tsmax Ramp-up Rate Tsmax Temperature(TL) 183°C Time (tL) 60-150 seconds Peak Temperature(Tp) +0/-5°C +0/-5°C Time within actual Peak 10-30 seconds 10-30 seconds Temperature(tp) Ramp-down Rate 6°C/second max. minutes max. Time 25°C Peak Temperature
Copyright ANPEC Electronics Corp. Rev. Apr, 2005
6°C/second max. minutes max.
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Note: temperatures refer topside package. Measured body surface.
APW7037/A/B
Reliability test program
Test item SOLDERABILITY HOLT 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 Description 245°C 1000 Bias Hrs, 121°C -65°C 150°C, Cycles VHBM 2KV, 200V 10ms 100mA
Carrier Tape Reel Dimensions
Application
330±1
SOP-8
12.75 +0.15
12.4 +0.2 12.4
5.2±
2.1±
1.75± 0.3±0.013 1.75±0.1
1.55 ±+0.1 1.55+0.25 Application TSSOP-8 +1.5 12.75+ 0.15
0.3±0.013
(mm)
Copyright ANPEC Electronics Corp. Rev. Apr, 2005 www.anpec.com.tw
APW7037/A/B
Cover Tape Dimensions
Application SOP- TSSOP- Carrier Width Cover Tape Width Devices Reel 2500 2500
Customer Service
Anpec Electronics Corp. Head Office Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. 886-3-5642000 886-3-5642050 Taipei Branch 137, Lane 235, Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, 886-2-89191368 886-2-89191369
Copyright ANPEC Electronics Corp. Rev. Apr, 2005
www.anpec.com.tw
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