APW7037 Datasheet, PDF (1/11 Pages) Anpec Electronics Coropration – 8-PIN Synchronous Buck PWM Controller

APW7037/A/B
8-PIN Synchronous Buck PWM Controller
Features
General Description
• Operating with Single 5V or 12V Input
• Drives N-Channel MOSFETs
• Simple Single-Loop Control Design
− Voltage-Mode PWM Control
− Full 0% to 100% Duty Ratio
− Fast Transient Response
• ±2% Output Voltage Accuracy Over Temperature
• Under-Voltage Protection for Output
• 200/400kHz Constant Frequency Operation
-200kHz for APW7037 & APW7037B
-400kHz for APW7037A
• Small size, 8-PIN Package (SOIC or TSSOP)
• Lead Free Available (RoHS Compliant)
The APW7037 series are designed to provide a low
cost synchronous Buck regulator for on-board DC to
DC converter applications. The APW7037 series to-
gether with dual N-channel MOSFETs such as
APM7313, provide a low cost solution for such
applications. Each device features an internal 200/
400kHz oscillator, Power-On-Reset (POR) for both VCC
and VC supplies, an external programmable soft-start
function as well as output under-voltage detection that
latches off the device when an output short is detected.
Pin Description
Applications
• Graphics Cards
• DDR Memory Power Supply
• DDR Memory Termination Voltage
• Low-Voltage Distributed Power Supplies
FB
1
VCC
2
LDRV
3
GND
4
8
SS
7
COMP
6
VC
5
HDRV
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.
1
Rev. A.6 - Apr , 2005
www.anpec.com.tw