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APW7063

Anpec Electronics Coropration
Part Number APW7063
Manufacturer Anpec Electronics Coropration
Description Synchronous Buck PWM and Linear Controller
Published Nov 17, 2008
Detailed Description APW7063 Synchronous Buck PWM and Linear Controller Features • Provide Two Regulated Voltages - Synchronous Rectified B...
Datasheet PDF File APW7063 PDF File

APW7063
APW7063

Overview
APW7063 Synchronous Buck PWM and Linear Controller Features • Provide Two Regulated Voltages - Synchronous Rectified Buck PWM Controller - Linear Controller • Fast Transient Response - 0~85% Duty Ratio • Excellent Output Voltage Regulation - 0.
8V Internal Reference - ±1% Over Line Voltage and Temperature • Over Current Protection - Sense Low-Side MOSFET’s RDS(ON) • Under Voltage Lockout • Small Converter Size - 250kHz Free-Running Oscillator - Programmable From 70kHz to 800kHz • 14-Lead SOIC Package • Lead Free and Green Devices Available (RoHS Compliant) Applications • Graphic Cards • Memory Power Supplies • DSL or Cable MODEMs • Set Top Boxes • Low-Voltage Distributed Power Supplies General Description The APW7063 integrates PWM and linear controller, as well as the monitoring and protection functions into a single package.
The synchronous PWM controller which drives dual N-channel MOSFETs, which provides one controlled power outputs with under-voltage and overcurrent protections.
Linear controller drives an external N-channel MOSFET with under-voltage protection.
APW7063 provides excellent regulation for output load variation.
An internal 0.
8V temperature-compensated reference voltage is designed to meet the various low output voltage applications.
APW7063 includes a 250kHz free-running triangle-wave oscillator that is adjustable from 70kHz to 800kHz.
A power-on-reset (POR) circuit limits the VCC minimum opearting supply voltage to assure the controller working well.
Over current protection is achieved by monitoring the voltage drop across the low side MOSFET, eliminating the need for a current sensing resistor and short circuit condition is detected through the FB pin.
The overcurrent protection triggers the soft-start function until the fault events be removed, but Under-voltage protection will shutdown IC directly.
Pull the COMP pin below 0.
4V will shutdown the controller, and both gate drive signals will be low.
Pin Configuration RT SS VREG FB COMP GND PH...


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