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APW7120A

Anpec Electronics Coropration
Part Number APW7120A
Manufacturer Anpec Electronics Coropration
Description Synchronous Buck PWM Controller
Published Oct 1, 2010
Detailed Description APW7120A 5V to 12V Supply Voltage, 8-PIN, Synchronous Buck PWM Controller Features General Description • Operating w...
Datasheet PDF File APW7120A PDF File

APW7120A
APW7120A


Overview
APW7120A 5V to 12V Supply Voltage, 8-PIN, Synchronous Buck PWM Controller Features General Description • Operating with Single 5~12V Supply Voltage or Two Supply Voltages • Drive Dual Low Cost N-Channel MOSFETs - Adaptive Shoot-Through Protection • Built-in Feedback Compensation - Voltage-Mode PWM Control - 0~100% Duty Ratio - Fast Transient Response • ±2% 0.
8V Reference - Over Line, Load Regulation, and Operating Temperature • Programmable Over-Current Protection - Using R of Low-Side MOSFET DS(ON) • Hiccup-Mode Under-Voltage Protection • 118% Over-Voltage Protection • Adjustable Output Voltage • Small Converter Size - 300kHz Constant Switching Frequency - Small SOP-8 Package • Built-In Digital Soft-Start • Shutdown Control Using an External MOSFET • Lead Free and Green Devices Available (RoHS Compliant) The APW7120A is a fixed 300kHz frequency, voltage mode, and synchronous PWM controller.
The device drives two low cost N-channel MOSFETs and is designed to work with single 5~12V or two supply voltage(s), providing excellent regulation for load transients.
The APW7120A integrates controls, monitoring and protection functions into a single 8-pin package to provide a low cost and perfect power solution.
A power-on-reset (POR) circuit monitors the VCC supply voltage to prevent wrong logic controls.
An internal 0.
8V reference provides low output voltage down to 0.
8V for further applications.
An built-in digital soft-start with fixed soft-start interval prevents the output voltage from overshoot as well as limiting the input current.
The controller’s over-current protection monitors the output current by using the voltage drop across the low-side MOSFET’s R , eliminating the need of a current sensing resistor.
DS(ON) Additional under voltage and over voltage protections monitor the voltage on FB pin for short-circuit and overvoltage protections.
The over-current protection cycles the soft-start function until 4 over-current events are counted.
Pulling and holding t...


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