ACE722A

Technology

2A PWM BUCK DC-DC Converter

VER 1.2

1

Description

ACE722A is a 420kHz fixed frequency PWM buck (step-down) DC-DC converter, capable of driving a 2A

load with high efficiency, low ripple and excellent line and load regulation. The device includes a voltage

reference, an oscillation circuit, an error amplifier, an internal PMOS and etc.

The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. The enable function, over

current protection function, short circuit protection function and soft-start function are built inside. When

OCP or SCP happens, the operation frequency will be reduced from 420kHz to 40kHz. An internal

compensation block is employed to minimize external components.

The ACE722A serves as an ideal power supply unit for portable devices, especially for chip set power in

portable systems. It’s widely used for PDVD, LCD monitor and DPF chip set powers.

Features

Application

Absolute Maximum Ratings

Parameter

Symbol

Max

Unit

Input Voltage

-0.3 to 30

V

FB Pin Voltage

-0.3 to 6

V

EN Pin Voltage

V

COMP Pin Voltage

-0.3 to 6

V

SW Pin Voltage

V

Power Dissipation

Internally Limited mW

Thermal Resistance (Junction to Ambient, No Heat Sink, Free AIR)

100

Operating Junction Temperature

150

Storage Temperature

-65 to 150

Lead Temperature (Soldering, 10sec)

260

ESD (Human Body Model)

ESD

2000

V