ACE721A datasheet(1/8 Pages) ACE

Part #	ACE721A

Description	1.2MHz, 800mA SYNCHRONOUS DC-DC BUCK CONVERTER

PDF	8 Pages

Scroll/Zoom	100%

Manufacturer	ACE [ACE Technology Co., LTD.]

Direct Link	http://www.ace-ele.com

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ACE721A

Technology

1.2MHz, 800mA SYNCHRONOUS DC-DC BUCK CONVERTER

VER 1.3

1

Description

The ACE721A is a 1.2MHz fixed frequency, current mode, PWM synchronous buck (step-down) DC-DC

converter, capable of driving a 800mA load with high efficiency, excellent line and load regulation. The

device integrates a main switch and a synchronous switch without an external Schottky diode. It is ideal

for powering portable equipment that runs from a single Li-ion battery.

A standard series of inductors are available from several different manufactures optimized for use with

the ACE721A. This feature greatly simplifies the design of switch-mode power supplies.

This IC is available in SOT-23-5 packages.

Features

• High Efficiency: up to 95%

• Output Current: 800mA

• Input Voltage Range: 2.5V to 5.5V

• Fixed 1.2MHz Frequency

• Current Mode Control

• 100% Duty Cycle in Dropout

• Built-in Short Circuit Protection

• Built-in Thermal Shutdown Function

• Built-in Current Limit Function

• Shutdown Current: <1μA

Application

• GPS

• WiFi Card

• Portable Media Player

• Digital Still and Video Cameras

Absolute Maximum Ratings

Parameter

Symbol

Value

Unit

Input Voltage

VIN

-0.3 to 6

V

Feedback Voltage

VFB

-0.3 to VIN+0.3

V

EN Pin Voltage

VEN

-0.3 to VIN+0.3

V

SW Pin Voltage

VSW

-0.3 to VIN+0.3

V

Thermal Resistance

θJA

SOT-23-5

250

℃

/W

Operating Junction Temperature

TJ

125

℃

Storage Temperature

TSTG

-65 to 150

℃

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ACE721A Datasheet(PDF) 1 Page - ACE Technology Co., LTD.

ACE721A Datasheet(HTML) 1 Page - ACE Technology Co., LTD.

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