Ver: 1.1

Dec 05, 2012

TEL: 886-3-5788833

http://www.gmt.com.tw

1

AT1529

Global Mixed-mode Technology

1MHz, All-Ceramic, 3.2A PWM Buck DC/DC Converter

Features

Ceramic Input and Output Capacitors

Efficiency Up to 94%

Operate from 2.5V to 6V supply

Internal Soft-Start

Short-Circuit and Thermal-Overload Protection

Input Over Voltage Protection

RoHS Compliant

Applications

ASIC/DSP/µP/FPGA Core and I/O Voltages

Set-Top Boxes

Cellular Base Stations

Networking and Telecommunications

General Description

The AT1529 high-efficiency, DC/DC buck converter

delivers up to 3.2A of output current. The device oper-

ates from an input voltage of 2.5V to 6V and provides

ideal for on-board post-regulation applications.

The AT1529 operate at a fixed frequency of 1MHz with

an efficiency of up to 94%. The high operating fre-

quency minimizes the size of external components.

Internal soft-start control circuitry reduces inrush cur-

rent. Short-circuit and thermal-overload protections

improve design reliability.

The AT1529 are available in a space-saving SOP-8

and TDFN3X3-8 package.

Ordering Information

ORDER

NUMBER

MARKING

TEMP.

RANGE

PACKAGE

(Green)

AT1529F11U

A1529

-40°C to +85°C

SOP-8 (FD)

AT1529RD1U

A1529

-40°C to +85°C

TDFN3X3-8

Note: F1:SOP-8 (FD) RD: TDFN3X3-8

1: Bonding Code

U: Tape & Reel

Pin Configuration

Typical Application Circuit

V

OUT

3.3V

Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.

VIN

LX

EN

REF

GND

AT1529

FB

GND

8

6

5

1

2

3

4

VCC

REF

VIN

SOP-8 (FD)

AT1529

7

LX

EN

PGND

VCC

OFF

ON

PGND

5V

FB

V

)

R1

R2

2.2µH

10µF

10

Ω

0.1µF

0.1µF

22µF

C

FB

R1

50k

R2

16k

* (option)

Thermal

Pad

TDFN3X3-8

AT1529

1

2

3

4

8

7

6

5

VCC

GND

Thermal

Pad

REF

FB

VIN

LX

EN

PGND

8

1

5

7

4

2

63

V

OUT

3.3V

Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.

VIN

LX

EN

REF

GND

AT1529

FB

GND

8

6

5

1

2

3

4

VCC

REF

VIN

SOP-8 (FD)

AT1529

7

LX

EN

PGND

VCC

OFF

ON

PGND

5V

FB

V

)

R1

R2

2.2µH

10µF

10

Ω

0.1µF

0.1µF

22µF

C

FB

R1

50k

R2

16k

* (option)

22µF

C

FB

R1

50k

R2

16k

* (option)

Thermal

Pad

TDFN3X3-8

AT1529

1

2

3

4

8

7

6

5

VCC

GND

Thermal

Pad

REF

FB

VIN

LX

EN

PGND

8

1

5

7

4

2

63