AS1329 austriamicrosystems AG, AS1329 Datasheet

AS1329

Manufacturer Part Number

AS1329

Description

DC-DC Step-Up Converters

Manufacturer

austriamicrosystems AG

Datasheet

1.AS1329.pdf (2 pages)

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Meier Automation Equipment Co., Limited

Part Number:

AS1329A-BTTT

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AUSTRIAMICROSYSTEMS可供样品

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Meier Automation Equipment Co., Limited

Part Number:

AS1329B-BTTT

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Company:

Meier Automation Equipment Co., Limited

Part Number:

AS1329C-BTTT

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A S 1 3 2 9

L o w Vo l ta g e , M i c r o p o w e r, D C - D C St e p - U p C o n v e r t e r s

1 General Description

The AS1329A, AS1329B and the AS1329C are synchro-

nous, fixed frequency, very high-efficiency DC-DC boost

converters capable of supplying 3.3V at 160mA from a

single AA-supply. Compact size and minimum external

parts requirements make these devices perfect for mod-

ern portable devices.

High-speed switching frequency (1.2MHz) and internally

compensated PWM current mode design provide highly-

reliable DC-DC conversion, especially when driving

white LEDs.

The converters are available as the standard products

listed in

Table 1. Standard Products

The devices contain two internal MOSFET switches:

one NMOS switch and one PMOS synchronous rectifier.

Anti-ringing control circuitry reduces EMI by damping

the inductor in discontinuous mode, and the devices

exhibit extremely low quiescent current (< 1µA) in shut-

down.

In shutdown mode the battery is connected directly to

the output enabling the supply of real-time-clocks.

The AS1329 is available in a 6-pin TSOT-23 package.

www.austriamicrosystems.com

Figure 1. Typical Application Diagram – Single Cell to 3.3V Synchronous Boost Converter

AS1329A

AS1329B Light Load Automatic Powersave Operation

AS1329C

Model

Table

AA Battery

Automatic Powersave Operation

Light Load Switching

Continuous Switching

Medium Load

Off

10µF

SHDNN

4.7µH

AS1329

Revision 1.01

GND

2 Key Features

3 Applications

The AS1329 is ideal for low-power applications where

ultra-small size is critical as in medical diagnostic equip-

ment, hand-held instruments, pagers, digital cameras,

remote wireless transmitters, MP3 players, LCD bias

supplies, cordless phones, GPS receivers, and PC

cards.

OUT

95% Efficiency

Single-Cell Operation

Delivers 160mA @ 3.3V (from Single AA Cell)

Delivers 220mA @ 5.0V (from Two AA Cells)

Delivers 570mA @ 3.3V (from Two AA Cells)

Low Start-Up Voltage: 0.85V

High-Speed Fixed-Frequency: 1.2MHz

Internal PMOS Synchronous Rectifier

Automatic Powersave Operation (AS1329A&B)

Continuous Switching at Light Loads (AS1329C)

Anti-Ringing Control Minimizes EMI

Logic Controlled Shutdown (< 1µA)

Output Range: 2.5 to 5.0V

6-pin TSOT-23 Package

604kΩ

1.02MΩ

10µF

160mA

3.3V

OUT

P r o d u c t B r i e f

1 - 2

Related parts for AS1329

AS1329 Summary of contents

Page 1

... In shutdown mode the battery is connected directly to the output enabling the supply of real-time-clocks. The AS1329 is available in a 6-pin TSOT-23 package. Figure 1. Typical Application Diagram – Single Cell to 3.3V Synchronous Boost Converter AA Battery On Off www ...

Page 2

... AS1329 Product Brief - Copyrights Copyright © 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, trans- lated, stored, or used without the prior written consent of the copyright owner. ...

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