AS1320_1 AMSCO [austriamicrosystems AG], AS1320_1 Datasheet

AS1320_1

Manufacturer Part Number

AS1320_1

Description

200mA Step-Up DC-DC Converter

Manufacturer

AMSCO [austriamicrosystems AG]

Datasheet

1.AS1320_1.pdf (12 pages)

Current page: 1 of 12
Download datasheet (395Kb)

A S 1 3 2 0

2 0 0 m A St e p - U p D C - D C C o n v e r t e r

1 General Description

The AS1320 is a high-efficiency step-up DC-DC con-

verter designed to generate a fixed voltage of +3.3V.

The AS1320 achieves an efficiency of up to 90%. The

minimum input voltage is 1.5V, the output voltage is

fixed at 3.3V, and output current is up to 200mA (@ 2V).

In order to save power the AS1320 features a shutdown

mode, where it draws less than 1µA. In shutdown mode

the battery is connected directly to the output enabling

the supply of real-time-clocks.

The AS1320 provides a power-on reset output that goes

high-impedance when the output reaches 90% of its reg-

ulation point.

The SHDNN trip threshold of the AS1320 can be used

as an input voltage detector that disables the device

when the battery voltage falls to a predetermined level.

An internal synchronous rectifier is included, thus an

external transistor or Schottky diode is not required.

The AS1320 is available in a 6-pin SOT23 package.

Figure 1. Application Diagram

www.austriamicrosystems.com

+1.5 to +3.5V

Battery

22µF

Off

10µH

SHDNN

BATT

Revision 1.03

AS1320

2 Key Features

3 Applications

The AS1320 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, cordless phones, and PC

cards.

The device is also perfect as a local 3.3V supply or as a

battery backup.

Fixed Output Voltage: 3.3V

Output Current: Up to 200mA (@ 2V)

Internal Synchronous Rectifier

Requires No External Schottky Diode or FETs

Shutdown Mode Supply Current: Less Than 1µA

Efficiency: Up to 90%

Minimum Input Voltage: +1.5V

Accurate Shutdown Low-Battery Cutoff Threshold

Battery Input Connected to Pin OUT in Shutdown

6-pin SOT23 Package

Mode for Backup Power

RESETN

GND

OUT

22µF

OUT

100kΩ

Output

+3.3V

RESETN

Output

D a t a S h e e t

1 - 12

Related parts for AS1320_1

AS1320_1 Summary of contents

Page 1

General Description The AS1320 is a high-efficiency step-up ...

Page 2

AS1320 Data Sheet - Pinout Pin Assignments Figure 2. Pin Assignments (Top View) Pin Descriptions Table 1. Pin Descriptions Name Pin Number SHDNN 1 BATT 2 GND OUT 5 RESETN ...

Page 3

AS1320 Data Sheet - Absolute Maximum Ratings Stresses beyond those listed in Table 2 and functional operation ...

Page 4

AS1320 Data Sheet - Electrical Characteristics T = -40 to +85º +2V, ...

Page 5

AS1320 Data Sheet - Typical Operating Characteristics V = ...

Page 6

AS1320 Data Sheet - Figure 9. Line Transient 100µs/Div Figure ...

Page 7

AS1320 Data Sheet - Detailed Description The AS1320 is a high-efficiency, compact step-up converter with 35µA quiescent supply current which ...

Page 8

AS1320 Data Sheet - Low-Battery Cutoff The AS1320 SHDNN trip threshold (1.228V) can be used as an input voltage detector that ...

Page 9

AS1320 Data Sheet - Application Information Inductor Selection The control circuitry of the AS1320 permits a wide ...

Page 10

AS1320 Data Sheet - Package Drawings and Markings The AS1320 is available in ...

Page 11

AS1320 Data Sheet - Ordering Information The AS1320 is available as the standard products shown in Table 4. Ordering Information ...

AS1320 Data Sheet 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 ...

Related keywords

AS1320_1 datasheet
AS1320_1 data sheet
AS1320_1 pdf datasheet
AS1320_1 component
AS1320_1 part
AS1320_1 distributor
AS1320_1 RoHS
AS1320_1 datasheet download