AS1325-BSTT-33

AS1325-BSTT-33 Datasheet

AS1325

Part	Datasheet
AS1325-BSTT-33	AS1325-BSTT-33 (pdf)

Related Parts	Information
AS1325-BSTT-50	AS1325-BSTT-50

PDF Datasheet Preview
AS1325 300mA Step-Up DC-DC Converter Data Sheet 1 General Description The AS1325 is a high-efficiency step-up DC-DC converter designed to generate a fixed output voltage of +3.3V or +5V. The AS1325 achieves an efficiency of up to 96% and the minimum input voltage is 1.5V. The AS1325-BSTT-33 delivers up to 300mA output current at the fixed output voltage of +3.3V 2V VBATT . With the fixed output voltage of +5V the AS1325-BSST-50 supplies up to 185mA output current 2V VBATT . In order to save power the AS1325 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 AS1325 provides a power-on reset output that goes high-impedance when the output reaches 90% of its regulation point. The SHDNN trip threshold of the AS1325 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. The AS1325 is available in a 6-pin SOT23 package. Figure Application Diagram 2 Key Features ! Fixed Output Voltage - 3.3V AS1325-BSTT-33 or 5V AS1325-BSST-50 ! Output Current - Up to 300mA AS1325-BSTT-33 2V VBATT - Up to 185mA AS1325-BSST-50 2V VBATT ! Internal Synchronous Rectifier ! Shutdown Mode Supply Current Less Than 1µA ! Efficiency Up to 96% ! Minimum Input Voltage +1.5V ! Accurate Shutdown Low-Battery Cutoff Threshold ! Battery Input Connected to Pin OUT in Shutdown Mode for Backup Power ! Antiringing Control Minimizes EMI ! Ripple Reduction at Light Loads ! 6-pin SOT23 Package 3 Applications The AS1325 is ideal for low-power applications where ultra-small size is critical as in medical diagnostic equipment, hand-held instruments, pagers, digital cameras, remote wireless transmitters, cordless phones, and PC cards. The device is also perfect as a local supply or as a battery backup. 2 BATT to +3.3V or to +5.0V Battery CIN 22µF 10µH SHDNN +5.0V Output only 5 OUT COUT 22µF AS1325 6 RESETN or +5.0V Output R1 100kΩ RESETN Output 3 GND 1 - 17 AS1325 Data Sheet - Pinout 4 Pinout Pin Assignments Figure Pin Assignments Top View SHDNN 1 6 RESETN BATT 2 AS1325 5 OUT GND 3 Pin Descriptions Table Pin Descriptions Name Pin Number Data Sheet - Ordering Information 11 Ordering Information The AS1325 is available as the standard products shown in Table Table Ordering Information Part AS1325-BSTT-33 AS1325-BSTT-50 Marking ASKY ASK6 Description 300mA Step-Up DC-DC Converter 185mA Step-Up DC-DC Converter Delivery Form Tape and Reel Tape and Reel Package 6-pin SOT23 6-pin SOT23 16 - 17 AS1325 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, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG A-8141 Schloss Premstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 17 - 17

PDF Datasheet Preview

AS1325
300mA Step-Up DC-DC Converter

Data Sheet
1 General Description

The AS1325 is a high-efficiency step-up DC-DC converter designed to generate a fixed output voltage of +3.3V or +5V. The AS1325 achieves an efficiency of up to 96% and the minimum input voltage is 1.5V. The AS1325-BSTT-33 delivers up to 300mA output current at the fixed output voltage of +3.3V 2V VBATT . With the fixed output voltage of +5V the AS1325-BSST-50 supplies up to 185mA output current 2V VBATT . In order to save power the AS1325 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 AS1325 provides a power-on reset output that goes high-impedance when the output reaches 90% of its regulation point. The SHDNN trip threshold of the AS1325 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. The AS1325 is available in a 6-pin SOT23 package.

Figure Application Diagram
2 Key Features
! Fixed Output Voltage - 3.3V AS1325-BSTT-33 or 5V AS1325-BSST-50
! Output Current - Up to 300mA AS1325-BSTT-33 2V VBATT - Up to 185mA AS1325-BSST-50 2V VBATT
! Internal Synchronous Rectifier ! Shutdown Mode Supply Current Less Than 1µA ! Efficiency Up to 96% ! Minimum Input Voltage +1.5V ! Accurate Shutdown Low-Battery Cutoff Threshold ! Battery Input Connected to Pin OUT in Shutdown

Mode for Backup Power ! Antiringing Control Minimizes EMI ! Ripple Reduction at Light Loads ! 6-pin SOT23 Package
3 Applications

The AS1325 is ideal for low-power applications where ultra-small size is critical as in medical diagnostic equipment, hand-held instruments, pagers, digital cameras, remote wireless transmitters, cordless phones, and PC cards. The device is also perfect as a local supply or as a battery backup.
2 BATT
to +3.3V or to +5.0V Battery

CIN 22µF
10µH

SHDNN
+5.0V Output only
5 OUT

COUT 22µF

AS1325
6 RESETN
or +5.0V Output

R1 100kΩ

RESETN Output
3 GND
1 - 17

AS1325

Data Sheet - Pinout
4 Pinout

Pin Assignments

Figure Pin Assignments Top View

SHDNN 1
6 RESETN

BATT 2 AS1325 5 OUT

GND 3

Pin Descriptions

Table Pin Descriptions

Name

Pin Number
Data Sheet - Ordering Information
11 Ordering Information

The AS1325 is available as the standard products shown in Table
Table Ordering Information

Part AS1325-BSTT-33 AS1325-BSTT-50

Marking ASKY ASK6

Description 300mA Step-Up DC-DC Converter 185mA Step-Up DC-DC Converter

Delivery Form Tape and Reel Tape and Reel

Package 6-pin SOT23 6-pin SOT23
16 - 17

AS1325

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, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Disclaimer

Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.

Contact Information

Headquarters austriamicrosystems AG A-8141 Schloss Premstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
17 - 17

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AS1325-BSTT-33 Datasheet file may be downloaded here without warranties.

Datasheet ID: AS1325-BSTT-33 519590