AS1335-BTDT-100

AS1335-BTDT-100 Datasheet

AS1335

Part	Datasheet
AS1335-BTDT-100	AS1335-BTDT-100 (pdf)

Related Parts	Information
AS1335-BTDT-AD	AS1335-BTDT-AD

PDF Datasheet Preview
Datasheet AS1335 1.5A, 1.5MHz, Synchronous DC/DC Step-Down Converter 1 General Description The AS1335 is a high-efficiency, constant-frequency synchronous buck converter available in a fixed or an adjustable output voltage version. The wide input voltage range 2.6V to 5.25V , the high output current up to 1.5A and minimal external component requirements make the AS1335 perfect for any single Li-Ion batterypowered application. Typical supply current with no load is 400µA and decreases to in shutdown mode. The highly efficient duty cycle 100% provides low dropout operation, prolonging battery life in portable systems. The device also offers a power-ok signal with a 215ms delay, which can be reseted or delayed further via the RSI pin. An internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. The internally fixed switching frequency 1.5MHz allows for the use of small surface mount external components. The AS1335 is available in a 10-pin TDFN 3x3mm package. 2 Key Features ! High Efficiency Up to 96% ! Output Current 1.5A ! Input Voltage Range 2.6V to 5.25V ! Output Voltage Range 0.6V to VIN ! Constant Frequency Operation 1.5MHz ! No Schottky Diode Required ! Power OK with 215ms delay ! Low Dropout Operation 100% Duty Cycle ! Low Quiescent Supply Current 400µA ! Shutdown Mode Supply Current ! Current Mode Operation for Excellent Line/Load Transient Response ! Thermal Protection ! 10-pin TDFN 3x3mm Package Figure AS1335 - Typical Application Diagram 3 Applications The device is ideal for mobile communication devices, laptops and PDAs, ultra-low-power systems, threshold detectors/discriminators, telemetry and remote systems, medical instruments, or any other space-limited application with low power-consumption requirements. 2.6V to 5.25V CIN 22µF VIN NC EN POK GND AS1335 2.2µH SW PGND GND FB RSI COUT 22µF VOUT 1.0V, 1.5A 1 - 18 AS1335 Datasheet - Pinout 4 Pinout Pin Assignments Figure Pin Assignments Top View VIN 1 NC 2 EN 3 POK 4 GND 5 10 SW AS1335 9 PGND 8 GND 11 6 RSI Pin Descriptions Table Pin Descriptions Pin Number Pin Name Positive Supply Voltage. This pin must be closely decoupled to PGND with a 22µF ceramic capacitor. NC Not Connected. Enable Input. Driving this pin above 1.4V enables the device. Driving this pin below 0.3V Datasheet - Ordering Information 11 Ordering Information The device is available as the following standard versions. Table Ordering Information Ordering Code Marking Delivery Form AS1335-BTDT-100 ASSI 1.5A, 1.5MHz, Synchronous DC/DC Step-Down Converter, fixed VOUT = 1.0V Tape and Reel AS1335-BTDT-AD ASSC 1.5A, 1.5MHz, Synchronous DC/DC Step-Down Converter, user-adjustable Output Voltage Tape and Reel Package 10-pin TDFN 3x3mm 10-pin TDFN 3x3mm Note All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: For further information and requests, please contact us or find your local distributor at 17 - 18 AS1335 Datasheet Copyrights Copyright 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 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 life-sustaining 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 Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: 18 - 18

PDF Datasheet Preview

Datasheet

AS1335
1.5A, 1.5MHz, Synchronous DC/DC Step-Down Converter
1 General Description

The AS1335 is a high-efficiency, constant-frequency synchronous buck converter available in a fixed or an adjustable output voltage version. The wide input voltage range 2.6V to 5.25V , the high output current up to 1.5A and minimal external component requirements make the AS1335 perfect for any single Li-Ion batterypowered application.

Typical supply current with no load is 400µA and decreases to in shutdown mode. The highly efficient duty cycle 100% provides low dropout operation, prolonging battery life in portable systems.

The device also offers a power-ok signal with a 215ms delay, which can be reseted or delayed further via the RSI pin.

An internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. The internally fixed switching frequency 1.5MHz allows for the use of small surface mount external components.

The AS1335 is available in a 10-pin TDFN 3x3mm package.
2 Key Features
! High Efficiency Up to 96% ! Output Current 1.5A ! Input Voltage Range 2.6V to 5.25V ! Output Voltage Range 0.6V to VIN ! Constant Frequency Operation 1.5MHz ! No Schottky Diode Required ! Power OK with 215ms delay ! Low Dropout Operation 100% Duty Cycle ! Low Quiescent Supply Current 400µA ! Shutdown Mode Supply Current ! Current Mode Operation for Excellent Line/Load

Transient Response ! Thermal Protection ! 10-pin TDFN 3x3mm Package

Figure AS1335 - Typical Application Diagram
3 Applications

The device is ideal for mobile communication devices, laptops and PDAs, ultra-low-power systems, threshold detectors/discriminators, telemetry and remote systems, medical instruments, or any other space-limited application with low power-consumption requirements.
2.6V to 5.25V

CIN 22µF

VIN NC EN POK GND

AS1335
2.2µH SW PGND GND FB RSI

COUT 22µF

VOUT
1.0V, 1.5A
1 - 18

AS1335

Datasheet - Pinout
4 Pinout

Pin Assignments

Figure Pin Assignments Top View

VIN 1 NC 2 EN 3 POK 4 GND 5
10 SW

AS1335
9 PGND 8 GND
11 6 RSI

Pin Descriptions

Table Pin Descriptions

Pin Number

Pin Name

Positive Supply Voltage. This pin must be closely decoupled to PGND with a 22µF ceramic capacitor.

NC Not Connected.

Enable Input. Driving this pin above 1.4V enables the device. Driving this pin below 0.3V
Datasheet - Ordering Information
11 Ordering Information

The device is available as the following standard versions.
Table Ordering Information
Ordering Code Marking

Delivery Form

AS1335-BTDT-100

ASSI
1.5A, 1.5MHz, Synchronous DC/DC Step-Down Converter, fixed VOUT = 1.0V

Tape and Reel

AS1335-BTDT-AD

ASSC
1.5A, 1.5MHz, Synchronous DC/DC Step-Down Converter, user-adjustable Output Voltage

Tape and Reel

Package
10-pin TDFN 3x3mm
10-pin TDFN 3x3mm

Note All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect:

For further information and requests, please contact us or find your local distributor at
17 - 18

AS1335

Datasheet

Copyrights

Copyright 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 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 life-sustaining 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 Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:
18 - 18

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 AS1335-BTDT-100 Datasheet file may be downloaded here without warranties.

Datasheet ID: AS1335-BTDT-100 519597