AS1344-TD_EK_ST

AS1344-TD_EK_ST Datasheet

AS1344

Part	Datasheet
AS1344-TD_EK_ST	AS1344-TD_EK_ST (pdf)

Related Parts	Information
AS1344-BTDT	AS1344-BTDT

PDF Datasheet Preview
Datasheet AS1344 42V, DC-DC Boost Converter with adjustable Softstart 1 General Description The AS1344 boost converter contains a 1.4A internal switch in a tiny TDFN-10 3x3mm package. The device operates from a 0.9V to 3.6V supply, and can boost voltages up to 42V output. The output voltage can easily be adjusted by an external resistor divider. The AS1344 uses a unique control scheme providing the highest efficiency over a wide range of load conditions. An internal 1.4A MOSFET reduces external component count, and a fixed high switching frequency 1MHz allows for tiny surface-mount components. The AS1344 also features power-OK circuitry which monitors the output voltage. The device also offers a Softstart function which limits the current during startup. The current during startup can be easily adjusted with the value of RV. For RV = 0Ω, there is no softstart. Additionally the AS1344 features a low quiescent supply current and a shutdown mode to save power. During shutdown an output disconnect switch separates the input from the output. The AS1344 is ideal for LCD or OLED panels with low current requirements and can also be used in a wide range of other applications. The device is available in a low-profile TDFN-10 3x3mm package. 2 Key Features ! 5.5V to 42V Adjustable Output Voltage ! 0.9V to 3.6V Supply Voltage Range ! High Output Current: - 30mA 12V VOUT, from 1.5V VCC ! Efficiency Up to 85% ! Switching Frequency 1MHz ! Output Disconnect Function ! Softstart Function with adjustable Current Limit ! Output Discharge Function ! Power-OK Output ! Quiescent Current 22µA ! Shutdown Current 0.1µA ! TDFN-10 3x3mm Package 3 Applications The device is ideal for OLED display power supply, LCD bias generators, mobile/cordless phones, palmtop computers, PDAs and organizers, handy terminals, driving LEDs or any other portable, battery-powered device. Figure AS1344 - Typical Application Diagram VCC = 0.9V to 3.6V RV VCC POK SWOUT AS1344 VOUT D1 FB R2 VOUT = 5.5V to 42V COUT PGND 1 - 19 AS1344 Datasheet - Pinout 4 Pinout Pin Assignments Figure Pin Assignments Top View EN 1 POK 2 GND 3 VCC 4 PGND 5 AS1344 10 FB 9 VOUT 8 VIN 7 SWOUT 6 LX Pin Descriptions Table Pin Descriptions Pin Number Pin Name PGND SWOUT VOUT Description Active-High Enable Input. A logic low on this pin shuts down the device and reduces the supply current to 0.1µA. GND device in shutdown. VCC normal operation. Power-OK. 0 VOUT < 90% of VOUTNOM. 1 VOUT > 90% of VOUTNOM. Ground +0.9V to +3.6V Supply Voltage. Bypass this pin to GND with a capacitor. Datasheet - Ordering Information 11 Ordering Information The device is available as the standard products shown in Table Table Ordering Information Ordering Code AS1344-BTDT Marking ASR7 42V, DC-DC Boost Converter with adjustable Softstart Delivery Form Package Tape and Reel TDFN-10 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 18 - 19 AS1344 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: 19 - 19

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Datasheet

AS1344
42V, DC-DC Boost Converter with adjustable Softstart
1 General Description

The AS1344 boost converter contains a 1.4A internal switch in a tiny TDFN-10 3x3mm package. The device operates from a 0.9V to 3.6V supply, and can boost voltages up to 42V output.

The output voltage can easily be adjusted by an external resistor divider.

The AS1344 uses a unique control scheme providing the highest efficiency over a wide range of load conditions. An internal 1.4A MOSFET reduces external component count, and a fixed high switching frequency 1MHz allows for tiny surface-mount components.

The AS1344 also features power-OK circuitry which monitors the output voltage.

The device also offers a Softstart function which limits the current during startup. The current during startup can be easily adjusted with the value of RV. For RV = 0Ω, there is no softstart.

Additionally the AS1344 features a low quiescent supply current and a shutdown mode to save power. During shutdown an output disconnect switch separates the input from the output.

The AS1344 is ideal for LCD or OLED panels with low current requirements and can also be used in a wide range of other applications.

The device is available in a low-profile TDFN-10 3x3mm package.
2 Key Features
! 5.5V to 42V Adjustable Output Voltage ! 0.9V to 3.6V Supply Voltage Range ! High Output Current:
- 30mA 12V VOUT, from 1.5V VCC ! Efficiency Up to 85% ! Switching Frequency 1MHz ! Output Disconnect Function ! Softstart Function with adjustable Current Limit ! Output Discharge Function ! Power-OK Output ! Quiescent Current 22µA ! Shutdown Current 0.1µA ! TDFN-10 3x3mm Package
3 Applications

The device is ideal for OLED display power supply, LCD bias generators, mobile/cordless phones, palmtop computers, PDAs and organizers, handy terminals, driving LEDs or any other portable, battery-powered device.

Figure AS1344 - Typical Application Diagram

VCC = 0.9V to 3.6V

RV VCC POK

SWOUT

AS1344

VOUT D1

FB R2

VOUT = 5.5V to 42V COUT

PGND
1 - 19

AS1344

Datasheet - Pinout
4 Pinout

Pin Assignments

Figure Pin Assignments Top View

EN 1 POK 2 GND 3 VCC 4 PGND 5

AS1344
10 FB 9 VOUT 8 VIN 7 SWOUT 6 LX

Pin Descriptions

Table Pin Descriptions Pin Number Pin Name

PGND

SWOUT

VOUT

Description Active-High Enable Input. A logic low on this pin shuts down the device and reduces the supply current to 0.1µA. GND device in shutdown. VCC normal operation. Power-OK. 0 VOUT < 90% of VOUTNOM. 1 VOUT > 90% of VOUTNOM. Ground +0.9V to +3.6V Supply Voltage. Bypass this pin to GND with a capacitor.
Datasheet - Ordering Information
11 Ordering Information

The device is available as the standard products shown in Table
Table Ordering Information
Ordering Code AS1344-BTDT

Marking ASR7
42V, DC-DC Boost Converter with adjustable Softstart

Delivery Form

Package

Tape and Reel TDFN-10 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
18 - 19

AS1344

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:
19 - 19

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Datasheet ID: AS1344-TD_EK_ST 519607