View AS1340_4218695.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

AS1340
5 0 V, M i c r o p o w e r, D C - D C B o o s t C o n v e r t e r
Product Brief
1 General Description
The AS1340 boost converter contains a 1.4A internal switch in a tiny TDFN-8 3x3mm package. The device operates from a 2.7 to 5.5V supply, and can boost voltages up to 50V output. The output voltage can easily be adjusted by an external resistor divider. The AS1340 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 AS1340 also features power-OK circuitry which monitors the output voltage. Additionally the AS1340 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 AS1340 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-8 3x3mm package.
2 Key Features
! ! ! !
2.7V to 50V Adjustable Output Voltage 2.7V to 50V Input Voltage Range 2.7V to 5.5V Supply Voltage Range High Output Currents: - 100mA @ 12V from 3.3V VIN - 50mA @ 24V from 3.3V VIN - 30mA @ 36V from 3.3V VIN Efficiency: Up to 90% Switching Frequency: 1MHz Output Disconnect Power-OK Output Operating Supply Current: 30A Shutdown Current: 0.1A TDFN-8 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 or any other portable, battery-powered device.
Figure 1. Typical Application Diagram
L1 4.7H VIN = 2.7V to 5.5V VOUT = >VIN to 50V 5 LX R1 8 FB R2 On Off 1 SHDNN 7, 9 GND VIN = 2.7V to 5.5V VCC COUT VCC 3 L1 6 LX
3 VIN = 2.7V to 5.5V CIN SWVIN 2 VCC 4 POK
6 SWOUT
VOUT
AS1340
VIN = 2.7V to ~VOUT 3
L1 6 LX
VOUT
If not needed the output disconnect switch can be left unconnected which will also increase the efficiency. Additionally the supply of the chip can be split to allow higher supply voltages for the coil. In this case the output disconnect switch must not be used.
www.austriamicrosystems.com
Revision 1.01
1-2
AS1340
Product Brief
Copyrights
Copyright (c) 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered (R). 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 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: http://www.austriamicrosystems.com/contact
www.austriamicrosystems.com
Revision 1.01
2-2

▲Up To Search▲

Price & Availability of AS1340

	To Download AS1340 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .