AS1336B-BQFT
AS1336B-BQFT Datasheet
AS1336
| Part | Datasheet |
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AS1336B-BQFT |
AS1336B-BQFT (pdf) |
| Related Parts | Information |
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AS1336A-BQFT |
AS1336A-BQFT |
| PDF Datasheet Preview |
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| Datasheet AS1336 Dual, Low Voltage, Micropower DC-DC Step-Up Converters 1 General Description The AS1336 is a dual synchronous, fixed frequency, very high-efficiency DC-DC boost converter capable of supplying guaranteed 75mA at 3.3V on each output from a 0.8V supply only. Compact size and minimum external parts requirements make this device perfect for modern portable devices. High-speed switching frequency 1.2MHz and internally compensated PWM current mode design provide highlyreliable DC-DC conversion, especially when driving white LEDs. MODE pins allow to enable automatic powersave mode for each regulator independently. The AS1336 can supervise the battery voltage and generate a low battery error flag. A hysteresis ensures valid operation especially during start-up and end of life. The device contains two internal MOSFET switches one NMOS switch and one PMOS synchronous rectifier. Anti-ringing control circuitry reduces EMI by damping the inductor in discontinuous mode, and the device exhibits extremely low current < 2µA in shutdown. The AS1336A offers shutdown disconnect while in the AS1336B the battery is connected directly to the output during shutdown enabling the supply of real-time-clocks. The AS1336 is available in a TQFN 3x3mm 16-pin package. 2 Key Features ! 96% Efficiency ! Operating Voltage from 0.8V to 3.6V ! Output Range 1.8V to 3.6V ! Delivers 145mA 3.3V from 1.5V ! Low Start-Up Voltage 0.8V ! High-Speed Fixed-Frequency 1.2MHz ! Internal PMOS Synchronous Rectifier ! Automatic Powersave Operation ! Anti-Ringing Control Minimizes EMI ! Logic Controlled Shutdown < 2µA ! TQFN 3x3mm 16-pin Package 3 Applications The AS1336 is ideal for low-power applications where ultra-small size is critical as in medical diagnostic equipment, mice, pagers, digital cameras, remote wireless transmitters, MP3 players, LCD bias supplies, cordless phones, GPS receivers, and PC cards. Figure Typical Application Diagram Single Cell to 1.8V & 3.3V Synchronous Boost Converter AA Battery CIN 10µF R1 R2 L1 / L2 LX1 10µH 13 LX2 8 VOUT1 3 FB1 5 AS1336 MODE1 10 LBO 6 MODE2 12 VOUT2 9 2 GND 14 PGND 560kΩ 180kΩ COUT1 10µF VOUT1 3.3V 145mA 150kΩ 120kΩ COUT2 10µF VOUT2 1.8V 260mA 1 - 18 AS1336 Datasheet - Pin Assignments 4 Pin Assignments Figure Pin Assignments Top View Datasheet - Ordering Information 11 Ordering Information The device is available as the standard products listed in Table Table Ordering Information Ordering Code AS1336A-BQFT Marking ASSM Descriptiom Dual, Low Voltage, Micropower DC-DC Step-Up Converters Battery Disconnect in shutdown Delivery Form Tape and Reel Package TQFN 3x3mm 16-pin 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 AS1336 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 |
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