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LT1302 Datasheet(PDF) 1 Page - Linear Technology |
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LT1302 Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page 1 LT1302/LT1302-5 Micropower High Output Current Step-Up Adjustable and Fixed 5V DC/DC Converters Figure 1. 2-Cell to 5V/600mA DC/DC Converter S FEATURE DESCRIPTIO s 5V at 600mA or 12V at 120mA from 2-Cell Supply s 200 µA Quiescent Current s Logic Controlled Shutdown to 15 µA s Low VCESAT Switch: 310mV at 2A Typical s Burst Mode TM Operation at Light Load s Current Mode Operation for Excellent Line and Load Transient Response s Available in 8-Lead SO or PDIP s Operates with Supply Voltage as Low as 2V The LT ®1302/LT1302-5 are micropower step-up DC/DC converters that maintain high efficiency over a wide range of output current. They operate from a supply voltage as low as 2V and feature automatic shifting between Burst Mode operation at light load, and current mode operation at heavy load. The internal low loss NPN power switch can handle current in excess of 2A and switch at frequencies up to 400kHz. Quiescent current is just 200 µA and can be further reduced to 15 µA in shutdown. Available in 8-pin PDIP or 8-pin SO packaging, the LT1302/ LT1302-5 have the highest switch current rating of any similarly packaged switching regulators presently on the market. S APPLICATI , LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode is a trademark of Linear Technology Corporation. s Notebook and Palmtop Computers s Portable Instruments s Personal Digital Assistants s Cellular Telephones s Flash Memory APPLICATI TYPICAL + NC C3 0.1 µF SHUTDOWN VIN IT VC SW PGND SHDN SENSE GND 2 RC 20k CC 0.01 µF C1 100 µF D1 + C2 100 µF L1 10 µH 2 CELLS LT1302 • F01 C1 = C2 = SANYO OS-CON L1 = COILTRONICS CTX10-3 COILCRAFT DO3316-103 OUTPUT 5V 600mA 1 8 7 65 3 4 D1 = MOTOROLA MBRS130LT3 LT1302-5 LOAD CURRENT (mA) 1 78 80 82 84 86 10 100 1000 LT1302 • TA02 76 74 72 70 88 90 VIN = 3V VIN = 2.5V VIN = 2V 2-Cell to 5V Converter Efficiency |
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