LT1302 Datasheet | Linear Technology

LT1302/LT1302-5 Micropower High Output Current Step-Up Adjustable and Fixed 5V DC/DC Converters Features s s s s s s DESCRIPTIO s s 5V at 600m A or 12V at 120m A from 2-Cell Supply 200µA Quiescent Current Logic Controlled Shutdown to 15µA Low VCESAT Switch: 310m V at 2A Typical Burst Mode TM Operation at Light Load Current Mode Operation for Excellent Line and Load Transient Response Available in 8-Lead SO or PDIP 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 400k Hz. Quiescent current is just 200µA and can be further reduced to 15µA 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. , LTC and LT are registered trademarks of Linear Technology Corporation. APPLICATI s s s s s Notebook and Palmtop puters Portable Instruments Personal Digital Assistants Cellular Telephones Flash Memory Burst Mode is a trademark of Linear Technology Corporation. TYPICAL APPLICATI L1 10µH 6 7 VIN SW PGND GND 1 NC 5 IT SHDN 3 4 SHUTDOWN 2-Cell to 5V Converter Efficiency 90 88 86 EFFICIENCY (%) 2 CELLS + C1 C3 0.1µF D1 LT1302-5 8 SENSE VC 100µF 84 82 80 78 76 74 + C2 100µF 2 RC 20k CC 0.01µF OUTPUT 5V 600m A C1 = C2 = SANYO OS-CON L1 = COILTRONICS CTX10-3 COILCRAFT DO3316-103 - F01 70 1 10 100 LOAD CURRENT (m A) 1000 - TA02 D1 = MOTOROLA...