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LT1316CMS8 Datasheet(PDF) 1 Page - Linear Technology |
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LT1316CMS8 Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page 1 LT1316 Micropower DC/DC Converter with Programmable Peak Current Limit s Precise Control of Peak Switch Current s Quiescent Current: 33 µA in Active Mode 3 µA in Shutdown Mode s Low-Battery Detector Active in Shutdown s Low Switch VCESAT: 300mV at 500mA s 8-Lead MSOP and SO Packages s Operates with VIN as Low as 1.5V s Logic Level Shutdown Pin FEATURES DESCRIPTION The LT ®1316 is a micropower step-up DC/DC converter that operates from an input voltage as low as 1.5V. A programmable input current limiting function allows pre- cise control of peak switch current. Peak switch current can be set to any value between 30mA and 500mA by adjusting one resistor. This is particularly useful for DC/DC converters operating from high source impedance inputs such as lithium coin cells or telephone lines. The fixed off-time, variable on-time regulation scheme results in quiescent current of only 33 µA in active mode. Quiescent current decreases to 3 µA in shutdown with the low-battery detector still active. The LT1316 is available in 8-lead MSOP and SO packages. , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION APPLICATIONS s Battery Backup s LCD Bias s Low Power – 48V to 5V/3.3V Converters 2-Cell to 5V Step-Up Converter VIN SW RSET GND FB SHDN 65 8 1 4 3 2 7 LBO LBI LT1316 C2 47 µF NC NC R5 10k 1% C1 47 µF 2 CELLS L1 47 µH D1 5V 50mA D1: MOTOROLA MBR0520L L1: SUMIDA CD43-470 1316 TA01 + + R1 1M 1% R2 324k 1% LOAD CURRENT (mA) 0.1 60 80 90 1 10 100 1316 TA02 70 3.3VIN 2.5VIN 1.8VIN Efficiency vs Load Current |
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