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LT1615ES5-1 Datasheet(PDF) 1 Page - Linear Technology |
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LT1615ES5-1 Datasheet(HTML) 1 Page - Linear Technology |
1 / 8 page 1 LT1615/LT1615-1 sn16151 16151fas Micropower Step-Up DC/DC Converters in ThinSOT The LT ®1615/LT1615-1 are micropower step-up DC/DC converters in a 5-lead low profile (1mm) ThinSOT pack- age. The LT1615 is designed for higher power systems with a 350mA current limit and an input voltage range of 1.2V to 15V, whereas the LT1615-1 is intended for lower power and single-cell applications with a 100mA current limit and an extended input voltage range of 1V to 15V. Otherwise, the two devices are functionally equivalent. Both devices feature a quiescent current of only 20 µAatno load, which further reduces to 0.5 µA in shutdown. A current limited, fixed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of load current. The 36V switch allows high voltage outputs up to 34V to be easily generated in a simple boost topology without the use of costly transformers. The LT1615’s low off-time of 400ns permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications. s Low Quiescent Current: 20 µA in Active Mode <1 µA in Shutdown Mode s Operates with VIN as Low as 1V s Low VCESAT Switch: 250mV at 300mA s Uses Small Surface Mount Components s High Output Voltage: Up to 34V s Low Profile (1mm) ThinSOT TM Package s LCD Bias s Handheld Computers s Battery Backup s Digital Cameras , LTC and LT are registered trademarks of Linear Technology Corporation. 1-Cell Li-Ion to 20V Converter for LCD Bias VIN SW FB LT1615 VIN 2.5V TO 4.2V L1 10 µH D1 SHDN R2 130k R1 2M C2 1 µF 20V 12mA C1: TAIYO YUDEN LMK316BJ475 C2: TAIYO YUDEN TMK316BJ105 D1: MOTOROLA MBR0530 L1: MURATA LQH3C100K24 1615/-1 TA01 GND C1 4.7 µF Efficiency LOAD CURRENT (mA) 0.1 0.3 1 3 10 30 1615/-1 TA01a 85 80 75 70 65 60 55 50 VIN = 4.2V VIN = 2.5V VIN = 3.3V APPLICATIO S FEATURES TYPICAL APPLICATIO DESCRIPTIO ThinSOT is a trademark of Linear Technology Corporation. |
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