Micropower Inverting DC/DC Converters in SOT-23
LT1617/LT1617-1 Micropower Inverting DC/DC Converters in SOT-23
FEATURES
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DESCRIPTIO
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Low Quiescent Curren...
Description
LT1617/LT1617-1 Micropower Inverting DC/DC Converters in SOT-23
FEATURES
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DESCRIPTIO
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Low Quiescent Current: 20µA in Active Mode <1µA in Shutdown Mode Operates with VIN as Low as 1V Low VCESAT Switch: 250mV at 300mA Uses Small Surface Mount Components High Output Voltage: Up to – 34V Tiny 5-Lead SOT-23 Package
U APPLICATIO S
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LCD Bias Handheld Computers Battery Backup Digital Cameras
The LT®1617/LT1617-1 are micropower inverting DC/DC converters in a 5-lead SOT-23 package. The LT1617 is designed for higher power systems with a 350mA current limit and an input voltage range of 1.2V to 15V, whereas the LT1617-1 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 20µA at no load, which further reduces to 0.5µA in shutdown. A current limited, fixed offtime 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 without the use of costly transformers. The LT1617’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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
1-Cell Li-Ion to –15V Inverting Con...
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