LT1107IS8#PBF

LINEAR TECHNOLOGY  LT1107IS8#PBF  直流-直流开关升压, 降压, 反激, 反相稳压器, 可调, 2V-30V输入, 1A输出, 77kHz, SOIC-8

The is a versatile micropower DC-to-DC Converter for use with LCD bias generators. The device requires only three external components to deliver a fixed output of 5 or 12V. Supply voltage ranges from 2 to 12V in step-up mode and to 30V in step-down mode. The LT1107 functions equally well in step-up, step-down or inverting applications. The LT1107 is pin-for-pin compatible with the LT1111, but has a duty cycle of 70%, resulting in increased output current in many applications. The LT1107 can deliver 150mA at 5V from a 2AA cell input and 5V at 300mA from 24V in step-down mode. Quiescent current is just 320µA, making the LT1107 ideal for power-conscious battery-operated systems. The 63kHz oscillator is optimized to work with surface mount inductors and capacitors. Switch current limit can be programmed with a single resistor. An auxiliary gain block can be configured as a low-battery detector, linear post regulator, undervoltage lock-out circuit or error amplifier.

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Works in step-up or step-down mode

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Only three external components required

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Low-battery detector comparator on-chip

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User adjustable current limit

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Fixed or adjustable output voltage versions

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Consumes only 320µA supply current

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Internal 1A power switch