The LT1111 is a versatile micropower DC/DC converter. The device requires only three external components to deliver a fixed output of 5V or 12V. Supply voltage ranges from 2V to 12V in step-up mode and to 30V in step-down mode. The LT1111 functions equally well in step-up, step-down, or inverting applications. The LT1111 oscillator is set at 72kHz, optimizing the device to work with off-the-shelf surface mount inductors. The device can deliver 5V at 100mA from a 3V input in step-up mode or 5V at 200mA from a 12V input in step-down mode. Switch current limit can be programmed with a single resistor. An auxiliary open-collector gain block can be configured as a low-battery detector, linear post regulator, undervoltage lock-out circuit, or error amplifier. For input sources of less than 2V use the LT1110.
- Operates at supply voltages from 2V to 30V
- Works with surface mount inductors
- 72kHz oscillator
- Only three external components required
- Step-up or step-down mode
- Low-battery detector comparator on-chip
- User adjustable current limit
- Internal 1A power switch
- Fixed or adjustable output voltage versions
- Space saving 8-Pin minidip or SO-8 package
- Operating temp.: 0 to 70°C
- For full details please refer to data sheet
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