LT1111CN8-12#PBF

LT1111CN8-12#PBF is a versatile micropower DC/DC converter. 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. This 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. Applications include 3V to 5V, 5V to 12V converters, 9V to 5V, 12V to 5V converters, remote controls, peripherals and add-on cards, battery backup supplies, uninterruptible supplies, laptop and palmtop computers, cellular telephones, portable instruments, and flash memory VPP generators.

• Operates at supply voltages from 2V to 30V, works with surface mount inductors
• Only three external components required, step-up or step-down mode
• Low-battery detector comparator on-chip, user adjustable current limit
• Quiescent current is 300µA typical at (Switch OFF, TA = 25°C)
• Output hysteresis is 75mV typical
• Oscillator frequency is 72KHz typical at (TA = 25°C)
• Current limit is 400mA typical at (220 ohm from ILIM to VIN, TA = 25°C, VIN = 3V)
• Switch OFF leakage current is 1µA typical at (measured at SW1 pin, VSW1 = 12V)
• Operating temperature range from 0°C to 70°C
• 8-lead plastic DIP package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party