LTC3122EDE#TRPBF

LTC3122 is a synchronous step-up DC/DC converter with true output disconnect and inrush current limiting. The2.5A current limit along with the ability to program output voltages up to 15V makes the LTC3122 well suited for a variety of demanding applications. Once started, operation will continue with inputs down to 500mV, extending runtime in many applications. It features output disconnect in shutdown, dramatically reducing input power drain and enabling VOUT to completely discharge. Adjustable PWM switching from 100kHz to 3MHz optimizes applications for highest efficiency or smallest solution footprint. The oscillator can also be synchronized to an external clock for noise sensitive applications. Selectable burst mode operation reduces quiescent current to 25µA, ensuring high efficiency across the entire load range. Applications include RF power, piezo actuators, small DC motors, 12V analogue rail from battery, 5V or backup capacitor.

• <lt/>1µA shutdown current, robust protection under short-circuit, thermal overload
• VIN range from 1.8V to 5.5V, 500mV after start-up, output voltage range from 2.2V to 15V
• 800mA output current for VIN = 5V and VOUT = 12V, output disconnects from input when shut down
• Synchronous rectification, up to 95% efficiency, inrush current limit, output overvoltage conditions
• Up to 3MHz adjustable switching frequency, synchronizable to external clock
• Output overvoltage protection, soft-start, <lt/>1µA IQ in shutdown
• Maximum duty cycle of 94% at VFB = 1.0V, VIN = 3.6V, VOUT = 12V, RT = 57.6K
• 12-lead plastic DFN package, -40°C to 125°C temperature range
• An internal soft-start limits inrush current during start-up

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