500-kHz wide VIN nonsynchronous boost, flyback, & SEPIC controller

The LM34966-Q1 is a wide input range,

non-synchronous boost controller that uses peak current mode control. The device can

be used in boost, SEPIC, and flyback topologies. The device can start up from a

1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin.

It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is

greater than 3.5 V. The internal VCC regulator also supports BIAS pin operation up

to 40 V (45-V absolute maximum) for automotive load dump. The switching frequency is

dynamically programmable with an external resistor from 100 kHz to 500 kHz.