The LT3757EDD#PBF is a current-mode DC/DC Controller which is capable of generating either positive or negative output voltages. It can be configured as either a boost, flyback, SEPIC or inverting converter. It drives a low side external N-channel power MOSFET from an internal regulated 7.2V supply. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. The operating frequency of the controller can be set with an external resistor over a 100kHz to 1MHz range and can be synchronized to an external clock using the SYNC pin. A low minimum operating supply voltage of 2.9V and a low shutdown quiescent current of less than 1μA, makes the controller ideal. It features soft-start and frequency fold back functions to limit inductor current during start-up and output short-circuit.
Positive or negative output voltage programming with a single feedback pin
Current mode control provides excellent transient response
Synchronizable to an external clock
<1μA Low shutdown current
Internal 7.2V Low dropout voltage regulator
Programmable input undervoltage lockout with hysteresis
(EN)
