ER3105DI Datasheet (Altera) - Synchronous Buck Regulator

ER3105DI, Synchronous Buck Regulator

PIN NUMBER 1 SYMBOL SS 2 SYNC 3 4 5 6 7 8 9 10 11 12 EPAD BOOT PVIN SW PGND EN POK AVINO FB COMP FSW GND PIN DESCRIPTION The SS pin controls the soft-start ramp time of the output.

A single capacitor from the SS pin to ground determines the output ramp rate.

See “Soft Start” on page 16 for so

ER3105DI Features

* a PFM mode for improved efficiency at light loads. This feature can be disabled if forced PWM mode is desired. The part switches at a default frequency of 500kHz but may also be programmed using an external resistor from 300kHz to 2MHz. The ER3105DI has the ability to utilize internal or external co