LM25085A Datasheet (National Semiconductor) - 42V Constant On-Time PFET Buck Switching Controller

LM25085A, 42V Constant On-Time PFET Buck Switching Controller

The LM25085A is a functional variant of the LM25085 COT PFET Buck Switching Controller.

The functional differences of the LM25085A are: The feedback reference voltage is 0.9V, the forced off-time after current limit detection is longer, and the soft-start time is shorter (1.8 ms).

The LM25085A is a

LM25085A Features

* Wide 4.5V to 42V input voltage range

* Adjustable current limit using RDS(ON) or a current sense

* resistor Programmable switching frequency to 1MHz No loop compensation required Ultra-Fast transient response Nearly constant operati