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LM25085A

National Semiconductor
Part Number LM25085A
Manufacturer National Semiconductor
Description 42V Constant On-Time PFET Buck Switching Controller
Published Sep 11, 2009
Detailed Description LM25085A 42V Constant On-Time PFET Buck Switching Controller www.DataSheet4U.com March 16, 2009 LM25085A 42V Constan...
Datasheet PDF File LM25085A PDF File

LM25085A
LM25085A

Overview
LM25085A 42V Constant On-Time PFET Buck Switching Controller www.
DataSheet4U.
com March 16, 2009 LM25085A 42V Constant On-Time PFET Buck Switching Controller with 0.
9V Reference General Description 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 high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications.
This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.
5V to 42V input range.
The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultra-fast load transient response.
The operating frequency remain...


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