User's Guide
SNVA384B – February 2009 – Revised April 2013
AN-1933 LM25085A Evaluation Board
1
Introduction
The LM25085AEVAL evaluation board provides the design engineer with a fully functional buck regulator,
employing the LM25085A PFET switching controller which uses the constant on-time (COT) operating
principle. This evaluation board provides a 1V output over an input range of 4.5V to 24V. The circuit
delivers load currents to 5A, with current limit set at
≊
8.2A. The board is populated with all components
except C5 and C7.
The board’s specification are:
•
Input Voltage: 4.5V to 24V
•
Output Voltage: 1V
•
Maximum load current: 5A
•
Minimum load current: 0A
•
Current Limit Threshold:
≊
8.2A
•
Measured Efficiency: 77.5% (V
IN
= 4.5V, I
OUT
= 1Amp, typical efficiency for converter providing a 1V
output)
•
Nominal Switching Frequency: 200 kHz
•
Size: 3.1 in. x 1.5 in.
Figure 1. Evaluation Board - Top Side
All trademarks are the property of their respective owners.
1
SNVA384B – February 2009 – Revised April 2013
AN-1933 LM25085A Evaluation Board
Submit Documentation Feedback
Copyright © 2009–2013, Texas Instruments Incorporated
