Texas Instruments Evaluation Board for LM25085 - 42V Wide Vin Constant On-Time PFET Buck Switching Controller LM25085MYE LM25085MYEVAL/NOPB 数据表
产品代码
LM25085MYEVAL/NOPB
User's Guide
SNVA375B – October 2008 – Revised April 2013
AN-1905 LM25085 Evaluation Board
1
Introduction
The LM25085EVAL evaluation board provides the design engineer with a fully functional buck regulator,
employing the LM25085 PFET switching controller that uses the constant on-time (COT) operating
principle. This evaluation board provides a 5 V output over an input range of 5.5 V to 42 V. The circuit
delivers load currents to 5A, with current limit set at
employing the LM25085 PFET switching controller that uses the constant on-time (COT) operating
principle. This evaluation board provides a 5 V output over an input range of 5.5 V to 42 V. The circuit
delivers load currents to 5A, with current limit set at
≊
8.2A. The board is populated with all components
except C5. Its use is described later in this document.
The board’s specification are:
•
Input Voltage: 5.5 V to 42 V
•
Output Voltage: 5 V
•
Maximum load current: 5A for V
IN
>9 V
•
Minimum load current: 0A
•
Current Limit Threshold:
≊
8.2A
•
Measured Efficiency: 97.2% (V
IN
= 5.5 V, I
OUT
= 0.6Amps)
•
Nominal Switching Frequency: 300 kHz
•
Size: 3.1 in. x 1.5 in. x 0.78 in
Figure 1. Evaluation Board - Top Side
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SNVA375B – October 2008 – Revised April 2013
AN-1905 LM25085 Evaluation Board
Copyright © 2008–2013, Texas Instruments Incorporated