Datasheet

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 ≊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
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