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User's Guide
SNVA371D–September 2008–Revised May 2013
AN-1900 LM3150 Evaluation Boards
1 Introduction
The LM3150 evaluation boards are designed to provide the design engineer with a fully functional power
converter based on Constant On-Time with Emulated Ripple mode control to evaluate the LM3150 and
the entire LM315x family of parts. The evaluation board is pre-configured to use the LM3150 with the
output voltage pre-set to 3.3V, with a typical max load current of 10A. There are three different boards that
are configured for 250 kHz, 500 kHz, and 750 kHz respectively. The printed circuit board consists of 4
layers of FR4 material with the top and bottom layers using 2 ounce copper and the inner layers using 1
ounce copper. The board size is 2.9” × 2.9”.
The evaluation board allows for a variety of configurations, and this multifunctional capability is used to
also accept the fixed output versions of the LM3150 such as the LM3151-3.3, LM3152-3.3, and the
LM3153-3.3.
The performance of the synchronous rectifier buck evaluation boards are as follows:
• Switching Frequency: 250 kHz
– Input Range: 6V to 36V
– Output Voltage: 3.3V
– Output Current: 0 to 10A
• Switching Frequency: 500 kHz
– Input Range: 6V to 24V
– Output Voltage: 3.3V
– Output Current: 0 to 10A
• Switching Frequency: 750 kHz
– Input Range: 8V to 17V
– Output Voltage: 3.3V
– Output Current: 0 to 10A
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SNVA371D–September 2008–Revised May 2013 AN-1900 LM3150 Evaluation Boards
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