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User's Guide
SNVA379E–November 2008–Revised April 2013
AN-1913 LM5088 Evaluation Board
1 Introduction
The LM5088 evaluation board is designed to provide the design engineer with a fully functional power
converter based on Emulated Current Mode Control to evaluate the LM5088 controller IC. The LM5088
evaluation board is available in two versions (like the LM5088 controller): the LM5088-1 evaluation board
provides ±5% oscillator frequency dithering to reduce EMI and the LM5088-2 evaluation board provides
hiccup mode restart to reduce over load stress. Both the evaluation boards share the same layout except
for silkscreen. The printed circuit board consists of 2 layers, 2 ounce of copper top and bottom and the
board size is 2.55 × 1.5 × 0.5 inches.
Specification LM5088-1 LM5088-2
Input Voltage Range 5.5V to 55V 5.5V to 55V
Output Voltage 5.0V 5.0V
Max. Average Load Current 7A 7A
Load Regulation 2% 2%
Current Limit Type Cycle-by-cycle current limit Hiccup Mode Restart
Frequency 250 kHz (±5% Oscillator Dithering) 250 kHz
Figure 1. Typical Efficiency Curves of LM5088-1 and LM5088-2 Evaluation Boards
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SNVA379E–November 2008–Revised April 2013 AN-1913 LM5088 Evaluation Board
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