LM5088MH-1EVAL/NOPB National Semiconductor, LM5088MH-1EVAL/NOPB Datasheet

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LM5088MH-1EVAL/NOPB

Manufacturer Part Number
LM5088MH-1EVAL/NOPB
Description
LM5088MH-1 EVAL BOARD
Manufacturer
National Semiconductor
Series
PowerWise®r
Datasheets

Specifications of LM5088MH-1EVAL/NOPB

Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Power - Output
-
Voltage - Output
5V
Current - Output
7A
Voltage - Input
5.5 ~ 55V
Regulator Topology
Buck
Frequency - Switching
250kHz
Board Type
Fully Populated
Utilized Ic / Part
LM5088
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
© 2008 National Semiconductor Corporation
LM5088 Evaluation Board
Introduction
The LM5088 evaluation board is designed to provide the de-
sign 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 evalua-
Max. Average Load Current
Input Voltage Range
Current Limit Type
Load Regulation
Output Voltage
Specification
Frequency
FIGURE 1. Typical Efficiency Curves of LM5088-1 and LM5088-2 Evaluation Boards
300840
250 kHz (±5% Oscillator Dithering)
Cycle-by-cycle current limit
5.5V to 55V
LM5088-1
5.0V
2%
7A
National Semiconductor
Application Note 1913
Ajay Hari
December 9, 2008
tion board provides ±5% oscillator frequency dithering to
reduce EMI and the LM5088-2 evaluation board provides hic-
cup mode restart to reduce over load stress. Both the evalu-
ation 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 2.55x1.5x0.5 inches.
30084001
Hiccup Mode Restart
5.5V to 55V
LM5088-2
250 kHz
5.0V
2%
7A
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LM5088MH-1EVAL/NOPB Summary of contents

Page 1

... Output Voltage Max. Average Load Current Load Regulation Current Limit Type Frequency FIGURE 1. Typical Efficiency Curves of LM5088-1 and LM5088-2 Evaluation Boards © 2008 National Semiconductor Corporation National Semiconductor Application Note 1913 Ajay Hari December 9, 2008 tion board provides ±5% oscillator frequency dithering to reduce EMI and the LM5088-2 evaluation board provides hic- cup mode restart to reduce over load stress ...

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Powering and Loading Considerations Read this entire page prior to attempting to power the evalu- ation board. QUICK SETUP PROCEDURE Step 1: Set the power supply current limit to 10A. Turn off the power supply. Connect the power supply to ...

Page 3

Typical Performance Waveforms of LM5088-1 and LM5088-2 Evaluation Boards Conditions: Input Voltage = 48VDC Output Current = Bandwidth Limit = 20 MHz Traces: Bottom Trace: Output Current Amps/div = 2A Top Trace: Output Voltage response Volts/div = ...

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www.national.com 4 ...

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5 www.national.com ...

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Bill of Materials for LM5088-1 and LM5088-2 Evaluation Boards Part Value Package C1,C2,C3, 2.2 µF C1210 C4,C5 C6,C19 0.1 µF C0805 C7 1 µF C0603 C8,C11 100 pF C0603 C9 270 pF C0603 C13 0.1 µF C0603 C10 0.022 µF ...

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PCB Layout LM5088-1 and LM5088-2 Top Layer LM5088-1 and LM5088-2 Bottom Layer 7 30084009 30084010 www.national.com ...

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LM5088-2 Silk Screen LM5088-1 Silk Screen 8 30084011 30084012 ...

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Notes 9 www.national.com ...

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