LM25088MH-1EVAL National Semiconductor, LM25088MH-1EVAL Datasheet

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LM25088MH-1EVAL

Manufacturer Part Number
LM25088MH-1EVAL
Description
BOARD EVAL FOR LM25088MH-1
Manufacturer
National Semiconductor
Series
PowerWise®r

Specifications of LM25088MH-1EVAL

Design Resources
LM(2)5088-1/2 QS Component Calculator
Main Purpose
DC/DC, Step Down
Outputs And Type
1, Non-Isolated
Voltage - Output
5V
Current - Output
7A
Voltage - Input
5.5 ~ 36V
Regulator Topology
Buck
Frequency - Switching
250kHz
Board Type
Fully Populated
Utilized Ic / Part
LM25088
Silicon Manufacturer
National
Silicon Core Number
LM25088
Kit Application Type
Power Management - Voltage Regulator
Application Sub Type
Buck Controller
Kit Contents
Board
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-
Lead Free Status / Rohs Status
Supplier Unconfirmed
© 2008 National Semiconductor Corporation
LM25088 Evaluation Board
Introduction
The LM25088 evaluation board is designed to provide the
design engineer with a fully functional power converter based
on Emulated Current Mode Control to evaluate the LM25088
controller IC. The LM25088 evaluation board is available in
two versions (like the LM25088 controller): the LM25088-1
Max. Average Load Current
Input Voltage Range
Current Limit Type
Load Regulation
Output Voltage
Specification
Frequency
FIGURE 1. Typical Efficiency Curves of LM25088-1 and LM25088-2 Evaluation Boards
300877
250 kHz (±5% Oscillator Dithering)
Cycle-by-cycle current limit
5.5V to 36V
LM25088-1
5.0V
2%
7A
National Semiconductor
Application Note 1931
Ajay Hari
December 8, 2008
evaluation board provides ±5% oscillator frequency dithering
to reduce EMI and the LM25088-2 evaluation board provides
hiccup mode restart to reduce over load stress. Both the eval-
uation boards share the same layout except for silkscreen.
The printed circuit board consists of 2 layers, 2 ounce of cop-
per top and bottom and the board size is 2.55x1.5x0.5 inches.
30087701
Hiccup Mode Restart
5.5V to 36V
LM25088-2
250 kHz
5.0V
2%
7A
www.national.com

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LM25088MH-1EVAL Summary of contents

Page 1

... Output Voltage Max. Average Load Current Load Regulation Current Limit Type Frequency FIGURE 1. Typical Efficiency Curves of LM25088-1 and LM25088-2 Evaluation Boards © 2008 National Semiconductor Corporation National Semiconductor Application Note 1931 Ajay Hari December 8, 2008 evaluation board provides ±5% oscillator frequency dithering to reduce EMI and the LM25088-2 evaluation board provides hiccup mode restart to reduce over load stress ...

Page 2

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 LM25088-1 and LM25088-2 Evaluation Boards Conditions: Input Voltage = 24VDC 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 LM25088-1 and LM25088-2 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 ...

Page 7

PCB Layout LM25088-1 and LM25088-2 Top Layer LM25088-1 and LM25088-2 Bottom Layer 7 30087709 30087710 www.national.com ...

Page 8

LM25088-2 Silk Screen LM25088-1 Silk Screen 8 30087711 30087712 ...

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Notes 9 www.national.com ...

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