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Microsemi LX1918, User Manual

The Microsemi LX1918 user manual is readily available for download, free of charge, from our website. This comprehensive manual provides detailed instructions and information on operating and maximizing the potential of your LX1918 device. Unlock its full potential with our easy-to-access manual at 88.208.23.73:8080.

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LX1918 E

VALUATION

B

OARD

U

SER

G

UIDE

Microsemi

Integrated Products

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 1

Copyright

©

2004

Rev. 1.2, 2005-12-02

SYNCHRONOUS BUCK CONVERTER
LX1918 EVALUATION BOARD

I N T E G R A T E D P R O D U C T S

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Summary of Contents for LX1918

Page 1: ...DE Microsemi Integrated Products 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 Page 1 Copyright 2004 Rev 1 2 2005 12 02 SYNCHRONOUS BUCK CONVERTER LX1918 EVALUATION BOARD I N T E G R A T E D P R O D U C T S ...

Page 2: ...ed Products 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 Page 2 Copyright 2004 Rev 1 2 2005 12 02 TABLE OF CONTENTS LX1918 EVAL Introduction 3 Schematic for LX1918 Evaluation Board 4 Hook Up 5 Connections 6 Bill of Materials 6 ...

Page 3: ...e Voltage Adjustment PFM or PWM Mode EMI Support With Force PWM Mode Light Load Support IOUT 300mA 95 Efficiency Quiescent Current Typical 400µA No External Schottky Diode Thermal Shutdown Cycle By Cycle Switch Current Limit UVLO Protection Current Limiting in Hiccup Mode 8 Pin MLP package 3mm2 APPLICATIONS Lower Power Embedded Applications WLAN Power Systems Portable Design with Single Cell LiIon...

Page 4: ... Fax 714 893 2570 Page 4 Copyright 2004 Rev 1 2 2005 12 02 SCHEMATIC FOR LX1918 EVAL R3 10K PVIN R5 40 C3 0 1µF GND C1 4 7µF VIN PVIN L1 3 3µH VOUT R1 1 5K R2 1K C2 47µF GND R4 10K PVIN PVIN AVIN MODE FB ES AGND PGND SW U1 LX1918 1 2 3 4 5 6 7 8 LO EMI HI EFF ENOSC SHDN P1 MODE P2 E S Figure 1 Evaluation Board Schematic ...

Page 5: ...high efficiency position 2 Place E S Jumper in ENOSC position 3 Apply 3 6V 2A input between VIN and GND 4 Connect to Load capable of handling the prescribed output Board is set to 1 5V output by default R2 R1 INTEGRATED PRODUCTS EVALUATION PCB LX1918 STEP DOWN SYNCHRONOUS CONVERTER L1 3 1 ENOSC SHDN LO EMI E S HI EFF VIN GND 3 1 MODE VOUT C1 R3 R4 VIN Vout U 1 R5 C3 C2 GND _ Power IN _ External SY...

Page 6: ...on feature the Mode Select must be in Lo EMI position BILL OF MATERIALS M I S C E L L A N E O U S C O M P O N E N T S Line Item Part Description Manufacturer Part Case Reference Designators Qty 1 1 5A Synchronous Buck Converter MICROSEMI LX1918CLD LD U1 1 2 Inductor 1 8A Shielded SMD 3 3µH COILCRAFT MOS6020 332MX L1 1 3 Header 3 Pin 100 P1 P2 2 4 Test Point 0 045 diameter Wire Loop KEYSTONE 5004_T...

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