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User's Guide
SNVA180A–October 2006–Revised April 2013
AN-1513 LM2853 Evaluation Board
1 Introduction
The LM2853 synchronous SIMPLE SWITCHER
®
buck regulator is a synchronous switching regulator
capable of delivering up to 3A of current into a load. The LM2853 represents the ultimate in ease of use,
as internal type-3 compensation minimizes the necessary external components and eases the selection of
those components. The LM2853 is capable of accepting an input voltage between 3.0V and 5.5V and
delivering an output voltage that is factory programmable from 0.8V to 3.3V in 100mV increments. The
nominal switching frequency of the LM2853 is 550 kHz.
The LM2853 Evaluation Board was designed to accommodate three standard output voltage options
(1.2V/1.8V/3.3V) using the same layout and external components. Just five external components are
included on the board, and the entire 3A power supply occupies a minimum amount of space (1.2” by
0.82”) on a two layer PCB without sacrificing efficiency or performance. The input voltage can be varied
over the entire operating range of the LM2853 (3.0V to 5.5V) for testing purposes. Also, the board is
designed to be stable with all standard LM2853 voltage options, so if another voltage option needs to be
tested, the LM2853 IC can be removed and replaced with the desired option.
2 Schematic
3 Bill Of Materials
ID Part Number Type Size Parameters Qty Vendor
U1 LM2853 3A Buck HTSSOP-14 x.xV 1 Texas
Instruments
C
IN
GRM31CR60J476ME19 Capacitor 1206 47 μF 1 Murata
C
BYP
GRM21BR71C105KA01 Capacitor 0805 1 µF 1 Murata
C
SS
VJ0805Y222KXXA Capacitor 0603 2.2 nF 1 Vishay-Vitramon
L
O
DO3316P-472 Inductor DO3316P 4.7 µH 1 Coilcraft
C
O
TPSD227X06R0050 Capacitor D Case 220 µF 1 Vishay-Sprague
(50 mΩ)
SIMPLE SWITCHER is a registered trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
1
SNVA180A–October 2006–Revised April 2013 AN-1513 LM2853 Evaluation Board
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Copyright © 2006–2013, Texas Instruments Incorporated

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