EV2351DQ-00A
4.75V to 23V Input, 1.5A Output
Step-Down DC/DC Converter
EVALUATION BOARD - INITIAL RELEASE
EV2351DQ-00A Rev. 1.1 www.MonolithicPower.com 1
3/29/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
The Future of Analog IC Technology
GENERAL DESCRIPTION
The EV2351DQ-00A is the Evaluation Board for
MPS’ MP2351 Step-Down DC/DC Converter. It
features a wide supply range of 4.75V to 23V
and a continuous output current up to 1.5A. The
output voltage is set to 3.3V, but can be easily
adjusted to other levels from 1.22V. A 1.4MHz
high switching frequency allows the use of
small, low cost capacitors and inductors.
Current mode control and an integrated power
MOSFET minimize component count, board area,
and solution cost. Fault condition protection
includes cycle-by-cycle current limiting, thermal
shutdown, and under-voltage lockout. Internal
soft-start reduces the turn-on stress. The small
10-pin QFN package minimizes board area.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Supply Voltage V
IN
4.75 – 23 V
Output Voltage V
OUT
5 V
Output Current I
OUT
0 – 1.5 A
FEATURES
• Up to 1.5A Output Current
• Wide 4.75 to 23V Operating Input Range
• Monolithic Buck with 180m Internal FET
• Fixed 1.4MHz Frequency
• All Ceramic Input and Output Capacitors
• Programmable Input Under-Voltage Lockout
APPLICATIONS
• Distributed Power Systems
• Battery Chargers
• DSL Modems
• Pre-Regulators for Linear Regulators
“MPS” and “The Future of Analog IC Technology”, are Registered Trademarks
of Monolithic Power Systems, Inc.
EV2351DQ-00A EVALUATION BOARD
Dimensions (2.1”X x 1.3”Y x 0.4”Z)
Board Number MPS IC Number
EV2351DQ-00A MP2351
V
OUT
=5V
V
OUT
=2.5V
V
OUT
=3.3V
100
90
80
70
60
50
40
EFFICIENCY (%)
0 1500300 600 900 1200
LOAD CURRENT (mA)
MP2351-EC01
Efficiency vs
Load Current
