EV2309DS-00A
1A, 23V, 340KHz Synchronous
Step-Down Converter Evaluation Board
EV2309DS-00A Rev. 1.3 www.MonolithicPower.com 1
9/29/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
The Future of Analog IC Technology
TM
TM
GENERAL DESCRIPTION
The EV2309DS-00A is an evaluation board for
the MP2309, a monolithic synchronous buck
regulator. The device integrates 140m
MOSFETS that provide 1A continuous load
current over a wide operating input voltage of
4.75V to 23V. Current mode control provides
fast transient response and cycle-by-cycle
current limit.
An adjustable soft-start prevents inrush current
at turn-on. In shutdown mode, the supply
current is only 1µA.
This device, available in an 8-pin SOIC
package, provides a very compact system
solution with minimal reliance on external
components.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Supply Voltage V
IN
4.75 to 23 V
Output Voltage V
OUT
3.3 V
Output Current I
OUT
0 to 1 A
FEATURES
• Up to 1A Output Current
• Wide 4.75V to 23V Operating Input Range
• Monolithic Synchronous Buck with 140m
High-Side and Low-Side FETs
• Fixed 340KHz Frequency
• All Ceramic Input and Output Capacitors
• Programmable Soft-Start
• Programmable Input Under Voltage Lockout
APPLICATIONS
• Distributed Power Systems
• Networking Systems
• FPGA, DSP, ASIC Power Systems
• Green Electronics/ Appliances
• Notebook Computers
“MPS” and “The Future of Analog IC Technology” are Trademarks of
Monolithic Power Systems, Inc.
EV2309DS-00A EVALUATION BOARD
(L x W x H) 2.0” x 1.5” x 0.5”
(5.0cm x 3.8cm x 1.2cm)
Board Number MPS IC Number
EV2309DS-00A MP2309
100
90
80
70
60
50
40
30
20
EFFICIENCY (%)
0 0.5 1.00.750.25
LOAD CURRENT (A)
MP2309-EC01
Efficiency vs
Load Current
V
IN
= 5V
V
IN
= 12V
V
IN
= 23V