EV1542DK-SEPIC-00A
700KHz/1.3MHz Boost Converter
with a 2A Switch
EVALUATION BOARD
EV1542DK-SEPIC-00A Rev. 1.0 www.MonolithicPower.com 1
6/15/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
The Future of Analog IC Technology
TM
TM
GENERAL DESCRIPTION
The EV1542DK-SEPIC-00A is the demo board
for sepic applications using the MP1542, a
current mode step up converter with a 2A,
0.18 internal switch to provide a highly
efficient regulator with fast response. The
EV1542DK-SEPIC-00A can be operated at
700KHz or 1.3MHz allowing for easy filtering
and low noise. An external compensation pin
gives the user flexibility in setting loop
dynamics, which allows the use of small, low
ESR ceramic output capacitors. The soft-start
results in small inrush current and can be
programmed with an external capacitor. The
EV1542DK-SEPIC-00A can operate from a
single Li-Ion battery to generate 3.3V at up to
500mA.
Other features include under voltage lockout,
current limiting and thermal overload protection,
all available in a low profile 8-pin MSOP
package.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Input Voltage V
IN
3 – 4.2 V
Output Voltage V
OUT
3.3 V
Output Current I
OUT
500 mA
FEATURES
• Automatic Up-Down Conversion
• Operates from a Single Li-Ion Battery to
Generate 3.3V at up to 500mA
• Uses Tiny Capacitors and Inductors
• Pin Selectable 700KHz or 1.3MHz Fixed
Switching Frequency
• Programmable Soft-Start
• UVLO, 2A Switch, Thermal Shutdown
• Internal Current Limit
APPLICATIONS
• LCD Displays
• Portable Applications
• Handheld Computers and PDAs
• Digital Still and Video Cameras
“MPS” and “Monolithic Power Systems”, are Trademarks of Monolithic
Power Systems, Inc.
EV1542DK-SEPIC-00A EVALUATION BOARD
Dimensions (2.0”X x 2.0”Y x 0.0”Z)
Board Number MPS IC Number
EV1542DK-SEPIC-00A MP1542DK
90
80
70
60
50
40
30
20
10
0
EFFICIENCY (%)
1 10 100 1000
LOAD CURRENT (mA)
EV1542_EC02
Efficiency vs
Load Current
V
IN
=4.2V
V
IN
=3.6V
V
IN
=3V
