MP1542
700KHz/1.3MHz Boost Converter
with a 2A Switch
The Future of Analog IC Technology
DESCRIPTION
The MP1542 is a current mode step up
converter with a 2A, 0.18Ω internal switch to
provide a highly efficient regulator with fast
response. The MP1542 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. Soft-start
results in small inrush current and can be
programmed with an external capacitor. The
MP1542 operates from an input voltage as low
as 2.5V and can generate 12V at up to 500mA
from a 5V supply.
The MP1542 includes under-voltage lockout,
current limiting and thermal overload protection
preventing damage in the event of an output
overload. The MP1542 is available in low profile
8-pin MSOP packages.
FEATURES
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2A, 0.18Ω, 25V Power MOSFET
Uses Tiny Capacitors and Inductors
Pin Selectable 700KHz or 1.3MHz Fixed
Switching Frequency
Programmable Soft-Start
Operates with Input Voltage as Low as 2.5V
and Output Voltage as High as 22V
12V at 500mA from 5V Input
UVLO, Thermal Shutdown
Internal Current Limit
Available in 8-Pin MSOP Packages
LCD Displays
Portable Applications
Handheld Computers and PDAs
Digital Still and Video Cameras
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
EVALUATION BOARD REFERENCE
Board Number
EV1542DK-00A
Dimensions
2.0”X x 2.0”Y
TYPICAL APPLICATION
V
IN
3.3V
D1
V
OUT
8V
Efficiency vs
Load Current
95
90
85
80
75
70
65
60
55
50
1
V
IN
= 3.3V
V
OUT
= 8V
10
100
LOAD CURRENT (mA)
1000
6
7
OFF ON
3
8
IN
FSEL
EN
SS
5
SW
FB
2
MP1542
GND
4
COMP
1
C3
2.2nF
C4
10nF
MP1542_TAC01
EFFICIENCY (%)
MP1542-EC02
MP1542 Rev. 1.2
12/14/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
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