MP1522
25V Step-Up Converter
in a SOT23-5 Package
The Future of Analog IC Technology
DESCRIPTION
The MP1522 is a step up converter that
generates up to a 25V output voltage from a
2.7V to 25V input. It uses a current limited
Variable Frequency control algorithm to
optimize efficiency and minimize external
component size and cost. The internal 0.5Ω
N-Channel MOSFET switch can withstand up to
28V allowing the MP1522 to produce high
output voltage with high efficiency.
The MP1522 includes input under voltage and
over temperature protection. The MP1522 is
available in tiny 5-pin SOT23 and 3x3 QFN6
packages.
FEATURES
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Internal 0.5Ω Power Switch
Output Voltage up to 25V
Up to 90% Efficiency
Low 1µA Shutdown Current
Input Under Voltage Protection
Thermal Shutdown
Internal Current Limit
Available in Tiny 5-Pin SOT23 and 6-Pin
3x3 QFN Packages
Handheld Computers, PDAs
Cell Phones
Digital Still and Video Cameras
Small LCD Displays
APPLICATIONS
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EVALUATION BOARD REFERENCE
Board Number
EV0022
Dimensions
2.2”X x 1.5”Y x 0.5”Z
“MPS” and “The Future of Analog IC Technology” are Registered
Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
V
IN
3.3V
100
90
Efficiency vs Load Current
with BIAS Tied to V
OUT
10V
5.0V
3.3V
OFF ON
4
EN
SW
1
5
3
V
OUT
20V
C2
1nF
EFFICIENCY (%)
D1
RB751
80
70
60
MP1522
2
GND
BIAS
FB
V
OUT
= 12V
50
1
MP1522_TAC_S01
10
100
1000
MP1522_TAC_EC01
LOAD CURRENT (mA)
MP1522 Rev. 1.9
12/9/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
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