MP1522
25V Step-Up Converter
in a SOT23-5 Package
MP1522 Rev. 2.0 www.MonolithicPower.com 1
9/1/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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 0.5
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 packages.
EVALUATION BOARD REFERENCE
Board Number Dimensions
EV0022 2.2”X x 1.5”Y x 0.5”Z
FEATURES
• Internal 0.5 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 Packages
APPLICATIONS
• Handheld Computers, PDAs
• Cell Phones
• Digital Still and Video Cameras
• Small LCD Displays
“MPS” and “The Future of Analog IC Technology” are Registered
Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP1522
BIAS
FB
SW
GND
EN
2
4
3
5
1
OFF ON
V
OUT
20V
V
IN
3.3V
C2
1nF
D1
RB751
EFFICIENCY (%)
100
90
80
70
60
50
LOAD CURRENT (mA)
Efficiency vs Load Current
with BIAS Tied to V
OUT
1 10010 1000
3.3V
5.0V
10V
V
OUT
= 12V
