EV0077 (MP1541)
1.3MHz Low Power
Boost Converter
Monolithic Power Systems
EVALUATION BOARD - INITIAL RELEASE
GENERAL DESCRIPTION
The EV0077 Evaluation Board is designed to
demonstrate the capabilities of MPS’ MP1541.
The MP1541 is a 5-pin thin SOT23 current
mode step up converter intended for small, low
power applications. The MP1541 switches at
1.3MHz and allows the use of tiny, low cost
capacitors and inductors 2mm or less in height.
Internal soft start results in small inrush current
and extends battery life. The MP1541 operates
from an input voltage as low as 2.5V and can
generate 12V at up to 200mA from a 5V supply.
The MP1541 includes under-voltage lockout,
current limiting, and thermal overload protection
to prevent damage in the event of an output
overload. The MP1541 is available in a small
5-pin TSOT23 package.
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
On Board Power MOSFET
Uses Tiny Capacitors and Inductors
1.3MHz Fixed Switching Frequency
Internally Compensated
Internal Soft Start
Operates with Input Voltage as Low as 2.5V
and Output Voltage as High as 22V
12V at 200mA from 5V Input
UVLO, Thermal Shutdown
Internal Current Limit
Available in a TSOT23-5 Package
Camera Phone Flash
Handheld Computers and PDAs
Digital Still and Video Cameras
External Modems
Small LCD Displays
White LED Driver
APPLICATIONS
ELECTRICAL SPECIFICATION
Parameter
Supply Voltage
Output Voltage
Output Current
Symbol
V
IN
V
OUT
I
OUT
Value
2.5 – 6
12
0.2
Units
V
V
A
, “MPS”, “Monolithic Power Systems”, and “The Future of Analog IC
Technology” are Registered Trademarks of Monolithic Power Systems, Inc.
EV0077 EVALUATION BOARD
Efficiency vs Load Current
100
95
90
V
IN
= 5V
EFFICIENCY (%)
85
80
75
70
65
60
55
50
V
IN
= 3.3V
V
IN
= 4.2V
(2.5”X x 2.5”Y x 0.8”Z)
Board Number
EV0077 Rev. A
MPS IC Number
MP1541
0
75 150 225 300 375 450
LOAD CURRENT (mA)
EV0077_MP1541_PC01
06/04, Rev. 1.0
www.MonolithicPower.com
1
MPS [ MONOLITHIC POWER SYSTEMS ]
