TM
MP2104
1.7MHz, 600mA Synchronous
Step-Down Converter
The Future of Analog IC Technology
TM
DESCRIPTION
The MP2104 is a 1.7MHz constant frequency,
current mode, PWM step-down converter. The
device integrates a main switch and a
synchronous rectifier for high efficiency without an
external Schottky diode. It is ideal for powering
portable equipment that runs from a single cell
Lithium-Ion (Li+) battery. The MP2104 can supply
600mA of load current from a 2.5V to 6V input
voltage. The output voltage for the MP2104DJ
can be regulated as low as 0.6V, while the output
voltages
of
the
MP2104DJ-1.5
and
MP2104DJ-1.8 are fixed at 1.5V and 1.8V,
respectively. The MP2104 can also run at 100%
duty cycle for low dropout applications.
The MP2104 is available in a low profile (1mm)
5-pin, TSOT package.
ORDERING INFORMATION
Part Number
MP2104DJ-1.5
MP2104DJ-1.8
MP2104DJ
Board Number
EV2104DJ-00A
Output Voltage
V
OUT
= 1.5V
V
OUT
= 1.8V
V
OUT
= 0.6V to 6V
Dimensions
2.0鈥漍 x 2.0鈥漎 x 0.5鈥漐
FEATURES
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High Efficiency: Up to 95%
1.7MHz Constant Switching Frequency
600mA Available Load Current
2.5V to 6V Input Voltage Range
Output Voltage as Low as 0.6V
100% Duty Cycle in Dropout
Current Mode Control
Short Circuit Protection
Thermal Fault Protection
<0.1碌A Shutdown Current
1.5V and 1.8V Fixed Output Versions
Space Saving 5-Pin TSOT23 Package
Cellular and Smart Phones
Microprocessors and DSP Core Supplies
PDAs
MP3 Players
Digital Still and Video Cameras
Portable Instruments
APPLICATIONS
EVALUATION BOARD REFERENCE
鈥淢PS鈥?and 鈥淭he Future of Analog IC Technology鈥?are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
Efficiency vs
Load Current
100
INPUT
2.5V - 6V
4
IN
SW
3
MP2104DJ-1.8
OFF ON
1
EN
GND
2
OUT
5
EFFICIENCY (%)
OUTPUT
1.8V
600mA
90
80
70
60
50
40
30
20
10
0
V
IN
= 3.3V
V
IN
= 4.2V
MP2104_TAC_S01
10
100
LOAD CURRENT (mA)
1000
MP2104-EC01
MP2104 Rev. 1.3
10/4/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
漏 2005 MPS. All Rights Reserved.
1
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