MP2104
1.7MHz, 600mA Synchronous
Step-Down Converter
MP2104 Rev. 1.3 www.MonolithicPower.com 1
10/4/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
The Future of Analog IC Technology
TM
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 Output Voltage
MP2104DJ-1.5 V
OUT
= 1.5V
MP2104DJ-1.8 V
OUT
= 1.8V
MP2104DJ V
OUT
= 0.6V to 6V
EVALUATION BOARD REFERENCE
Board Number Dimensions
EV2104DJ-00A 2.0”X x 2.0”Y x 0.5”Z
FEATURES
• 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
• <0.1µA Shutdown Current
• 1.5V and 1.8V Fixed Output Versions
• Space Saving 5-Pin TSOT23 Package
APPLICATIONS
• Cellular and Smart Phones
• Microprocessors and DSP Core Supplies
• PDAs
• MP3 Players
• Digital Still and Video Cameras
• Portable Instruments
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
MP2104DJ-1.8
SW
3
5
2
1
4
OUTEN
GND
IN
OUTPUT
1.8V
600mA
INPUT
2.5V - 6V
MP2104_TAC_S01
OFF ON
100
90
80
70
60
50
40
30
20
10
0
EFFICIENCY (%)
10 100 1000
LOAD CURRENT (mA)
MP2104-EC01
Efficiency vs
Load Current
V
IN
= 3.3V
V
IN
= 4.2V