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

MP2104DJ-1.8

MP2104DJ

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

OUT

EN

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

10

100

1000

LOAD CURRENT (mA)

MP2104-EC01

Efficiency vs

Load Current