MP3205

1.3MHz Fixed Frequency

5 White LED Driver

MP3205 Rev. 1.3

www.MonolithicPower.com

1

7/13/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

The Future of Analog IC Technology

TM

TM

DESCRIPTION

The MP3205 is a step-up converter designed

for driving up to 5 series white LEDs from a

single cell Lithium Ion battery. The MP3205

uses current mode, fixed frequency architecture

to regulate the LED current, which is measured

through an external current sense resistor. Its

low 104mV feedback voltage reduces power

loss and improves efficiency.

The MP3205 includes under-voltage lockout,

current limiting and thermal overload protection

preventing damage in the event of an output

overload. The MP3205 is available in a small

5-pin TSOT23 package.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV3205DJ-00A

1.9”X x 1.8”Y x 0.4”Z

FEATURES

• On Board Power MOSFET

• Drives up to 5 Series White LEDs

• Up to 87% Efficiency

• Over 1MHz Fixed Switching Frequency

• Low 104mV Feedback Voltage

• Soft-Start/PWM Dimming

• UVLO, Thermal Shutdown

• Internal Current Limit

• Available in a TSOT23-5 Package

APPLICATIONS

• Cell Phones

• Handheld Computers and PDAs

• Digital Still Cameras

• Small LCD Displays Application

“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION

MP3205

5V

LED1

LED2

LED3

LED4

LED5

EN

MP3205-TAC-S01

CMDSH-3

FB

3

SW

IN

1

5

EN

GND

4

2

88

87

86

85

84

83

82

81

80

79

78

77

5

101520

LED CURRENT (mA)

MP3205-EC01

Efficiency vs

LED Current

3 LEDs

4 LEDs

5 LEDs