MP3011

1x, 1.5x, 2x High Efficiency Charge Pump

2 White LED Driver

MP3011 Rev. 1.1

www.MonolithicPower.com

1

10/31/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

The Future of Analog IC Technology

TM

TM

DESCRIPTION

The MP3011 is a fully automatic driver for

powering two white LEDs, with up to 4V forward

voltage, from a single Li-Ion or three NiMH

cells. The driver performs all of the sensing and

control to run the LEDs at an optimum charge

pump ratio for efficiency without an expensive

inductor. The driver allows PWM operation to

support brightness control.

The tiny 3mm x 3mm QFN16 package and

small external capacitors allow for the most

compact white LED solution available.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV3011DQ-00A

2.4” x 1.9” x 0.4”

FEATURES

• 2% LED Current Matching

• High Efficiency (>93%)

• Current Source Outputs

• No Ballast Resistors Required

• 1x, 1.5x and 2x Automatic Modes

• Constant Frequency Operation

• Automatic LED Detection

• High and Low Frequency PWM Capability

• 2.5V to 5.5V Operation

• Detects Changes in Battery Level

• No External Schottky Diode Required

• Soft-Start and Soft Switching Operation

APPLICATIONS

• Cell Phones

• PDA or Hand Held Computers

• White LED Application at 3.6V Supply

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

Power Systems, Inc.

TYPICAL APPLICATION

MP3011

C1A

C1B

C2A

C2B

LED1

LED2

BATT

EN

RADJ

GND

LEDC

GND

ENABLE

BATT

LED2

LED1

MP3011_TAC01

4

7

6

9

15

16

5, 13

12

11

3, 10

8

100

90

80

70

60

50

40

30

20

10

0

2.5

3.0

3.5

4.0

4.5

SUPPLY VOLTAGE (V)

MP3011_EC01

Efficiency vs

Supply Voltage