MP2370

1.2A, 24V, 1.4MHz Step-Down

White LED Driver in a TSOT23-6

MP2370 Rev. 0.96

www.MonolithicPower.com

1

9/21/2007

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2007 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2370 is a monolithic step-down white

LED driver with a built-in power MOSFET. It

achieves 1.2A peak output current over a wide

input supply range with excellent load and line

regulation. Current mode operation provides

fast transient response and eases loop

stabilization. Fault condition protection includes

cycle-by-cycle current limiting and thermal

shutdown.

The MP2370 requires a minimum number of

readily available standard external components.

The MP2370 is available in a TSOT23-6 package.

FEATURES

• 1.2A Peak Output Current

• 0.35Ω Internal Power MOSFET Switch

• Stable with Low ESR Output Ceramic

Capacitors

• Also Work with Cap-less Configuration

• Up to 87% Efficiency

• 0.1μA Shutdown Mode

• Fixed 1.4MHz Frequency

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Wide 4.5V to 24V Operating Input Range

• 0.15V Sense Voltage

• Available in a TSOT23-6 Package

APPLICATIONS

•

WLED Drivers

•

Distributed Power Systems

•

Battery Charger

•

Pre-Regulator for Linear Regulators

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

SW

FB

BST

GND

IN

EN

1

6

3

2

4

5

OFF ON

0.1

60

70

80

90

100

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

OUTPUT CURRENT (A)

Efficiency vs

Output Current

Circuit as Figure 1