MP2452

1A, 36V, 1MHz

Step-Down Converter

MP2452 Rev. 1.0

www.MonolithicPower.com

1

9/27/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2452 is a high frequency (1MHz) step-

down

switching

regulator

with

integrated

internal high-side high voltage power MOSFET.

It provides up to 1A highly efficient output

current with current mode control for fast loop

response.

The wide 3.3V to 36V input range accommodates

a variety of step-down applications in automotive

input environment. A 3µA shutdown mode

quiescent current allows use in battery-powered

applications.

High power conversion efficiency over a wide

load range is achieved by scaling down the

switching frequency at light load condition to

reduce the switching and gate driving losses.

Frequency fold-back helps prevent inductor current

runaway during start-up. Thermal shutdown

provides reliable, fault-tolerant operation.

The MP2452 is available in the 2mm x 3mm QFN8

package.

FEATURES

• 1A Continuous Load Current

• 130 µA Operating Quiescent Current

• Wide 3.3V to 36V Operating Input Range

• 500 mΩ Internal Power MOSFET

• 1MHz fixed Switching Frequency

• Internally compensated

• Stable with Ceramic Output Capacitors

• Internal Soft-Start

• > 90% Efficiency

• +0.794V FB Reference Voltage

• Output Adjustable from +0.794V to 33V

• 3µA Low Shutdown Supply Current

• 2mm x 3mm QFN8 Package

APPLICATIONS

• High Voltage Power Conversion

• Automotive Systems

• Industrial Power Systems

• Distributed Power Systems

• Battery Powered Systems

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

Monolithic Power Systems, Inc..

TYPICAL APPLICATION

MP2452

SW

VIN

EN

FB

GND

BST

NC

NC

2

18

6

4

3

7

5

C1

C3

10pF

C4

L1

6.8uH

100nF

D1

5V/1A

Control

o

o

o

Efficiency

OUTPUT CURRENT(mA)

50

55

60

65

70

75

80

85

90

95

100

10

100

1000