EV1570DN-00A

3A, 23V, 340KHz

Synchronous Step-Down Converter

EVALUATION BOARD – INITIAL RELEASE

EV1570DN-00A Rev. 1.1

www.MonolithicPower.com

1

4/6/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

The Future of Analog IC Technology

GENERAL DESCRIPTION

The EV1570DN-00A is the evaluation board of

MPS’ MP1570 synchronous buck converter. It

has a wide supply range from 4.75V to 23V and

a continuous output current up to 3A. It features

synchronous rectification for high efficiency with

integrated

high-side

and

low-side

power

MOSFETs. The output voltage is set to 3.3V,

but can be easily adjusted to other levels from

1.22V. Current mode control and integrated

power MOSFETs minimize component counts,

board area, and solution cost. Fault condition

protections include cycle-by-cycle current limiting,

thermal shutdown, over voltage protection and

under voltage lockout. Internal soft-start reduces

turn-on stress. Small but thermally enhanced

SO-8 package minimizes board area with

excellent thermal management.

ELECTRICAL SPECIFICATIONS

Parameter

Symbol

Value

Units

Supply Voltage

4.75 to 23

V

Output Voltage

3.3

V

Output Current

0 to 3

A

FEATURES

• Up to 3A Output Current

• Wide 4.75V to 23V Operating Input Range

• Monolithic Synchronous Buck with 100mΩ

High-Side and Low-Side FETs

• Fixed 340KHz Frequency

• All Ceramic Input and Output Capacitors

• Programmable Soft-Start

• Programmable Input Under Voltage Lockout

APPLICATIONS

• Distributed Power Systems

• Pre-Regulator for Linear Regulators

• Notebook Computers

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

Trademarks of Monolithic Power Systems, Inc.

EV1570DN-00A EVALUATION BOARD

(2”X x 1.5”Y x 0.5”Z)

Board Number

MPS IC Number

EV1570DN-00A

MP1570

100

95

90

85

80

75

70

65

60

55

50

0

1.0

2.0

3.0

2.5

1.5

0.5

3.5

LOAD CURRENT (A)

MP1570-EC01

Efficiency vs

Load Current