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EV0033

1.2A, 6V, 800KHz Synchronous Rectified Step-Down Converter

Monolithic Power Systems 

The Future of Analog IC Technology

EV0033 (MP1567)

1.2A, 6V, 800KHz Synchronous Rectified

Step-Down Converter

EVALUATION BOARD

GENERAL DESCRIPTION

The MP1567 is a 1.2A, 800KHz DC to DC

converter designed for low voltage applications

requiring high efficiency. Capable of providing

output voltages as low as 0.9V from a 3.3V

supply voltage, the MP1567 eliminates the

need for a 5V rail, providing over 90% efficiency

via synchronous rectification and eliminating

heat issues in confined spaces. Soft-start

operation protects internal circuitry from hard

turn on issues. Switching at 800KHz reduces

the size of external components and thereby

reduces board space.

The MP1567 includes cycle-by-cycle current

limiting and under voltage lockout. Internal

power switches combined with the tiny 10-pin

MSOP or QFN packages provide a solution

requiring a minimum of space.

ELECTRICAL SPECIFICATIONS

Parameter

Input Voltage

Output Voltage

Output Current

Symbol

VIN

VOUT

IOUT

Value

2.6 to 6

1.8

1.2

Units

V

V

A

FEATURES

• 1.2A Output Current

• Synchronous Rectified

• Internal 180mΩ and 220mΩ Power Switches

• VIN Range of 2.6V to 6V

• Over 90% Efficiency

• Zero Current Shutdown Mode

• Under Voltage Lockout Protection

• Soft-Start Operation

• Thermal Shutdown

• Internal Current Limit (Source & Sink)

• Tiny 10-Pin MSOP Package

APPLICATIONS

• SOHO Routers, PCMCIA Cards, Mini PCI

• Handheld Computers, PDAs

• Cell Phones

• Digital Video Cameras

• Small LCD Displays

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

of Monolithic Power Systems, Inc.

EV0033 EVALUATION BOARD

Dimensions (2.5”X x 2.0”Y x 0.4”Z)

Board Number

MPS IC Number

EV0033

MP1567DK

Efficiency vs

Load Current

100

90 VIN=3.3V

80

70

60

VIN=4V

50

40

VIN=5V

30

20

10

VOUT=1.8V

0

10

100

1000

LOAD CURRENT (mA)

MP1567_EC01

EV0033 Rev. 1.4

www.MonolithicPower.com

1

4/22/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

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