MP1474

High-Efficiency, 2A, 16V, 500kHz

Synchronous, Step-Down Converter

MP1474 Rev. 1.0

www.MonolithicPower.com

1

9/26/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP1474 is a high-frequency, synchronous,

rectified, step-down, switch-mode converter

with built-in power MOSFETs. It offers a very

compact solution to achieve a 2A continuous

output current with excellent load and line

regulation over a wide input supply range. The

MP1474 has synchronous mode operation for

higher efficiency over the output current load

range.

Current-mode operation provides fast transient

response and eases loop stabilization.

Full protection features include over-current

protection and thermal shut down.

The MP1474 requires a minimal number of

readily-available standard external components,

and is available in a space-saving 8-pin

TSOT23 package.

FEATURES

 Wide 4.5V-to-16V Operating Input Range

MOSFETs

 High-Efficiency Synchronous Mode

Operation

 Fixed 500kHz Switching Frequency

 Synchronizes from a 200kHz-to-2MHz

External Clock

 Power-Save Mode at Light Load

 Internal Soft-Start

 Power Good Indicator

 OCP Protection and Hiccup

 Thermal Shutdown

 Output Adjustable from 0.8V

 Available in an 8-pin TSOT-23 Package

APPLICATIONS

 Notebook Systems and I/O Power

 Digital Set-Top Boxes

 Flat-Panel Television and Monitors

 Distributed Power Systems

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Quality Assurance. “MPS” and “The

Future of Analog IC Technology” are Registered Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION

MP1474

IN

EN/SYNC

VCC

PG

GND

FB

SW

BST

VIN

EN/

SYNC

C5

0.1

R1

40.2k

R2

13k

R5

100k

L1

C2

47

C4

C1

4.5V-16V

3.3V/2A

22

2

6

7

1

5

3

8

4

R6

16k

R3

20

OUTPUT CURRENT (A)

Efficiency vs.

Output Current

50

55

60

65

70

75

80

85

90

95

100

0.0

0.4

0.8

1.2

1.6

2.0