MP1498

High-Efficiency, 2A, 16V, 1.4MHz

Synchronous, Step-Down Converter

MP1498 Rev. 1.01

www.MonolithicPower.com

1

12/18/2012

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

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP1498 is a high-frequency, synchronous,

rectified, step-down, switch-mode converter

with built-in internal power MOSFETs. It offers a

very compact solution to achieve 2A continuous

output current with excellent load and line

regulation over a wide input supply range. The

MP1498 has synchronous mode operation for

higher efficiency over the output current load

range.

Current-mode

operation

provides

a

fast

transient response and eases loop stabilization.

Protective

features

include

over-current

protection, thermal shutdown, and external SS

control.

The MP1498 requires a minimal number of

readily-available external components and is

available in a space-saving 8-pin TSOT23

package.

FEATURES

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

MOSFETs

 Proprietary Switching-Loss–Reduction

Technique

 High-Efficiency Synchronous Mode

Operation

 Fixed 1.4MHz Switching Frequency

 Can Synchronize to a 300kHz-to-3MHz

External Clock

 Externally-Programmable Soft-Start

 OCP 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 Televisions 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 Products, Quality Assurance page.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP1498

IN

EN/SYNC

VCC

SS

GND

FB

SW

BST

VIN

EN/

SYNC

C3

0.1 F

R1

40.2k

R2

13k

L1

2.2 H

C2

22 F

C4

0.1 F

C1

22 F

2

5

6

7

1

3

8

4

3.3V/2A

R3

20

C5

22nF

R5

24k

50

55

60

65

70

75

80

85

90

95

100

0.0

0.4

0.8

1.2

1.6

2.0