MP2136

2.5V to 6V Input, 2MHz, 1A

Synchronous Step-Down Converter

MP2136 Rev. 0.9

www.MonolithicPower.com

1

8/23/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2136 is a 2MHz constant frequency,

current mode, PWM step-down converter with

integrated

main

switch

and

synchronous

rectifier that is ideal for powering portable

equipment that runs from a single Li-Ion or Li-

Polymer battery.

The MP2136 can supply up to 1A load current

from a 2.5V to 6V input voltage. The output

voltage can be as low as 0.6V.

Additional features include <1µA shutdown

current, internal soft-start, cycle-by-cycle over

current protection, short circuit protection, and

thermal shutdown.

The MP2136 is available in a 6-pin, QFN6

2mm×2mm package.

FEATURES

• 2MHz Constant Switching Frequency

• 1A Available Load Current

• 2.5V to 6V Input Voltage Range

• Output Voltage as Low as 0.6V

• Current Mode Control

• Cycle-by-Cycle Over Current Protection

• Short Circuit Protection

• Thermal Shutdown

• <1µA Shutdown Current

• Internal Soft-Start

• Space-Saving 6-pin, QFN6 2mm×2mm

package

APPLICATIONS

• Cellular Phones

• Microprocessors and DSP Core Supplies

• PDAs and Smart Phones

• MP3 and Portable Media Players

• Digital Still and Video Cameras

• Portable Instruments

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

VIN

IN

EN

NC

GND

FB

SW

VOUT

EN

OFF ON

2.5V - 6V

1.2V/1A

C2

10uF

R2

300k

1%

R1

300k

1%

L1

1.2uH

U1

MP2136EG

3

2

1

5

6

4

C1

4.7uF

Efficiency vs.

Output Current

L=2.2uH Vo=1.2V

0

10

20

30

40

50

60

70

80

90

100

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1

Vin=3.3V

Vin=5V

Vin=2.5V

Vin=6V

OUTPUT CURRENT (A)