MP2113

1.5A Synchronous Step-Down Converter

with Dynamic Voltage Control

MP2113 Rev. 1.0

www.MonolithicPower.com

1

4/4/2011

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2113 is a fully integrated, internally

compensated 1.5MHz fixed frequency PWM

step-down converter with dynamic output

voltage control. User can select two operation

modes, forced PWM and asynchronous mode.

Force PWM is ideal for high load operation

while asynchronous mode improves efficiency

at light load condition. Each mode has

independent output level that can be set by the

user to optimize the power efficiency. It is ideal

for powering portable equipment that runs from

a single cell Lithium-Ion (Li+) Battery, with an

input range from 2.7V to 6V. The MP2113 can

provide 1.5A of load current in forced PWM

mode and 50mA in asynchronous mode. Both

output voltage can be regulated to as low as

0.6V.

MP2113 integrates the high side switch, a

synchronous rectifier for forced PWM mode and

a Schottky diode for asynchronous mode

operation. With peak current mode control and

internal compensation, the MP2113 is stable

with ceramic capacitors and small inductors.

Fault condition protection includes cycle-by-

cycle current limiting and thermal shutdown.

MP2113 is available in the small 8-pin

2mmx3mm QFN package.

FEATURES

• User Selectable Operation Mode: Forced

PWM and Asynchronous Mode

• User Programmable Output Level for Each

Operation Mode

• Dynamic Output Voltage Control

• Up to 1.5A Output Current for Forced PWM

Mode, 50mA for Asynchronous Mode

• Internal Power MOSFET Switches and

Schottky diode

• Stable with Low ESR Output Ceramic

Capacitors

• Up to 95% Efficiency

• 1µA Shutdown Current.

• 1.5MHz Switching Frequency

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Short circuit protection

• Power-Good Output

• 2.7-6V Input Operation Range

• Output Adjustable from 0.6V to VIN

• Available in 8-pin 2x3mm QFN Package

APPLICATIONS

• DVD+/-RW Drives

• Smart Phones

• PDAs

• Digital Cameras

• Portable Instruments

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

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP2113

FB

DRN

EN

GND

IN

2.7-6V

1.8V/1.5A

SW

PGOOD

CTRL

4.7uF

22uF

R3

200K

R2

604K

R1

301K

L1

2.2uH

R4

500K

Efficiency vs. Load Current

60

65

70

75

80

85

90

95

0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5

LOAD CURRENT(A)

Vin=3V

Vin=5V

Vin=6V