MP2116

2A, 6V, 100% Duty Cycle Synchronous

Step-Down Converter with 0.5A LDO

MP2116 Rev.1.0

www.MonolithicPower.com

1

1/17/2013

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication

© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2116 is an internally compensated

1.25MHz, 2A synchronous step-down switching

DC-DC converter plus a standalone low-input

voltage, 0.5A low dropout (LDO) linear regulator.

It is ideal for powering portable equipment that

operates from a single cell Lithium-Ion (Li+)

Battery. The MP2116 can provide up to 2A to

the switcher output, and 0.5A load current to

the LDO output from a 2.5V to 6V input voltage.

Both output voltages can be regulated as low

as 0.6V.

The

2A

Synchronous

switcher

features

integrated high-side and low-side switch for

high efficiency and small footprint. With peak

current mode control and internal compensation,

the MP2116 is stable with ceramic capacitors.

Fault condition protection includes cycle-by-

cycle current limiting and thermal shutdown.

The standalone low-input voltage 0.5A LDO is

used to power noise sensitive circuitry. The

LDO’s separate input supply pin (IN2) can be

connected to the switcher output to reduce

power dissipation and noise from the main

switcher.

MP2116 is available in the small 10-pin

3mmx3mm QFN package.

FEATURES

• 100% Duty Cycle Low Dropout Operation

(High-Side PFET)

• Internal Power MOSFET Switches

• Stable with Ceramic Capacitors

• Up to 95% Efficiency for Switcher

• 1.25MHz Switching Frequency

• Internal Soft-start for Switcher

• 2.5V to 6V Input Range, for Switcher

• 0.5A LDO Output Current

• 1μA Shutdown Current

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Short Circuit Protection

• Power OK Output

• Available in 10-Pin QFN Package

APPLICATIONS

• DVD+/-RW Drives

• Smart Phones

• PDAs

• Digital Cameras

• Portable Instruments

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

MP2116

FB1

EN1

IN1

SW1

IN2

5

9

8

7

10

1

2

3

4

6

FB2

EN2

PWROK

OUT2

GND

OUT2

1.2V @ 0.5A

POWER OK

*OUT1

1.8V @ 1.5A

R1

499k

Ω

R2

249k

Ω

R3

60k

Ω

R4

60k

Ω

R5

500k

Ω

4.7

μF

10

μF

L

22

μF

OFF ON

2.5V - 6V

2.2

μF

100

90

80

70

60

50

40

30

20

10

0

10

100

10000

1000

LOAD CURRENT (mA)

Efficiency vs

Load Current