MP2276

8A, 4-16V Input, High-Efficiency Synchronous

Step-Down Converter with Programmable Current

Limit and Soft Start Time Selectable Frequency

and Mode of Operation

MP2276 Rev.1.0

www.MonolithicPower.com

1

3/22/2017

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

© 2017 MPS. All Rights Reserved.

DESCRIPTION

The

MP2276

is

a

fully

integrated,

high-

frequency, synchronous, rectified, step-down,

switch-mode converter. It offers a very compact

solution that achieves up to 8A of continuous

output current with excellent load and line

regulation over a wide input supply range. The

MP2276 operates at high efficiency over a wide

output current load range.

The MP2276 uses constant-on-time (COT)

control for fast transient response and eased

loop stabilization.

Output voltage start-up is controlled by an

internal 1.7ms timer, which can be increased by

adding a capacitor on SS/TRK. An open-drain

power good (PG) signal indicates when the

output is within its nominal voltage range.

Full protection features include over-current

protection

(OCP),

over-voltage

protection

(OVP), under-voltage protection (UVP), and

over-temperature protection (OTP).

The MP2276 requires a minimal number of

readily

available,

standard,

external

components and is available in a QFN-14

(2mmx3mm) package.

FEATURES

 Wide 4V to 16V Input Voltage Range

 8A Continuous Output Current

 24mΩ/10mΩ Low R

MOSFETs

 Adaptive Constant-On-Time (COT) for

Ultrafast Transient Response

 Stable with Zero ESR Output Capacitor

 Programmable Current Limit

 Selectable Forced CCM or Pulse-Skip

Operation at Light Load

 Excellent Load Regulation

 Programmable Soft-Start Time from 1.7ms

 Pre-Bias Start-Up

 Selectable 600kHz, 1100kHz, or 2000kHz

Switching Frequency

 Hiccup Over-Current Protection (OCP)

 Auto-Retry Over-Voltage Protection (OVP)

and Thermal Shutdown

 Output Adjustable from 0.8V

 Available in a QFN-14 (2mmx3mm)

Package

APPLICATIONS

 Digital Set-Top Boxes

 Flat-Panel TV and Monitors

 Distributed Power Systems

All MPS parts are lead-free, halogen-free, and adhere to the RoHS

directive. For MPS green status, please visit the MPS website under

Quality Assurance.

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

registered trademarks of Monolithic Power Systems, Inc.

TYPICAL APPLICATION

EN

FB

BST

VIN

PG

SW

Vin

MP2276

Vout

VCC

PGND

ILIM

AGND

C1

C3

C4

1µF

L1

1µH

R1

2kΩ

R2

8.06kΩ

C2

C6

1.5nF

EN

PG

R3

SS/TRK

FREQ/MODE

22µF

47µFx2

3.6kΩ

1V

C5

1µF

15nF

Efficiency vs. Output Current

4.6mΩ)

40

50

60

70

80

90

100

0.01

0.10

1.00

10.00

Output Current(A)

Vin=5V

Vin=12V

Vin=16V