MP2269

Synchronous, Step-Down Converter

with External Soft Start and Power Good

in 2x3mm QFN Package

MP2269 Rev. 1.0

www.MonolithicPower.com

1

10/11/2016

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

© 2016 MPS. All Rights Reserved.

DESCRIPTION

The MP2269 is a frequency-programmable

(350kHz to 2.5MHz), synchronous, step-down,

switching regulator with integrated, internal,

high-side and low-side power MOSFETs. The

MP2269 provides 1A of highly efficient output

current with current-mode control for fast loop

response.

The

wide

3.3V

to

30V

input

range

accommodates

a

variety

of

step-down

applications. A 1

μA shutdown mode quiescent

current allows the MP2269 to be used in

battery-powered applications.

High power conversion efficiency over a wide

load range is achieved by scaling down the

switching frequency at light-load condition to

reduce switching and gate driving losses.

An open-drain power good signal indicates the

output signal. Frequency foldback helps prevent

inductor

current

runaway

during

start-up.

Thermal shutdown provides reliable and fault-

tolerant operation. High duty cycle and low

drop-out

mode

are

provided

for

battery-

powered systems.

The

MP2269

is

available

in

a

QFN-15

(2mmx3mm) package.

FEATURES

 Wide 3.3V to 30V Operating Voltage Range

 1A Continuous Output Current

 1μA Low Shutdown Supply Current

 12μA Sleep Mode Quiescent Current

 180mΩ/80mΩ High-Side/Low-Side R

DS(ON)

for Internal Power MOSFETs

 350kHz to 2.5MHz Programmable Switching

Frequency

 Power Good Output

 External Soft Start

 80ns Minimum On Time

 Selectable Forced PWM Mode and Auto

PFM/PWM Mode

 Low Dropout Mode

 Hiccup Over-Current Protection (OCP)

 Available in a QFN-15 (2mmx3mm)

Package

APPLICATIONS

 Battery-Powered Systems

 Smart Homes

 Wide Input Range Power Supplies

 Standby Power Supplies

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

MP2269

VIN

EN

VIN

FREQ

FB

BST

VOUT

SW

NC

VCC

BIAS

PG

SS

12V

MODE

C1

10μF

R3

165kΩ

C5

1μF

C3

12nF

C4

1μF

L1

6.5μH

C2

22μF×2

R1

1MΩ

R2

324kΩ

EN

PG

3.3V/1A

MODE

BIAS