MP28300

2V-5.5V Input, 100mA LDO in 2x2 QFN

MP28300 Rev.1.01

www.MonolithicPower.com

1

6/6/2017

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

© 2017 MPS. All Rights Reserved.

DESCRIPTION

The

MP28300

is

a

monolithic

power-

management unit containing 300mA, high-

efficiency, step-down, switching converters and

a

100mA

LDO

regulator.

The

nanoamp

quiescent

current

provides

extremely

high

efficiency when the load current is down in the

µA range. With minimum input voltage as low

as 2V, the MP28300 allows the system to

operate directly from the battery.

The constant-on-time control scheme provides

fast

transient

response,

high

light-load

efficiency, and requires minimal capacitance.

The regulation can be made tight by integrating

an error amplifier to correct the output voltage.

An 100mA LDO regulator provides easy system

configuration with clean output voltage.

The CTRL pins control the on/off and output

voltage selection functions.

Fault protection features include under-voltage

lockout (UVLO), over-current protection (OCP),

and thermal shutdown.

The MP28300 requires a minimal number of

readily

available,

standard,

external

components and is available in a small QFN-12

(2mmx2mm) package.

FEATURES

 300mA Buck Switcher

o

o

Wide 2.0V to 5.5V Operating Input

Range

o

7 Selectable Output Voltages

o

Up to 300mA Output Current

o

1.5MHz

Switching

Frequency

in

Continuous Conduction Mode (CCM)

o

100% Duty Cycle in Dropout

o

0.25

Ω

and

0.25

Ω

Internal

Power

MOSFET Switches

o

Cycle-by-Cycle Over-Current Protection

(OCP)

o

Short-Circuit

Protection

(SCP)

with

Hiccup Mode

 100mA LDO

o

o

2.0V to 5.5V Operating Input Range

o

3 Selectable Output Voltages

o

Over-Temperature Protection (OTP)

 Available

in

a

QFN-12

(2mmx2mm)

Package

APPLICATIONS

 Wearables

 IOT

 Portable Instruments

 Battery-Powered Devices

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

MP28300GG

VIN1

CTRL2

CTRL1

OUT1

GND

PG1

C2

10µF

C1

10µF

SW1

L1

2.2µH

VIN1:

3.6V

VOUT1

1.8V/300mA

CTRL5

OUT2

VIN2

C4

1µF

VIN2:

3.6V

C3

1µF

VOUT2

1.8V/100mA

CTRL3

CTRL4