MPQ28164

High-Efficiency, Single-Inductor,

Buck-Boost Converter with 4.2A Switches

MPQ28164 Rev. 1.0

www.MonolithicPower.com

1

11/13/2018

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

© 2018 MPS. All Rights Reserved.

DESCRIPTION

The

MPQ28164

is

a

high-efficiency,

low-

quiescent current, buck-boost converter that

operates from an input voltage above, equal to,

or below the output voltage. The MPQ28164

provides

a

compact

solution

for

products

powered by one-cell Lithium-ion or multi-cell

alkaline batteries where the output voltage is

within the battery voltage range.

The MPQ28164 uses current-mode control with

a fixed PWM frequency for optimal stability and

transient response. The fixed 2MHz switching

frequency and integrated low RDS(ON) MOSFETs

minimize the solution footprint while maintaining

high efficiency.

To ensure the longest possible battery life, the

MPQ28164 uses an optional pulse-skipping

mode that reduces the switching frequency

under light-load conditions. For other low-noise

applications where pulse-skipping mode may

cause interference, a high-logic input on the

MODE/SYNC pin guarantees fixed-frequency

PWM operation under all load conditions.

The MPQ28164 operates with an input voltage

from 1.2V to 5.5V to provide an adjustable

output voltage from 1.5V to 5V. With an input

from 2.5V to 5.5V, the device can supply 2A of

current to the load with a 3.3V output voltage.

The MPQ28164 is available in a small QFN-11

(2mmx3mm) package.

FEATURES

 1.8V Minimum Start-Up Input Voltage

 1.2V to 5.5V Input Work Range

 1.5V to 5V Output Range

 4.2A Switching Current Limit

 3.3V/2A Load Capability from a 2.5V to 5.5V

Input Supply

 2MHz Fixed or External Synchronous

Switching Frequency

 Selectable PSM and PWM Mode

 Typical 25μA Quiescent Current

 High Efficiency up to 95%

 Load Disconnect during Shutdown

 Internal Soft Start (SS) and Compensation

 Power Good Indicator

 Hiccup Mode for Short-Circuit Protection

(SCP)

 Over-Temperature Protection (OTP)

 Available in a Small QFN-11 (2mmx3mm)

Package

APPLICATIONS

 Battery-Powered Devices

 Portable Instruments

 Tablet PCs

 Super-Cap Chargers

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”, the MPS logo, and “Simple, Easy Solutions” are

trademarks of Monolithic Power Systems, Inc. or its subsidiaries.

TYPICAL APPLICATION

SW1

SW2

L1 1µH

VIN

VCC

EN

MODE/SYNC

VOUT

FB

PG

AGND

PGND

C1

22µF

VIN

C3

1µF

C2

22µFx2

VOUT=3.3V

R1

560kΩ

R2

100kΩ