MP2172C

5.5V, 2A, Sync Step-Down Converter

with Output Discharge

in UTQFN Package

MP2172C Rev.1.0

www.MonolithicPower.com

1

4/22/2019

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

© 2019 MPS. All Rights Reserved.

DESCRIPTION

The MP2172C is a monolithic, step-down,

switch-mode converter with built-in internal

power MOSFETs. It achieves 2A of continuous

output current from a 2.38V to 5.5V input

voltage range with excellent load and line

regulation. The output voltage can be regulated

as low as 0.6V.

The constant-on-time (COT) control scheme

provides fast transient response and eases loop

stabilization. Fault protections include cycle-by-

cycle current limiting and thermal shutdown.

The MP2172C is ideal for a wide range of

applications, including high-performance DSPs,

wireless power, portable and mobile devices,

and other low-power systems.

The MP2172C requires a minimal number of

readily available, standard external components,

and is available in ultra-small 1.2mmx1.6mm

UTQFN packages.

FEATURES

 Fixed-Frequency PWM Mode

 1.1MHz Switching Frequency

 EN for Power Sequencing

 1% FB Accuracy

 Wide 2.38V to 5.5V Operating Input Range

 Output Adjustable from 0.6V

 Up to 2A Output Current

 75mΩ and 45mΩ Internal Power MOSFET

Switches

 100% Duty On

 Output Discharge

 VOUT Over-Voltage Protection (OVP)

 Short-Circuit Protection (SCP) with Hiccup

Mode

 Available in a UTQFN (1.2mmx1.6mm)

Package

APPLICATIONS

 Wireless/Networking Cards

 Portable Instruments

 Battery-Powered Devices

 Low-Voltage I/O System Power

 Multi-Function Printers

 Solid-State Drives

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

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

TYPICAL APPLICATION

Efficiency vs. Output Current

VIN=5V, L=1μH (DCR=27mΩ)

0

10

20

30

40

50

60

70

80

90

100

00.5

11.5

2

Output Current (A)

Vin=5V,Vo=1.2V

Vin=5V,Vo=1.8V

Vin=5V,Vo=2.5V

Vin=5V,Vo=3.3V