MP2174C

2.7V-5.5V,4A, High-Efficiency,

Synchronous Step-Down

Converter with Forced CCM in 2×2mm QFN

MP2174C Rev. 1.0

www.MonolithicPower.com

1

8/7/2019

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

© 2019 MPS. All Rights Reserved.

DESCRIPTION

The MP2174C is a monolithic, step-down,

switch mode converter with built-in, internal

power MOSFETs. It achieves 4A of continuous

output current from a 2.7V to 5.5V input voltage

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 easy loop

stabilization.

Fault

condition

protections

include

cycle-by-cycle

current

limit

and

thermal

shutdown.

The MP2174C requires a minimal number of

readily

available,

standard

external

components, and is available in an ultra-small

QFN-12 (2mmx2mm) package.

The MP2174C is ideal for a wide range of

applications,

including

PDAs,

portable

instruments, DVD drives, and small handheld

devices.

FEATURES

 Forced PWM Mode Operation

 Wide 2.7V to 5.5V Operating Input Range

 Output Voltage as Low as 0.6V

 4A Output Current

 35mΩ and 18mΩ Internal Power MOSFET

 Peak Efficiency Above 96%

 1.1MHz Frequency

 100% Duty Cycle in Dropout

 0.5ms Internal Soft-Start Time

 EN and Power Good for Power Sequencing

 Auto-Discharge at Power-Off

 Short-Circuit Protection with Hiccup Mode

 Available in a QFN-12 (2mmx2mm)

Package

APPLICATIONS



Storage Drives



Portable/Handheld Devices

 Low-Voltage I/O System Power

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

L1

1µH

C2

22µF

C1

22µF

VOUT

1.2V/4A

VIN

EN

PG

MP2174C

EN

PG

PVIN

VIN

SW

OUT

FB

NC

AGND

PGND

R2

200k

R1

200k

Efficiency vs. Output Current

VIN = 5V, DCR = 27m

Ω

0

10

20

30

40

50

60

70

80

90

100

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

OUTPUT CURRENT (A)

Vout=1.2V

Vout=1.8V

Vout=2.5V

Vout=3.3V