MP2321

19V, 2A, 40µA IQ, High-Efficiency,

Constant-On-Time, Step-Down Converter

in a QFN (2mmx3mm) Package

MP2321 Rev. 1.1

www.MonolithicPower.com

1

5/24/2019

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

© 2019 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2321 is a fully-integrated, high-

efficiency, synchronous, step-down, switch-

mode converter with 40μA of quiescent current.

The MP2321 achieves 2A of continuous output

current over a wide input supply range with

excellent load and line regulation and can

operate with high efficiency over a wide output

current load range. The MP2321 is optimized

for

battery-operated

applications

and

applications requiring high light-load efficiency.

With constant-on-time (COT) control, the

MP2321 provides very fast transient response,

easy loop design, and very tight output

regulation.

Full protection features include short-circuit

protection (SCP), over-current protection (OCP),

under-voltage protection (UVP), and thermal

shutdown.

The MP2321 requires a minimal number of

readily

available,

standard,

external

components and is available in a space-saving

QFN-14 (2mmx3mm) package.

FEATURES

 4V to 19V Operating Input Range

 2A Output Current

 40μA Quiescent Current

 Output Adjustable from 0.6V

 110mΩ/40mΩ High-Side/Low-Side RDS(ON)

for Internal Power MOSFETs

 Power Good Indicator

 Programmable Soft-Start Time

 Forced PWM or Auto PFM/PWM Mode

Selectable

 Programmable Switching Frequency

 Thermal Shutdown

 Short-Circuit Protection: Hiccup Mode

 Available

in

a

QFN-14

(2mmx3mm)

Package

APPLICATIONS

 Tablet PCs

 Solid State Drives

 Gaming

 Battery-Operated Applications

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

0

10

20

30

40

50

60

70

80

90

100

0.001

0.01

0.1

1

10