MP2321

Constant-On-Time, Step-Down Converter

in a QFN (2mmx3mm) Package

MP2321 Rev. 1.0

www.MonolithicPower.com

1

10/26/2016

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

© 2016 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

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

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