MP2338

High-Efficiency, 28V, 3A, 450kHz,

Synchronous Step-Down Converter

In SOT583 Package

MP2338 Rev. 1.0

www.MonolithicPower.com

1

12/11/2020

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

© 2020 MPS. All Rights Reserved.

DESCRIPTION

The MP2338 is a fully integrated, high-

frequency, synchronous, rectified, step-down

switch-mode converter with internal power

MOSFETs. It offers a very compact solution to

achieve 3A of continuous output current across

a wide input range, with excellent load and line

regulation. The MP2338 has synchronous

mode operation for high efficiency across the

wide output current load range.

Constant-on-time (COT) control provides very

fast transient response and easy loop design,

as well as tight output regulation.

Full protection features include short-circuit

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

under-voltage protection (UVP), and thermal

shutdown.

The MP2338 requires a minimal number of

readily available, standard external components.

It is available in a space-saving SOT583

package.

FEATURES

 Wide 4.5V to 28V Operating Input Range

 Wide 0.5V to 16V VOUT

 ±1.5% Internal Reference Accuracy Over-

Temperature

 115mΩ/55mΩ Low RDS(ON) Internal Power

MOSFETs

 160µA Quiescent Current

 >90% Efficiency for 24V to 5V/3A Condition

 Power Save Mode at Light Load

 Fast Load Transient Response

 450kHz Switching Frequency

 tON Extension to Improve Dropout

 Configurable Soft-Start Time

 Power Good Indication

 Over-Current Protection (OCP) with Hiccup

Mode

 Thermal Shutdown Protection

 Available in an SOT583 Package

Optimized Performance with

MPS Inductor MPL-AL

Series

APPLICATIONS

 Game Consoles

 Multi-Function Printers

 Power Meters

 Flat Panel Televisions and Monitors

 General-Purpose Power Supplies

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

C3

0.1μF

MP2338

VIN

C1

22μF

VIN 6.5V to 28V

EN

On/Off

SS

C4

22nF

SW

BST

C2

22μF x 2

FB

R1

90.9kΩ

R2

10kΩ

PG

GND

VOUT

5V/3A

L1

6.8μH

R6

10kΩ

Efficiency

VOUT = 5V, L = 6.8µH, DCR = 16mΩ

40

50

60

70

80

90

100

0.001

0.01

0.1

1

10

LOAD CURRENT(A)

Vin=12V

Vin=19V

Vin=24V