MP2358

2A, 23V, 370KHz

Step-Down Converter

MP2358 Rev. 1.3

www.MonolithicPower.com

1

3/23/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

The Future of Analog IC Technology

TM

TM

DESCRIPTION

The MP2358 is a monolithic step-down switch

mode converter with a built-in internal power

MOSFET. It achieves 2A continuous output

current over a wide input supply range with

excellent load and line regulation.

Current mode operation provides fast transient

response and eases loop stabilization.

Fault condition protection includes cycle-by-cycle

current limiting and thermal shutdown. In

shutdown mode the regulator draws 23µA of

supply

current.

Programmable

soft-start

minimizes the inrush supply current and the

output overshoot at initial startup.

The MP2358 requires a minimum number of

readily available standard external components.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV2358DS-00A

2.3” x 1.4” x 0.5”

EV2358DQ-00A

2.0” x 1.3” x 0.4”

FEATURES

• 2A Output Current with QFN Package

• 0.18Ω Internal Power MOSFET Switch

• Stable with Low ESR Output Ceramic

Capacitors

• 93% Efficiency

• 23µA Shutdown Mode

• Fixed 370KHz Frequency

• Thermal Shutdown

• Cycle-by-Cycle Over Current Protection

• Wide 4.75V to 23V Operating Input Range

• Output Adjustable from 0.92V to 16V

• Programmable Under Voltage Lockout

• Available in QFN10 (3mm x 3mm) and SO8

Packages

APPLICATIONS

• Distributed Power Systems

• Battery Charger

• Pre-Regulator for Linear Regulators

“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION

MP2358

SW

IN

BS

FB

SS

COMP

GND

EN

3.3V/2A

INPUT

4.75V - 23V

MP2358_TAC_S01

OPEN = AUTOMATIC

STARTUP

C5

10nF

C3

3.9nF

C4

10nF

D1

B220A

C6

OPEN

95

90

85

80

75

70

65

60

OUTPUT CURRENT (A)

MP2358_EC01

Efficiency vs

Output Current

0

1.0

0.5

1.5

2.0

2.5

5.0V

3.3V

2.5V