MP28254 datasheet(5/14 Pages) MPS

5 / 14 page

MP28254 – SYNCHRONOUS STEP-DOWN CONVERTER WITH INTERNAL MOSFETS

MP28254 Rev. 1.01

www.MonolithicPower.com

5/15/2012

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

TYPICAL PERFORMANCE CHARACTERISTICS

VIN = 12V, VOUT = 1.2V, L = 1.8µH, TA = +25ºC, unless otherwise noted.

VCC Regulator Line Regulation

Load Regulation

Line Regulation

Operating Range

Peak Current vs. Duty Cycle

INPUT VOLTAGE (V)

500

550

600

650

700

750

800

850

900

950

1000

-0.2

-0.15

-0.1

-0.05

0.05

0.1

0.15

0.2

3.5

4.5

5.5

5.2

5.4

5.6

5.8

6.2

6.4

6.6

6.8

0 102030405060708090 100

DUTY CYCLE (% )

0.1

100

INPUT VOLTAGE (V)

-0.5

-0.4

-0.3

-0.2

-0.1

0.1

0.2

0.3

0.4

0.5

01234

LOAD CURRENT(A)

OUTPUT CURRENT(A)

VIN=4.5V

VIN=12V

VIN=21V

-2

-1

Case Temperature vs.

Output Current

ENABLED SUPPLY CURRENT

vs. INPUT VOLTAGE

VFB=1V

DISABLED SUPPLY CURRENT

vs. INPUT VOLTAGE

VEN=0V

Dmax Limit

Minimum on time Limit

IOUT=0A

IOUT=2A

IOUT=4A

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