MP28258 – 3A, 4.2V-20V INPUT, FAST TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER IN QFN12 (2X3mm)

MP28258 Rev 1.14

www.MonolithicPower.com

16

9/25/2012

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

© 2012 MPS. All Rights Reserved.

TYPICAL APPLICATION SCHEMATIC

VIN

C1A

TBD

25V

L1

TBD

C7

1nF

R10

100k

R5

499k

R7

TBD

9

R3

0

R1

TBD

R2

TBD

EN

PG

GND

VOUT

IN

FREQ

VCC

EN

PG

FB

SW

SW

BST

MP28258

8

4

11

1

6

5

2

10

7

12

3

Figure 13—Typical Application Schematic with No External Ramp

VIN

C1A

TBD

25V

L1

TBD

C4

TBD

C7

1nF

R10

100k

R5

499k

R7

TBD

9

R3

0

R1

TBD

R9

0

R2

TBD

C2E

NS

R4

TBD

EN

PG

GND

VOUT

IN

FREQ

VCC

EN

PG

FB

SW

SW

BST

MP28258

8

4

11

1

6

5

2

10

7

12

3

Figure 14—Typical Application Schematic with Low ESR Ceramic Capacitor

VIN

C1A

TBD

25V

L1

TBD

C4

TBD

C7

1nF

R10

100k

R5

499k

R7

TBD

9

R3

0

Cdc

TBD

R1

TBD

R2

TBD

C2E

NS

R4

TBD

EN

PG

GND

VOUT

IN

FREQ

VCC

EN

PG

FB

SW

SW

BST

MP28258

8

4

11

1

6

5

2

10

7

12

3

Figure 15—Typical Application Schematic with Low ESR Ceramic Capacitor\

and DC Blocking Capacitor