MP28248 – 3A, 4.2V-20V INPUT, FAST-TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER IN QFN12 (2X3mm)

MP28248 Rev 1.0

www.MonolithicPower.com

7

1/5/2012

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© 2012 MPS. All Rights Reserved.

TYPICAL PERFORMANCE CHARACTERISTICS

40

50

60

70

80

90

100

0.01

0.1

1

10

OUTPUT CURRENT(A)

Efficiency vs. Load Current

Vo=1.2V

Vin=20V

Vin=12V

Vin=5V

0

200

400

600

800

1000

1200

0

0.5

1

1.5

2

2.5

3

OUTPUT CURRENT(A)

Power Loss vs. Load Current

Vo=1.2V

Vin=20V

Vin=12V

Vin=5V

70

75

80

85

90

95

100

0.01

0.1

1

10

OUTPUT CURRENT(A)

Vin=8V

Vin=20V

Vin=12V

Efficiency vs. Load Current

0

200

400

600

800

1000

1200

1400

1600

0

0.5

1

1.5

2

2.5

3

OUTPUT CURRENT(A)

Vin=20V

Vin=12V

Vin=8V

Power Loss vs. Load Current

OUTPUT CURRENT(A)

-1.2

-1

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

4

8

12

16

20

INPUT VOLTAGE(V)

No Load

Half Load

Full Load

Line Regulation

Vo=1.2V

1.164

1.166

1.168

1.17

1.172

1.174

1.176

1.178

1.18

1.182

1.184

1.186

510

15

INPUT VOLTAGE(V)

Half Load

Full Load

No Load

Vo vs. Vin

Vo=1.2V

-1.5

-1

-0.5

0

0.5

1

1.5

0

0.5

1

1.5

2

2.5

3

Vin=20V

Vin=12V

Vin=5V

Load Regulation

Vo=1.2V

Case Temperature Rise vs.

Output Current

0

5

10

15

20

25

0

0.5

1

1.5

2

2.5

3

OUTPUT CURRENT(A)

Vin=20V

Vin=12V

Vo=1.2V

Vo vs. Io

1.16

1.165

1.17

1.175

1.18

1.185

1.19

1.195

0

0.5

1

1.5

2

2.5

3

OUTPUT CURRENT(A)

Vo=1.2V

Vin=20V

Vin=12V

Vin=5V