MIC261203 datasheet(6/31 Pages) MICREL

Part #	MIC261203

Description	28V, 12A Hyper Light Load??Synchronous DC/DC Buck Regulator

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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6 / 31 page

Micrel, Inc.

MIC261203

July 2011

6

M9999-071311-A

Typical Characteristics

VIN Operating Supply Current

vs. Input Voltage

0.0

0.2

0.4

0.6

0.8

1.0

4

1016

2228

VIN Shutdown Current

vs. Input Voltage

0

15

30

45

60

4

1016

2228

VDD Output Voltage

vs. Input Voltage

0

2

4

6

8

10

410

16

22

INPUT VOLTAGE (V)

VEN = 0V

REN = Open

INPUT VOLTAGE (V)

VOUT = 1.8V

IOUT = 0A

SWITCHING

28

VFB = 0.9V

IDD = 10mA

Feedback Voltage

vs. Input Voltage

0.792

0.796

0.800

0.804

0.808

4

1016

2228

Total Regulation

vs. Input Voltage

-1.0%

-0.5%

0.0%

0.5%

1.0%

4

1016

2228

Current Limit

vs. Input Voltage

0

5

10

15

20

25

30

4

1016

222

INPUT VOLTAGE (V)

VOUT = 1.8V

IOUT = 3A to 12A

VOUT = 1.8V

IOUT = 3A

8

VOUT = 1.8V

Switching Frequency

vs. Input Voltage

500

550

600

650

700

4

1016

2228

Enable Input Current

vs. Input Voltage

0

4

8

12

16

4

1016

2228

PG/VREF Ratio

vs. Input Voltage

80%

85%

90%

95%

100%

4

1016222

INPUT VOLTAGE (V)

VEN = VIN

INPUT VOLTAGE (V)

VOUT = 1.8V

IOUT = 3A

8

VREF = 0.7V

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