MIC2225-GFYMT datasheet(6/15 Pages) MICREL

Part #	MIC2225-GFYMT

Description	2MHz 600mA Synchronous Buck Regulator with 300mA LDO

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Manufacturer	MICREL [Micrel Semiconductor]

Direct Link	http://www.micrel.com

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6 / 15 page

Micrel, Inc.

MIC2225

February 2008

6

M9999-022008-D

Typical Characteristics (DC-DC)

0

10

20

30

40

50

60

70

80

90

100

0

0.1 0.2 0.3

0.4 0.5 0.6

LOAD CURRENT (A)

1.2V Efficiency @ –40°C

2.7VIN

5.5VIN

3.6VIN

0

10

20

30

40

50

60

70

80

90

100

0

0.1 0.2 0.3

0.4 0.5 0.6

LOAD CURRENT (A)

1.2V Efficiency @ 25°C

2.7VIN

5.5VIN

3.6VIN

0

10

20

30

40

50

60

70

80

90

100

0

0.1 0.2 0.3 0.4 0.5 0.6

LOAD CURRENT (A)

1.2V Efficiency @ 70°C

2.7VIN

5.5VIN

3.6VIN

0

25

50

75

100

125

150

2.5

3

3.5

4

4.5

5

5.5

INPUT VOLTAGE (V)

Quiescent Current

vs. Input Voltage

VOUT = 1.2V

LOAD = 0

ENLDO = 0V

EN = VIN

0

200

400

600

800

1000

1200

Quiescent Current

vs. Load Current

VOUT = 1.2V

EN = VIN

ENLDO = 0V

40

60

LOAD CURRENT (mA)

30

50

0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

2.5

3

3.5

4

4.5

5

5.5

INPUT VOLTAGE (V)

Enable Threshold

vs. Input Voltage

VOUT = 1.19V

ENLDO = 5V

0

10

20

30

40

50

60

70

80

90

100

2.5

3

3.5

4

4.5

5

5.5

INPUT VOLTAGE (V)

Turn-On Time

vs. Input Voltage

VOUT = 1.19V

VLDO = 2.8V

ENLDO = 5V

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

2.5

3

3.5

4

4.5

5

5.5

INPUT VOLTAGE (V)

Peak Current Limit

vs. Input Voltage

VOUT = 1.2V

EN = ENLDO = VIN

1.5

1.7

1.9

2.1

2.3

2.5

2.7

2.9

2.5

3

3.5

4

4.5

5

5.5

INPUT VOLTAGE (V)

Frequency

vs. Input Voltage

VOUT = 1.2V

LOAD = 0

ENLDO = VIN

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