MAX8654 datasheet(5/17 Pages) MAXIM

Part #	MAX8654

Description	12V, 8A 1.2MHz Step-Down Regulator Operates from 4.5V to 14V Supply

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Manufacturer	MAXIM [Maxim Integrated Products]

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12V, 8A 1.2MHz

Step-Down Regulator

_______________________________________________________________________________________

5

EFFICIENCY vs. LOAD CURRENT

OUTPUT CURRENT (A)

1

10

20

30

40

50

60

70

80

90

100

0

0.1

10

VIN = 12V, VVDL = VVP = 5V, fS = 500kHz

VOUT = 1.8V

VOUT = 3.3V

VOUT = 5V

EFFICIENCY vs. LOAD CURRENT

OUTPUT CURRENT (A)

1

10

20

30

40

50

60

70

80

90

100

0

0.1

10

VIN = VVP = 5V, fS = 500kHz

VOUT = 1.8V

VOUT = 3.3V

EFFICIENCY vs. LOAD CURRENT

OUTPUT CURRENT (A)

1

10

20

30

40

50

60

70

80

90

100

0

0.1

10

VIN = VVP = 12V, fS = 500kHz

VOUT = 1.8V

VOUT = 3.3V

VOUT = 5V

REFERENCE VOLTAGE vs. TEMPERATURE

TEMPERATURE (

°C)

0.595

0.600

0.605

0.610

0.590

-50

-25

0

25

50

75

100

125

SWITCHING FREQUENCY

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

200

600

400

1000

800

1200

0

57

9

11

13

15

SWITCHING FREQUENCY vs. RFREQ

RFREQ (k

Ω)

200

800

600

400

1200

1000

1400

0

50

100

150

200

250

LOAD REGULATION

LOAD CURRENT (A)

-0.30

-0.15

-0.20

-0.25

-0.05

-0.10

0

-0.35

01

2

3

4

5

6

7

8

VOUT = 1.8V

VOUT = 3.3V

SHUTDOWN SUPPLY CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

1

6

5

4

3

2

9

8

7

10

0

02

46

8

10

12

14

CURRENT LIMIT vs. OUTPUT VOLTAGE

OUTPUT VOLTAGE (V)

7.2

8.2

8.0

7.8

7.6

7.4

8.8

8.6

8.4

9.0

7.0

1.5

.2.0

2.5

3.0

3.5

Typical Operating Characteristics

(Typical values are: VIN = VVP = 12V, VOUT = 3.3V, RFREQ = 100kΩ, and TA = +25°C, circuit of Figure 1.)

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