MAX8654 datasheet(6/17 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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Typical Operating Characteristics (continued)

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

12V, 8A 1.2MHz

Step-Down Regulator

6

_______________________________________________________________________________________

EXPOSED PAD TEMPERATURE

vs. LOAD CURRENT

LOAD CURRENT (A)

-40

60

40

20

0

-20

120

100

80

140

-60

02

4

6

8

TA = +85

°C, NO AIR FLOW

TA = +25

°C, NO AIR FLOW

TA = -40

°C, NO AIR FLOW

TA = -40

°C, 200LFM

TA = +25

°C, 200LFM

TA = +85

°C, 200LFM

LINE REGULATION

INPUT VOLTAGE (V)

-0.3

-0.1

-0.2

0.1

0

0.2

-0.4

57

9

11

13

15

ILOAD = 6A

ILOAD = 0A

ILOAD = 3A

SHORT-CIRCUIT RESPONSE

MAX8654 toc12

400

µs/div

IOUT

VOUT

IIN

5A/div

2V/div

0V

0

1A/div

0

CSS = 1000pF

RMS INPUT CURRENT DURING

OUTPUT SHORT CIRCUIT

INPUT VOLTAGE (V)

0.05

0.30

0.25

0.20

0.15

0.10

0.45

0.40

0.35

0.50

0

57

9

11

13

VOUT = 3.3V

CSS = 1000pF

CSS = 22,000pF

CSS = 10,000pF

RMS OUTPUT CURRENT DURING

OUTPUT SHORT CIRCUIT

INPUT VOLTAGE (V)

2.5

2.0

1.5

3.5

3.0

4.0

1.0

57

9

11

13

VOUT = 3.3V

CSS = 1000pF

CSS = 22,000pF

CSS = 10,000pF

OPEN-LOOP FREQUENCY RESPONSE

FREQUENCY (kHz)

IOUT = 6A

106.57946kHz

CPI

106.57946kHz

CPI

-20

0

20

40

-40

10

1

0.1

1000

100

-83.3

83.3

166.6

-166.6

10

1

0.1

1000

100

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