MAX8551ETI datasheet(6/29 Pages) MAXIM

Part #	MAX8551ETI

Description	Integrated DDR Power-Supply Solutions for Desktops, Notebooks, and Graphic Cards

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Manufacturer	MAXIM [Maxim Integrated Products]

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Integrated DDR Power-Supply Solutions for

Desktops, Notebooks, and Graphic Cards

6

_______________________________________________________________________________________

Typical Operating Characteristics

(VVIN = 12V, VOUT = 2.5V, TON = GND, SKIP = AVDD, circuit of Figure 8, TA = +25°C, unless otherwise noted.)

EFFICIENCY vs. LOAD CURRENT

(TON = GND)

ILOAD (A)

10

1

0.1

60

70

80

90

100

50

10

20

30

40

0

0.01

100

fSW = 600kHz

VOUT = 2.5V

VOUT = 1.8V

VOUT = 1.5V

SKIP = GND

SKIP = AVDD

EFFICIENCY vs. LOAD CURRENT

(TON = OPEN)

ILOAD (A)

10

1

0.1

10

20

30

40

50

60

70

80

90

100

0

0.01

100

fSW = 300kHz

VOUT = 2.5V

VOUT = 1.8V

VOUT = 1.5V

SKIP = GND

SKIP = AVDD

SWITCHING FREQUENCY vs. LOAD CURRENT

(TON = GND)

ILOAD (A)

11

10

8

9

2

3

4

5

6

7

1

50

100

150

200

250

300

350

400

450

500

550

600

650

700

0

012

SKIP = GND

SKIP = AVDD

SWITCHING FREQUENCY vs. INPUT VOLTAGE

(TON = GND)

VIN (V)

26

24

20 22

8 10 12 14 16 18

6

420

440

460

480

500

540

520

560

580

600

620

640

660

680

700

400

428

ILOAD = 12A

ILOAD = 0A

SWITCHING FREQUENCY vs. TEMPERATURE

(TON = GND)

TEMPERATURE (

°C)

80

65

50

35

20

5

-10

-25

650

660

670

680

690

700

600

640

630

620

610

-40

ILOAD = 12A

OUTPUT VOLTAGE

vs. LOAD CURRENT

ILOAD (A)

12

10

6

8

4

2

2.495

2.500

2.505

2.510

2.515

2.520

2.525

2.530

2.535

2.540

2.490

014

VIN = 15V,

TON = GND

SKIP = GND

SKIP = AVDD

VTT VOLTAGE

vs. VTT CURRENT

IVTT (A)

2

1

-2

-1

0

1.21

1.22

1.23

1.24

1.25

1.26

1.27

1.28

1.20

-3

3

VTTR VOLTAGE

vs. VTTR CURRENT

IVTTR (mA)

10

5

-10

-5

0

1.21

1.22

1.23

1.24

1.25

1.26

1.27

1.28

1.20

-15

15

LINE REGULATION

(VOUT vs. VIN)

VIN (V)

26

24

20 22

8 10 12 14 16 18

6

2.46

2.47

2.48

2.49

2.50

2.51

2.52

2.53

2.54

2.55

2.45

428

ILOAD = 0A

ILOAD = 12A

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