MAX1545ETL datasheet(9/43 Pages) MAXIM

Part #	MAX1545ETL

Description	Dual-Phase, Quick-PWM Controllers for Programmable CPU Core Power Supplies

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Manufacturer	MAXIM [Maxim Integrated Products]

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Dual-Phase, Quick-PWM Controllers for

Programmable CPU Core Power Supplies

_______________________________________________________________________________________

9

OUTPUT VOLTAGE vs. LOAD CURRENT

(VOUT = 1.50V)

LOAD CURRENT (A)

40

50

30

10

20

1.40

1.42

1.44

1.46

1.48

1.50

1.52

1.38

060

100

90

80

70

60

50

0.1

1

10

100

EFFICIENCY vs. LOAD CURRENT

(VOUT = 1.50V)

LOAD CURRENT (A)

VIN = 20V

VIN = 12V

VIN = 8V

SKIP = REF

SKIP = VCC

OUTPUT VOLTAGE vs. LOAD CURRENT

(VOUT = 1.00V)

LOAD CURRENT (A)

50

10

30

20

40

0.92

0.94

0.96

0.98

1.00

1.02

0.90

060

Typical Operating Characteristics

(Circuit of Figure 1, VIN = 12V, VCC = VDD = 5V, SHDN = SKIP = VCC, D0–D4 set for 1.5V (SUS = GND), S0–S1 set

for 1V (SUS = VCC), OFS = GND, TA = +25°C, unless otherwise specified.)

100

90

80

50

0.1

10

100

70

60

LOAD CURRENT (A)

1

EFFICIENCY vs. LOAD CURRENT

(VOUT = 1.00V)

VIN = 20V

VIN = 12V

VIN = 8V

SKIP = REF

SKIP = VCC

OUTPUT VOLTAGE vs. LOAD CURRENT

(VOUT = 0.80V)

LOAD CURRENT (A)

30

SUS = VCC

10

20

0.74

0.76

0.78

0.80

0.82

0.72

040

100

90

80

50

0.1

10

100

70

60

LOAD CURRENT (A)

1

DUAL-PHASE EFFICIENCY vs. LOAD CURRENT

(VOUT = 0.80V)

VIN = 20V

VIN = 8V

VIN = 12V

SKIP = REF

100

90

80

50

0.1

10

100

70

60

LOAD CURRENT (A)

1

SINGLE-PHASE EFFICIENCY

vs. LOAD CURRENT

(VOUT = 0.80V)

VIN = 20V

VIN = 8V

VIN = 12V

SKIP = GND

SWITCHING FREQUENCY

vs. LOAD CURRENT

LOAD CURRENT (A)

30

10

20

100

200

300

400

0

040

VOUT = 1V (NO LOAD)

SKIP MODE (SKIP = REF)

FORCED-PWM (SKIP = VCC)

NO-LOAD SUPPLY CURRENT

vs. INPUT VOLTAGE (FORCED-PWM MODE)

INPUT VOLTAGE (V)

20

25

5

15

10

30

60

90

120

150

0

030

IIN

SKIP = VCC

ICC + IDD

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