ADP3154JRU datasheet(5/12 Pages) AD

Part #	ADP3154JRU

Description	5-Bit Programmable Dual Power Supply Controller for Pentium III Processors

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REV. A

ADP3154

–5–

OUTPUT CURRENT – Amps

100

65

1.4

2.8

14

4.2

5.6

7

9.8 11.2 12.6

8.4

95

85

80

75

70

90

VOUT = 2.0V

VOUT = 2.8V

VOUT = 3.5V

SEE FIGURE 2

VOUT = 1.3V

Figure 4. Efficiency vs. Output

Current

IOUT = 10A

2

500ns/DIV

1

PRIMARY

N-DRIVE

DRIVER OUTPUT

SECONDARY

N-DRIVE

DRIVER OUTPUT

DRIVE 1 AND 2 = 5V/DIV

SEE FIGURE 2

Figure 7. Gate Switching Waveforms

OUTPUT CURRENT

1A TO 19A

OUTPUT VOLTAGE

20mV/DIV

10 s/DIV

Figure 10. Load Transient Response,

1 A–19 A of Figure 2 Circuit

TIMING CAPACITOR – pF

50

100

800

200

300

400

500

600

700

450

400

0

200

150

100

50

350

250

300

Figure 5. Frequency vs. Timing

Capacitor

100ns/DIV

SEE FIGURE 2

VCC = +12V

VIN = +5V

IOUT = 10A

Figure 8. Driver Transition

Waveforms

3

4

10ms/DIV

REGULATOR

OUTPUT VOLTAGE

1V/DIV

VCC VOLTAGE

5V/DIV

Figure 11. Power-On Start-Up

Waveform

OPERATING FREQUENCY – kHz

45

397

58

83

134

45

40

0

20

15

10

5

35

25

30

QGATE(TOTAL) = 100nC

Figure 6. Supply Current vs.

Operating Frequency

10 s/DIV

OUTPUT CURRENT

19A TO 1A

OUTPUT VOLTAGE

20mV/DIV

Figure 9. Load Transient Response,

19 A–1 A of Figure 2 Circuit

OUTPUT ACCURACY – %

15

0

25

20

10

5

TA = +25 C

SEE FIGURE 13

Figure 12. Output Accuracy

Distribution, VOUT = 2.0 V

Typical Performance Characteristics–

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