ADP3152 View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADP3152

5-Bit Programmable Synchronous Switching Regulator Controller for Pentium® II Processor

Analog Devices 

100

SEE FIGURE 2

95

VOUT = +3.5V

90

85

VOUT = +2.0V

80

VOUT = +2.8V

75

70

65

1.4 2.8 4.2 5.6 7.0 8.4 9.8 11.2 12.6 14.0

OUTPUT CURRENT – Amps

Figure 4. Efficiency vs. Output Current

Typical Performance Characteristics–ADP3152

450

400

350

300

250

200

150

100

50

0

50 100 200 300 400 500 600 700 800

TIMING CAPACITOR – pF

Figure 5. Frequency vs. Timing

Capacitor

45

40

35

30

25

Qn + Qn = 100nC

20

15

10

5

0

45

58

83

134

397

OPERATING FREQUENCY – kHz

Figure 6. Gate Charge Supply Cur-

rent vs. Operating Frequency

SEE FIGURE 2

VOUT = +3.5V, IOUT = 10A

PRIMARY

N-DRIVE

DRIVER OUTPUT

1

SECONDARY

N-DRIVE

DRIVER OUTPUT

2

2

DRIVE 1 AND 2 = 5V/DIV

500ns/DIV

SEE FIGURE 2

100ns/DIV

OUTPUT VOLTAGE

20mV/DIV

OUTPUT CURRENT

14A TO 1A

10␮s/DIV

Figure 7. Gate Switching Waveforms Figure 8. Driver Transition Waveforms Figure 9. Transient Response, 14 A–1A

of Figure 2 Circuit

OUTPUT VOLTAGE

20mV/DIV

OUTPUT CURRENT

1A TO 14A

Figure 10. Transient Response,

1A–14 A of Figure 2 Circuit

VCC VOLTAGE

5V/DIV

3

REGULATOR

OUTPUT VOLTAGE

1V/DIV

4

10ms

Figure 11. Power-On Start-Up

Waveforms

25

TA = +25؇C

SEE FIGURE 13

20

15

10

5

0

OUTPUT ACCURACY – %

Figure 12. Output Accuracy

Distribution, VOUT = 2.8 V

REV. 0

–5–

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