ADP3155 Analog Devices, ADP3155 Datasheet - Page 5

• Manufacturer Part Number: ADP3155
• Description: 5-Bit Programmable Triple Power Supply Controller for Pentium III Processors
• Manufacturer: Analog Devices

REV. A
Figure 7. Gate Switching Waveforms
1
2
Figure 4. Efficiency vs. Output
Current
100
DRIVE 1 AND 2 = 5V/DIV
95
90
85
80
75
70
65
Figure 10. Transient Response,
1 A–19 A of Figure 2 Circuit
1.4 2.8
OUTPUT VOLTAGE
20mV/DIV
OUTPUT CURRENT
1A TO 19A
4.2 5.6
OUTPUT CURRENT – Amps
V
V
OUT
OUT
DRIVER OUTPUT
DRIVER OUTPUT
SECONDARY
= 3.5V
= 1.3V
I
10 s/DIV
PRIMARY
OUT
N-DRIVE
N-DRIVE
7
= 10A
V
OUT
8.4
= 2.0V
SEE FIGURE 2
9.8 11.2 12.6
SEE FIGURE 2
V
OUT
= 2.8V
500ns/DIV
14
450
400
350
300
250
200
150
100
Figure 5. Frequency vs. Timing
Capacitor
3
4
50
Figure 11. Power-On Start-Up
Waveform
0
50
Figure 8. Driver Transition
Waveforms
Typical Performance Characteristics–
OUTPUT VOLTAGE
V
CC
REGULATOR
100
5V/DIV
VOLTAGE
1V/DIV
200 300 400 500 600 700
TIMING CAPACITOR – pF
100ns/DIV
10ms/DIV
–5–
SEE FIGURE 2
V
V
I
OUT
CC
IN
= +5V
= +12V
= 10A
800
45
40
35
30
25
20
15
10
Figure 9. Transient Response,
19 A–1 A of Figure 2 Circuit
25
20
15
10
Figure 6. Supply Current vs.
Operating Frequency
5
0
5
0
Figure 12. Output Accuracy
Distribution, V
45
T
SEE FIGURE 13
A
= +25 C
OPERATING FREQUENCY – kHz
OUTPUT VOLTAGE
20mV/DIV
58
OUTPUT ACCURACY – %
OUTPUT CURRENT
19A TO 1A
Q
10 s/DIV
GATE(TOTAL)
OUT
83
ADP3155
= 2.0 V
= 100nC
134
397