Notebook CPU Step-Down Controller for Intel
-
Mobile Voltage Positioning (IMVP II)
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V+ = 12V, V = V = SKP/SDN = 5V, V
= 1.25V, T = +25°C, unless otherwise noted.)
A
DD
CC
OUT
SHUTDOWN WAVEFORM
(PWM MODE, NO LOAD)
SHUTDOWN WAVEFORM
(PWM MODE, I = 12A)
DYNAMIC OUTPUT VOLTAGE TRANSITION
(PWM MODE)
OUT
MAX1718 toc13
MAX1718 toc14
MAX1718 toc12
A
B
A
B
A
0A
0A
B
0A
C
C
D
C
100µs/div
100µs/div
40µs/div
A = V , 1V/div
A = V , 1V/div
V
OUT
= 0.7V TO 1.25V
OUT
OUT
OUT
= 3A, R
B = INDUCTOR CURRENT, 10A/div
B = INDUCTOR CURRENT, 10A/div
I
= 62kΩ
TIME
C = SKP/SDN, 5V/div
C = SKP/SDN, 5V/div
A = V , 500mV/div, AC-COUPLED
OUT
B = INDUCTOR CURRENT, 10A/div
C = VGATE, 5V/div
D = SUS, 5V/div
OFFSET FUNCTION SCALE FACTOR
vs. DAC SETTING
OUTPUT VOLTAGE
vs. POS-NEG DIFFERENTIAL
0.925
0.900
0.875
0.850
0.825
0.800
0.775
0.750
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
MEASURED
THEORETICAL
0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9
DAC SETTING (V)
-300
-200
-100
0
100
200
POS-NEG (mV)
8
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
