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
LOAD-TRANSIENT RESPONSE
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
LOAD-TRANSIENT RESPONSE
(SKIP MODE)
(PWM MODE)
MAX1718 toc08b
MAX1718 toc08a
40
35
30
25
20
15
10
5
A
A
I + I
CC DD
I+
B
0A
B
0A
0
40µs/div
40µs/div
5
10
15
INPUT VOLTAGE (V)
20
25
A = V , 50mV/div, AC-COUPLED
OUT
B = INDUCTOR CURRENT, 10A/div
A = V , 50mV/div, AC-COUPLED
OUT
B = INDUCTOR CURRENT, 10A/div
STARTUP WAVEFORM
STARTUP WAVEFORM
(PWM MODE, NO LOAD)
DYNAMIC OUTPUT VOLTAGE TRANSITION
(PWM MODE, I
= 12A)
(PWM MODE)
OUT
MAX1718 toc09
MAX1718 toc10
MAX1718 toc11
A
A
B
A
OA
B
OA
B
0A
C
C
C
D
100µs/div
100µs/div
40µs/div
V
OUT
= 1.15V TO 1.25V
OUT
= 3A, R
A = V , 1V/div
A = V , 1V/div
OUT
OUT
I
= 62kΩ
TIME
B = INDUCTOR CURRENT, 10A/div
B = INDUCTOR CURRENT, 10A/div
C = SKP/SDN, 5V/div
C = SKP/SDN, 5V/div
A = V , 100mV/div, AC-COUPLED
OUT
B = INDUCTOR CURRENT, 10A/div
C = VGATE, 5V/div
D = ZMODE, 5V/div
_______________________________________________________________________________________
7
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
