MAX1718 Maxim, MAX1718 Datasheet - Page 8

• Manufacturer Part Number: MAX1718
• Description: Notebook CPU Step-Down Controller for Intel Mobile Voltage Positioning IMVP-II
• Manufacturer: Maxim

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