Notebook CPU Step-Down Controller for Intel
-
Mobile Voltage Positioning (IMVP II)
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, V
= V
= SKP/SDN = 5V, V
= 1.25V, T = -40°C to +85°C, unless otherwise noted.) (Note 2)
OUT A
CC
DD
PARAMETER
LOGIC AND I/O
CONDITIONS
MIN
TYP
MAX UNITS
Logic Input High Voltage
Logic Input Low Voltage
2.4
V
D0–D4, ZMODE, SUS, OVP
D0–D4, ZMODE, SUS, OVP
0.8
V
DAC B-Mode Programming
Resistor, Low
D0–D4, 0 to 0.4V or 2.6V to 5.5V applied through resistor,
1.05
kΩ
ZMODE = V
CC
DAC B-Mode Programming
Resistor, High
D0–D4, 0 to 0.4V or 2.6V to 5.5V applied through resistor,
ZMODE = V
95
kΩ
CC
Note 1: On-Time specifications are measured from 50% to 50% at the DH pin, with LX forced to 0V, BST forced to 5V, and a 500pF
capacitor from DH to LX to simulate external MOSFET gate capacitance. Actual in-circuit times may be different due to
MOSFET switching speeds.
Note 2: Specifications to T = -40°C are guaranteed by design and not production tested.
A
Typical Operating Characteristics
(Circuit of Figure 1, V+ = 12V, V = V = SKP/SDN = 5V, V
= 1.25V, T = +25°C, unless otherwise noted.)
A
DD
CC
OUT
EFFICIENCY vs. LOAD CURRENT
300kHz VOLTAGE POSITIONED
FREQUENCY vs. LOAD CURRENT
400
300
200
100
0
FREQUENCY vs. INPUT VOLTAGE
95
90
85
80
75
70
65
60
55
50-
350
340
330
320
310
300
290
280
270
260
250
SKIP MODE
V+ = 7V
PWM MODE
SKIP MODE
I
= 18A
= 3A
OUT
PWM MODE
SKIP MODE
V+ = 7V
V+ = 12V
PWM MODE
SKIP MODE
V+ = 12V
I
OUT
V+ = 20V
PWM MODE
V+ = 20V
0
5
10
15
20
0.01
0.1
1
10
100
LOAD CURRENT (A)
7.0
10.4
13.8
17.2
20.6
24.0
LOAD CURRENT (A)
INPUT VOLTAGE (V)
OUTPUT CURRENT AT CURRENT LIMIT
vs. TEMPERATURE
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
FREQUENCY vs. TEMPERATURE
326.0
1000
900
800
700
600
500
400
300
200
100
0
50
I
= 19A
OUT
I + I
CC DD
325.5
325.0
324.5
324.0
323.5
323.0
45
40
35
30
25
20
I+
-40
-15
10
35
60
85
-40
-15
10
35
60
85
5
10
15
20
25
TEMPERATURE (°C)
TEMPERATURE (°C)
INPUT VOLTAGE (V)
6
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
