Rainbow Electronics MAX1718 - Manual (Page 4)

MAX1718
Notebook CPU Step-Down Controller for Intel
Mobile Voltage Positioning (IMVP-II)
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ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = 15V, V CC = V DD = SKP/SDN = 5V, V OUT = 1.25V, T A = -40°C to +85°C, unless otherwise noted.) (Note 2)
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, V CC = V DD = SKP/SDN = 5V, V OUT = 1.25V, T A = 0°C to +85°C, unless otherwise noted.)
-8 +8
-2.0 +2.0
-1.5 +1.5
MIN TYP MAX
-12 +12
-12 +12
230 290
165 215
320 390
465 565 TON = V CC (200kHz)
TON = open (300kHz)
TON = REF (550kHz)
V+ = 12V, FB = 1.2V
On-Time (Note 1)
V+ = 5V, FB = 1.2V, TON = GND (1000kHz)
38kHz nominal, R TIME = 470k Ω
380kHz nominal, R
TIME
= 47k Ω
150kHz nominal, R TIME = 120k Ω
TIME Frequency Accuracy
DAC codes from 0.6V to 0.875V
DAC codes from 0.9V to 1.75V V+ = 4.5V to 28V,
includes load
regulation error
CONDITIONS
DC Output Voltage Accuracy
PARAMETER UNITS
%
%
ns
PWM CONTROLLER
V SKP/SDN Float Level I SKP/SDN = 0µA 1.8 2.2
PARAMETER CONDITIONS MIN TYP MAX UNITS
A 1.6 DL forced to 2.5V DL Gate-Driver Source Current
D0–D4 Pullup/Pulldown Entering impedance mode
Pullup
Pulldown
40
8
k Ω
µA
-1 +1
-1 +1
D0–D4, ZMODE = GND
ZMODE, SUS, OVP
Logic Input Current
4 Level Input Logic Levels
(TON, S0, S1)
For high
For open
For REF
For low
V CC - 0.4
3.15 3.85
1.65 2.35
0.5
V
µA -3 +3 SKP/SDN, S0, S1, TON forced to GND or V CC
SKP/SDN, S0, S1, and TON Input
Current
SKP/SDN Input Levels
SKP/SDN = logic high (SKIP mode)
SKP/SDN = open (PWM mode)
SKP/SDN = logic low (shutdown mode)
To enable no-fault mode
V
12 15
0.5
1.4 2.2
2.8 6
k Ω 95
D0–D4, 0 to 0.4V or 2.6V to 5.5V applied through resistor,
ZMODE = V
CC
DAC B-Mode Programming
Resistor, High
k Ω 1.05
D0–D4, 0 to 0.4V or 2.6V to 5.5V applied through resistor,
ZMODE = V
CC
DAC B-Mode Programming
Resistor, Low
V 0.8 D0–D4, ZMODE, SUS, OVP Logic Input Low Voltage
V 2.4 D0–D4, ZMODE, SUS, OVP Logic Input High Voltage
26 DH rising
ns
35 DL rising
Dead Time
LOGIC AND I/O