Dynamically Adjustable, Synchronous
Step-Down Controller for Notebook CPUs
MAX1717
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = +15V, V
CC
= V
DD
= SKP/SDN = +5V, V
OUT
= 1.6V,
T
A
= 0°C to +85°C,
unless otherwise noted.)
PARAMETER
DL Gate-Driver Source Current
Dead Time
LOGIC AND I/O
Logic Input High Voltage
Logic Input Low Voltage
DAC B-Mode Programming
Resistor, Low
DAC B-Mode Programming
Resistor, High
D0–D4 Pull Up/Down
Logic Input Current
D0–D4, A/B
D0–D4, A/B
D0–D4, 0 to 0.4V or 2.6V to 5.5V applied through resistor,
A/B = GND
D0–D4, 0 to 0.4V or 2.6V to 5.5V applied through resistor,
A/B = GND
Entering B mode
D0–D4, A/B = 5V
A/B
For TON = V
CC
(200kHz operation)
TON Input Levels
For TON = open (300kHz operation)
For TON = REF (550kHz operation)
For TON = GND (1000kHz operation)
SKP/SDN and TON Input Current
SKP/SDN, TON forced to GND or V
CC
SKP/SDN = logic high (SKIP mode)
SKP/SDN = open (PWM mode)
SKP/SDN = logic low (shutdown mode)
To enable no-fault mode
-3
2.8
1.8
12
Pull up
Pull down
-1
-1
V
CC
- 0.4
3.15
1.65
3.85
2.35
0.5
3
6
2.2
0.5
15
µA
V
95
40
8
1
1
1.05
kΩ
kΩ
µA
2.4
DL forced to 2.5V
DL rising
DH rising
CONDITIONS
MIN
TYP
1.3
35
26
MAX
UNITS
A
ns
SKP/SDN Input Levels
V
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = +15V, V
CC
= V
DD
= SKP/SDN = +5V, V
OUT
= 1.6V,
T
A
= -40°C to +85°C,
unless otherwise noted.) (Note 3)
PARAMETER
DC Output Voltage Accuracy
(Note 1)
V+ = 4.5V to 28V,
includes load
regulation error
CONDITIONS
DAC codes from 1.3V to 2V
DAC codes from 0.925V to 1.275V
MIN
-1.5
-1.7
-8
-12
-12
375
136
260
365
TYP
MAX
1.5
%
1.7
+8
+12
+12
475
173
318
471
500
375
ns
ns
ns
ns
%
UNITS
150kHz nominal, R
TIME
= 120kΩ
TIME Frequency Accuracy
On-Time (Note 2)
On-Time (Note 2)
Minimum Off-Time (Note 2)
Minimum Off-Time (Note 2)
4
380kHz nominal, R
TIME
= 47kΩ
38kHz nominal, R
TIME
= 470kΩ
V+ = 5V, FB = 2V, TON = GND (1000kHz)
TON = REF (550kHz)
V+ = 24V, FB = 2V
TON = open (300kHz)
TON = V
CC
(200kHz)
TON = V
CC
, open, or REF (200kHz, 300kHz, or 550kHz)
TON = GND (1000kHz)
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
