High-Speed, Digitally Adjusted
Step-Down Controllers for Notebook CPUs
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
BATT
= 15V, V
CC
= V
DD
= 5V,
SKIP
= GND,
T
A
=
0°C to +85°C,
unless otherwise noted.)
PARAMETER
Overvoltage Trip Threshold
Overvoltage Fault Propagation
Delay
Output Undervoltage Protection
Threshold
Output Undervoltage Protection
Time
Current-Limit Threshold
(Positive Direction, Fixed)
Current-Limit Threshold
(Positive Direction, Adjustable)
Current-Limit Threshold
(Negative Direction)
Current-Limit Threshold
(Zero Crossing)
PGOOD Propagation Delay
PGOOD Output Low Voltage
PGOOD Leakage Current
Thermal Shutdown Threshold
V
CC
Undervoltage Lockout
Threshold
DH Gate-Driver On-Resistance
DL Gate-Driver On-Resistance
(Pull-Up)
DL Gate-Driver On-Resistance
(Pull-Down)
DH Gate-Driver Source/Sink
Current
DL Gate-Driver Sink Current
DL Gate-Driver Source Current
Dead Time
SKIP
Input Current Logic
Threshold
PGOOD Trip Threshold
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
Logic Input Pull-Up Current
(MAX1711)
FB forced 2% above trip threshold
With respect to unloaded output voltage
(MAX1710)
(MAX1711)
From
SHDN
signal going high
LX to PGND, ILIM tied to V
CC
LX to PGND
R
LIM
= 100kΩ
R
LIM
= 400kΩ
65
0.76
10
90
40
170
-150
100
50
200
-120
3
1.5
0.4
1
150
4.1
4.4
5
5
0.5
1
3
1
35
26
-1.5
-8
2.4
0.8
-1
3
5
1
10
-5
-0.1
-3
1.7
CONDITIONS
With respect to unloaded output voltage (MAX1710)
MIN
10.5
2.21
TYP
12.5
2.25
1.5
70
0.8
75
0.84
30
110
60
230
-80
MAX
14.5
2.29
UNIT
%
V
µs
%
V
ms
mV
mV
mV
mV
µs
V
µA
°C
V
Ω
Ω
Ω
A
A
A
ns
mA
%
V
V
µA
µA
3
MAX1710/MAX1711
LX to PGND, T
A
= +25°C
LX to PGND
FB forced 2% below PGOOD trip threshold, falling edge
I
SINK
= 1mA
High state, forced to 5.5V
Hysteresis = 10°C
Rising edge, hysteresis = 20mV,
PWM disabled below this level
BST-LX forced to 5V
DL, high state
DL, low state
DH forced to 2.5V, BST-LX forced to 5V
DL forced to 2.5V
DL forced to 2.5V
DL rising
DH rising
To enable no-fault mode, T
A
= +25°C
Measured at FB with respect to unloaded output voltage,
falling edge, hysteresis = 1%
D0–D4,
SHDN, SKIP, OVP
D0–D4,
SHDN, SKIP, OVP
SHDN, SKIP, OVP
D0–D4, each forced to GND
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
