With respect to unloaded output voltage
MAX1710/MAX1711/MAX1712
High-Speed, Digitally Adjusted
Step-Down Controllers for Notebook CPUs
_______________________________________________________________________________________ 3
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.)
CONDITIONS UNITMIN TYP MAXPARAMETER
LX to PGND
LX to PGND, ILIM tied to V
CC
From SHDN signal going high
mV
40 50 60
Current-Limit Threshold
(Positive Direction, Adjustable)
mV90 100 110
Current-Limit Threshold
(Positive Direction, Fixed)
ms10 30
Output Undervoltage Protection
Time
%65 70 75
Output Undervoltage Protection
Threshold
LX to PGND, T
A
= +25°C mV-150 -120 -80
Current-Limit Threshold
(Negative Direction)
R
LIM
= 100kΩ
R
LIM
= 400kΩ 170 200 230
Rising edge, hysteresis = 20mV,
PWM disabled below this level
V4.1 4.4
V
CC
Undervoltage Lockout
Threshold
BST-LX forced to 5V Ω5DH Gate-Driver On-Resistance
DL, high state Ω5
DL Gate-Driver On-Resistance
(Pullup)
DL, low state Ω0.5 1.7
DL Gate-Driver On-Resistance
(Pulldown)
DH forced to 2.5V, BST-LX forced to 5V A1
DH Gate-Driver Source/Sink
Current
DL forced to 2.5V A3DL Gate-Driver Sink Current
DL forced to 2.5V A1DL Gate-Driver Source Current
FB forced 2% above trip threshold µs1.5
Overvoltage Fault Propagation
Delay
%10.5 12.5 14.5
Overvoltage Trip Threshold
FB forced 2% below PGOOD trip threshold, falling edge µs1.5PGOOD Propagation Delay
LX to PGND mV3
Current-Limit Threshold
(Zero Crossing)
I
SINK
= 1mA V0.4PGOOD Output Low Voltage
High state, forced to 5.5V µA1PGOOD Leakage Current
Hysteresis = 10°C °C150Thermal Shutdown Threshold
V2.21 2.25 2.29
0.76 0.8 0.84
With respect to unloaded output voltage (MAX1710)
With respect to unloaded output voltage (MAX1710)
(MAX1711/MAX1712) V
DL rising
ns
35
Dead Time
DH rising 26
mA
SKIP Input Current Logic
Threshold
To enable no-fault mode, T
A
= +25°C -1.5 -0.1
%PGOOD Trip Threshold
Measured at FB with respect to unloaded output voltage,
falling edge, hysteresis = 1%
-8 -5 -3
VLogic Input High Voltage
D0–D4, SHDN, SKIP, OVP
2.4
VLogic Input Low Voltage
D0–D4, SHDN, SKIP, OVP
0.8
µALogic Input Current
SHDN, SKIP, OVP
-1 1
µALogic Input Pullup Current D0–D4, each forced to GND 3510
(MAX1711/MAX1712)
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