Electrical characteristics (continued) – Rainbow Electronics MAX1718 User Manual
Page 5
MAX1718
Notebook CPU Step-Down Controller for Intel
Mobile Voltage Positioning (IMVP-II)
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(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)
Measured at V
DD
, FB forced above the regulation point
µA
5
Quiescent Supply Current (V
DD
)
µA
40
Quiescent Battery Supply
Current (V+)
SKP/SDN = 0
SKP/SDN = 0
µA
5
Shutdown Supply Current (V
DD
)
µA
5
Shutdown Supply Current (V
CC
)
V
CC
= 4.5V to 5.5V, no REF load
SKP/SDN = 0, V
CC
= V
DD
= 0 or 5V
CONDITIONS
V
1.98
2.02
Reference Voltage
µA
5
Shutdown Battery Supply
Current (V+)
UNITS
MIN
TYP
MAX
PARAMETER
Measured at FB
DL, low state (pulldown)
DL, high state (pullup)
GND - LX
Rising edge, hysteresis = 20mV, PWM disabled below this
level
GND - LX, ILIM = V
CC
With respect to unloaded output voltage
LX - GND, ILIM = V
CC
Ω
1.0
3.5
DL Gate Driver On-Resistance
V
4.1
4.4
V
CC
Undervoltage Lockout
Threshold
mV
-145
-90
Current-Limit Threshold Voltage
(Negative)
V
1.95
2.05
Overvoltage Trip Threshold
160
240
mV
33
65
Current-Limit Threshold Voltage
(Positive, Adjustable)
mV
80
115
Current-Limit Threshold Voltage
(Positive, Default)
%
65
75
Output Undervoltage Protection
Threshold
ILIM = 0.5V
ILIM = REF (2V)
Measured at V
CC
, FB forced above the regulation point
µA
1300
Quiescent Supply Current (V
CC
)
BST - LX forced to 5V
Ω
3.5
DH Gate Driver On-Resistance
TON = GND (1000kHz)
ns
375
Minimum Off-Time (Note 1)
TON = V
CC
, open, or REF (200kHz, 300kHz, or 550kHz)
500
Measured at FB with respect to unloaded output voltage
%
-12.5
-7.5
VGATE Lower Trip Threshold
Measured at FB with respect to unloaded output voltage
%
+7.5
+12.5
VGATE Upper Trip Threshold
BIAS AND REFERENCE
FAULT PROTECTION
GATE DRIVERS