Rainbow Electronics MAX1715 - Manual (Page 3)

MAX1715
Ultra-High Efficiency, Dual Step-Down
Controller for Notebook Computers
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ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, 4A components from Table 1, V CC = V DD = +5V, SKIP = AGND, V+ = 15V, T A = 0°C to +85°C, unless otherwise
noted.) (Note 1)
(Note 3) ns 400 500 Minimum Off-Time
I REF = 0 to 50µA
No external REF load
ON1 = ON2 = 0
V 2 0.01 Reference Load Regulation
V 1.98 2 2.02 Reference Voltage
µA <1 5 Shutdown Supply Current (V+)
µA <1 5
Shutdown Supply Current
(V
CC + V DD )
Falling edge, hysteresis = 40mV V 1.6 REF Fault Lockout Voltage
10
PGND - LX_, I LIM resistor = 100k Ω
mV
40 50 60 Current-Limit Threshold
(Positive Direction, Adjusted)
PGND - LX_, T A = +25°C, I LIM = V CC mV -145 -120 -95
Current-Limit Threshold
(Negative Direction)
PGND - LX_, SKIP = AGND mV -5 3 10
Current-Limit Threshold, Zero
Crossing
Hysteresis = 10°C °C 150 Thermal Shutdown Threshold
Rising edge, hysteresis = 20mV, PWM disabled below
this level
V 4.1 4.4
V CC Undervoltage Lockout
Threshold
BST - LX forced to 5V Ω 1.5 5 DH Gate Driver On-Resistance
FB1 and FB2 forced above the regulation point µA 1100 1600
Quiescent Supply Current
(V
CC + V DD )
µA 25 70 Quiescent Battery Current (V+)
FB_ forced 2% above trip threshold µs 1.5
Overvoltage Fault Propagation
Delay
With respect to error comparator threshold % 8.5 10.5 13 Overvoltage Trip Threshold
With respect to error comparator threshold % 60 70 80 Output Undervoltage Threshold
From ON_ signal going high ms 10 20 30
Output Undervoltage Lockout
Time
PGND - LX_, I LIM = V CC mV 75 100 125
Current-Limit Threshold
(Positive Direction, Fixed)
ON1 = ON2 = 0
DL, high state Ω 1.5 5
DL Gate Driver On-Resistance
(pull-up)
0.6 2.5
A
DH Gate Driver Source/Sink
Current
DH forced to 2.5V, BST_ - LX_ forced to 5V 1
A DL Gate Driver Source Current DL forced to 2.5V 1
A DL Gate Driver Sink Current DL forced to 2.5V 3
ns Dead Time
DL rising 35
REF in regulation REF Sink Current
DL, low state
DL Gate Driver On-Resistance
(pull-down)
Ω
µA
CONDITIONS UNITS MIN TYP MAX PARAMETER
PGND - LX_, I LIM resistor = 400k Ω 160 200 240
DH rising 26
ON_, SKIP 0.8
V Logic Input High Voltage ON_, SKIP 2.4
V Logic Input Low Voltage