MAX6397 Datasheet, PDF (3/17 Pages) Maxim Integrated Products – Overvoltage Protection Switch/Limiter Controllers Operate Up to 72V

Overvoltage Protection Switch/Limiter
Controllers Operate Up to 72V
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = 14V; C_GATE = 6000pF, C_REG = 4.7µF, T_A = T_J = -40°C to +125°C, unless otherwise noted. Typical values are at T_A = T_J = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
REG Output Voltage
(V_IN ≥ V_REG + 1.8V)
Dropout Voltage (Note 4)
Current Limit
MAX6397L/M
I_REG = 1mA
1mA < I_REG < 100mA
4.925
4.85
5
5.120
5.15
MAX6397S/T
I_REG = 1mA
3.243 3.3 3.360
V
1mA < IREG < 100mA
3.201
3. 360
V_REG
MAX6397Y/Z
I_REG = 1mA
2.456 2.5 2.542
1mA < I_REG < 100mA
2.41
2.55
MAX6397V/W
I_REG = 1mA
1.760 1.8 1.837
1mA < I_REG < 100mA
1.715
1.837
mV/V
∆VDO ^{5.5V ≤ VIN ≤ 72V, IREG = 1mA, VREG = 5V}
0.12
5.5V ≤ VIN ≤ 72V, I_REG = 100mA, V_REG = 5V
1.2
VIN = 14V
150
300
mA
Overvoltage-Protection Threshold
V_OVP
Overvoltage-Protection Sink Current
Line Regulation (Note 5)
I_OVP
∆ V_REG /
∆V_REG
V_REG = 1.1 x V_REG (nominal)
6.5V ≤ VIN ≤ 72V, I_REG = 10mA, V_REG = 5V
5.5V ≤ VIN ≤ 72V, I_REG = 1mA, V_REG = 5V
5.5V ≤ VIN ≤ 72V, I_REG = 100mA, V_REG = 5V
105
% of
V_REG
15
mA
0.22
0.05 mV/mA
1.5
Load Regulation
∆VREG /
∆IREG
1mA ≤ I_REG ≤ 100mA, V_REG = 5V
0.8 mV/mA
Power-Supply Rejection Ratio
Startup Response Time
t_START
I_REG = 10mA, f = 100Hz, 0.5V_P-P
R_REG = 500Ω, V_REG = 5V, C_REG = 4.7µF
L
55
dB
180
µs
4.500 4.67 4.780
M
4.230 4.375 4.500
T
2.966 3.053 3.140
POK Assertion Threshold
(MAX6397 Only)
S
V_{POK_TH Z}
2.805 2.892 2.970
V
2.250 2.304 2.375
Y
2.125 2.188 2.250
W
1.590 1.653 1.696
V
1.524 1.575 1.625
REG to POK Delay
V_REG rising or falling
35
µs
POK Leakage Current
V_POK = 5V
100
nA
POK Output Low Voltage
V_OL V_IN ≥ 1.5V, I_SINK = 1.6mA, POK asserted
0.3
V
Note 1: Specifications to -40°C are guaranteed by design and not production tested.
Note 2: The MAX6397/MAX6398 power up with the external FET in off mode (V_GATE = GND). The external FET turns on t_START after the
device is powered up and all input conditions are valid.
Note 3: For accurate overtemperature shutdown performance, place the device in close thermal contact with the external MOSFET.
Note 4: Dropout voltage is defined as V_IN - V_REG when V_REG is 2% below the value of V_REG for V_IN = V_REG (nominal) + 2V.
Note 5: Operations beyond the thermal dissipation limit may permanently damage the device.
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