MAX14571_13 Datasheet, PDF (3/14 Pages) Maxim Integrated Products – Adjustable Overvoltage and Overcurrent Protectors with High Accuracy

MAX14571/MAX14572/MAX14573
Adjustable Overvoltage and Overcurrent
Protectors with High Accuracy
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 4.5V to 36V, TA = -40NC to +85NC, unless otherwise noted. Typical values are at VIN = 24V, RISET. = 12kI, TA = +25°C.) (Note 3)
PARAMETER
INTERNAL FETs
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Internal FET On-Resistance
Current-Limit Adjustment Range
Current-Limit Accuracy
RON
ILIM
ILOAD = 100mA, VIN R 8V
(Notes 5, 6)
100 160
mI
0.7
4.2
A
-15
+15
%
FLAG Assertion Drop Voltage
Threshold
VFA
Increase (VIN - VOUT) drop until FLAG
asserts, VIN = 24V
560
mV
Reverse Current Blocking Threshold
VRIB
VOUT - VIN
40
100 160
mV
Reverse Blocking Leakage Current
FLAG OUTPUT
IRBL
VOUT - VIN > 160mV, current into OUT
400 600
FA
FLAG Output Logic-Low Voltage
ISINK = 1mA
0.4
V
FLAG Output Leakage Current
VIN = VFLAG = 5V, FLAG desasserted
2
FA
LOGIC INPUT
HVEN Threshold Voltage
HVEN Threshold Hysteresis
VHVEN_TH
1
2
3.5
V
2
%
HVEN Input Leakage Current
IHVEN_LEAK VHVEN = 36V
26
40
FA
HVEN Input Reverse Leakage
Current
IHVEN_RLEAK VIN = VHVEN = -36V
-45
-27
FA
EN, RIEN Input Logic-High
VIH
EN, RIEN Input Logic-Low
VIL
1.4
V
0.4
V
EN, RIEN Input Leakage Current
IEN_LEAK,
IRIEN_LEAK
VEN = VRIEN = 5.0V
-1
+1
FA
THERMAL PROTECTION
Thermal Shutdown
TJC_MAX
Thermal-Shutdown Hysteresis
TJC_HYST
TIMING CHARACTERISTICS (Note 7)
Low-to-high temperature
High-to-low temperature
150
NC
30
NC
Switch Turn-On Time
tON
From OFF to IN, see Table 1. RLOAD =
240I, COUT = 470FF
25
ms
Switch Turn-Off Time
tOFF
RLOAD = 47I
3
Fs
Overvoltage Switch Turn-Off Time
tOFF_OVP
VIN > VOVLO to VOUT = 80% of VOVLO,
RLOAD = 47I, RSETI = 10kI
3
Fs
Overcurrent Switch Turn-Off Time tOFF_OCP IIN > ILIM, after tBLANK, ILIM = 1A
3
Fs
IN Debounce Time
tDEB
VIN changes from 0V to greater than
VUVLO to VOUT = 10% of VIN
15.0 16.7 18.4
ms
Blanking Time
tBLANK
18.6 20.7 22.8
ms
Autoretry Time
tRETRY
After blanking time from IOUT > ILIM to
FLAG clear (deassertion) (Note 8)
540
600
660
ms
Maxim Integrated
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