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ADM1270 Datasheet(PDF) 4 Page - Analog Devices

Part No. ADM1270
Description  High Voltage Input Protection Device
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADM1270 Datasheet(HTML) 4 Page - Analog Devices

 
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ADM1270
Data Sheet
Rev. A | Page 4 of 21
Parameter
Symbol
Min
Typ
Max
Unit
Test Conditions/Comments
CURRENT SENSE VOLTAGE
Sense Voltage Current Limit
(VSENSE+ − VSENSE−)
VSENSECL
47
50
53
mV
VISET > 2.65 V, VFLB > 1.1 V, ΔVGATE = 3 V, IGATE = 0 µA
Foldback Inactive
62.5
mV
VISET = 2.5 V, VFLB > 1.35 V, ΔVGATE = 3 V, IGATE = 0 µA
47
50
53
mV
VISET = 2 V, VFLB > 1.1 V, ΔVGATE = 3 V, IGATE = 0 µA
22.5
25.0
27.5
mV
VISET = 1 V, VFLB > 0.57 V, ΔVGATE = 3 V, IGATE = 0 µA
10.0
12.5
15.0
mV
VISET = 0.5 V, VFLB > 0.3 V, ΔVGATE = 3 V, IGATE = 0 µA
Foldback Active
7
10
13
mV
VFLB = 0 V, ΔVGATE = 3 V, IGATE = 0 µA
22
25
28
mV
VISET > 2 V, VFLB = 0.5 V, ΔVGATE = 3 V, IGATE = 0 µA
Circuit Breaker Offset
VCBOS
0.5
1
1.5
mV
Circuit breaker trip voltage, VCB = VSENSECL − VCBOS
SEVERE OVERCURRENT
Voltage Threshold
VSENSEOC
90
100
110
mV
VISET > 2.65 V
20
25
30
mV
VISET = 0.5 V
Glitch Filter Duration
0.4
1.6
µs
Response Time
2.0
3.5
µs
TIMER PIN
TIMER Pull-Up Current
ITIMERUP
−18
−20
−22
µA
Overcurrent fault, 0.2 V ≤ VTIMER ≤ 2 V
TIMER High Threshold
VTIMERH
1.96
2.0
2.04
V
TIMER Low Threshold
VTIMERL
0.075
0.10
0.12
V
TIMER Pull-Down Current
ITIMERPD
0.85
1.15
µA
Timer pin voltage = 0.2 V
75
105
µA
Timer pin voltage = 0.05 V
TIMER_OFF PIN
Power-On Reset Pull-Up Current
IPOR
−18
−20
−22
µA
Initial power-on reset, VTIMER_OFF = 1 V
Retry Pull-Up Current
ITMROFF
−0.85
−1
−1.15
µA
After fault when GATE is off, VTIMER_OFF = 1 V
TIMER_OFF High Threshold
VTMROFFH
1.96
2.0
2.04
V
FOLDBACK (FLB PIN)
Input Current
IFLB
0.005
0.2
µA
VFLB ≤ 5.5 V, TA = −40°C to +85°C
0.005
1
µA
VFLB ≤ 5.5 V, TA = −40°C to +125°C
PWRGD FEEDBACK INPUT (FB_PG PIN)
Input Current
IFBPG
0.005
0.2
µA
VFB_PG ≤ 5.5 V, TA = −40°C to +85°C
0.005
1
µA
VFB_PG ≤ 5.5 V, TA = −40°C to +125°C
PWRGD Rising Threshold
VPGTH
0.985
1.0
1.015
V
FB_PG rising
PWRGD Threshold Hysteresis
PGHYST
25
30
35
mV
Power-Good Glitch Filter
PGGF
0.5
1.5
µs
50 mV overdrive
FAULT PIN
Output Low Voltage
VOL_FAULT
0.1
V
IFAULT = 100 µA
0.4
V
IFAULT = 1 mA
Leakage Current
IFAULT
0.005
1
µA
VFAULT = 5.5 V, FAULT output high-Z
ENABLE PIN
Input High Voltage
VIH
1.2
V
Input Low Voltage
VIL
0.4
V
Leakage Current
IEN
0.005
1
µA
VEN = 5.5 V
PWRGD PIN
Output Low Voltage
VOL_PWRGD
0.1
V
IPWRGD = 100 µA
0.4
V
IPWRGD = 1 mA
Output Low Voltage
VOL_PWRGD
0.4
V
VCC = 1.7 V, ISINK = 100 µA,
Leakage Current
IPWRGD
0.005
1
µA
VPWRGD = 60 V, PWRGD output high-Z


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