EVAL-ADM1275EBZ Datasheet, PDF (5/48 Pages) Analog Devices – Hot-Swap Controller and Digital Power

Data Sheet
ADM1275
Parameter
Min Typ Max Unit Test Conditions/Comments
Circuit Breaker Offset, VCBOS
0.6
0.88
1.12
mV Circuit breaker trip voltage, VCB = VSENSECL − VCBOS
SEVERE OVERCURRENT
Voltage Threshold, VSENSEOC
40
50
mV VISET = 1.0 V; VFLB > 1.1 V; VSS ≥ 2 V
9.5
13.0
mV VISET = 0.25 V; VFLB > 1.1 V; VSS ≥ 2 V
Short Glitch Filter Duration
90
200
ns
VISET > 1.65 V; VSENSE driven from 18 mV to 52 mV;
selectable via PMBus
Long Glitch Filter Duration (Default)
530
900
ns
VSENSE driven from 18 mV to 52 mV
Response Time
With Short Glitch Filter
180
370
ns
2 mV overdrive maximum severe overcurrent threshold
With Long Glitch Filter
645
1020 ns
SOFT START (SS PIN)
SS Pull-Up Current, ISS
−12 −10 −8
µA
VSS = 0 V
Default VSENSECL Limit
0.5
1.25 1.8
mV When VSENSE reaches this level, ISS is enabled, ramping
VSENSECL; VSS = 0 V
SS Pull-Down Current
100
µA
VSS = 1 V
TIMER PIN
Timer Pull-Up Current (POR), ITIMERUPPOR
−2
−3
−4
µA Initial power-on reset; VTIMER = 0.5 V
Timer Pull-Up Current (OC Fault), ITIMERUPFLT −57
−60
−63
µA
Overcurrent fault; 0.2 V ≤ VTIMER ≤ 1 V
Timer Pull-Down Current (Retry), ITIMERDNRT 1.7
2
2.3
µA After fault when GATE is off; VTIMER = 0.5 V
Timer Retry/OC Fault Current Ratio
3.33 3.8
%
Defines the limits of the autoretry duty cycle
Timer Pull-Down Current (Hold),
ITIMERDNHOLD
Timer High Threshold, VTIMERH
100
µA Holds TIMER at 0 V when inactive; VTIMER = 0.5 V
0.98 1.0
1.02 V
Timer Low Threshold, VTIMERL
0.18 0.2
0.22 V
FOLDBACK (FLB PIN)
FLB and PWRGD Threshold, VFLBTH
1.08 1.1
1.12 V
FLB rising; VISET = 1.0 V
Input Current, IFLB
100
nA
VFLB ≤ 1.0 V; VISET = 1.25 V
100
nA
VVCAP ≤ VFLB ≤ 20 V
Hysteresis Current
1.7
2.3
μA
Internal Hysteresis Voltage
1.9
3.1
mV Voltage drop across the internal 1.3 kΩ resistor
Power-Good Glitch Filter, PWRGDGF
0.3
0.7
1
μs
50 mV overdrive
Minimum Foldback Clamp
200
mV Accuracies included in total sense voltage accuracies
VOUT PIN
ADM1275-1 and ADM1275-3
Input Current
20
μA VOUT = 20 V
LATCH PIN
ADM1275-1 and ADM1275-3
Output Low Voltage, VOL_LATCH
0.4
V
ILATCH = 1 mA
1.5
V
ILATCH = 5 mA
Leakage Current
100
nA
VLATCH ≤ 2 V; LATCH output high-Z
1
µA VLATCH = 20 V; LATCH output high-Z
GPO1/ALERT1/CONV PIN (ADM1275-1 and
ADM1275-2), ENABLE PIN (ADM1275-3)
No internal pull-up present on these pins
Output Low Voltage, VOL_GPO1
0.4
V
IGPO1 = 1 mA
Leakage Current
1.5
V
IGPO1 = 5 mA
100
nA
VGPO1 ≤ 2 V; GPO output high-Z
1
µA VGPO1 = 20 V; GPO output high-Z
Input High Voltage, VIH
1.1
V
Input Low Voltage, VIL
0.8
V
GPO2/ALERT2 PIN
ADM1275-1 and ADM1275-3
Output Low Voltage, VOL_GPO2
0.4
V
IGPO2 = 1 mA
1.5
V
IGPO2 = 5 mA
Leakage Current
100
nA
VGPO2 ≤ 2 V; GPO output high-Z
1
µA VGPO2 = 20 V; GPO output high-Z
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