Datasheet

ADM1276 Data Sheet
Rev. C | Page 4 of 48
SPECIFICATIONS
V
CC
= 2.95 V to 20 V, V
CC
≥ V
SENSE+
, V
SENSE+
= 2 V to 20 V, V
SENSE
= (V
SENSE+
− V
SENSE−
) = 0 V, T
A
= −40°C to +85°C, unless otherwise noted.
Table 1.
Parameter Symbol Min Typ Max Unit Test Conditions/Comments
POWER SUPPLY
Operating Voltage Range V
CC
2.95 20 V
Undervoltage Lockout 2.4 2.7 V V
CC
rising
Undervoltage Hysteresis 90 120 mV
Quiescent Current I
CC
5 mA GATE on and power monitor running
UV PIN
Input Current I
UV
100 nA UV ≤ 3.6 V
UV Threshold UV
TH
0.97 1.0 1.03 V UV falling
UV Threshold Hysteresis UV
HYST
40 50 60 mV
UV Glitch Filter
UV
GF
2
7
μs
50 mV overdrive
UV Propagation Delay UV
PD
5 8 μs UV low to GATE pull-down active
OV PIN
Input Current
I
OV
100
nA
OV ≤ 3.6 V
OV Threshold OV
TH
0.97 1.0 1.03 V OV rising
OV Threshold Hysteresis OV
HYST
50 60 70 mV
OV Glitch Filter OV
GF
0.5 1.5 μs 50 mV overdrive
OV Propagation Delay OV
PD
1.0 2 μs OV high to GATE pull-down active
SENSE+ AND SENSE− PINS
Input Current I
SENSEx
150 μA Per individual pin; SENSE+, SENSE− = 20 V
Input Imbalance I
ΔSENSE
5 μA I
ΔSENSE
= (I
SENSE+
) − (I
SENSE−
)
VCAP PIN
Internally Regulated
Voltage
V
VCAP
2.66 2.7 2.74 V 0 µA ≤ I
VCAP
≤ 100 µA; C
VCAP
= 1 μF
ISET PIN
Reference Select Threshold V
ISETRSTH
1.35 1.5 1.65 V If V
ISET
> V
ISETRSTH
, an internal 1 V reference (V
CLREF
) is used
Internal Reference V
CLREF
1 V Accuracies included in total sense voltage accuracies
Gain of Current Sense
Amplifier
AV
CSAMP
50
V/V
Accuracies included in total sense voltage accuracies
Input Current I
ISET
100 nA V
ISET
≤ V
VCAP
GATE PIN
Maximum voltage on the gate is always clamped to ≤31 V
Gate Drive Voltage ΔV
GATE
ΔV
GATE
= V
GATE
− V
SENSE+
10 12 14 V 15 V ≥ V
CC
≥ 8 V; I
GATE
≤ 5 μA
4.5 13 V 20 V ≥ V
CC
≥ 15 V; I
GATE
≤ 5 μA
8 10 V V
SENSE+
= V
CC
= 5 V; I
GATE
≤ 5 μA
4.5
6
V
V
SENSE+
= V
CC
= 2.95 V; I
GATE
≤ 1 μA
Gate Pull-Up Current I
GATEUP
−20 −30 μA V
GATE
= 0 V
Gate Pull-Down Current I
GATEDN
Regulation I
GATEDN_REG
45 60 75 μA V
GAT E
≥ 2 V; V
ISET
= 1.0 V; (SENSE+) − (SENSE−) = 30 mV
Slow I
GATEDN_SLOW
5 10 15 mA V
GATE
≥ 2 V
Fast I
GATEDN_FAST
750 1500 2000 mA V
GATE
≥ 12 V; V
CC
≥ 12 V
Gate Holdoff Resistance
20
Ω
V
CC
= 0 V
HOT SWAP SENSE VOLTAGE
Hot Swap Sense Voltage
Current Limit
V
SENSECL
19.6 20 20.4 mV
V
ISET
> 1.65 V; V
FLB
> 1.12 V; V
GATE
= (SENSE+) + 3 V; I
GATE
= 0 μA;
V
SS
≥ 2 V
Foldback Inactive V
GATE
= (SENSE+) + 3 V; I
GATE
= 0 μA; V
SS
≥ 2 V
24.6 25 25.4 mV V
ISET
= 1.25 V; V
FLB
> 1.395 V
19.6 20 20.4 mV V
ISET
= 1.0 V; V
FLB
> 1.12 V
9.6 10 10.4 mV V
ISET
= 0.5 V; V
FLB
> 0.57 V
4.6
5
5.4
mV
V
ISET
= 0.25 V; V
FLB
> 0.295 V