ADM1276-3ACPZ-RL datasheet(5/48 Pages) AD

部品番号	ADM1276-3ACPZ-RL

部品情報	Hot Swap Controller and Digital Power and Energy Monitoring with PMBus Interface

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ADM1276

Rev. 0 | Page 5 of 48

Parameter

Symbol

Min

Typ

Max

Unit

Test Conditions/Comments

Foldback Active

3.5

4

4.5

mV

VFLB = 0 V; VGATE = (SENSE+) + 3 V; IGATE = 0 μA; VSS ≥ 1 V

9.6

10

10.4

mV

VISET > 1.0 V; VFLB = 0.5 V; VGATE = (SENSE+) + 3 V; IGATE = 0 μA;

VSS ≥ 1 V

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

ITIMERUP

Power-On Reset(POR)

ITIMERUPPOR

−2

−3

−4

μA

Initial power-on reset; VTIMER = 0.5 V

Overcurrent (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

Hold

ITIMERDNHOLD

100

μA

Holds TIMER at 0 V when inactive; VTIMER = 0.5 V

Timer Retry/OC Fault

Current Ratio

3.33

3.8

%

Defines the limits of the autoretry duty cycle

Timer High Threshold

VTIMERH

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

Input Current

20

μA

VOUT = 20 V

LATCH PIN

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

ENABLE PIN

No internal pull-up present on this pin

Leakage Current

100

nA

VGPO2 ≤ 2 V

1

μA

VGPO2 = 20 V

Input High Voltage

VIH

1.1

V

Input Low Voltage

VIL

0.8

V

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