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LTC4212CMS Datasheet(PDF) 3 Page - Linear Technology

Part # LTC4212CMS
Description  Hot Swap Controller with Power-Up Timeout
Download  24 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4212CMS Datasheet(HTML) 3 Page - Linear Technology

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3
LTC4212
4212f
VPGFHI
Power Good Glitch Filter High Threshold
q
1.20
1.236
1.26
V
VPGFHST
Power Good Glitch Filter Hysterisis
(Note 4)
40
mV
VPGTHI
Power Good Timer High Threshold
q
0.928
0.952
0.976
V
VPGTLO
Power Good Timer Low Threshold
q
0.640
0.657
0.680
V
VPGT∆V
Power Good Timer Delta Threshold
q
0.283
0.295
0.304
V
IPGT
Power Good Timer Pin Current
Power Good Timer On, CPGT Charging, PGT = 0.65V
q
– 5.61
– 5.1
– 4.59
µA
Power Good Timer On, CPGT Discharging, PGT = 0.95V
q
4.63
5.2
5.77
µA
Power Good Timer Off, PGT = 1.5V
5
mA
IPGF
Power Good Glitch Filter Pin Current
Power Good Glitch Filter On, CPGF Charging
q
– 5.61
-5.1
– 4.49
µA
Power Good Timer Off, PGF = 1.5V
5
mA
ITMR
TIMER Current
Timer On, VTIMER = 1V
q
– 2.5
– 2
– 1.5
µA
Timer Off, TIMER = 1.5V
5
mA
VTMR
TIMER Threshold
TIMER Low to High
q
1.20
1.236
1.26
V
TIMER High to Low
q
0.15
0.200
0.40
V
VFAULT
FAULT Threshold
Latched Off Threshold, FAULT High to Low
q
1.20
1.236
1.26
V
VFAULTHST
FAULT Threshold Hysteresis
50
mV
VOLFAULT
Output Low Voltage
IFAULT = 1.6mA
q
0.14
0.4
V
tTO
Power Good Time-Out
CPGT =10nF, PGT = 0.1V to FAULT Low
q
16.3
18.16
20
ms
tFAULTLO
Power Good Input Low at Time-Out to
End of 14th PGT Cycle
1
µs
GATE Discharging
tFAULTVG
Valid Power Good Glitch to GATE
PGF > 1.26V
1.5
µs
Discharging
tFAULTFC
FAST COMP Trip to GATE Discharging
VCB = 0mV to 200mV Step
q
500
700
ns
tFAULTSC
SLOW COMP Trip to GATE Discharging
VCB = 0mV to 100mV Step
q
10
18
30
µs
tEXTFAULT
FAULT Low to GATE Discharging
VFAULT = 5V to 0V
q
13
5
µs
tRESET
Circuit Breaker Reset Delay Time
ON Low to FAULT High
q
120
250
µs
tOFF
Turn-Off Time
ON Low to GATE Off
10
µs
The q denotes specifications which apply over the full operating
temperature range, otherwise specifications are TA = 25°C. VCC = 5V, unless otherwise noted. (Note 2)
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All current into device pins are positive; all current out of device
pins are negative; all voltages are referenced to ground unless otherwise
specified.
Note 3: An internal clamp limits the GATE pin to a minimum of 10V above
VCC. Driving this pin to voltages beyond the clamp may damage the part. If
a lower GATE pin voltage is desired, use an external zener diode. The GATE
capacitance must be < 0.15
µF at maximum VCC.
Note 4: Guaranteed by design and not tested in production.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS


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