LTC2952 Ver la hoja de datos (PDF) - Linear Technology
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LTC2952 Datasheet PDF : 30 Pages
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LTC2952
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. V1 = V2 = VS = 2.7V TO 28V unless otherwise noted. (Notes 2, 3)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Debounce Time Pins (ONT, OFFT)
IONT,OFFT
ONT/OFFT Pull-Up/Pull-Down Current VONT, VOFFT = 0V (Pull-Up), VONT, VOFFT = 1.5V l ±1.6 ±2.0 ±2.4
μA
When Timer Is Active
(Pull-Down)
tDB,ON/OFF
Internal Default On-Time/Off-Time tDB,ON: CONT = Open, Measured Time Between l 18
26
34
ms
PB Low → EN High, tDB,OFF: Measured Time
Between PB Low → INT High
tONT,OFFT
Additional Adjustable Turn-On/Turn- CONT = 1500pF, COFFT = 1500pF
Off Time (Note 7)
l 10
15
20
ms
Accurate Comparator Input Pins (VM, PFI, M1, M2, KILL)
VTH_VM
VTH
VM Input Reset Threshold
PFI, M1, M2, KILL Input Threshold
Voltage
Both Falling and Rising
Falling
l 0.492 0.500 0.508
V
l 0.492 0.500 0.508
V
VHYS
PFI, M1, M2, KILL Input Hysteresis
IIN_LKG
VM, PFI, M2, KILL Input Current
IM1_SRC
M1 Input Pull-Up Current
VM1(VOC)
M1 Voltage Open-Circuit
IM1_LKG
M1 Input Leak Current
Watchdog/Extend Pin (WDE)
V = 0.5V
M1 = 1V
M1 = 6V
l
5
15
25
mV
l
±0.1
μA
l –1.5
–3
–5
μA
l
1
4
6
V
l
±0.1
μA
VWDE(H,TH)
Input High Threshold Voltage
VWDE(L,TH)
Input Low Threshold Voltage
IWDE(IN,HL)
High Low Input Current (Note 8)
IWDE(IN,HZ)
Hi-Z Input Current
Open-Drain Output Pins (G1STAT, INT, RST, PFO)
VWDE = 0.7V, 1.1V
l
l 0.3
l
l ±10
1.5
V
V
±25
μA
μA
IOUT_LKG
Leakage Current
VOL
Voltage Output Low
High Voltage Open-Drain Output Pin (EN)
VPIN = 5V
IPIN = 1mA
l
±1
μA
l
0.4
V
IEN(LKG)
VEN(VOL)
EN Leakage Current
EN Voltage Output Low
Voltage Monitor/Watchdog Timing
VEN = 28V, EN Sink Current Off
l
IEN = 3mA
l
V1 = 1.2V and/or V2 = 1.2V, IEN = 100μA
l
±1
μA
0.4
V
0.05 0.3
V
tRST
tWDE
tWDE(PW MIN)
Reset Timeout Period
Watchdog Timeout Period
Minimum Period Between
Consecutive Edges
l 140
200
260
ms
l 1.1
1.6
2.1
s
l
5
10
μs
tVM(UV)
tPFI
VM Undervoltage Detect to RST
PFI Delay to PFO
VM Less Than VTH_VM by More Than 1%
PFI More or Less Than VPFI_TH by More
Than 1%
150
μs
150
μs
2952fa
4
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