LTC4220 データシートの表示（PDF） - Linear Technology
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LTC4220 Datasheet PDF : 36 Pages
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LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
SYMBOL PARAMETER
CONDITIONS
LTC4252-1/-2
LTC4252A-1/-2
MIN TYP MAX MIN TYP MAX UNITS
ITMR
TIMER Pin Current
Timer On (Initial Cycle/Latchoff/
5.8
Shutdown Cooling, Sourcing),
VTMR = 2V
Timer Off (Initial Cycle, Sinking),
28
VTMR = 2V
Timer On (Circuit Breaker, Sourcing,
230
IDRN = 0μA), VTMR = 2V
Timer On (Circuit Breaker, Sourcing,
630
IDRN = 50μA), VTMR = 2V
Timer Off (Circuit Breaker/
5.8
Shutdown Cooling, Sinking),
VTMR = 2V
ΔITMRACC/ [(ITMR at IDRN = 50μA) – (ITMR at IDRN =
ΔIDRN
0μA)]/ΔIDRN
VDRNL DRAIN Pin Voltage Low Threshold
Timer On (Circuit Breaker with
IDRN = 50μA)
For PWRGD Status (MS Only)
8
2.385
IDRNL
DRAIN Leakage Current
VDRAIN = 5V (4V for LTC4252A)
± 0.1 ±1
VDRNCL
VPGL
IPGH
DRAIN Pin Clamp Voltage
PWRGD Output Low Voltage
PWRGD Pull-Up Current
IDRN = 50μA
7
IPG = 1.6mA (MS Only)
IPG = 5mA (MS Only)
●
0.2 0.4
●
1.1
VPWRGD = 0V (Sourcing) (MS Only) ● 40 58 80
tSS
SS Default Ramp Period
SS Pin Floating, VSS Ramps from
180
0.2V to 2V
5.8
μA
28
mA
230
μA
630
μA
5.8
μA
8
μA/μA
2.385
V
± 0.1 ±1
μA
6
V
0.2 0.4
V
1.1
V
40 58 80
μA
μs
SS Pin Floating, VSS Ramps from
0.1V to 0.9V
230
μs
tPLLUG
tPHLOG
UV Low to Gate Low
OV High to Gate Low
0.4
0.4
μs
0.4
0.4
μs
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to VEE unless otherwise
specified.
425212fd
4
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