LTC4252-1/LTC4252-2
LTC4252A-1/LTC4252A-2
ELECTRICAL CHARACTERISTICS
SYMBOL
I
TMR
PARAMETER
TIMER Pin Current
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
CONDITIONS
Timer On (Initial Cycle/Latchoff/
Shutdown Cooling, Sourcing),
V
TMR
= 2V
Timer Off (Initial Cycle, Sinking),
V
TMR
= 2V
Timer On (Circuit Breaker, Sourcing,
I
DRN
= 0μA), V
TMR
= 2V
Timer On (Circuit Breaker, Sourcing,
I
DRN
= 50μA), V
TMR
= 2V
Timer Off (Circuit Breaker/
Shutdown Cooling, Sinking),
V
TMR
= 2V
LTC4252-1/-2
MIN
TYP MAX
5.8
LTC4252A-1/-2
MIN
TYP MAX
5.8
UNITS
μA
28
230
630
5.8
28
230
630
5.8
mA
μA
μA
μA
ΔI
TMRACC
/ [(I
TMR
at I
DRN
= 50μA) – (I
TMR
at I
DRN
=
ΔI
DRN
0μA)]/ΔI
DRN
V
DRNL
I
DRNL
V
DRNCL
V
PGL
I
PGH
t
SS
DRAIN Pin Voltage Low Threshold
DRAIN Leakage Current
DRAIN Pin Clamp Voltage
PWRGD
Output Low Voltage
PWRGD
Pull-Up Current
SS Default Ramp Period
Timer On (Circuit Breaker with
I
DRN
= 50μA)
For
PWRGD
Status (MS Only)
V
DRAIN
= 5V (4V for LTC4252A)
I
DRN
= 50μA
I
PG
= 1.6mA (MS Only)
I
PG
= 5mA (MS Only)
V
PWRGD
= 0V (Sourcing) (MS Only)
SS Pin Floating, V
SS
Ramps from
0.2V to 2V
SS Pin Floating, V
SS
Ramps from
0.1V to 0.9V
●
●
●
8
2.385
± 0.1
7
0.2
40
58
180
0.4
1.1
80
40
±1
8
2.385
± 0.1
6
0.2
58
0.4
1.1
80
±1
μA/μA
V
μA
V
V
V
μA
μs
230
0.4
0.4
0.4
0.4
μs
μs
μs
t
PLLUG
t
PHLOG
UV Low to Gate Low
OV High to Gate Low
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 V
EE
unless otherwise
specified.
425212fd
4
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