LTC4231
4
4321fa
For more information www.linear.com/LTC4231
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. IN = 12V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
UVL, UVH, OV, GNDSW, STATUS and SHDN
V
UV
UVL, UVH Threshold
l
0.776 0.795 0.814 V
V
OV
OV Threshold OV Rising
l
0.776 0.795 0.814 V
V
OV(HYST)
OV Hysteresis
l
3 15 30 mV
I
LEAK(0.9V)
UVL, UVH and OV Leakage Current V = 0.9V (C-Grade, I-Grade)
(H-Grade)
l
l
0
0
±10
±100
nA
nA
I
LEAK(12V)
UVL, UVH, OV, GNDSW, STATUS and
SHDN Leakage Current
V = 12V (C-Grade, I-Grade)
(H-Grade)
l
l
0
0
±100
±500
nA
nA
R
ON(GNDSW)
Switch Resistance
l
80 200 Ω
V
OL
STATUS Output Low Voltage I = 2mA
l
0.2 0.4 V
V
SHDN
SHDN Input Threshold
l
0.4 0.8 1.5 V
t
PERIOD
Sampling Period
l
5 10 15 ms
t
SAMPLE
Sampling Width
l
100 200 300 µs
TIMER
t
CB
Circuit Breaker Delay C
T
= 100nF
l
1.7 2.4 3.5 ms
V
TIMER(H)
TIMER High Threshold TIMER Rising
l
1.170 1.193 1.216 V
V
TIMER(L)
TIMER Low Threshold TIMER Falling
l
0.07 0.1 0.13 V
I
TIMER(UP)
TIMER Pull-Up Current TIMER = 0.5V, Circuit Breaker Tripped
l
–35 –50 –65 µA
I
TIMER(DN)
TIMER Pull-Down Current TIMER = 0.5V, Circuit Breaker Recovery
l
3 5 7 µA
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 GND unless other
wise
specified.
Note 3: These pins can be tied to voltages below –0.3V through a
resistance that limits the current below 1mA.
Note 4: An internal clamp limits GATE to a minimum of 13V above
SOURCE. Driving this pin to voltages beyond this clamp may damage the
device.
Note 5: For modes where GATE is pulled to GND, I
CC
= I
IN
+ I
SENSE
.
Else I
CC
= I
IN
+ I
SENSE
+ I
SOURCE
.