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
.
LTC4231
5
4321fa
For more information www.linear.com/LTC4231
Average Supply Current vs IN
Average Supply Current
(Normal On) vs GATE Leakage
Average Supply Current
vs Temperature
Typical perForMance characTerisTics
V
IN
(V)
0
0
I
CC
(µA)
3
4
1
2
5
10 20 30
4231 G01
40
NORMAL ON
I
GATE
= –0.1µA
SHUTDOWN
I
GATE
(µA)
–0.01
1
I
CC
(µA)
10
100
1000
–0.1 –1 –10
4231 G02
–100
V
IN
= 12V
TEMPERATURE (°C)
–50
0.1
I
CC
(µA)
1
10
100
–25 0 25 50 75 125100
4231 G03
150
V
IN
= 12V
NORMAL ON
I
GATE
= –1µA
NORMAL ON
I
GATE
= –0.1µA
NORMAL ON
I
GATE
= 0
SHUTDOWN
Supply Current (Reverse Input)
vs IN ∆V
GATE
(Average) vs IN
∆V
GATE
(Average)
vs GATE Leakage
V
IN
(V)
0
0
I
CC
(mA)
–1
–2
–3
–10 –30–20
4231 G04
–40
V
IN
(V)
I
GATE
= –0.1µA
0
4
V
GATE
(V)
6
8
10
12
14
10 3020
4231 G05
40
I
GATE
(µA)
V
IN
= 12V
V
IN
= 2.7V
0
0
V
GATE
(V)
6
8
2
4
10
12
14
16
–6 –10–8–2 –4
4231 G06
–12
LTC4231
6
4321fa
For more information www.linear.com/LTC4231
Typical perForMance characTerisTics
GATE Pull-Up Current vs V
GATE
Overcurrent to GATE Low
Propagation Delay
UVL, UVH, OV Thresholds
vs Temperature
GNDSW Switch Resistance
vs IN
STATUS Output Low Voltage
vs Current
STATUS Output Low Voltage
vs Temperature
V
GATE
(V)
V
IN
= 12V
0
0
I
GATE(UP)
(µA)
–5
–10
–15
–20
15 205 10
25
V
IN
– V
SENSE
(mV)
C
GATE
= 1nF
C
TIMER
= 82nF
50
0.1
OVERCURRENT TO GATE LOW
PROPAGATION DELAY (µs)
1
10
100
1000
200 350100 150 300250
4231 G08
400
TEMPERATURE (°C)
V
IN
= 12V
UVL HIGH TO LOW
UVH LOW TO HIGH
OV LOW TO HIGH
OV HIGH TO LOW
–50
0.770
THRESHOLD (V)
0.775
0.780
0.785
0.790
0.795
0.800
10075 12525 50–25 0
4231 G09
150
V
IN
(V)
0
70
R
ON(GNDSW)
(Ω)
80
90
100
110
20 3010
4231 G10
40
I
STATUS
(mA)
V
IN
= 12V
0
0
V
STATUS
(mV)
100
200
300
400
500
600
4321
4231 G11
5
TEMPERATURE (°C)
V
IN
= 12V
I
STATUS
= 2mA
–50
0
V
STATUS
(mV)
100
200
300
400
10075 12525 50–25 0
4231 G12
150

LTC4231IMS-1#TRPBF

Mfr. #:
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers Micropower Hot Swap Controller with Latchoff
Lifecycle:
New from this manufacturer.
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