Datasheet

LTC4350
3
4350fb
elecTrical characTerisTics
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.
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DC Characteristics
V
UVTH
UV Pin Threshold High Going Threshold
Low Going Threshold
l
l
1.215
1.205
1.244
1.220
1.258
1.237
V
V
V
OVTH
OV Pin Threshold High Going Threshold
Low Going Threshold
l
l
1.203
1.180
1.220
1.205
1.250
1.229
V
V
V
TM
TIMER Pin Threshold
l
1.18 1.22 1.26 V
I
TM
TIMER Pin Current TIMER On, V
TIMER
= 0V
TIMER On, V
TIMER
= 0V, V
OV
> V
OVTH
l
l
–1.75
–5.30
–2
–6
–2.3
–6.7
µA
µA
V
G
GAIN Pin Voltage R
GAIN
= 25k, (V
R
+
– V
R
–
) = 100mV
l
2.3 2.5 2.7 V
V
GO
GAIN Pin Offset R
GAIN
= 25k, (V
R
+
– V
R
–
) = 0mV
l
0 0.02 0.20 V
V
SB(MIN)
SB Pin Minimum Voltage 2 8 mV
V
SB(MAX)
SB Pin Maximum Voltage V
CC
= 3.3V
V
CC
= 12V
l
l
2.4
5.6
2.7
7.8
2.9
10.5
V
V
I
SB(MAX)
SB Pin Maximum Current V
SB
= 0V
l
–8 –33 –41 mA
R
SB
SB Pin Resistor Value
l
14 20 33 kΩ
V
E/A2OFF
E/A2 Offset V
SB
– V
GAIN
l
8 25 50 mV
V
RSET(MAX)
R
SET
Pin Maximum Voltage V
CC
= 3.3V, R
SET
= 100Ω
V
CC
= 12V, R
SET
= 100Ω
l
l
0.94
0.94
1
1
1.03
1.03
V
V
V
RSET(MIN)
R
SET
Pin Minimum Voltage V
CC
= 5V, R
SET
= 1000Ω
V
CC
= 5V, R
SET
= 100Ω
l
l
0.001
0.001
0.5
0.5
V
V
I
RSET(MAX)
R
SET
Pin Maximum Current R
SET
= 50Ω, V
IOUT
= 1.1V
l
18 20 21 mA
V
RCTH
Reverse Current Threshold V
R
+
– V
R
+
l
10 30 40 mV
∆V
GATE
External N-Channel Gate Drive V
GATE
– V
CC
l
10.8 12 12.7 V
I
GATE
GATE Pin Current Gate On, V
GATE
= 0V
l
–8 –10 –12 µA
V
SOL
STATUS Pin Output Low I
OUT
= 3mA
l
0.1 0.3 1.2 V
Note 2: R
+
and R
–
could be at 17V while V
CC
= 0V.
Note 3: An internal clamp limits the GATE pin to a minimum of 10.8V
above V
CC
. Driving this pin to voltages beyond the clamp may damage the
part.