LTC1981/LTC1982
3
SUPPLY VOLTAGE, V
CC
(V)
1.5
GATE DRIVE VOLTAGE (V)
5.5
1982 G01
2.5
3.5
4.5
5.0
2.0
3.0
4.0
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
T
A
= 25°C
GATE DRIVE VOLTAGE
(V
GS
COMMON SOURCE)
GATE DRIVE –V
CC
(V
GS
SOURCE FOLLOWER)
SUPPLY VOLTAGE (V)
1.0
0
SUPPLY CURRENT (µA)
5
15
20
25
2.0
3.0
3.5 5.5
1982 G02
10
1.5 2.5
4.0
4.5
5.0
T
A
= 25°C
LTC1981 OR
BOTH CHANNELS ON
LTC1982
EITHER CHANNEL ON
LTC1982
GATE DRIVE VOLTAGE (V)
0
GATE DRIVE CURRENT (µA)
100
10
1
0.1
34 6712 5 8
1982 G03
V
CC
= 3.3V
V
CC
= 2.7V
V
CC
= 1.8V
T
A
= 25°C
V
CC
= 5V
SHDN LOGIC INPUT VOLTAGE (V)
01
SUPPLY CURRENT (µA)
60
50
40
30
20
10
0
1981/82 G04
2
T
A
= 25°C
V
CC
= 3V
SHDN1 TIED
TO SHDN2
SHDN LOGIC INPUT VOLTAGE (V)
01
SUPPLY CURRENT (µA)
300
250
200
150
100
50
0
1981/82 G05
2
T
A
= 25°C
V
CC
= 5V
SHDN1 TIED
TO SHDN2
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OL
GDR Output Voltage Low I
SINK
= 100µA, V
CC
= 1.8V ● 0.05 0.4 V
GATE Drive Ready Trip Point GATE Voltage Rising
V
CC
= 1.8V ● 3.85 4.05 4.25 V
V
CC
= 2.7V ● 5.78 6.08 6.38 V
V
CC
= 3.3V ● 6.17 6.5 6.82 V
V
CC
= 5V ● 6.17 6.5 6.82 V
GDR Hysteresis GATE Voltage Falling 2 %
GDR Delay After GATE is Above the GDR Trip Threshold 2 µs
10k Pull-Up to V
CC
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All voltage values are with respect to GND.
Note 3: the LTC1982E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 4: Guaranteed by design not subject to test.
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V unless otherwise specified. C
GATE 1
= C
GATE 2
= C
GATE
= 1000pF.
(LTC1981 only)
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Supply Current vs Supply Voltage
GATE Drive Voltage vs Supply
Voltage
GATE Drive Current (LTC1982)
I
SUPPLY
I
SUPPLY
