Datasheet
LTC4444
4
4444fb
TYPICAL PERFORMANCE CHARACTERISTICS
V
CC
Supply Quiescent Current
vs Voltage
BOOST-TS Supply Quiescent
Current vs Voltage
V
CC
Supply Current
vs Temperature
Boost Supply Current
vs Temperature
Output Low Voltage (V
OL
)
vs Supply Voltage
Output High Voltage (V
OH
)
vs Supply Voltage
Input Thresholds (TINP, BINP)
vs Supply Voltage
Input Thresholds (TINP, BINP)
vs Temperature
Input Thresholds (TINP, BINP)
Hysteresis vs Voltage
V
CC
SUPPLY VOLTAGE (V)
0
0
QUIESCENT CURRENT (µA)
50
150
200
250
6 7 8 9 10 11 12 13
450
4444 G01
100
12345 14
300
350
400
TINP = BINP = 0V
TINP(BINP) = 12V
T
A
= 25°C
BOOST = 12V
TS = GND
BOOST SUPPLY VOLTAGE (V)
0
0
QUIESCENT CURRENT (µA)
50
150
200
250
6 7 8 9 10 11 12 13
400
4444 G02
100
12345 14
300
350
TINP = BINP = 0V
TINP = 0V, BINP = 12V
TINP = 12V, BINP = 0V
T
A
= 25°C
V
CC
= 12V
TS = GND
TEMPERATURE (°C)
V
CC
SUPPLY CURRENT (µA)
350
360
370
4444 G03
330
300
–55 –25 5 35 65 95 125 150
380
340
320
310
TINP = BINP = 0V
V
CC
= BOOST = 12V
TS = GND
TINP(BINP) = 12V
TEMPERATURE (°C)
BOOST SUPPLY CURRENT (µA)
250
300
350
4444 G04
150
0
400
200
100
50
TINP = 12V
BINP = 0V
TINP = 0V
BINP = 12V
TINP = BINP = 0V
V
CC
= BOOST = 12V
TS = GND
–55 –25 5 35 65 95 125 150
SUPPLY VOLTAGE (V)
7
OUTPUT VOLTAGE (mV)
140
10
4444 G05
80
40
89 11
20
0
160
120
100
60
12 13 14
V
OL(TG)
V
OL(BG)
T
A
= 25°C
I
TG(BG)
= 100mA
BOOST = V
CC
TS = GND
SUPPLY VOLTAGE (V)
7
5
TG OR BG OUTPUT VOLTAGE (V)
6
8
9
10
15
12
9
11
12
4444 G06
7
13
–1mA
14
11
8
10
13
14
T
A
= 25°C
BOOST = V
CC
TS = GND
–10mA
–100mA
SUPPLY VOLTAGE (V)
7
2.1
TG OR BG INPUT THRESHOLD (V)
2.2
2.4
2.5
2.6
3.1
2.8
9
11
12
4444 G07
2.3
2.9
3.0
2.7
8
10
13
14
T
A
= 25°C
BOOST = V
CC
TS = GND
V
IH(TG,BG)
V
IL(TG,BG?)
SUPPLY VOLTAGE (V)
78
375
TG OR BG INPUT THRESHOLD HYSTERESIS (mV)
425
500
9
11
12
4444 G09
400
475
450
10
13
14
T
A
= 25°C
V
CC
= BOOST = 12V
TS = GND
–55 –25 5 35 65 95 125 150
TEMPERATURE (°C)
TG OR BG INPUT THRESHOLD (V)
2.6
2.8
3.0
4444 G08
2.4
2.2
2.5
2.7
2.9
2.3
2.1
2.0
V
CC
= BOOST = 12V
TS = GND
V
IH(TG,BG)
V
IL(TG,BG)