Datasheet

LTC4449
4
4449fa
TYPICAL PERFORMANCE CHARACTERISTICS
Input Thresholds
vs V
LOGIC
Supply Voltage
Input Thresholds for V
LOGIC
= 3.3V
vs Temperature
BG or TG Input Threshold Hysteresis
vs V
LOGIC
Supply Voltage
V
LOGIC
Undervoltage Lockout
Thresholds vs Temperature
Undervoltage Lockout Threshold
Hysteresis vs Temperature
Input Thresholds for V
LOGIC
≥ 5V
vs Temperature
Quiescent Supply Current
vs Supply Voltage
V
CC
Undervoltage Lockout
Thresholds vs Temperature
BG or TG Input Threshold Hysteresis
vs Temperature
V
LOGIC
SUPPLY (V)
3.0 3.5
0
INPUT THRESHOLD (V)
1.0
4.0
4.0
5.0
5.5
4449 G01
0.5
2.0
2.5
3.0
3.5
1.5
4.5
6.0
6.5
V
IH(TG)
V
IL(TG)
V
IL(BG)
V
IH(BG)
TEMPERATURE (°C)
INPUT THRESHOLD (V)
1.0
2.0
3.0
0.5
1.5
2.5
–10 20 50 80
4449 G02
110–40
V
IH(TG)
V
LOGIC
= 3.3V
V
IL(TG)
V
IL(BG)
V
IH(BG)
TEMPERATURE (°C)
INPUT THRESHOLD (V)
3
4
5
4449 G03
2
1
0
–10–40 110
20
50
80
V
IH(TG)
V
LOGIC
≥ 5V
V
IL(TG)
V
IL(BG)
V
IH(BG)
V
LOGIC
SUPPLY (V)
3.0 3.5
0
BG OR TG INPUT THRESHOLD HYSTERESIS (V)
0.10
0.35
4.0
5.0
5.5
4449 G04
0.05
0.20
0.25
0.30
0.15
4.5
6.0
6.5
TEMPERATURE (°C)
BG OR TG INPUT THRESHOLD HYSTERESIS (V)
0.25
0.30
0.35
4449 G05
0.15
0
–40 –10 20 50 80
110
0.40
0.20
0.10
0.05
V
LOGIC
= 5V
V
LOGIC
= 3.3V
SUPPLY VOLTAGE (V)
3.0
0
SUPPLY CURRENT (mA)
0.1
0.3
0.4
0.5
1.0
0.7
4.0
5.0
5.5
4449 G06
0.2
0.8
0.9
0.6
3.5
4.5
6.0
6.5 7.0
IN FLOATING
TS = GND
I
VLOGIC
I
BOOST
I
VCC
TEMPERATURE (°C)
V
LOGIC
UVLO THRESHOLD (V)
2.8
2.9
4449 G08
2.7
2.6
2.5
–10–40 110
20
50
80
RISING THRESHOLD
FALLING THRESHOLD
TEMPERATURE (°C)
V
CC
UVLO THRESHOLD (V)
3.2
3.3
4449 G09a
3.1
3.0
2.9
–10–40 110
20
50
80
RISING THRESHOLD
FALLING THRESHOLD
TEMPERATURE (°C)
UVLO THRESHOLD HYSTERESIS (V)
150
250
200
4449 G09b
100
50
0
–10–40 110
20
50
80
V
CC
UVLO
V
LOGIC
UVLO