Datasheet

LTC4442/LTC4442-1
5
4442fb
TYPICAL PERFORMANCE CHARACTERISTICS
Undervoltage Lockout Threshold
Hysteresis vs Temperature
Switching Supply Current vs
Input Frequency
Propagation Delay vs V
LOGIC
Supply Voltage
Output High Voltage vs
V
CC
Supply Voltage
Rise and Fall Time vs
V
CC
Supply Voltage
TEMPERATURE (°C)
UVLO THRESHOLD HYSTERESIS (mV)
600
800
1000
4442 G10
400
200
500
700
900
300
100
0
–10–40 110
20
50
80
LTC4442-1
V
CC
UVLO
LTC4442
V
CC
UVLO
V
LOGIC
UVLO
FREQUENCY (Hz)
0
SUPPLY CURRENT (mA)
2
3
800k
4442 G11
1
0
200k
400k
600k
1M
4
I
VCC
I
BOOST
I
VLOGIC
NO LOAD
V
LOGIC
= 5V
V
CC
= BOOST-TS = 7V
Switching Supply Current vs
Load Capacitance
LOAD CAPACITANCE (nF)
0.1 0.3 3
0
SUPPLY CURRENT (mA)
1
10
100
11030
4442 G12
V
LOGIC
= 5V
V
CC
= BOOST-TS = 7V
I
CC
OR I
BOOST
f
IN
= 500kHz
I
CC
OR I
BOOST
f
IN
= 100kHz
I
LOGIC
f
IN
= 500kHz
V
LOGIC
SUPPLY VOLTAGE (V)
3
PROPAGATION DELAY (ns)
35
6
4442 G13
20
10
45 7
5
0
40
30
25
15
8910
NO LOAD
V
CC
= BOOST-TS = 7V
t
PLH(TG)
t
PHL(TG)
t
PLH(BG)
t
PHL(BG)
Propagation Delay vs
V
CC
Supply Voltage
V
CC
SUPPLY VOLTAGE (V)
4
35
30
25
20
15
10
5
0
79
4442 G14
56
810
PROPAGATION DELAY (ns)
NO LOAD
V
LOGIC
= 5V
BOOST-TS = V
CC
t
PLH(TG)
t
PHL(TG)
t
PLH(BG)
t
PHL(BG)
Propagation Delay vs Temperature
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
25
30
35
4442 G15
15
0
–40 –10 20 50 80
110
40
20
10
5
NO LOAD
V
LOGIC
= 5V
V
CC
= BOOST-TS = 7V
t
PLH(TG)
t
PHL(BG)
t
PHL(TG)
t
PLH(BG)
V
CC
SUPPLY VOLTAGE (V)
4
0
BG OR TG HIGH OUTPUT VOLTAGE (V)
2
4
6
5
6
78
4442 G16
9
8
10
1
3
5
7
9
10
BOOST-TS = V
CC
–100mA
–1mA
–10mA
V
CC
SUPPLY VOLTAGE (V)
4
0
RISE/FALL TIME (ns)
5
10
15
20
567
t
r(BG)
8
4442 G17
910
t
r(TG)
t
f(TG)
t
f(BG)
C
LOAD
= 3.3nF
BOOST-TS = V
CC
Rise and Fall Time vs
Load Capacitance
LOAD CAPACITANCE (nF)
13
1
RISE/FALL TIME (ns)
10
100
10 30
4442 G18
V
CC
= BOOST-TS = 7V
t
r(BG)
t
r(TG)
t
f(TG)
t
f(BG)