Datasheet

LTC4449
5
4449fa
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current
vs Input Frequency
Propagation Delay
vs V
LOGIC
Supply Voltage
Propagation Delay
vs V
CC
(Boost) Supply Voltage
Rise and Fall Time
vs V
CC
(Boost) Supply Voltage
Switching Supply Current
vs Load Capacitance
Rise and Fall Time
vs Load Capacitance
Propagation Delay
vs Temperature
FREQUENCY (Hz)
0
5
6
800k
4449 G12
4
3
200k 400k 600k 1M
2
1
0
SUPPLY CURRENT (mA)
NO LOAD
V
LOGIC
= V
CC
= 5V
TS = GND
I
VCC
I
VLOGIC
LOAD CAPACITANCE (nF)
0.1
SUPPLY CURRENT (mA)
1
10
100
4449 G13
31030
V
LOGIC
= V
CC
= 5V
TS = GND
I
CC
f
IN
= 500kHz
I
CC
f
IN
= 100kHz
I
LOGIC
f
IN
= 500kHz
1
V
CC
(BOOST) SUPPLY VOLTAGE (V)
3.5
15
10
5
0
5.0 6.0
4449 G14
4.0 4.5
5.5 6.5
RISE/FALL TIME (ns)
C
LOAD
= 3.3nF
TS = GND
t
r(TG)
t
r(BG)
t
f(TG)
t
f(BG)
LOAD CAPACITANCE (nF)
3
1
RISE/FALL TIME (ns)
10
100
10 30
4449 G15
V
CC
= 5V
TS = GND
t
r(BG)
t
r(TG)
t
f(TG)
1
t
f(BG)
V
LOGIC
SUPPLY VOLTAGE (V)
3.53.0
25
15
20
10
5
5.0 6.0
4449 G16
4.0 4.5
5.5 6.5
PROPAGATION DLEAY (ns)
NO LOAD
V
CC
= BOOST = 5V
TS = GND
t
pHL(TG)
t
pLH(BG)
t
pLH(TG)
t
pHL(BG)
V
CC
(BOOST) SUPPLY VOLTAGE (V)
20
15
10
5
5.0 6.0
4449 G17
4.0 4.5
5.5 6.5
PROPAGATION DLEAY (ns)
NO LOAD
V
LOGIC
= 5V
TS = GND
t
pHL(TG)
t
pLH(BG)
t
pLH(TG)
t
pHL(BG)
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
4449 G18
15
0
–40 –10 20 50 80
110
25
20
10
5
NO LOAD
V
CC
= V
LOGIC
= 5V
TS = GND
t
pHL(TG)
t
pLH(BG)
t
pLH(TG)
t
pHL(BG)