Datasheet

LTC4278
8
4278fc
TEMPERATURE (°C)
–50
UVLO (V)
1.240
1.245
1.250
25 75
4278 G23
1.235
1.230
–25 0
50 100 125
1.225
1.220
TEMPERATURE (°C)
–50
3.4
3.5
3.7
25 75
4278 G24
3.3
3.2
–25 0
50 100 125
3.1
3.0
3.6
I
UVLO
(µA)
TEMPERATURE (°C)
–50
SFST CHARGE CURRENT (µA)
23
25
4278 G25
20
18
–25 0 50
17
16
15
22
21
19
75 100 125
CAPACITANCE (nF)
0
TIME (ns)
80
70
60
50
40
30
20
10
0
8
4278 G26
2 4 6 1071 3 5 9
T
A
= 25°C
FALL TIME
RISE TIME
TYPICAL PERFORMANCE CHARACTERISTICS
UVLO vs Temperature I
UVLO
Hysteresis vs Temperature
Soft-Start Charge Current
vs Temperature
PG, SG Rise and Fall Times
vs Load Capacitance
TEMPERATURE (°C)
–50
I
VCMP
(µA)
60
65
70
25 75
4278 G20
55
50
–25 0
50 100 125
45
40
SOURCE CURRENT
V
FB
= 1.1V
SINK
CURRENT
V
FB
= 1.4V
TEMPERATURE (°C)
–50
900
g
m
(µmho)
950
1000
1050
1100
–25 0 25 50
4278 G21
75 100 125
Feedback Amplifier Source and
Sink Current vs Temperature
Feedback Amplifier g
m
vs Temperature
TEMPERATURE (°C)
–50
A
V
(V/V)
1550
25
4278 G22
1400
1300
–25 0 50
1250
1200
1150
1100
1600
1650
1700
1500
1450
1350
75 100 125
Feedback Amplifier Voltage Gain
vs Temperature