LTC3374
TYPICAL PERFORMANCE CHARACTERISTICS
VCC Undervoltage Threshold
vs Temperature
Buck VIN Undervoltage Threshold
vs Temperature
VCC Supply Current
vs Temperature
2.70
2.65
2.60
2.55
2.50
2.45
2.40
2.35
2.30
2.30
2.25
2.20
2.15
2.10
2.05
2.00
1.95
1.90
60
55
50
ALL REGULATORS
IN SHUTDOWN
45
40
35
V
RISING
V
RISING
CC
IN
30
25
20
15
10
5
V
FALLING
V
FALLING
CC
IN
V
V
= 5.5V
= 2.7V
V
= 3.3V
CC
CC
CC
0
50 75
–50 –25
0
25
100 125 150
50 75
50 75
25
TEMPERATURE (°C)
–50 –25
0
25
100 125 150
–50 –25
0
100 125 150
TEMPERATURE (°C)
TEMPERATURE (°C)
3374 G01
3374 G02
3374 G03
VCC Supply Current
vs Temperature
VCC Supply Current
vs Temperature
RT Programmed Oscillator
Frequency vs Temperature
125
100
75
50
25
0
400
2.20
2.15
2.10
2.05
2.00
1.95
1.90
1.85
1.80
AT LEAST ONE BUCK ENABLED
SYNC = 0V
FB = 850mV
AT LEAST ONE BUCK ENABLED
360 SYNC = 2MHz
R
= 402k
RT
320
280
240
200
160
120
80
V
V
= 5.5V
= 3.3V
CC
CC
V
V
= 5.5V
= 2.7V
CC
CC
V
= 3.3V
CC
V
= 2.7V
CC
V
CC
V
CC
V
CC
= 5.5V
= 3.3V
= 2.7V
40
0
50 75
–50 –25
0
25 50 75 100 125 150
TEMPERATURE (°C)
3374 G05
–50 –25
0
25
100 125 150
–25
50 75
TEMPERATURE (°C)
–50
0
25
100 125
150
TEMPERATURE (°C)
3374 G04
3374 G06
Default Oscillator Frequency
vs Temperature
Oscillator Frequency vs VCC
2.20
2.15
2.10
2.05
2.00
1.95
1.90
1.85
1.80
2.20
2.15
2.10
2.05
2.00
1.95
1.90
1.85
1.80
V
= V
CC
RT
V
= V
CC
RT
R
= 402k
RT
V
CC
V
CC
V
CC
= 5.5V
= 3.3V
= 2.7V
50 75
TEMPERATURE (°C)
4.3 4.7
(V)
–50 –25
0
25
100 125 150
2.7 3.1 3.5 3.9
5.1 5.5
V
CC
3374 G07
3374 G08
3374f
6
For more information www.linear.com/LTC3374