LTC3374 Datasheet, PDF (6/24 Pages) Linear Technology – 8-Channel Parallelable 1A Buck DC/DCs

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