LTC3374 Datasheet, PDF (7/24 Pages) Linear Technology – 8-Channel Parallelable 1A Buck DC/DCs

TYPICAL PERFORMANCE CHARACTERISTICS
LTC3374
Oscillator Frequency vs R_T
4.0
V_CC = 3.3V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
250 300 350 400 450 500 550 600 650 700 750 800
R_RT (kΩ)
3374 G09
V_TEMP vs Temperature
1400
1200
1000
800
600
400 ACTUAL VTEMP
200
0
IDEAL V_TEMP
–200
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
3374 G10
Enable Threshold vs Temperature
900
ALL REGULATORS DISABLED
850 _{VCC = 3.3V}
800
750
EN RISING
700
650
EN FALLING
600
550
500
450
400
–50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3374 G11
Enable Pin Precision Threshold
vs Temperature
420
415
410
405
EN RISING
400
EN FALLING
395
390
385
380
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3374 G12
Buck V_IN Supply Current
vs Temperature
50 _{Burst Mode OPERATION}
FB = 850mV
40
30
V_IN = 5.5V
20
V_IN = 2.25V
V_IN = 3.3V
10
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3374 G13
Buck V_IN Supply Current
vs Temperature
550 _{FORCED CONTINUOUS MODE}
500 _{FB = 0V}
450
V_IN = 5.5V
400
V_IN = 3.3V
350
V_IN = 2.25V
300
250
200
150
100
50
0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3374 G14
V_OUT vs Temperature
1.88 _{FORCED CONTINUOUS MODE}
1.86 ^{LOAD = 0mA}
1.84
1.82
V_IN = 5.5V
1.80
V_IN = 2.25V
1.78
V_IN = 3.3V
1.76
1.74
1.72
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3374 G15
PMOS Current Limit
vs Temperature
2.6
V_IN = 3.3V
2.5
2.4
2.3
2.2
2.1
2.0
–50 –25
0 25 50 75 100 125 150
TEMPERATURE (°C)
3374 G16
3374f
For more information www.linear.com/LTC3374
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