LTC3370_15 Datasheet, PDF (7/24 Pages) Linear Technology – 4-Channel 8A Configurable Buck DC/DCs

LTC3370
Typical Performance Characteristics T_A = 25°C, unless otherwise noted.
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_T (kΩ)
3370 G10
Enable Pin Precision Threshold
vs Temperature
405
400
EN RISING
395
390
385
380
EN FALLING
375
370
365
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3370 G13
V_OUT vs Temperature
1.88
FORCED CONTINUOUS MODE
1.86 ^ILOAD ^{= 0mA}
1.84
1.82
1.80
1.78
1.76
1.74
1.72
–55 –25
V_IN = 2.25V
V_IN = 3.3V
V_IN = 5.5V
5 35 65 95
TEMPERATURE (°C)
125 155
3370 G16
V_TEMP vs Temperature
1400
I_LOAD = 0mA
1200 V_CC = 3.3V
1000
800
600
ACTUAL V_TEMP
400
200
0
–200
–55
IDEAL V_TEMP
–25 5 35 65 95
TEMPERATURE (°C)
125 155
3370 G11
Buck V_IN Supply Current vs
Temperature
50
Burst Mode OPERATION
FB = 850mV
40
30
20
10
0
–55 –25
V_IN = 2.25V
V_IN = 3.3V
V_IN = 5.5V
5 35 65 95
TEMPERATURE (°C)
125 155
3370 G14
PMOS Current Limit vs
Temperature
2.6
V_IN = 3.3V
2.5
2.4
2.3
2.2
2.1
2.0
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3370 G17
For more information www.linear.com/LTC3370
Enable Threshold vs Temperature
900
ALL REGULATORS DISABLED
850
V_CC = 3.3V
800
750
EN RISING
700
650
600
550
500
450
400
EN FALLING
350
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3370 G12
Buck V_IN Supply Current vs
Temperature
550
FORCED CONTINUOUS MODE
500 _{FB = 0V}
450
400
350
300
250
200
150
100
50
0
–55 –25
V_IN = 2.25V
V_IN = 3.3V
V_IN = 5.5V
5 35 65 95
TEMPERATURE (°C)
125 155
3370 G15
PMOS R_DS(ON) vs Temperature
550
V_IN = 2.25V
500
V_IN = 3.3V
450
V_IN = 5.5V
400
350
300
250
200
150
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3370 G18
3370f
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