LTC3827 Datasheet, PDF (7/36 Pages) Linear Technology – Low IQ, Dual, 2-Phase Synchronous Step-Down Controller

TYPICAL PERFORMANCE CHARACTERISTICS
TRACK/SS Pull-Up Current
vs Temperature
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3827 G19
Sense Pins Total Input Current
vs Temperature
200
100
V_OUT = 10V
0
V_OUT = 3.3V
–100
–200
–300
–400
–500
–600
–700
V_OUT = OV
–800
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3827 G22
Undervoltage Lockout Threshold
vs Temperature
4.2
4.1
4.0
3.9
3.8
RISING
3.7
3.6
3.5
FALLING
3.4
3.3
3.2
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3827 G25
Shutdown (RUN) Threshold
vs Temperature
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3827 G20
Shutdown Current
vs Input Voltage
25
20
15
10
5
0
5 10 15 20 25 30 35
INPUT VOLTAGE (V)
3827 G23
Oscillator Frequency
vs Input Voltage
404
402
400
398
396
394
392
5
10 15 20 25 30 35
INPUT VOLTAGE (V)
3827 G26
LTC3827
Regulated Feedback Voltage
vs Temperature
808
806
804
802
800
798
796
794
792
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3827 G21
Oscillator Frequency
vs Temperature
800
700
600
V_PLLLPF = INTV_CC
500
400
V_PLLLPF = FLOAT
300
V_PLLLPF = GND
200
100
0
–45 –25
–5 15 35 55
TEMPERATURE (°C)
75 95
3827 G24
Shutdown Current
vs Temperature
12
10
8
6
4
2
0
–45 –30 –15 0 15 30 45 60 75 90
TEMPERATURE (°C)
3827 G27
3827ff
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