LTC3637_15 Datasheet, PDF (5/26 Pages) Linear Technology – 76V, 1A Step-Down Regulator

TYPICAL PERFORMANCE CHARACTERISTICS
LTC3637
Feedback Comparator Trip
Voltage vs Temperature
0.804
V_IN = 12V
0.802
0.800
0.798
0.796
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3637 G07
Peak Current Trip Threshold
vs R_ISET
2800
V_IN = 12V
2400
2000
1600
1200
800
400
0
0
50 100 150 200 250
R_ISET (kΩ)
3637 G10
Quiescent V_IN Supply Current
vs Input Voltage
20
16
SLEEP
12
8
SHUTDOWN
4
0
5 15 25 35 45 55 65 75
INPUT VOLTAGE (V)
3637 G13
Feedback Comparator Hysteresis
vs Temperature
5.5
V_IN = 12V
5.4
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
–55 –25
5 35 65 95 125 155
TEMPERATURE (°C)
3637 G08
Peak Current Trip Threshold
vs Temperature
2800
V_IN = 12V
2400
ISET OPEN
2000
1600
1200
R_ISET = 100k
800
400
ISET = GND
0
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3637 G11
Quiescent V_IN Supply Current
vs Temperature
30
V_IN = 12V
25
20
15
SLEEP
10
5
SHUTDOWN
0
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3637 G14
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RUN and OVLO Comparator
Threshold Voltages vs Temperature
1.24
1.22
RISING
1.20
1.18
1.16
1.14
1.12
FALLING
1.10
1.08
1.06
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3637 G09
Peak Current Trip Threshold
vs Input Voltage
2800
2400
ISET OPEN
2000
1600
1200
R_ISET = 100k
800
400
ISET = 0V
0
0 10 20 30 40 50 60 70
INPUT VOLTAGE (V)
3637 G12
UVLO Threshold Voltages
vs Temperature
3.70
RISING
3.65
3.60
3.55
FALLING
3.50
3.45
–55 –25
5 35 65 95
TEMPERATURE (°C)
125 155
3637 G15
3637fa
5