Datasheet

LTC3631
5
3631fe
For more information www.linear.com/LTC3631
Typical perForMance characTerisTics
Peak Current Trip Threshold
vs R
ISET
Peak Current Trip Threshold
vs Input Voltage
Quiescent Supply Current
vs Input Voltage
Quiescent Supply Current
vs Temperature
Switch On-Resistance
vs Input Voltage
Switch On-Resistance
vs Temperature
Switch Leakage Current
vs Temperature
RUN Comparator Threshold
Voltages vs Temperature Operating Waveforms
R
ISET
(kΩ)
0
20
PEAK CURRENT TRIP THRESHOLD (mA)
60
100
140
180
400 800200 600 1000
3631 G10
1200
220
40
80
120
160
200
240
V
IN
= 10V
INPUT VOLTAGE (V)
0
PEAK CURRENT TRIP THRESHOLD (mA)
150
200
250
40
3631 G11
100
50
125
175
225
75
25
0
10
20
30
5 45
15
25
35
50
I
SET
OPEN
R
SET
= 500k
I
SET
= GND
INPUT VOLTAGE (V)
5
10
12
14
SLEEP
45
3631 G12
8
6
15 25 35
4
2
0
V
IN
SUPPLY CURRENT (µA)
SHUTDOWN
TEMPERATURE (°C)
–40
10
12
14
80
3631 G13
8
6
–10 20 50 110
4
2
0
V
IN
SUPPLY CURRENT (µA)
V
IN
= 10V
SLEEP
SHUTDOWN
INPUT VOLTAGE (V)
0
0
SWITCH ON-RESISTANCE (Ω)
0.5
1.5
2.0
2.5
20
40
50
4.5
3631 G14
1.0
10 30
TOP
BOTTOM
3.0
3.5
4.0
TEMPERATURE (°C)
–40
SWITCH 0N-RESISTANCE (Ω)
3
4
5
3631 G15
2
1
0
–10
20
50 80 110
V
IN
= 10V
TOP
BOTTOM
TEMPERATURE (°C)
–40
SWITCH LEAKAGE CURRENT (µA)
0.3
0.4
0.6
0.5
3631 G16
0.2
0.1
0
–10
20
50 80 110
V
IN
= 45V
SW = 0V
SW = 45V
TEMPERATURE (°C)
–40
1.000
RUN COMPARATOR THRESHOLD (V)
1.050
1.100
1.150
1.200
1.250
1.300
–10 20 50 80
3631 G17
110
RISING
FALLING
SWITCH
VOLTAGE
20V/DIV
OUTPUT
VOLTAGE
50mV/DIV
INDUCTOR
CURRENT
100mA/DIV
20µs/DIVV
IN
= 36V
V
OUT
= 5V
I
LOAD
= 35mA
3631 G18