Datasheet

LTC3632
5
3632fc
TYPICAL PERFORMANCE CHARACTERISTICS
Peak Current Trip Threshold
vs R
ISET
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
Operating Waveforms
Peak Current Trip Threshold
vs Input Voltage
R
ISET
(kΩ)
0
0
PEAK CURRENT TRIP THRESHOLD (mA)
10
20
30
40
60
200
400 600 800
3632 G10
1000 1200
50
V
IN
= 10V
INPUT VOLTAGE (V)
0
PEAK CURRENT TRIP THRESHOLD (mA)
20
40
60
10
30
50
10 20 30 40
3632 G11
5050 15 25 35 45
I
SET
OPEN
I
SET
= GND
R
SET
= 500k
V
IN
= 10V
INPUT VOLTAGE (V)
5
10
12
14
SLEEP
45
3632 G12
8
6
15 25 35
4
2
0
V
IN
SUPPLY CURRENT (µA)
SHUTDOWN
TEMPERATURE (°C)
–40
10
12
14
SLEEP
110
3632 G13
8
6
–10 20 50 80
4
2
0
V
IN
SUPPLY CURRENT (µA)
SHUTDOWN
V
IN
= 10V
INPUT VOLTAGE (V)
0
6
7
8
40
3632 G14
5
4
10 20
TOP
BOTTOM
30 50
3
2
1
SWITCH ON-RESISTANCE (Ω)
TEMPERATURE (°C)
SWITCH ON-RESISTANCE (Ω)
5
6
7
3632 G15
3
0
–40 –10 20 50 80 110
8
4
2
1
V
IN
= 10V
TOP
BOTTOM
RUN Comparator Threshold
Voltage vs Temperature
TEMPERATURE (°C)
0
SWITCH LEAKAGE CURRENT (µA)
0.10
0.20
0.30
0.05
0.15
0.25
–10 20 50
3632 G16
–40 80 110
SW = 0V
SW = 50V
V
IN
= 50V
TEMPERATURE (°C)
–40
1.00
RUN COMPARATOR THRESHOLD (V)
1.05
1.10
1.15
1.20
1.30
–10
20 50 80
3632 G17
110
1.25
RISING
FALLING
SWITCH
VOLTAGE
20V/DIV
OUTPUT
VOLTAGE
100mV/DIV
INDUCTOR
CURRENT
50mA/DIV
20µs/DIVV
IN
= 48V
V
OUT
= 5V
I
LOAD
= 10mA
3632 G18
T
A
= 25°C, unless otherwise noted.