LTC3632 LINER [Linear Technology], LTC3632 Datasheet - Page 5

• Manufacturer Part Number: LTC3632
• Description: High Effi ciency, High Voltage 20mA Synchronous Step-Down Converter
• Manufacturer: LINER [Linear Technology]

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