LTC3631 Linear Technology Corporation, LTC3631 Datasheet - Page 5

• Manufacturer Part Number: LTC3631
• Description: High Voltage 100mA Synchronous Step-Down Converter
• Manufacturer: Linear Technology Corporation

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TYPICAL PERFORMANCE CHARACTERISTICS
240
220
200
180
160
140
120
100
0.6
0.5
0.4
0.1
0.3
0.2
80
60
40
20
14
12
10
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
= 45V
= 10V
= 10V
ISET
200
–10
–10
TEMPERATURE (°C)
TEMPERATURE (°C)
400
20
20
SHUTDOWN
R
SLEEP
ISET
600
(kΩ)
50
50
SW = 45V
800
SW = 0V
80
80
1000
110
110
3631 G10
3631 G13
3631 G16
1200
1.300
1.250
1.200
1.150
1.100
1.050
1.000
2.5
2.0
1.0
250
225
200
175
150
125
100
4.5
4.0
3.5
3.0
1.5
0.5
75
50
25
0
0
–40
0
0
Peak Current Trip Threshold
vs Input Voltage
Switch On-Resistance
vs Input Voltage
RUN Comparator Thresholds
vs Temperature
5
–10
10
10
15
TEMPERATURE (°C)
INPUT VOLTAGE (V)
V
20
IN
R
20
I
20
I
SET
VOLTAGE (V)
SET
SET
BOTTOM
FALLING
RISING
TOP
25
= GND
= 500k
OPEN
50
30
30
35
80
40
40
110
45
3631 G14
3631 G17
3631 G11
50
50
100mA/DIV
INDUCTOR
50mV/DIV
CURRENT
VOLTAGE
VOLTAGE
OUTPUT
SWITCH
20V/DIV
14
12
10
5
4
1
8
6
2
0
3
2
0
4
–40
5
Quiescent Supply Current
vs Input Voltage
Switch On-Resistance
vs Temperature
Operating Waveforms
V
V
V
IN
OUT
IN
= 36V
= 10V
= 5V
–10
15
SLEEP
TEMPERATURE (°C)
SHUTDOWN
V
20
IN
20μs/DIV
VOLTAGE (V)
25
BOTTOM
LTC3631
TOP
50
35
80
110
45
3631 G12
3631 G15
3631 G18
3631fa
5