ltc3873 Linear Technology Corporation, ltc3873 Datasheet - Page 4

• Manufacturer Part Number: ltc3873
• Description: No Rsense Constant Frequency Current Mode Boost/flyback/sepic Dc/dc Controller
• Manufacturer: Linear Technology Corporation

LTC3873
TYPICAL PERFORMANCE CHARACTERISTICS
4
70
65
60
55
50
45
40
35
30
25
20
3
Shutdown Mode I
4
5
250
230
190
170
150
1.0
0.9
0.7
0.5
210
0.8
0.6
6
V
–60
IN
–60
Frequency vs Temperature
RUN Threshold vs Temperature
Q
(V)
7
vs V
–40 –20
–40 –20
IN
8
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
9
3873 G04
20
20
FALLING
RISING
10
40
40
60
60
80 100
80
80
70
60
50
40
30
20
10
0
–60
Shutdown I
100
3873 G07
3873 G09
–40
120
120
–20
TEMPERATURE (°C)
Q
0
vs Temperature
20
40
60
80
10.2
10.1
10.0
300
250
200
150
100
9.9
9.8
9.7
9.6
9.5
9.4
9.3
9.2
50
0
100
–60
&% / #
0
Maximum Sense Threshold
vs Temperature
Shunt Regulation Voltage
vs I
120
–40
5
SHUNT
–20
10
TEMPERATURE (°C)
15
0
100
90
80
70
60
50
40
30
20
10
I
IPRG = GND
0
SHUNT
IPRG = FLOAT
20
20
0
Gate Drive Rise and Fall Time
vs C
IPRG = V
(mA)
25
40
LOAD
2000
30
60
IN
35
80
RISE TIME
4000
C
100
LOAD
40
3873 G08
3873 G10
120
45
(pF)
6000
FALL TIME
8000
3873 G07
10000
3873f