LTC3803-5_15 Datasheet, PDF (5/16 Pages) Linear Technology – Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT

TYPICAL PERFORMANCE CHARACTERISTICS
LTC3803-5
V_CC Undervoltage Lockout
Thresholds vs Temperature
6.0
5.5
5.0
V_TURNON
4.5
4.0
V_TURNOFF
3.5
3.0
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
38035 G07
V_CC Shunt Regulator Voltage
vs Temperature
10.5
10.0
9.5
9.0
I_CC = 25mA
8.5
8.0
I_CC = 1mA
7.5
7.0
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
38035 G08
I_CC Supply Current
vs Temperature
300
V_CC = 5V
V_ITH/RUN = 1.3V
280
260
240
220
200
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
38035 G09
Start-Up I_CC Supply Current
vs Temperature
70
V_CC = V_TURNON – 0.1V
60
50
40
30
20
10
0
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
38035 G10
I_TH/RUN Shutdown Threshold
vs Temperature
500
450
400
350
300
250
200
150
100
50
0
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
38035 G11
I_TH/RUN Start-Up Current Source
vs Temperature
1000
V_CC = V_TURNON + 0.1V
900 V_ITH/RUN = 0V
800
700
600
500
400
300
200
100
0
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
38035 G12
Peak Current Sense Voltage
vs Temperature
120 _{VCC = 5V}
115
110
105
100
95
90
85
80
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
38035 G13
Soft-Start Time vs Temperature
1.4
V_CC = 5V
1.2
1.0
0.8
0.6
0.4
0.2
0
–60 –30
0 30 60 90
TEMPERATURE (°C)
120 150
38035 G14
38035fd
5