LTC3803-5 Datasheet, PDF (4/12 Pages) Linear Technology – Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT

LTC3803-5
TYPICAL PERFOR A CE CHARACTERISTICS
Reference Voltage vs Temperature
812
V_CC = 5V
808
804
800
796
792
788
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
38035 G01
Oscillator Frequency
vs Temperature
220
V_CC = 5V
215
210
205
200
195
190
185
180
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
38035 G04
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
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
3803 G07
4
Reference Voltage
vs Supply Voltage
812
T_A = 25°C
V_CC ≤ V_CLAMP1mA
808
804
800
796
792
788
4.0
4.5 5.0 5.5 6.0 6.5 7.0 7.5
V_CC SUPPLY VOLTAGE (V)
38035 F02
Oscillator Frequency
vs Supply Voltage
220 _{TA = 25°C}
215
210
205
200
195
190
185
180
4.0
4.5 5.0 5.5 6.0 6.5 7.0 7.5
V_CC SUPPLY VOLTAGE (V)
38035 G05
V_CC Shunt Regulator Voltage
vs Temperature
10.5
10.0
9.5
9.0
I_CC = 25mA
8.5
I_CC = 1mA
8.0
7.5
7.0
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
38035 G08
Reference Voltage
vs V_CC Shunt Regulator Current
812
T_A = 25°C
808
804
800
796
792
788
0
5
10
15
20
25
I_CC (mA)
38035 G03
Oscillator Frequency
vs V_CC Shunt Regulator Current
220 _{TA = 25°C}
215
210
205
200
195
190
185
180
0
5
10
15
20
25
I_CC (mA)
38035 G06
I_CC Supply Current
vs Temperature
300
V_CC = 5V
V_ITH/RUN = 1.3V
280
260
240
220
200
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
38035 G08
38035f