LTC3803-3 Datasheet, PDF (4/16 Pages) Linear Technology – Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT

LTC3803-3
TYPICAL PERFOR A CE CHARACTERISTICS T_A = 25°C unless otherwise noted.
Reference Voltage vs Temperature
812
V_CC = 8V
808
804
800
796
792
788
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
38033 G01
Oscillator Frequency
vs Temperature
330
V_CC = 8V
320
310
300
290
280
270
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
38033 G04
Reference Voltage
vs Supply Voltage
801.0
V_CC ≤ V_CLAMP1mA
800.8
800.6
800.4
800.2
800.0
799.8
799.6
799.4
799.2
799.0
6
6.5 7 7.5 8 8.5
V_CC SUPPLY VOLTAGE (V)
9 9.5
38033 F02
Oscillator Frequency
vs Supply Voltage
330
320
310
300
290
280
270
6
6.5 7 7.5 8 8.5 9
V_CC SUPPLY VOLTAGE (V)
38033 G05
Reference Voltage
vs V_CC Shunt Regulator Current
804
803
802
801
800
799
798
797
796
0
5
10
15
20
25
I_CC (mA)
38033 G03
Oscillator Frequency
vs V_CC Shunt Regulator Current
330
320
310
300
290
280
270
0
5 10 15 20 25 30 35
I_CC (mA)
38033 G06
V_CC Undervoltage Lockout
Thresholds vs Temperature
10.0
9.5
9.0
V_TURNON
8.5
8.0
7.5
7.0
6.5
6.0
V_TURNOFF
5.5
5.0
4.5
–50 –30 –10 10 30 50 80 90 110 130
TEMPERATURE (°C)
38033 G07
4
V_CC Shunt Regulator Voltage
vs Temperature
10.0
9.9
9.8
9.7
I_CC = 25mA
9.6
9.5
9.4
I_CC = 1mA
9.3
9.2
9.1
9.0
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
38033 G08
I_CC Supply Current
vs Temperature
350
V_CC = 8V
325 ^VITH/RUN ^{= 1.3V}
300
275
250
225
200
175
150
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (°C)
38033 G09
38033fa