LTC3803-5_15 Datasheet, PDF (3/16 Pages) Linear Technology – Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT

LTC3803-5
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
junction temperature range, otherwise specifications are at T_A = 25°C. V_CC = 5V, unless otherwise noted. (Notes 2, 3)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_CLAMP25mA
V_CC Shunt Regulator Voltage at 25mA
I_CC = 25mA, V_ITH/RUN = 0V
LTC3803E-5
LTC3803I-5, LTC3803H-5
LTC3803MP-5
l 6.3
8.1 10.3
V
l 6.3
8.1 10.7
V
l
6
8.1 10.7
V
I_CC
I_CC,(UV)
Input DC Supply Current in
Normal Operation
Input DC Supply Current in
Undervoltage
(Note 4)
V_ITH/RUN = 1.3V
V_CC = V_TURNON – 100mV
LTC3803E-5
l
LTC3803I-5, LTC3803H-5, LTC3803MP-5 l
240
350
μA
40
90
μA
40
100
μA
V_ITHSHDN
I_ITHSTART
Shutdown Threshold (at I_TH/RUN)
V_CC > V_TURNON, V_ITH/RUN Falling
LTC3803E-5
LTC3803I-5, LTC3803H-5
LTC3803MP-5
l 0.12 0.28 0.45
V
l 0.08 0.28 0.45
V
l 0.08 0.28 0.47
V
Start-Up Current Source
V_ITH/RUN = 0V
LTC3803E-5
l 0.07 0.34
0.8
μA
LTC3803I-5, LTC3803H-5, LTC3803MP-5 l 0.07 0.34
1
μA
V_FB
g_m
ΔV_O(LINE)
ΔV_O(LOAD)
I_FB
f_OSC
DC_ON(MIN)
DC_ON(MAX)
t_RISE
t_FALL
V_IMAX
Regulated Feedback Voltage
Error Amplifier Transconductance
Output Voltage Line Regulation
Output Voltage Load Regulation
V_FB Input Current
Oscillator Frequency
Minimum Switch On Duty Cycle
Maximum Switch On Duty Cycle
Gate Drive Rise Time
Gate Drive Fall Time
Peak Current Sense Voltage
(Note 5)
LTC3803E-5:
0°C ≤ T_J ≤ 85°C
–40°C ≤ T_J ≤ 85°C
LTC3803I-5:
0°C ≤ T_J ≤ 85°C
–40°C ≤ T_J ≤ 125°C
LTC3803H-5:
0°C ≤ T_J ≤ 85°C
–40°C ≤ T_J ≤ 150°C
LTC3803MP-5:
0°C ≤ T_J ≤ 85°C
–55°C ≤ T_J ≤ 150°C
I_TH/RUN Pin Load = ±5μA (Note 5)
(Note 5)
I_TH/RUN Sinking 5μA (Note 5)
I_TH/RUN Sourcing 5μA (Note 5)
(Note 5)
V_ITH/RUN = 1.3V
V_ITH/RUN = 1.3V, V_FB = 0.8V
V_ITH/RUN = 1.3V, V_FB = 0.8V
C_LOAD = 3000pF
C_LOAD = 3000pF (Note 7)
R_SL = 0 (Note 6)
LTC3803E-5
LTC3803I-5, LTC3803H-5
LTC3803MP-5
0.788
l 0.780
0.788
l 0.780
0.788
l 0.780
0.788
l 0.780
200
170
70
0.800
0.800
0.800
0.800
0.800
0.800
0.800
0.800
333
0.1
3
3
10
200
6.5
80
40
40
0.812
0.816
0.812
0.820
0.812
0.820
0.812
0.820
500
50
230
8.5
90
V
V
V
V
V
V
V
V
μA/V
mV/V
mV/μA
mV/μA
nA
kHz
%
%
ns
ns
l 90
100
115
mV
l 85
100
115
mV
l 85
100
120
mV
I_SLMAX
Peak Slope Compensation Output
Current
(Note 7)
5
μA
t_SFST
Soft-Start Time
0.7
ms
38035fd
3