LTC3803-3 Datasheet, PDF (2/16 Pages) Linear Technology – Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT

LTC3803-3
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V_CC to GND
Low Impedance Source .......................... – 0.3V to 8V
Current Fed ...................................... 25mA into V_CC*
NGATE Voltage ......................................... – 0.3V to V_CC
V_FB, I_TH/RUN Voltages ..............................– 0.3V to 3.5V
SENSE Voltage ........................................... – 0.3V to 1V
NGATE Peak Output Current (<10μs) ........................ 1A
Operating Temperature Range (Note 2)
LTC3803E-3 ....................................... – 40°C to 85°C
LTC3803I-3 ...................................... – 40°C to 125°C
Junction Temperature (Note 3) ............................ 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
*LTC3803-3 internal clamp circuit self regulates V_CC voltage to 9.5V.
PACKAGE/ORDER INFORMATION
TOP VIEW
I_TH/RUN 1
GND 2
V_FB 3
6 NGATE
5 V_CC
4 SENSE
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
T_JMAX = 125°C, θ_JA = 230°C/W
ORDER PART NUMBER S6 PART MARKING
LTC3803ES6-3
LTC3803IS6-3
LTCJS
LTCJT
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS _{The ● indicates specifications which apply over the full operating}
temperature range, otherwise specifications are at T_A = 25°C. V_CC = 8V, unless otherwise noted. (Note 2)
SYMBOL
V_TURNON
V_TURNOFF
PARAMETER
V_CC Turn On Voltage
V_CC Turn Off Voltage
V_HYST
V_CLAMP1mA
V_CLAMP25mA
V_MARGIN
I_CC
V_ITHSHDN
V_CC Hysteresis (V_TURNON – V_TURN0FF)
V_CC Shunt Regulator Voltage
V_CC Shunt Regulator Voltage
V_CLAMP1mA – V_TURNON Margin
Input DC Supply Current
Normal Operation
Start-Up
Shutdown Threshold (at I_TH/RUN)
I_ITHSTART
V_FB
Start-Up Current Source
Regulated Feedback Voltage (Note 5)
V_IMAX
Peak Current Sense Voltage
g_m
ΔV_O(LINE)
I_FB
f_OSC
Error Amplifier Transconductance
Output Voltage Line Regulation
V_FB Input Current
Oscillator Frequency
CONDITIONS
LTC3803E-3
LTC3803I-3
I_CC = 1mA, V_ITH/RUN = 0V
I_CC = 25mA, V_ITH/RUN = 0V
(Note 4)
V_ITH/RUN = 1.3V
V_CC = V_TURNON – 100mV
V_CC = V_TURNON – 100mV
LTC3803E-3
LTC3803I-3
V_ITH/RUN = 0V
0°C ≤ T_A ≤ 85°C
LTC3803E-3: –40°C ≤ T_A ≤ 85°C
LTC3803I-3: –40°C ≤ T_A ≤ 125°C
R_SL = 0 (Note 6)
LTC3803E-3
LTC3803I-3
I_TH/RUN Pin Load = ±5μA (Note 5)
V_TURNOFF < V_CC < V_CLAMP (Note 5)
(Note 5)
V_ITH/RUN = 1.3V
MIN
● 7.6
● 4.6
● 4.4
●1
● 8.3
● 8.4
● 0.05
● 0.15
● 0.10
0.2
0.788
● 0.780
● 0.780
● 90
● 85
200
270
TYP
8.7
5.7
5.7
3
9.4
9.5
0.6
240
40
0.28
0.28
0.3
0.800
0.800
0.800
100
100
333
0.05
10
300
MAX
9.2
7
7
10.3
10.5
350
90
0.45
0.45
0.4
0.812
0.812
0.820
115
115
500
50
330
UNITS
V
V
V
V
V
V
V
μA
μA
V
V
μA
V
V
V
V
V
μA/V
mV/V
nA
kHz
38033fa
2