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LTC3803 Datasheet(PDF) 3 Page - Linear Technology

Part # LTC3803
Description  Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT
PDF  12 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3803 Datasheet(HTML) 3 Page - Linear Technology

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LTC3803
3803i
ELECTRICAL CHARACTERISTICS
TJ = TA + (PD • 230°C/W).
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: The LTC3803 is tested in a feedback loop that servos V
FB to the
output of the error amplifier while maintaing ITH/RUN at the midpoint of
the current limit range.
Note 6: Peak current sense voltage is reduced dependent on duty cycle
and an optional external resistor in series with the SENSE pin (RSL). For
details, refer to the programmable slope compensation feature in the
Applications Information section.
Note 7: Guaranteed by design.
TYPICAL PERFOR A CE CHARACTERISTICS
Reference Voltage
vs VCC Shunt Regulator Current
TEMPERATURE (
°C)
–50
799.0
799.5
800.0
70
90
3803 G01
798.5
798.0
–10
10
–30
30
50
110
797.5
797.0
800.5
VCC = 8V
VCC SUPPLY VOLTAGE (V)
6
799.0
799.2
799.6
799.8
800.0
801.0
800.4
7
8
8.5
3803 F02
799.4
800.6
800.8
800.2
6.5
7.5
9
9.5
TA = 25°C
VCC ≤ VCLAMP1mA
ICC (mA)
0
799
800
801
15
25
3803 G03
798
797
796
510
20
802
803
804
TA = 25°C
Reference Voltage
vs Supply Voltage
Reference Voltage vs Temperature
Oscillator Frequency
vs VCC Shunt Regulator Current
Oscillator Frequency
vs Supply Voltage
Oscillator Frequency
vs Temperature
TEMPERATURE (
°C)
–50
180
185
190
195
200
–10
30
70
110
3803 G04
205
210
–30
10
50
90
VCC = 8V
VCC SUPPLY VOLTAGE (V)
6
190
194
198
202
6.5
7
7.5
8
3803 G05
8.5
206
210
192
196
200
204
208
9
TA = 25°C
ICC (mA)
0
190
194
198
202
5
10
15
20
3803 G06
206
210
192
196
200
204
208
25
TA = 25°C



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