LTC3803-3 LINER [Linear Technology], LTC3803-3 Datasheet - Page 3

• Manufacturer Part Number: LTC3803-3
• Description: Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3803E-3 is guaranteed to meet specifications from 0°C to
85°C. Specifications over the – 40°C to 85°C operating temperature range
are assured by design, characterization and correlation with statistical
process controls. The LTC3803I-3 is guaranteed to meet performance
specifications over the –40°C to 125°C operating temperature range.
Note 3: T
dissipation P
SYMBOL
DC
DC
t
t
I
t
RISE
FALL
SLMAX
SFST
ON(MIN)
ON(MAX)
T
J
= T
J
A
is calculated from the ambient temperature T
+ (P
D
according to the following formula:
PARAMETER
Minimum Switch On Duty Cycle
Maximum Switch On Duty Cycle
Gate Drive Rise Time
Gate Drive Fall Time
Peak Slope Compensation Output Current
Soft-Start Time
D
• 230°C/W).
A
and power
A
CONDITIONS
V
V
C
C
(Note 7)
= 25°C. V
ITH/RUN
ITH/RUN
LOAD
LOAD
The
= 3000pF
= 3000pF (Note 7)
= 1.3V, V
= 1.3V, V
●
CC
indicates specifications which apply over the full operating
= 8V, unless otherwise noted. (Note 2)
FB
FB
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: The LTC3803-3 is tested in a feedback loop that servos V
output of the error amplifier while maintaing I
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 (R
details, refer to the programmable slope compensation feature in the
Applications Information section.
Note 7: Guaranteed by design.
= 0.8V
= 0.8V
MIN
70
TH
TYP
1.4
80
40
40
8
5
/RUN at the midpoint of
LTC3803-3
MAX
9.6
90
SL
FB
). For
to the
UNITS
38033fa
3
ms
μA
ns
ns
%
%