LTC3803ES6#TRMPBF Linear Technology, LTC3803ES6#TRMPBF Datasheet - Page 6

• Manufacturer Part Number: LTC3803ES6#TRMPBF
• Description: IC FLYBACK SYNC ADJ 1A TSOT23-6
• Manufacturer: Linear Technology
• Type: Flybackr

Specifications of LTC3803ES6#TRMPBF

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adjustable
• Current - Output: 1A
• Frequency - Switching: 200kHz
• Voltage - Input: Adjustable
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-6, TSOT-6
• Dc To Dc Converter Type: FLYBACK CONTROLLER
• Pin Count: 6
• Output Current: 1A
• Package Type: TSOT-23
• Mounting: Surface Mount
• Operating Temperature Classification: Automotive
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Compliant
• Other names: LTC3803ES6#PBF; LTC3803ES6#PBF

PIN FUNCTIONS
LTC3803
I
as the error amplifi er compensation point as well as the
run/shutdown control input. Nominal voltage range is 0.7V
to 1.9V. Forcing this pin below the shutdown threshold
(V
mode, the NGATE pin is held low.
GND (Pin 2): Ground Pin.
V
resistive divider across the output.
BLOCK DIAGRAM
6
TH
FB
ITHSHDN
/RUN (Pin 1): This pin performs two functions. It serves
(Pin 3): Receives the feedback voltage from an external
3
2
V
GND
FB
) causes the LTC3803 to shut down. In shutdown
REFERENCE
800mV
REGULATOR
–
+
SHUNT
CLAMP
START
SOFT-
V
CC
ERROR
AMPLIFIER
1.2V
5
V
CC
1
I
0.3μA
TH
/RUN
0.28V
20mV
–
–
+
+
SENSE (Pin 4): This pin performs two functions. It monitors
switch current by reading the voltage across an external
current sense resistor to ground. It also injects a current
ramp that develops slope compensation voltage across
an optional external programming resistor.
V
GND (Pin 2).
NGATE (Pin 6): Gate Drive for the External N-Channel
MOSFET. This pin swings from 0V to V
CC
SHUTDOWN
COMPARATOR
CURRENT
COMPARATOR
OSCILLATOR
(Pin 5): Supply Pin. Must be closely decoupled to
200kHz
R
S
Q
SWITCHING
LOGIC AND
BLANKING
CIRCUIT
CURRENT
SLOPE
SHUTDOWN
COMP
RAMP
V
CC
< V
TURNON
V
CC
UNDERVOLTAGE
GATE
DRIVER NGATE
CC
LOCKOUT
.
SENSE
3803 BD
6
4
3803fc