LTC3803 Series

Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT

Part	Mounting Type	Package / Case	Supplier Device Package	Output Configuration	Operating Temperature [Min]	Operating Temperature [Max]	Topology	Number of Outputs	Duty Cycle (Max) [Max]	Control Features	Function	Output Type	Output Phases	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Frequency - Switching
Analog Devices Inc./Maxim Integrated LTC3803HS6#TRMPBF	Surface Mount	SOT-23-6 Thin TSOT-23-6	TSOT-23-6	Isolation Capable Positive	-40 °C	150 °C	Flyback	1	80 %	Current Limit Enable	Step-Up/Step-Down	Transistor Driver	1	8 V	5.7 V	200 kHz
Analog Devices Inc./Maxim Integrated LTC3803IS6-5#TRPBF	Surface Mount	SOT-23-6 Thin TSOT-23-6	TSOT-23-6	Isolation Capable Positive	-40 C	125 °C	Flyback	1	80 %	Current Limit Enable	Step-Up/Step-Down	Transistor Driver	1	8.1 V	4 V	200 kHz
Analog Devices Inc./Maxim Integrated LTC3803MPS6-3#TRPBF	Surface Mount	SOT-23-6 Thin TSOT-23-6	TSOT-23-6	Isolation Capable Positive	-55 °C	150 °C	Flyback	1	80 %	Current Limit Enable	Step-Up/Step-Down	Transistor Driver	1	8 V	5.7 V	300 kHz
Analog Devices Inc./Maxim Integrated LTC3803MPS6#TRPBF	Surface Mount	SOT-23-6 Thin TSOT-23-6	TSOT-23-6	Isolation Capable Positive	-55 °C	150 °C	Flyback	1	80 %	Current Limit Enable	Step-Up/Step-Down	Transistor Driver	1	8 V	5.7 V	200 kHz
Analog Devices Inc./Maxim Integrated LTC3803HS6-5#TRPBF	Surface Mount	SOT-23-6 Thin TSOT-23-6	TSOT-23-6	Isolation Capable Positive	-40 °C	150 °C	Flyback	1	80 %	Current Limit Enable	Step-Up/Step-Down	Transistor Driver	1	8.1 V	4 V	200 kHz
Analog Devices Inc./Maxim Integrated LTC3803IS6#TRMPBF	Surface Mount	SOT-23-6 Thin TSOT-23-6	TSOT-23-6	Isolation Capable Positive	-40 C	125 °C	Flyback	1	80 %	Current Limit Enable	Step-Up/Step-Down	Transistor Driver	1	8 V	5.7 V	200 kHz
Analog Devices Inc./Maxim Integrated LTC3803HS6#TRPBF	Surface Mount	SOT-23-6 Thin TSOT-23-6	TSOT-23-6	Isolation Capable Positive	-40 °C	150 °C	Flyback	1	80 %	Current Limit Enable	Step-Up/Step-Down	Transistor Driver	1	8 V	5.7 V	200 kHz
Analog Devices Inc./Maxim Integrated LTC3803MPS6-3#TRMPBF	Surface Mount	SOT-23-6 Thin TSOT-23-6	TSOT-23-6	Isolation Capable Positive	-55 °C	150 °C	Flyback	1	80 %	Current Limit Enable	Step-Up/Step-Down	Transistor Driver	1	8 V	5.7 V	300 kHz
Analog Devices Inc./Maxim Integrated LTC3803HS6-5#TRMPBF	Surface Mount	SOT-23-6 Thin TSOT-23-6	TSOT-23-6	Isolation Capable Positive	-40 °C	150 °C	Flyback	1	80 %	Current Limit Enable	Step-Up/Step-Down	Transistor Driver	1	8.1 V	4 V	200 kHz
Analog Devices Inc./Maxim Integrated LTC3803HS6-3#TRMPBF	Surface Mount	SOT-23-6 Thin TSOT-23-6	TSOT-23-6	Isolation Capable Positive	-40 °C	150 °C	Flyback	1	80 %	Current Limit Enable	Step-Up/Step-Down	Transistor Driver	1	8 V	5.7 V	300 kHz

Catalog

Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT

Description

The LTC3803 is a constant frequency current mode flyback controller optimized for driving N-channel MOSFETs in high input voltage applications. Constant frequency operation is maintained down to very light loads, resulting in less low frequency noise generation over a wide range of load currents. Slope compensation can be programmed with an external resistor.The LTC3803 provides ±1.5% output voltage accuracy and consumes only 240μA of quiescent current. Ground-referenced current sensing allows LTC3803-based converters to accept input supplies beyond the LTC3803’s absolute maximum VCC. A micropower hysteretic start-up feature allows efficient operation at high input voltages. For simplicity, the LTC3803 can also be powered from a high VINthrough a resistor, due to its internal shunt regulator. An internal undervoltage lockout shuts down the LTC3803 when the input voltage is too low to provide sufficient gate drive to the external MOSFET.The LTC3803 is available in a low profile (1mm) 6-lead SOT-23 (ThinSOT™) package.Turn On VoltageFrequencyLTC38038.7V200kHzLTC3803-38.7V300kHzLTC3803-54.8V200kHzApplicationsTelecom Power Supplies42V and 12V Automotive Power SuppliesAuxiliary/Housekeeping Power SuppliesPower Over Ethernet