LTC3803IS6#TRMPBF

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Analog Devices Inc./Maxim Integrated

CONSTANT FREQUENCY CURRENT MODE FLYBACK DC/DC CONTROLLER IN THINSOT

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LTC3803IS6#TRMPBF

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Analog Devices Inc./Maxim Integrated

CONSTANT FREQUENCY CURRENT MODE FLYBACK DC/DC CONTROLLER IN THINSOT

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC3803 Series

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

Technical Specifications

Parameters and characteristics for this part

Specification	LTC3803IS6#TRMPBF

Clock Sync	No
Control Features	Enable, Current Limit
Duty Cycle (Max)	80 %
Frequency - Switching	200 kHz
Function	Step-Up, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	125 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive, Isolation Capable
Output Phases	1
Output Type	Transistor Driver
Package / Case	TSOT-23-6, SOT-23-6 Thin
Package Name	TSOT-23-6
Synchronous Rectifier	No
Topology	Flyback
Voltage - Supply (Vcc/Vdd) Maximum	8 V
Voltage - Supply (Vcc/Vdd) Minimum	5.7 V

LTC3803 Series

Constant Frequency Current Mode Flyback DC/DC Controller in ThinSOT

Part	Frequency - Switching	Voltage - Supply (Vcc/Vdd) Maximum	Voltage - Supply (Vcc/Vdd) Minimum	Output Phases	Output Type	Function	Clock Sync	Control Features	Duty Cycle (Max)	Number of Outputs	Topology	Operating Temperature (Min)	Operating Temperature (Max)	Output Configuration	Package Name	Package / Case	Synchronous Rectifier	Mounting Type
Analog Devices Inc./Maxim Integrated LTC3803HS6#TRMPBF	200 kHz	8 V	5.7 V	1	Transistor Driver	Step-Down Step-Up	No	Current Limit Enable	80 %	1	Flyback	-40 °C	150 °C	Isolation Capable Positive	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	No	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3803IS6-5#TRPBF	200 kHz	8.1 V	4 V	1	Transistor Driver	Step-Down Step-Up	No	Current Limit Enable	80 %	1	Flyback	-40 °C	125 °C	Isolation Capable Positive	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	No	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3803MPS6-3#TRPBF	300 kHz	8 V	5.7 V	1	Transistor Driver	Step-Down Step-Up	No	Current Limit Enable	80 %	1	Flyback	-55 °C	150 °C	Isolation Capable Positive	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	No	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3803MPS6#TRPBF	200 kHz	8 V	5.7 V	1	Transistor Driver	Step-Down Step-Up	No	Current Limit Enable	80 %	1	Flyback	-55 °C	150 °C	Isolation Capable Positive	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	No	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3803HS6-5#TRPBF	200 kHz	8.1 V	4 V	1	Transistor Driver	Step-Down Step-Up	No	Current Limit Enable	80 %	1	Flyback	-40 °C	150 °C	Isolation Capable Positive	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	No	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3803IS6#TRMPBF	200 kHz	8 V	5.7 V	1	Transistor Driver	Step-Down Step-Up	No	Current Limit Enable	80 %	1	Flyback	-40 °C	125 °C	Isolation Capable Positive	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	No	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3803HS6#TRPBF	200 kHz	8 V	5.7 V	1	Transistor Driver	Step-Down Step-Up	No	Current Limit Enable	80 %	1	Flyback	-40 °C	150 °C	Isolation Capable Positive	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	No	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3803MPS6-3#TRMPBF	300 kHz	8 V	5.7 V	1	Transistor Driver	Step-Down Step-Up	No	Current Limit Enable	80 %	1	Flyback	-55 °C	150 °C	Isolation Capable Positive	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	No	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3803HS6-5#TRMPBF	200 kHz	8.1 V	4 V	1	Transistor Driver	Step-Down Step-Up	No	Current Limit Enable	80 %	1	Flyback	-40 °C	150 °C	Isolation Capable Positive	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	No	Surface Mount
Analog Devices Inc./Maxim Integrated LTC3803HS6-3#TRMPBF	300 kHz	8 V	5.7 V	1	Transistor Driver	Step-Down Step-Up	No	Current Limit Enable	80 %	1	Flyback	-40 °C	150 °C	Isolation Capable Positive	TSOT-23-6	SOT-23-6 Thin TSOT-23-6	No	Surface Mount

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