LT8303 Series

100VINMicropower Isolated Flyback Converter with 150V/450mA Switch

Catalog

100VINMicropower Isolated Flyback Converter with 150V/450mA Switch

Part	Operating Temperature [Max]	Operating Temperature [Min]	Number of Outputs	Voltage - Input (Max) [Max]	Output Configuration	Package / Case	Voltage - Input (Min) [Min]	Mounting Type	Function	Frequency - Switching [Min]	Frequency - Switching [Max]	Topology	Current - Output	Output Type
Analog Devices LT8303HS5#TRPBF	150 °C	-40 °C	1	100 V	Isolation Capable Positive	SOT-23-5 Thin TSOT-23-5	5.5 V	Surface Mount	Step-Up/Step-Down	7 kHz	350 kHz	Flyback	450 mA	Adjustable
Analog Devices LT8303ES5#TRPBF	125 ¯C	-40 °C	1	100 V	Isolation Capable Positive	SOT-23-5 Thin TSOT-23-5	5.5 V	Surface Mount	Step-Up/Step-Down	7 kHz	350 kHz	Flyback	450 mA	Adjustable
Analog Devices LT8303ES5#TRMPBF	125 ¯C	-40 °C	1	100 V	Isolation Capable Positive	SOT-23-5 Thin TSOT-23-5	5.5 V	Surface Mount	Step-Up/Step-Down	7 kHz	350 kHz	Flyback	450 mA	Adjustable
Analog Devices LT8303IS5#TRMPBF	125 ¯C	-40 °C	1	100 V	Isolation Capable Positive	SOT-23-5 Thin TSOT-23-5	5.5 V	Surface Mount	Step-Up/Step-Down	7 kHz	350 kHz	Flyback	450 mA	Adjustable
Analog Devices LT8303IS5#TRPBF	125 ¯C	-40 °C	1	100 V	Isolation Capable Positive	SOT-23-5 Thin TSOT-23-5	5.5 V	Surface Mount	Step-Up/Step-Down	7 kHz	350 kHz	Flyback	450 mA	Adjustable

Catalog

100VINMicropower Isolated Flyback Converter with 150V/450mA Switch

Key Features

• 5.5V to 100V Input Voltage Range

• 450mA, 150V Internal DMOS Power Switch

• Up to 5W of Output Power

• Low Quiescent Current:70μA in Sleep Mode280μA in Active Mode

• 70μA in Sleep Mode

• 280μA in Active Mode

• Boundary Mode Operation at Heavy Load

• Low-Ripple Burst Mode®Operation at Light Load

• Minimum Load <0.5% (Typ) of Full Output

• VOUTSet with a Single External Resistor

• No Transformer Third Winding or Opto-Isolator Required for Regulation

• Accurate EN/UVLO Threshold and Hysteresis

• Internal Compensation and Soft-Start

• 5-Lead TSOT-23 Package

• AEC-Q100 Qualified for Automotive Applications

Description

The LT8303 is a micropower high voltage isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or opto-isolator for regulation. The output voltage is programmed with a single external resistor. Internal compensation and soft-start further reduce external component count. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple Burst Mode operation maintains high efficiency at light load while minimizing the output voltage ripple. A 450mA, 150V DMOS power switch is integrated along with all high voltage circuitry and control logic into a 5-lead thinSOT™package.The LT8303 operates from an input voltages range of 5.5V to 100V and can deliver up to 5W of isolated output power. The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low component count, and high efficiency application solution for isolated power delivery.APPLICATIONSIsolated Telecom, Datacom, Automotive, Industrial, and Medical Power SuppliesIsolated Auxiliary/Housekeeping Power Supplies