LT3574EMS#TRPBF

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Analog Devices Inc./Maxim Integrated

ISOLATED FLYBACK CONVERTER WITHOUT AN OPTO-COUPLER

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LT3574EMS#TRPBF

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Analog Devices Inc./Maxim Integrated

ISOLATED FLYBACK CONVERTER WITHOUT AN OPTO-COUPLER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT3574 Series

The LT3574 is a monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or opto-isolator is required for regulation. The part senses the isolated output voltage directly from the primary side flyback waveform. A 0.65A, 60V NPN power switch is integrated along with all control logic into a 16-lead MSOP package.The LT3574 operates with input supply voltages from 3V to 40V, and can deliver output power up to 3W with no external power switch. The LT3574 utilizes boundary mode operation to provide a small magnetic solution with improved load regulation.The output voltage is easily set with two external resistors and the transformer turns ratio. Off-the-shelf transformers are available for many applications.ApplicationsIndustrial, Automotive and Medical Isolated Power Supplies

Technical Specifications

Parameters and characteristics for this part

Specification	LT3574EMS#TRPBF

Current - Output	650 mA
Frequency - Switching (Max)	1 MHz
Frequency - Switching (Min)	40 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	Isolation Capable, Positive or Negative
Package Length	0.118 in
Package Name	16-MSOP, 16-TFSOP
Package Width	3 mm
Synchronous Rectifier	No
Topology	Flyback
Voltage - Input (Max)	40 V
Voltage - Input (Min)	3 V

LT3574 Series

Isolated Flyback Converter Without an Opto-Coupler

Part	Voltage - Input (Max)	Current - Output	Package Name	Number of Outputs	Synchronous Rectifier	Voltage - Input (Min)	Frequency - Switching (Min)	Frequency - Switching (Max)	Mounting Type	Package Length	Package Width	Operating Temperature (Max)	Operating Temperature (Min)	Function	Topology	Output Configuration
Analog Devices Inc./Maxim Integrated LT3574EMS#TRPBF	40 V	650 mA	16-MSOP 16-TFSOP	1	No	3 V	40 kHz	1 MHz	Surface Mount	0.118 in	3 mm	125 °C	-40 °C	Step-Down Step-Up	Flyback	Isolation Capable Positive or Negative
Analog Devices Inc./Maxim Integrated LT3574IMS#TRPBF	40 V	650 mA	16-MSOP 16-TFSOP	1	No	3 V	40 kHz	1 MHz	Surface Mount	0.118 in	3 mm	125 °C	-40 °C	Step-Down Step-Up	Flyback	Isolation Capable Positive or Negative
Analog Devices Inc./Maxim Integrated LT3574IMS#PBF	40 V	650 mA	16-MSOP 16-TFSOP	1	No	3 V	40 kHz	1 MHz	Surface Mount	0.118 in	3 mm	125 °C	-40 °C	Step-Down Step-Up	Flyback	Isolation Capable Positive or Negative
Analog Devices Inc./Maxim Integrated LT3574EMS#PBF	40 V	650 mA	16-MSOP 16-TFSOP	1	No	3 V	40 kHz	1 MHz	Surface Mount	0.118 in	3 mm	125 °C	-40 °C	Step-Down Step-Up	Flyback	Isolation Capable Positive or Negative

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R530 Reliability Data

LT3574EMS#TRPBF | Datasheet