LT8304
LT8304-1

RECOMMENDED FOR NEW DESIGNS

100V_IN Micropower No-Opto Isolated Flyback Converter with 150V/2A Switch

Data Sheet (Rev. B) Product Selection Table

Part Models: 12
1ku List Price: Starting From $4.25

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Overview

3V to 100V Input Voltage Range
2A, 150V Internal DMOS Power Switch
Low Quiescent Current:
- 116μA in Sleep Mode
- 390μA in Active Mode
Quasi-Resonant Boundary Mode Operation at Heavy Load
Low Ripple Burst Mode^® Operation at Light Load

Minimum Load < 0.5% (Typ) of Full Output
No Transformer Third Winding or Opto-Isolator
Required for Output Voltage Regulation
Accurate EN/UVLO Threshold and Hysteresis
Internal Compensation and Soft-Start
Temperature Compensation for Output Diode
Output Short-Circuit Protection
Thermally Enhanced 8-Lead SO Package

The LT8304/LT8304-1 are monolithic micropower isolated flyback converters. By sampling the isolated output voltage directly from the primary-side flyback waveform, the parts require no third winding or opto-isolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation resistor. 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 2A, 150V DMOS power switch is integrated along with all the high voltage circuitry and control logic into a thermally enhanced 8-lead SO package.

The LT8304/LT8304-1 operate from an input voltage range of 3V to 100V and deliver up to 24W of isolated output power. The high level of integration and the use of boundary and low ripple Burst Mode operation result in a simple to use, low component count, and high efficiency application solution for isolated power delivery. The LT8304-1 is specially optimized for high step-up output applications.

Applications

Isolated Automotive, Industrial, Medical, Telecom Power Supplies
Isolated Auxiliary/Housekeeping Power Supplies

Part Models: 12
1ku List Price: Starting From $4.25

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT8304ES8E#PBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8304ES8E#TRPBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8304ES8E-1#PBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8304ES8E-1#TRPBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8304HS8E#PBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8304HS8E#TRPBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8304HS8E-1#PBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8304HS8E-1#TRPBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8304IS8E#PBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8304IS8E#TRPBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8304IS8E-1#PBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8304IS8E-1#TRPBF	8-Lead SOIC (Narrow 0.15 Inch w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 11, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process
		PCN19_0067_Form Material_Report Delta Qualification Matrix Qualification Results Summary Detailed Parts List Other
LT8304ES8E#PBF	PRODUCTION
LT8304ES8E#TRPBF	PRODUCTION
LT8304ES8E-1#PBF	PRODUCTION
LT8304ES8E-1#TRPBF	PRODUCTION
LT8304HS8E#PBF	PRODUCTION
LT8304HS8E#TRPBF	PRODUCTION
LT8304HS8E-1#PBF	PRODUCTION
LT8304HS8E-1#TRPBF	PRODUCTION
LT8304IS8E#PBF	PRODUCTION
LT8304IS8E#TRPBF	PRODUCTION
LT8304IS8E-1#PBF	PRODUCTION
LT8304IS8E-1#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
MOSFET & Gate Drivers 1
LTM9100	PRODUCTION	Anyside^™ High Voltage Isolated Switch Controller with I²C Command and Telemetry
Protection Switches & Controllers 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Parts	Product Life Cycle	Description
LT8302 LT8302-3		42V_IN Micropower No-Opto Isolated Flyback Converter with 65V/3.6A Switch

Tools & Simulations

LTspice 1

LT8304 Demo Circuit - µPower No-Opto Isolated Flyback Converter (18-72V to 5V @ 2A)

Models for the following parts are available in LTspice:

LT8304
LT8304-1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

LT8304ES8E Isolated Demo Board | No-Opto Flyback, 18V ≤ VIN ≤ 72V; VOUT = 5V @ 2A to 4.2A

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Product Details

Demonstration circuit 2393A is a micropower no-opto isolated flyback converter featuring the LT8304. This demo circuit outputs 5.0V, and maintains tight regulation with a load current from 20mA up to 4.2A and over an input voltage from 18V to 72V. The output current capability increases with the input voltage, as shown in the Performance Summary table.

Resources

DC2393A - Schematic
5/25/2016

DC2393A - Design Files
5/25/2016

DC2393A - Demo Manual
5/25/2016

2-port 10BASE-T1L Arduino Shield with SPoE Power Forwarding

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Features and Benefits

Software-controlled Power and Data forwarding
Power isolation
Multiple SPoE classes
Complete connectivity passthrough
Compatible with Arduino Mega form-factor
Supports daisy chaining with other compatible boards

Product Details

The AD-APARDPFW-SL is a 10BASE-T1L power forwarder with Single Pair Power over Ethernet (SPoE) for development of field devices and applications on an AD-APARD32690-SL platform board. The SPoE powered device (PD) and isolated flyback regulator provide 12V power to the platform board. SPoE Class 10 to 12 (24V nominal) and Class 13 to 14 (55V nominal) are supported.

Designed for use on the AD-APARD32690-SL platform, the AD-APARDPFW-SL hardware features Arduino Mega Form-factor headers, and two 10BASE-T1L ports for connecting to a 10BASE-T1L Power Sourcing Equipment (PSE) such as the AD-RPI-T1LPSE-SL 2-port 10BASE-T1L with SPoE PSE Development Platform.

To allow board stacking and development of field device applications using Arduino shields, the AD-APARDPFWD-SL has extra tall headers that allow other Arduino shields to be stacked on top of it.

The design also features complete power and data isolation to the host AD-APARD32690-SL.

APPLICATIONS

Factory automation
Process control
Intelligent buildings
Secure field instruments
Internet of Things

Resources

AD-APARDPFW-SL - Design Support Files
12/16/2025

AD-APARDPFW-SL User Guide
12/16/2025

10BASE-T1L Power Extractor with Class 10-14 SPoE for the AD-APARD32690-SL

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Features and Benefits

Plug-and-play solution
Compatible with the newest version of AD-APARD32690-SL
Power extraction using the AD-APARD32690-SL’s SPoE connector
Power isolation
Multiple SPoE classes
Complete connectivity passthrough

Product Details

The AD-APARDSPOE-SL is a 10BASE-T1L power extractor with Single Pair Power over Ethernet (SPoE) for development of field devices and applications on an AD-APARD32690-SL platform board. The SPoE powered device (PD) and isolated flyback regulator provide 12V power to the platform board. SPoE Class 10-12 (24V nominal) and Class 13-14 (55V nominal) are supported.

Important Compatibility Note:
The AD-APARDSPOE-SL works only with the newest revision of the AD-APARD32690-SL boards, as it requires a 90-degree connector for proper integration.

Designed for use on the AD-APARD32690-SL platform, the AD-APARDSPOE-SL hardware features Arduino form-factor headers and three pins to extract power from the AD-APARD32690-SL board.

To support board stacking and the development of field device applications using Arduino shields, the AD-APARDSPOE-SL is equipped with extra-tall headers, enabling other Arduino shields to be stacked on top of it.

The design also features complete power isolation to the host AD-APARD32690-SL.

APPLICATIONS

Factory automation
Process control
Intelligent buildings
Secure field instruments
Internet of Things

Resources

AD-APARDSPOE-SL - Design Files
12/16/2025

AD-APARDSPOE-SL User Guide
12/16/2025

Reference Designs

Figure 1. CN0575 Simplified Block Diagram

10BASE-T1L Field Device Development Platform with Class 12 and 13 SPoE

View Detailed Reference Design

Features and Benefits

Data and Power Delivery using Single Pair Power over Ethernet
Power Class 12 and 13 Delivery Capable
Supports Longer Distances up to 1 km
Provides Speeds up to 10 MBPS
Works with Existing Software Stacks like PROFINET, EtherCat, MOD-BUS, and others