LT8315
PRODUCTION560VIN Micropower No-Opto Isolated Flyback Converter with 630V/300mA Switch
- Part Models
- 6
- 1ku List Price
- Starting From $6.21
Overview
- Wide Input Voltage Range: 18V to 560V
- 630V/300mA Integrated Power Switch
- No Opto-Isolator Required for Regulation
- Quasi-Resonant Boundary Mode Operation
- Constant-Current and Constant-Voltage Regulation
- Low-Ripple Light Load Burst Mode® Operation
- Low Quiescent Current: 70μA
- Programmable Current Limit and Soft-Start
- TSSOP Package with High Voltage Spacing
The LT8315 is a high voltage flyback converter with integrated 630V/300mA switch. No opto-isolator is needed for regulation. The device samples the output voltage from the isolated flyback waveform appearing across a third winding on the transformer. Quasi-resonant boundary mode operation improves load regulation, reduces transformer size, and maintains high efficiency.
At start-up, the LT8315 charges its INTVCC capacitor via a current source attached to the DRAIN pin. During normal operation, the current source turns off and the device draws its power from a third winding on the transformer.
The LT8315 operates from a wide range of input supply voltages and can deliver up to 15W of power. It is available in a thermally enhanced 20-pin TSSOP package with four pins removed for high-voltage spacing.
Applications
- Isolated Telecom, Automotive, Industrial, Medical Power Supplies
- Isolated Off Line Housekeeping Power Supplies
- Electric Vehicles and Battery Stacks
Documentation
Data Sheet 1
User Guide 2
Technical Articles 3
3rd Party Solutions 1
Analog Dialogue 1
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 |
|---|---|---|---|
| LT8315EFE#PBF | 20-Lead TSSOP w/ EP | ||
| LT8315EFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LT8315HFE#PBF | 20-Lead TSSOP w/ EP | ||
| LT8315HFE#TRPBF | 20-Lead TSSOP w/ EP | ||
| LT8315IFE#PBF | 20-Lead TSSOP w/ EP | ||
| LT8315IFE#TRPBF | 20-Lead TSSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| LT8315EFE#PBF | PRODUCTION | |
| LT8315EFE#TRPBF | PRODUCTION | |
| LT8315HFE#PBF | PRODUCTION | |
| LT8315HFE#TRPBF | PRODUCTION | |
| LT8315IFE#PBF | PRODUCTION | |
| LT8315IFE#TRPBF | PRODUCTION | |
|
Dec 17, 2025 - 25_0056 LT8315 Die Revision |
||
| LT8315EFE#PBF | PRODUCTION | |
| LT8315EFE#TRPBF | PRODUCTION | |
| LT8315HFE#PBF | PRODUCTION | |
| LT8315HFE#TRPBF | PRODUCTION | |
| LT8315IFE#PBF | PRODUCTION | |
| LT8315IFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LT8315EFE#PBF | PRODUCTION | |
| LT8315EFE#TRPBF | PRODUCTION | |
| LT8315HFE#PBF | PRODUCTION | |
| LT8315HFE#TRPBF | PRODUCTION | |
| LT8315IFE#PBF | PRODUCTION | |
| LT8315IFE#TRPBF | PRODUCTION | |
|
Apr 11, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process |
||
| LT8315EFE#PBF | PRODUCTION | |
| LT8315EFE#TRPBF | PRODUCTION | |
| LT8315HFE#PBF | PRODUCTION | |
| LT8315HFE#TRPBF | PRODUCTION | |
| LT8315IFE#PBF | PRODUCTION | |
| LT8315IFE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT8315
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.
