LT8303
RECOMMENDED FOR NEW DESIGNS100VIN Micropower Isolated Flyback Converter with 150V/450mA Switch
- Part Models
- 10
- 1ku List Price
- Starting From $4.78
Overview
- 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 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
- VOUT Set 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
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.
APPLICATIONS
- Isolated Telecom, Datacom, Automotive, Industrial, and Medical Power Supplies
- Isolated Auxiliary/Housekeeping Power Supplies
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Brochure 1
Product Selector Card 1
3rd Party Solutions 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 |
|---|---|---|---|
| LT8303ES5#TRMPBF | 5-Lead TSOT-23 | ||
| LT8303ES5#TRPBF | 5-Lead TSOT-23 | ||
| LT8303HS5#TRMPBF | 5-Lead TSOT-23 | ||
| LT8303HS5#TRPBF | 5-Lead TSOT-23 | ||
| LT8303HS5#WTRMPBF | 5-Lead TSOT-23 | ||
| LT8303HS5#WTRPBF | 5-Lead TSOT-23 | ||
| LT8303IS5#TRMPBF | 5-Lead TSOT-23 | ||
| LT8303IS5#TRPBF | 5-Lead TSOT-23 | ||
| LT8303RS5#WTRMPBF | 5-Lead TSOT-23 | ||
| LT8303RS5#WTRPBF | 5-Lead TSOT-23 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 11, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process |
||
| LT8303ES5#TRMPBF | PRODUCTION | |
| LT8303ES5#TRPBF | PRODUCTION | |
| LT8303HS5#TRMPBF | PRODUCTION | |
| LT8303HS5#TRPBF | PRODUCTION | |
| LT8303IS5#TRMPBF | PRODUCTION | |
| LT8303IS5#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4366 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT8303
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
72 V to 96 V Battery Management System for Electric 2- and 3-Wheelers
Resources
Software
LT8303ES5 Isolated Demo Board | No-Opto Flyback, 36V ≤ VIN ≤ 72V, VOUT = 5V @ up to 0.84A