LT8301 - 42VIN Micropower No-Opto Isolated Flyback Converter with 65V/1.2A Switch
Features
- 2.7V to 42V Input Voltage Range
- 1.2A, 65V Internal DMOS Power Switch
- Low Quiescent Current:
100μA in Sleep Mode
350μA 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
- Output Short-Circuit Protection
- 5-Lead TSOT-23 Package
AEC-Q100 data available for specific packages
Typical Application
Description
The LT®8301 is a micropower 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 1.2A, 65V DMOS power switch is integrated along with all high voltage circuitry and control logic into a 5-lead ThinSOT™ package.
The LT8301 operates from an input voltage range of 2.7V to 42V and can deliver up to 6W 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.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LT8301ES5#PBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT8301ES5#TRMPBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT8301ES5#TRPBF | SOT-23 | S5 | E | 05-08-1635 | Yes |
| LT8301HS5#PBF | SOT-23 | S5 | H | 05-08-1635 | Yes |
| LT8301HS5#TRMPBF | SOT-23 | S5 | H | 05-08-1635 | Yes |
| LT8301HS5#TRPBF | SOT-23 | S5 | H | 05-08-1635 | Yes |
| LT8301IS5#PBF | SOT-23 | S5 | I | 05-08-1635 | Yes |
| LT8301IS5#TRMPBF | SOT-23 | S5 | I | 05-08-1635 | Yes |
| LT8301IS5#TRPBF | SOT-23 | S5 | I | 05-08-1635 | Yes |
| LT8301MPS5#PBF | SOT-23 | S5 | MP | 05-08-1635 | Yes |
| LT8301MPS5#TRM | SOT-23 | S5 | MP | 05-08-1635 | No |
| LT8301MPS5#TRMPBF | SOT-23 | S5 | MP | 05-08-1635 | Yes |
| LT8301MPS5#TRPBF | SOT-23 | S5 | MP | 05-08-1635 | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT8301ES5#PBF | SOT-23 | E | $3.94 | Yes | ||
| LT8301ES5#TRMPBF | SOT-23 | E | $3.94 | $2.81 | Yes | |
| LT8301ES5#TRPBF | SOT-23 | E | $3.94 | $2.76 | Yes | |
| LT8301HS5#PBF | SOT-23 | H | $4.79 | Yes | ||
| LT8301HS5#TRMPBF | SOT-23 | H | $4.79 | $3.40 | Yes | |
| LT8301HS5#TRPBF | SOT-23 | H | $4.79 | $3.35 | Yes | |
| LT8301IS5#PBF | SOT-23 | I | $4.46 | Yes | ||
| LT8301IS5#TRMPBF | SOT-23 | I | $4.46 | $3.17 | Yes | |
| LT8301IS5#TRPBF | SOT-23 | I | $4.46 | $3.12 | Yes | |
| LT8301MPS5#PBF | SOT-23 | MP | $12.02 | Yes | ||
| LT8301MPS5#TRM | SOT-23 | MP | $12.02 | $8.46 | No | |
| LT8301MPS5#TRMPBF | SOT-23 | MP | $12.02 | $8.46 | Yes | |
| LT8301MPS5#TRPBF | SOT-23 | MP | $12.02 | $8.41 | Yes | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC2138B | LT8301ES5 Isolated Demo Board | No-Opto Flyback, 10V ≤ VIN ≤ 32V, VOUT = 12V @ 0.7A to 1A | $100.00 | |
| Buy Now | |||
Designed for Automotive and Transportation Applications
AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LT8301HS5#PBF | SOT-23 | H | $4.79 | Yes | ||
| LT8301HS5#TRMPBF | SOT-23 | H | $4.79 | $3.40 | Yes | |
| LT8301HS5#TRPBF | SOT-23 | H | $4.79 | $3.35 | Yes | |
| LT8301IS5#PBF | SOT-23 | I | $4.46 | Yes | ||
| LT8301IS5#TRMPBF | SOT-23 | I | $4.46 | $3.17 | Yes | |
| LT8301IS5#TRPBF | SOT-23 | I | $4.46 | $3.12 | Yes | |
| Buy Now • Request Samples | ||||||
Applications
- Isolated Telecom, Automotive, Industrial, Medical Power Supplies
- Isolated Auxiliary/Housekeeping Power Supplies
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Design Tools
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LT8301
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
