LT1371 - 500kHz High Efficiency 3A Switching Regulator
Features
- Faster Switching with Increased Efficiency
- Uses Small Inductors: 4.7µH
- All Surface Mount Components
- Low Minimum Supply Voltage: 2.7V
- Quiescent Current: 4mA Typ
- Current Limited Power Switch: 3A
- Regulates Positive or Negative Outputs
- Shutdown Supply Current: 12µA Typ
- Easy External Synchronization
AEC-Q100 data available for specific packages
Typical Application
Description
The LT1371 is a monolithic high frequency current mode switching regulator. It can be operated in all standard switching configurations including boost, buck, flyback, forward, inverting and “Cuk”. A 3A high efficiency switch is included on the die, along with all oscillator, control and protection circuitry.The LT1371 typically consumes only 4mA quiescent current and has higher efficiency than previous parts. High frequency switching allows for very small inductors to be used.New design techniques increase flexibility and maintain ease of use. Switching is easily synchronized to an external logic level source. A logic low on the Shutdown pin reduces supply current to 12µA. Unique error amplifier circuitry can regulate positive or negative output voltage while maintaining simple frequency compensation techniques. Nonlinear error amplifier transconductance reduces output overshoot on start-up or overload recovery. Oscillator frequency shifting protects external components during overload conditions.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 |
|---|---|---|---|---|---|
| LT1371CR#PBF | DDPAK-7 | R | C | 05-08-1462 | Yes |
| LT1371CR#TRPBF | DDPAK-7 | R | C | 05-08-1462 | Yes |
| LT1371CSW#PBF | SW-20 | SW | C | 05-08-1620 (SW20) | Yes |
| LT1371CSW#TRPBF | SW-20 | SW | C | 05-08-1620 (SW20) | Yes |
| LT1371CT7#PBF | TO-220 | T7 | C | 05-08-1422 (Standard) | Yes |
| LT1371HVCR#PBF | DDPAK-7 | R | C | 05-08-1462 | Yes |
| LT1371HVCR#TRPBF | DDPAK-7 | R | C | 05-08-1462 | Yes |
| LT1371HVCSW#PBF | SW-20 | SW | C | 05-08-1620 (SW20) | Yes |
| LT1371HVCSW#TRPBF | SW-20 | SW | C | 05-08-1620 (SW20) | Yes |
| LT1371HVCT7#PBF | TO-220 | T7 | C | 05-08-1422 (Standard) | Yes |
| LT1371HVIR#PBF | DDPAK-7 | R | I | 05-08-1462 | Yes |
| LT1371HVIR#TRPBF | DDPAK-7 | R | I | 05-08-1462 | Yes |
| LT1371HVISW#PBF | SW-20 | SW | I | 05-08-1620 (SW20) | Yes |
| LT1371HVISW#TRPBF | SW-20 | SW | I | 05-08-1620 (SW20) | Yes |
| LT1371HVIT7#PBF | TO-220 | T7 | I | 05-08-1422 (Standard) | Yes |
| LT1371IR#PBF | DDPAK-7 | R | I | 05-08-1462 | Yes |
| LT1371IR#TRPBF | DDPAK-7 | R | I | 05-08-1462 | Yes |
| LT1371ISW#PBF | SW-20 | SW | I | 05-08-1620 (SW20) | Yes |
| LT1371ISW#TRPBF | SW-20 | SW | I | 05-08-1620 (SW20) | Yes |
| LT1371IT7#PBF | TO-220 | T7 | I | 05-08-1422 (Standard) | 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 | |
|---|---|---|---|---|---|---|
| LT1371CR#PBF | DDPAK-7 | C | $6.40 | $5.15 | Yes | |
| LT1371CR#TRPBF | DDPAK-7 | C | $5.27 | Yes | ||
| LT1371CSW#PBF | SW-20 | C | $7.10 | $5.65 | Yes | |
| LT1371CSW#TRPBF | SW-20 | C | $5.75 | Yes | ||
| LT1371CT7#PBF | TO-220 | C | $6.40 | $5.15 | Yes | |
| LT1371HVCR#PBF | DDPAK-7 | C | $6.85 | $5.45 | Yes | |
| LT1371HVCR#TRPBF | DDPAK-7 | C | $5.57 | Yes | ||
| LT1371HVCSW#PBF | SW-20 | C | $7.50 | $6.00 | Yes | |
| LT1371HVCSW#TRPBF | SW-20 | C | $6.10 | Yes | ||
| LT1371HVCT7#PBF | TO-220 | C | $6.85 | $5.45 | Yes | |
| LT1371HVIR#PBF | DDPAK-7 | I | $8.10 | $6.45 | Yes | |
| LT1371HVIR#TRPBF | DDPAK-7 | I | $6.57 | Yes | ||
| LT1371HVISW#PBF | SW-20 | I | $8.75 | $7.00 | Yes | |
| LT1371HVISW#TRPBF | SW-20 | I | $7.10 | Yes | ||
| LT1371HVIT7#PBF | TO-220 | I | $8.10 | $6.45 | Yes | |
| LT1371IR#PBF | DDPAK-7 | I | $7.60 | $6.15 | Yes | |
| LT1371IR#TRPBF | DDPAK-7 | I | $6.27 | Yes | ||
| LT1371ISW#PBF | SW-20 | I | $8.35 | $6.65 | Yes | |
| LT1371ISW#TRPBF | SW-20 | I | $6.75 | Yes | ||
| LT1371IT7#PBF | TO-220 | I | $7.60 | $6.15 | 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 |
|---|---|---|---|
| DC093A | LT1371CR | 12V OUTPUT BOOST CONVERTER | $75.00 | |
| 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 | |
|---|---|---|---|---|---|---|
| LT1371HVIR#PBF | DDPAK-7 | I | $8.10 | $6.45 | Yes | |
| LT1371HVIR#TRPBF | DDPAK-7 | I | $6.57 | Yes | ||
| LT1371IR#PBF | DDPAK-7 | I | $7.60 | $6.15 | Yes | |
| LT1371IR#TRPBF | DDPAK-7 | I | $6.27 | Yes | ||
| Buy Now • Request Samples | ||||||
Applications
- Boost Regulators
- Laptop Computer Supplies
- Multiple Output Flyback Supplies
- Inverting Supplies
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Design Tools
LTspice
LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice
Models for the following parts are available in LTspice:
LT1371
LT1371HV
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.
