LT1580 - 7A, Very Low Dropout Regulator
Features
- Low Dropout, 540mV at 7A Output Current
- Fast Transient Response
- Remote Sense
- 1mV Load Regulation
- Fixed 2.5V Output and Adjustable Output
- No Supply Sequencing Problems in Dual Supply Mode
Typical Application
Description
The LT1580 is a 7A low dropout regulator designed to power the new generation of microprocessors. The dropout voltage of this device is 100mV at light loads rising to just 540mV at 7A. To achieve this dropout, a second low current input voltage 1V greater than the output voltage, is required. The device can also be used as a single supply device where dropout is comparable to an LT1584.Several other new features have been added to the LT1580. A remote SENSE pin is brought out. This feature virtually eliminates output voltage variations due to load changes. Typical load regulation, measured at the SENSE pin, for a load current step of 100mA to 7A is less than 1mV.The LT1580 has fast transient response, equal to the LT1584. On fixed voltage devices, the ADJ pin is brought out. A small capacitor on the ADJ pin further improves transient response.This device is ideal for generating processor supplies of 2V to 3V on motherboards where both 5V and 3.3V supplies are available.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 |
|---|---|---|---|---|---|
| LT1580CQ#PBF | DDPAK-5 | Q | C | 05-08-1461 | Yes |
| LT1580CQ#TRPBF | DDPAK-5 | Q | C | 05-08-1461 | Yes |
| LT1580CR-2.5#PBF | DDPAK-7 | R | C | 05-08-1462 | Yes |
| LT1580CR-2.5#TRPBF | DDPAK-7 | R | C | 05-08-1462 | Yes |
| LT1580CT#06PBF | TO-220 | T | C | 05-08-1421 (Flow 06) | Yes |
| LT1580CT#PBF | TO-220 | T | C | 05-08-1421 (Standard) | Yes |
| LT1580CT7-2.5#PBF | TO-220 | T7 | C | 05-08-1422 (Standard) | Yes |
| LT1580IQ#PBF | DDPAK-5 | Q | I | 05-08-1461 | Yes |
| LT1580IQ#TRPBF | DDPAK-5 | Q | I | 05-08-1461 | Yes |
| LT1580IR-2.5#PBF | DDPAK-7 | R | I | 05-08-1462 | Yes |
| LT1580IR-2.5#TRPBF | DDPAK-7 | R | I | 05-08-1462 | Yes |
| LT1580IT#06PBF | TO-220 | T | I | 05-08-1421 (Flow 06) | Yes |
| LT1580IT#PBF | TO-220 | T | I | 05-08-1421 (Standard) | Yes |
| LT1580IT7-2.5#06PBF | TO-220 | T7 | I | 05-08-1422 (Standard) | Yes |
| LT1580IT7-2.5#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 | |
|---|---|---|---|---|---|---|
| LT1580CQ#PBF | DDPAK-5 | C | $6.15 | $5.40 | Yes | |
| LT1580CQ#TRPBF | DDPAK-5 | C | $5.52 | Yes | ||
| LT1580CR-2.5#PBF | DDPAK-7 | C | $6.35 | $5.55 | Yes | |
| LT1580CR-2.5#TRPBF | DDPAK-7 | C | $5.65 | Yes | ||
| LT1580CT#06PBF | TO-220 | C | $6.10 | $5.30 | Yes | |
| LT1580CT#PBF | TO-220 | C | $6.10 | $5.30 | Yes | |
| LT1580CT7-2.5#PBF | TO-220 | C | $6.35 | $5.45 | Yes | |
| LT1580IQ#PBF | DDPAK-5 | I | $7.30 | $6.30 | Yes | |
| LT1580IQ#TRPBF | DDPAK-5 | I | $6.42 | Yes | ||
| LT1580IR-2.5#PBF | DDPAK-7 | I | $7.45 | $6.45 | Yes | |
| LT1580IR-2.5#TRPBF | DDPAK-7 | I | $6.57 | Yes | ||
| LT1580IT#06PBF | TO-220 | I | $7.20 | $6.20 | Yes | |
| LT1580IT#PBF | TO-220 | I | $7.20 | $6.20 | Yes | |
| LT1580IT7-2.5#06PBF | TO-220 | I | $7.35 | $6.40 | Yes | |
| LT1580IT7-2.5#PBF | TO-220 | I | $7.35 | $6.40 | 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.Click here to view our complete list of demo boards
Applications
- Microprocessor Supplies
- Post Regulators for Switching Supplies
- High Current Regulators
- 5V to 3.XXV for Pentium®Processors Operating at 90MHz to 166MHz and Beyond
- 3.3V to 2.9V for Portable Pentium Processor
- Power PC™ Series Power Supplies
People Who Viewed This Product Also Viewed
- LT1581 - 10A, Very Low Dropout Regulator
- LT1084 - 7.5A, 5A, 3A Low Dropout Positive Adjustable Regulators
- LT3083 - Adjustable 3A Single Resistor Low Dropout Regulator
- LT3080 - Adjustable 1.1A Single Resistor Low Dropout Regulator
- LT1083 - 7.5A, 5A, 3A Low Dropout Positive Adjustable Regulators
- LT1963A Series - 1.5A, Low Noise, Fast Transient Response LDO Regulators
- LT3081 - 1.5A Single Resistor Rugged Linear Regulator with Monitors
- LT1764A - 3A, Fast Transient Response, Low Noise, LDO Regulators
- LT1584 - 7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed
- LT1763 - 500mA, Low Noise, LDO Micropower Regulators
Product Notifications
Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.
Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.
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:
LT1580
LT1580-2.5
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.
