LT1581
LT1581
PRODUCTION10A, Very Low Dropout Regulator
- Part Models
- 2
- 1ku List Price
- Starting From $12.53
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Overview
- Low Dropout, 430mV at 10A 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
The LT1581 is a 10A 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 430mV at 10A. 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 LT1581. A remote SENSE pin is brought out. This feature virtually eliminates output voltage variations due to load changes. Typical load regulation for a load current step of 100mA to 10A, measured at the SENSE pin, is less than 1mV.
The LT1581 has fast transient response, equal to the LT1584. On fixed voltage devices, the ADJUST pin is brought out. A small capacitor on the ADJUST 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.
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
- PowerPC™ Series Power Supplies
Documentation
Data Sheet 1
Brochure 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 |
|---|---|---|---|
| LT1581CT7#PBF | 7-Lead TO-220 | ||
| LT1581CT7-2.5#PBF | 7-Lead TO-220 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 10, 2022 - 22_0175 Laser Top Mark Conversion for DDPAK & TO220 Packages Assembled in ADPG. Country of Origin Code [MY] To Be Incorporated On Top Mark |
||
| LT1581CT7#PBF | PRODUCTION | |
| LT1581CT7-2.5#PBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LT1581
- LT1581-2.5
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.
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