Overview

Features and Benefits

  • Fast Transient Response
  • Guaranteed Dropout Voltage at Multiple Currents
  • Load Regulation: 0.05% Typ
  • Trimmed Current Limit
  • On-Chip Thermal Limiting

Product Details

The LT1587-1.5 is a low dropout 3-terminal regulator with a fixed 1.5V output voltage and 3A output current capability. The design is optimized for low voltage applications where transient response and minimum input voltage are critical. Similar to the LT1085, it has lower dropout and faster transient response. These improvements make it ideal for low voltage microprocessor applications, especially as the regulator in an Intel Pentium Pro processor GTL+ supply.

Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload that creates excessive junction temperatures.

The LT1587-1.5 is available in both the through-hole and surface mount versions of the industry standard 3-pin TO-220 power package.

Output Current Output Voltage Options
LT1584, -3.3, -3.38, -3.45, -3.6 7A Adj, 3.3V, 3.38V, 3.45V, 3.6V
LT1585, -3.3, -3.38, -3.45, -3.6 4.6A Adj, 3.3V, 3.38V, 3.45V, 3.6V
LT1585A, LT1585A-3.3 5A Adj, 3.3V
LT1585-1.5, LT1585A-1.5 4.6A/5A Fixed 1.5V
LT1587, -3.3, -3.45, -3.6 3A Adj. 3.3V, 3.45V, 3.6V
LT1587-1.5 3A Fixed 1.5V

Applications

  • Intel Pentium® Pro Processor GTL+ Supply
  • Low Voltage Logic Supplies
  • Battery-Powered Circuitry

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations

LTspice

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.

LTspice

Models for the following parts are available in LTspice:

LT1587
LT1587-3
LT1587-3.3
LT1587-3.38
LT1587-3.45
LT1587-3.6

Design Resources

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.

Support & Discussions

LT1587-1.5 Discussions

RE: LTC2984 TC CJ Diode Overrange
2 week(s) ago in Temperature Sensors
RE: ad5941 EIS impedance
2 week(s) ago in Precision ADCs
RE: AD7134 Gain calibration value
3 week(s) ago in Precision ADCs

Sample & Buy

Sample & Buy functionality exists in desktop site
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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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