LT1085

PRODUCTION

7.5A, 5A, 3A Low Dropout Positive Adjustable Regulators

Data Sheet Product Selection Table
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Overview

  • 3-Terminal Adjustable
  • Output Current of 3A, 5A or 7.5A
  • Operates Down to 1V Dropout
  • Guaranteed Dropout Voltage at Multiple Current Levels
  • Line Regulation: 0.015%
  • Load Regulation: 0.1%
  • 100% Thermal Limit Functional Test
  • Fixed Versions Available
  • Available in 3-Lead Plastic TO-220, TO-3P and DD Packages

The LT1083 series of positive adjustable regulators are designed to provide 7.5A, 5A and 3A with higher efficiency than currently available devices. All internal circuitry is designed to operate down to 1V input-to-output differential and the dropout voltage is fully specified as a function of load current. Dropout is guaranteed at a maximum of 1.5V at maximum output current, decreasing at lower load currents. On-chip trimming adjusts the reference voltage to 1%. Current limit is also trimmed, minimizing the stress on both the regulator and power source circuitry under overload conditions.

The LT1083/LT1084/LT1085 devices are pin compatible with older 3-terminal regulators. A 10μF output capacitor is required on these new devices. However, this is included in most regulator designs.

Unlike PNP regulators, where up to 10% of the output current is wasted as quiescent current, the LT1083 quiescent current flows into the load, increasing efficiency.

Applications

  • High Efficiency Linear Regulators
  • Post Regulators for Switching Supplies
  • Constant Current Regulators
  • Battery Chargers
LT1085
7.5A, 5A, 3A Low Dropout Positive Adjustable Regulators
5V, 7.5A Regulator Dropout Voltage vs Output Current Product Package 1 Product Package 2 Product Package 3 Product Package 4
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Documentation

Data Sheet 1

Reliability Data 1

Application Note 4

Design Note 4

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
LT1764
PRODUCTION 3A, Fast Transient Response, Low Noise, LDO Regulators
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LT1085
  • LT1085-12
  • LT1085-3.3
  • LT1085-3.6
  • LT1085-5
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.

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