LM1085ISX-3.3

$2.90

Description：IC REG LINEAR 3.3V 3A TO263
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:a27b519042e7 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: Texas Instruments

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR 3.3V 3A TO263
Series：-
Mfr：Texas Instruments
Package：Tape & Reel (TR),Cut Tape (CT)
Output Configuration：Positive
Output Type：Fixed
Number of Regulators：1
Voltage - Input (Max)：27V
Voltage - Output (Min/Fixed)：3.3V
Voltage - Output (Max)：-
Voltage Dropout (Max)：1.5V @ 3A
Current - Output：3A
Current - Quiescent (Iq)：10 mA
Current - Supply (Max)：-
PSRR：72dB (120Hz)
Control Features：-
Protection Features：Over Current, Over Temperature
Operating Temperature：-40°C ~ 125°C (TJ)
Mounting Type：Surface Mount
Package / Case：TO-263-4, D2PAK (3 Leads + Tab), TO-263AA
Supplier Device Package：TO-263 (DDPAK-3)
Grade：-
Qualification：-

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LM1085ISX-3.3

Overview

The LM1085ISX-3.3 is a fixed-output positive low-dropout linear regulator manufactured by Texas Instruments, delivering a nominal output voltage of 3.3V with a maximum continuous load current of 3A. It operates within an input voltage range up to 27V and features a typical dropout voltage of 1.3V at full load. The device incorporates internal thermal overload and short-circuit protection mechanisms to ensure robust operation under fault conditions. Designed for surface-mount applications, it utilizes a D2PAK (TO-263) package with four terminals, supporting junction temperatures from -40°C to +125°C.

Feature Summary

Fixed 3.3V output configuration optimized for standard logic power rails
Integrated thermal shutdown and current limiting for enhanced reliability
Low quiescent current design suitable for battery-powered systems

Applications

Power supplies for microcontrollers and digital logic circuits
Battery-operated portable electronic devices
General-purpose board-level voltage regulation

Procurement Notes

Verify the specific suffix designation against the manufacturer's official datasheet to confirm pinout compatibility and electrical tolerances. Ensure that the procurement source provides valid traceability documentation, as this component may be subject to end-of-life status or obsolescence notices. Cross-reference the ordering part number with the latest Texas Instruments product change notifications to avoid receiving outdated revisions or non-compliant variants.

Selection Notes

Select this regulator when a stable 3.3V supply is required for loads up to 3A in space-constrained designs. The TO-263 package offers superior thermal dissipation compared to smaller SOT packages, making it suitable for moderate power applications without external heatsinks. Consider the input-to-output voltage differential to ensure the dropout voltage remains within acceptable limits for the specific operating conditions.

Part Context

This component belongs to the LM1085 family of 3A low-dropout positive regulators, which also includes adjustable versions and other fixed voltage options. The 'ISX' designation indicates a surface-mount variant in the D2PAK package, distinguishing it from through-hole or smaller footprint alternatives within the same series.