TILM1085IS-5.0/NOPB

Overview

The LM1085IS-5.0/NOPB is a low-dropout (LDO) positive voltage regulator designed to provide 5V at up to 3A of output current. It is part of the LM1085 series which features a dropout voltage of 1.5V at maximum current, making it suitable for high-current applications requiring a stable 5V rail. This variant is housed in a surface-mount TO-263 package, often referred to as DDPAK or D2PAK.

Why Choose This Part

The device offers robust 3A current delivery with internal current limiting and thermal protection to prevent failure during overload conditions. It maintains tight output regulation with a maximum output voltage tolerance of +/- 1 percent and provides 68dB of PSRR at 120Hz for noise rejection.

Applications

Getting Started

When designing the PCB layout for the TO-263 package, ensure the large metal tab is soldered to a significant copper area for heat dissipation. Use a minimum of 10uF tantalum or electrolytic capacitors on the output to ensure loop stability across the full -40C to 125C operating temperature range.

LM1085 Family

Comparing specs that differ across variants. The current part is highlighted.

Also Consider

LD1085V50 STMicroelectronics - An alternative 3A low-dropout regulator with similar pinout and performance characteristics in a through-hole TO-220 package.

LT1085CT-5 Analog Devices - A high-performance equivalent with excellent long-term stability and reliability for industrial applications.

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