LT1085CT

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LT1085CT

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規格

Series LT1085
Brand Analog Devices
Product Type LDO Voltage Regulators
Subcategory PMIC - Power Management ICs
Product Linear Regulators
Type Positive Adjustable Regulator
Minimum Operating Temperature 0 C
Maximum Operating Temperature + 150 C
Shipping Restrictions Mouser does not presently sell this product in your region.
Package / Case TO-220-3
Height 4.57 mm
Output Voltage Adjustable
Load Regulation 0.2 V
Output Current 3 A
Number of Outputs 1 Output
Input Voltage - Min 2.55 V
Input Voltage - Max 30 V
Operating Supply Current 5 mA
Polarity Positive
PSRR / Ripple Rejection - Typ 75 dB
Output Type Adjustable
Dropout Voltage 1.3 V
Dropout Voltage - Max 1.5 V
Line Regulation 0.05 %
Reference Voltage 1.25 V

概述

Description

The LT1085CT is a voltage regulator from the Linear Technology family, designed to provide efficient and reliable power regulation with minimal external components. It is a low dropout (LDO) regulator, meaning it can maintain a stable output voltage even when the input voltage is very close to the output voltage. The "CT" in its designation often refers to the package type, which is a standard TO-220 package, suitable for heat dissipation.
The LT1085CT can handle output currents up to 3A, making it suitable for a variety of high-power applications. It offers a typical dropout voltage of 1.3V at maximum load, which is relatively low compared to other regulators. This feature is beneficial for battery-powered devices, where maximizing efficiency is crucial.
The device supports adjustable output voltage, usually through a resistive divider connected to its adjustment pin, allowing for flexibility in different circuit designs. Additionally, it includes features like thermal shutdown and current limiting for protection against overload conditions. The LT1085CT is commonly used in applications such as power supplies for computers, industrial equipment, and consumer electronics.

Features

The LT1085CT is a low dropout positive voltage regulator known for its high current capability and efficient performance. Key features include:
1. Output Current: It can deliver up to 3A of output current, which makes it suitable for applications requiring moderate to high power.
2. Dropout Voltage: The dropout voltage is approximately 1.3V at full load, ensuring efficient voltage regulation even when the input-output voltage differential is small.
3. Adjustable Output: The output voltage can be easily set using external resistors, offering flexibility for various applications.
4. Thermal Regulation: It has excellent thermal regulation properties, ensuring stable operation under varying temperature conditions.
5. Protection Features: Built-in protection features include current limiting, safe operating area protection, and thermal shutdown, which enhance reliability and prevent damage due to overload or overheating.
6. Package: The LT1085CT comes in a TO-220 package, which offers good thermal performance and is easy to mount on a heat sink.
These features make the LT1085CT suitable for applications such as power supply circuits, battery chargers, and general-purpose voltage regulation in electronic devices.

Package

The LT1085CT is typically available in a TO-220 package. This package type is commonly used for power components, allowing for efficient heat dissipation.

Pinout

The LT1085CT is a low dropout (LDO) voltage regulator with a 3-pin configuration. Its main function is to provide a regulated output voltage with a dropout voltage of around 1.5 volts at full load. The pins are configured as follows:
1. Input (Pin 1): This pin receives the unregulated input voltage that needs to be regulated.

2. Output (Pin 2): This pin delivers the regulated output voltage. It is essential to connect a suitable load and capacitors to ensure stability and proper operation.
3. Adjust (Pin 3): This pin is used to adjust the output voltage. By connecting a pair of resistors between this pin and the output, users can set the desired output voltage level.
The LT1085CT is commonly used in applications requiring a stable and reliable power supply, such as powering sensitive electronics and microprocessors.

Manufacturer

The LT1085CT is manufactured by Analog Devices, Inc. Originally, it was produced by Linear Technology Corporation, which was acquired by Analog Devices in 2017. Analog Devices is a multinational semiconductor company that designs, manufactures, and markets a broad range of integrated circuits used in electronic equipment. The company specializes in data conversion, signal processing, and power management technology, serving industries like communications, automotive, healthcare, and industrial automation.

Application

The LT1085CT is a low dropout voltage regulator commonly used in applications requiring a stable 3A output current. Key application areas include powering microprocessors, high-efficiency linear regulators, post-regulation for switching supplies, and battery-powered systems. It's particularly useful in environments needing low voltage drop and high thermal performance, such as telecommunications, consumer electronics, and industrial equipment. Its adjustable output also makes it suitable for custom voltage regulation needs.

Equivalent

The LT1085CT is a low dropout (LDO) linear voltage regulator. Equivalent products include:
- LM317: Widely-used adjustable voltage regulator.
- LM1085: Pin and function compatible with similar dropout voltage.
- MIC29300: Offers similar performance in a 3A LDO regulator.
- LD1117: Commonly used for lower power applications.
These alternatives may have varying specifications, so it is important to verify compatibility with specific requirements.

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