LD1585CD2M33R

Product Overview

Category

LD1585CD2M33R belongs to the category of voltage regulators.

Use

It is used to regulate and stabilize voltage in electronic circuits.

Characteristics

• LD1585CD2M33R is a low-dropout (LDO) voltage regulator.
• It has a fixed output voltage of 3.3V.
• The device operates with an input voltage range from 4.5V to 20V.
• LD1585CD2M33R can provide a maximum output current of 3A.
• It offers excellent line and load regulation.
• The regulator has built-in thermal shutdown and current limit protection features.

Package

LD1585CD2M33R comes in a TO-263-2 package, also known as D2PAK or DDPAK.

Essence

The essence of LD1585CD2M33R is to provide a stable and regulated output voltage for various electronic applications.

Packaging/Quantity

LD1585CD2M33R is typically available in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Input Voltage Range: 4.5V - 20V
• Output Voltage: 3.3V (fixed)
• Maximum Output Current: 3A
• Dropout Voltage: 0.6V (typical)
• Line Regulation: ±0.05% (typical)
• Load Regulation: ±0.1% (typical)
• Operating Temperature Range: -40°C to +125°C
• Thermal Resistance (Junction-to-Ambient): 50°C/W

Detailed Pin Configuration

LD1585CD2M33R has three pins:

1. VIN (Pin 1): Input voltage pin.
2. GND (Pin 2): Ground pin.
3. VOUT (Pin 3): Output voltage pin.

Functional Features

• Low dropout voltage: LD1585CD2M33R can operate with a very small voltage difference between the input and output, minimizing power dissipation.
• Excellent line and load regulation: The regulator maintains a stable output voltage even with variations in input voltage or changes in load current.
• Thermal shutdown protection: It has built-in thermal shutdown circuitry to prevent overheating and damage.
• Current limit protection: LD1585CD2M33R incorporates current limit protection to safeguard against excessive current flow.

Advantages and Disadvantages

Advantages

• High output current capability of 3A.
• Wide input voltage range allows for versatile applications.
• Excellent line and load regulation ensures stable output voltage.
• Built-in thermal shutdown and current limit protection enhance reliability.

Disadvantages

• Fixed output voltage may not be suitable for all applications requiring variable voltages.
• Dropout voltage of 0.6V may limit efficiency in low-power applications.

Working Principles

LD1585CD2M33R operates based on the principle of linear voltage regulation. It uses a pass transistor to regulate the output voltage by adjusting the resistance between the input and output terminals. The regulator compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage.

Detailed Application Field Plans

LD1585CD2M33R finds applications in various electronic devices and systems, including but not limited to: - Power supplies for microcontrollers and digital circuits. - Battery-powered devices requiring stable voltage levels. - Automotive electronics. - Industrial control systems. - Audio amplifiers and other audio equipment. - LED lighting systems.

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to LD1585CD2M33R include: - LM1117-3.3: A popular 3.3V LDO voltage regulator with similar specifications. - LT1086: Adjustable LDO voltage regulator with higher output current capability. - TPS7A3301: Ultra-low dropout voltage regulator with adjustable output voltage.

These alternative models offer different features and specifications, allowing users to choose the most suitable option for their specific application requirements.

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