LD2981CM18TR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low Dropout, CMOS Technology
• Package: SOT-23
• Essence: Regulates voltage with low dropout using CMOS technology
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage: 1.8V
• Output Current: 100mA
• Dropout Voltage: 200mV at 100mA
• Quiescent Current: 50µA
• Line Regulation: 0.04%/V
• Load Regulation: 0.1%/mA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD2981CM18TR has three pins:

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

Functional Features

• Low dropout voltage: The LD2981CM18TR has a low dropout voltage of only 200mV at 100mA output current, ensuring efficient voltage regulation even when the input voltage is close to the desired output voltage.
• CMOS technology: The use of CMOS technology in this voltage regulator results in low quiescent current and improved power efficiency.
• Thermal shutdown protection: The IC incorporates thermal shutdown protection, which prevents damage due to excessive temperature.

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient voltage regulation. - CMOS technology provides low quiescent current and improved power efficiency. - Thermal shutdown protection prevents damage from overheating.

Disadvantages: - Limited output current of 100mA may not be suitable for high-power applications. - Only available in SOT-23 package, which may limit its use in certain circuit designs.

Working Principles

The LD2981CM18TR is a voltage regulator that operates by comparing the input voltage (VIN) with a reference voltage. It adjusts the output voltage (VOUT) to maintain a stable 1.8V regardless of changes in the input voltage or load conditions. The CMOS technology used in this IC allows for low dropout voltage and low quiescent current, resulting in efficient power regulation.

Detailed Application Field Plans

The LD2981CM18TR can be used in various applications where a stable 1.8V voltage supply is required. Some potential application fields include:

1. Battery-powered devices: The low dropout voltage and low quiescent current make it suitable for battery-powered devices such as portable electronics, IoT devices, and wearables.
2. Embedded systems: The IC can be used in embedded systems that require a regulated voltage supply for microcontrollers, sensors, and other components.
3. Automotive electronics: The LD2981CM18TR's wide operating temperature range (-40°C to +125°C) makes it suitable for automotive applications, including infotainment systems, lighting controls, and engine management systems.

Detailed and Complete Alternative Models

• LD2981CM18: Similar to LD2981CM18TR but without tape and reel packaging.
• LD2981CM33TR: Regulates output voltage to 3.3V instead of 1.8V.
• LD2981CM50TR: Regulates output voltage to 5.0V instead of 1.8V.

These alternative models offer similar functionality but with different output voltages to suit specific application requirements.

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