LD2985AM47R

Product Overview

Category

LD2985AM47R belongs to the category of voltage regulators.

Use

It is primarily used for regulating voltage in electronic circuits.

Characteristics

• Low dropout voltage
• Low quiescent current
• High output voltage accuracy
• Thermal shutdown protection
• Short-circuit current limit

Package

The LD2985AM47R comes in a small SOT-23 package.

Essence

The essence of LD2985AM47R lies in its ability to provide stable and regulated voltage output for various electronic applications.

Packaging/Quantity

The LD2985AM47R is typically packaged in reels, with each reel containing a specific quantity of units. The exact packaging and quantity may vary depending on the manufacturer.

Specifications

• Input Voltage Range: 2.5V to 16V
• Output Voltage: 4.7V
• Dropout Voltage: 300mV (typical)
• Quiescent Current: 50µA (typical)
• Output Current: Up to 150mA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD2985AM47R has three pins:

1. VIN (Input Voltage): This pin is connected to the input voltage source.
2. GND (Ground): This pin is connected to the ground reference.
3. VOUT (Output Voltage): This pin provides the regulated output voltage.

Functional Features

• Low Dropout Voltage: LD2985AM47R exhibits low dropout voltage, allowing it to regulate the output voltage even when the input voltage is close to the desired output voltage.
• Low Quiescent Current: The regulator consumes minimal current when there is no load, resulting in improved energy efficiency.
• High Output Voltage Accuracy: LD2985AM47R provides precise and stable output voltage, ensuring reliable performance of the connected electronic components.
• Thermal Shutdown Protection: The regulator incorporates thermal shutdown protection to prevent damage due to excessive heat.
• Short-Circuit Current Limit: LD2985AM47R has built-in short-circuit current limiting capability, safeguarding the circuit from potential damage in case of a short circuit.

Advantages and Disadvantages

Advantages

• Low dropout voltage enables efficient regulation even with low input voltages.
• Low quiescent current minimizes power consumption.
• High output voltage accuracy ensures reliable operation of connected devices.
• Thermal shutdown protection prevents overheating and subsequent damage.
• Short-circuit current limit protects the circuit from potential harm.

Disadvantages

• Limited output current capacity (up to 150mA) may not be suitable for high-power applications.
• Restricted input voltage range (2.5V to 16V) may limit compatibility with certain systems.

Working Principles

The LD2985AM47R operates based on the principle of linear voltage regulation. It utilizes a pass transistor to regulate the output voltage by adjusting the resistance between the input and output terminals. By maintaining a constant voltage drop across the pass transistor, it ensures a stable output voltage regardless of variations in the input voltage or load conditions.

Detailed Application Field Plans

LD2985AM47R finds application in various electronic systems that require regulated voltage supply. Some common application fields include:

1. Battery-powered devices: Portable electronics such as smartphones, tablets, and wearable devices benefit from LD2985AM47R's low dropout voltage and low quiescent current, extending battery life.
2. IoT devices: LD2985AM47R can provide stable voltage regulation for sensors, microcontrollers, and communication modules used in Internet of Things (IoT) applications.
3. Automotive electronics: The regulator's wide operating temperature range and thermal shutdown protection make it suitable for automotive applications, including infotainment systems, lighting controls, and engine management systems.

Detailed and Complete Alternative Models

• LD2985BM47R
• LD2985CM47R
• LD2985DM47R
• LD2985EM47R

These alternative models offer similar functionality and specifications to LD2985AM47R, providing flexibility in choosing the most suitable voltage regulator for specific applications.

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