LD3985M29R

Product Overview

Category

LD3985M29R 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

LD3985M29R comes in a small SOT-23 package.

Essence

The essence of LD3985M29R lies in its ability to provide stable and regulated voltage output.

Packaging/Quantity

It is typically packaged in reels, with each reel containing a specific quantity of LD3985M29R units.

Specifications

• Input Voltage Range: 2.5V - 6V
• Output Voltage: 2.9V
• Dropout Voltage: 200mV (typical)
• Quiescent Current: 50µA (typical)
• Output Current: Up to 150mA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

LD3985M29R has three pins:

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

Functional Features

• Low dropout voltage ensures efficient regulation even when the input voltage is close to the desired output voltage.
• Low quiescent current minimizes power consumption during standby or idle conditions.
• High output voltage accuracy provides precise voltage regulation for sensitive electronic components.
• Thermal shutdown protection prevents damage due to excessive temperature.
• Short-circuit current limit protects the regulator and connected devices from excessive current flow.

Advantages and Disadvantages

Advantages

• Small package size allows for space-efficient integration into electronic circuits.
• Wide operating temperature range enables usage in various environmental conditions.
• Low dropout voltage ensures efficient power conversion.
• Thermal shutdown protection enhances reliability.

Disadvantages

• Limited output current capacity may restrict usage in high-power applications.
• Higher cost compared to some alternative models.

Working Principles

LD3985M29R 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. This allows it to maintain a stable output voltage even when the input voltage fluctuates.

Detailed Application Field Plans

LD3985M29R finds application in various electronic devices, including but not limited to: - Battery-powered devices - Portable audio players - Mobile phones - Wearable devices - IoT modules

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to LD3985M29R are: - LM1117-2.9 - MCP1700-2902E/TO - XC6209B292MR-G

These models offer similar functionality and characteristics, providing options for different design requirements.

In conclusion, LD3985M29R is a voltage regulator with low dropout voltage, high accuracy, and thermal protection. Its small package size and wide operating temperature range make it suitable for various applications. However, its limited output current capacity and relatively higher cost should be taken into consideration when selecting an alternative model.