LD3985J28R

Product Overview

Category

LD3985J28R belongs to the category of voltage regulators.

Use

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

Characteristics

• LD3985J28R is a low-dropout (LDO) voltage regulator.
• It operates with an input voltage range of 2.5V to 6V.
• The output voltage is fixed at 2.8V.
• It has a maximum output current of 150mA.
• LD3985J28R offers high accuracy and low noise performance.
• It is designed for low-power applications.

Package

The LD3985J28R comes in a small SOT-23 package, which is suitable for space-constrained designs.

Essence

The essence of LD3985J28R lies in its ability to provide a stable and regulated output voltage despite variations in the input voltage.

Packaging/Quantity

LD3985J28R is typically available in reels containing a quantity of 3000 units per reel.

Specifications

• Input Voltage Range: 2.5V to 6V
• Output Voltage: 2.8V
• Maximum Output Current: 150mA
• Dropout Voltage: 200mV @ 100mA
• Line Regulation: ±0.1%
• Load Regulation: ±0.3%
• Quiescent Current: 50µA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD3985J28R 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 with small input-output differentials.
• Excellent line and load regulation characteristics maintain stability under varying conditions.
• Low quiescent current minimizes power consumption in standby or idle modes.
• Thermal shutdown and current limit protection features enhance device reliability.

Advantages

• High accuracy and low noise performance ensure reliable voltage regulation.
• Small package size allows for space-saving designs.
• Wide operating temperature range enables usage in various environments.
• Suitable for low-power applications due to its low quiescent current.

Disadvantages

• Limited maximum output current may restrict usage in high-power applications.
• Fixed output voltage may not be suitable for all voltage requirements.

Working Principles

The LD3985J28R operates based on the principle of a linear voltage regulator. It uses a pass transistor to regulate the output voltage by adjusting the resistance between the input and output terminals. This ensures that the output voltage remains constant despite fluctuations in the input voltage.

Detailed Application Field Plans

LD3985J28R finds application in various electronic devices and systems, including but not limited to:

1. Battery-powered devices: It can be used to regulate voltage in portable electronics such as smartphones, tablets, and wearable devices.
2. IoT devices: LD3985J28R is suitable for powering sensors, microcontrollers, and communication modules in Internet of Things (IoT) applications.
3. Automotive electronics: It can be utilized in automotive systems like infotainment systems, navigation units, and engine control units (ECUs).
4. Industrial equipment: LD3985J28R can be employed in industrial automation, control systems, and instrumentation devices.

Detailed and Complete Alternative Models

Some alternative models to LD3985J28R include:

1. LM1117-2.8: A popular LDO voltage regulator with similar specifications and a fixed output voltage of 2.8V.
2. MCP1700-2802E: Another LDO regulator offering a fixed 2.8V output voltage and comparable performance.
3. TS5205-2.8: A low-dropout regulator with a fixed 2.8V output voltage and suitable for low-power applications.

These alternative models provide similar functionality and can be considered as substitutes for LD3985J28R depending on specific requirements.

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