LD3980PU08R

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: Low Dropout, 800mA Output Current, Adjustable Output Voltage, Ultra-Low Quiescent Current
• Package: TO-252-3 (DPAK)
• Essence: LD3980PU08R is a voltage regulator IC that provides a stable output voltage with low dropout voltage. It is commonly used in various electronic devices to regulate and stabilize the voltage supply.
• Packaging/Quantity: The LD3980PU08R is typically sold in reels or tubes containing a specific quantity of ICs.

Specifications

• Output Voltage Range: Adjustable from 1.2V to 5.5V
• Output Current: Up to 800mA
• Dropout Voltage: Typically 300mV at 800mA
• Quiescent Current: Ultra-low quiescent current of typically 30µA
• Input Voltage Range: 2.5V to 6V
• Operating Temperature Range: -40°C to +125°C
• Protection Features: Overcurrent Protection, Thermal Shutdown, Reverse Polarity Protection

Detailed Pin Configuration

The LD3980PU08R has three pins:

1. VIN (Pin 1): Input voltage pin. Connects to the power supply.
2. GND (Pin 2): Ground reference pin. Connected to the system ground.
3. VOUT (Pin 3): Output voltage pin. Connects to the load or circuit requiring regulated voltage.

Functional Features

• Voltage Regulation: The LD3980PU08R regulates the output voltage within a specified range, ensuring a stable power supply for connected devices.
• Low Dropout Voltage: The IC has a low dropout voltage, minimizing power loss and maximizing efficiency.
• Adjustable Output Voltage: The output voltage can be adjusted within the range of 1.2V to 5.5V, providing flexibility for different applications.
• Ultra-Low Quiescent Current: LD3980PU08R features an ultra-low quiescent current, reducing power consumption in standby or idle modes.
• Protection Features: The IC incorporates overcurrent protection, thermal shutdown, and reverse polarity protection to safeguard the circuit and connected devices.

Advantages and Disadvantages

Advantages: - Stable and regulated output voltage - Low dropout voltage for efficient power conversion - Adjustable output voltage for versatility - Ultra-low quiescent current for reduced power consumption - Protection features enhance reliability and safety

Disadvantages: - Limited maximum output current (800mA) - Requires external components for proper operation

Working Principles

The LD3980PU08R is a linear voltage regulator that operates by comparing the output voltage with a reference voltage. It adjusts the resistance between the input and output pins to maintain a stable output voltage, compensating for changes in load or input voltage. The dropout voltage is minimized to ensure efficient power conversion.

Detailed Application Field Plans

The LD3980PU08R finds applications in various electronic systems where a stable and regulated voltage supply is required. Some common application fields include:

1. Portable Devices: Used in battery-powered devices such as smartphones, tablets, and portable media players to regulate the voltage supplied to the internal circuits.
2. Embedded Systems: Integrated into embedded systems like microcontrollers, IoT devices, and industrial automation equipment to provide a stable power source.
3. Automotive Electronics: Employed in automotive applications such as infotainment systems, navigation units, and engine control modules to regulate voltage for reliable operation.
4. Consumer Electronics: Utilized in consumer electronics like digital cameras, audio/video equipment, and gaming consoles to ensure consistent power supply.
5. Telecommunications: Incorporated into telecommunications equipment such as routers, switches, and base stations for voltage regulation and stability.

Detailed and Complete Alternative Models

1. LM1117-3.3: A popular alternative with a fixed output voltage of 3.3V and similar characteristics.
2. LT1763: Another alternative offering adjustable output voltage and low dropout voltage.
3. TPS7A4700: An alternative model with higher output current capability and additional protection features.

These alternative models provide similar functionality and can be considered based on specific requirements and design considerations.

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