LD39030ADTPU18R

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: Low Dropout Regulator
• Package: DFN (Dual Flat No-Lead)
• Essence: Voltage Regulator
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Input Voltage Range: 2.5V to 6.5V
• Output Voltage Range: 1.8V
• Maximum Output Current: 300mA
• Dropout Voltage: 200mV at 100mA
• Quiescent Current: 50µA
• Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD39030ADTPU18R has the following pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. EN: Enable pin
4. VOUT: Output voltage pin
5. BYP: Bypass capacitor pin

Functional Features

• Low dropout voltage for efficient power management
• Wide input voltage range allows flexibility in power supply selection
• Low quiescent current for power-saving applications
• Enable pin for easy on/off control
• Bypass capacitor pin for improved stability

Advantages and Disadvantages

Advantages: - Low dropout voltage ensures efficient power conversion - Wide input voltage range provides flexibility in power supply options - Low quiescent current enables power-saving applications - Enable pin allows easy control of the regulator - Bypass capacitor pin enhances stability

Disadvantages: - Limited output current capacity (maximum 300mA) - Only supports fixed output voltage (1.8V)

Working Principles

The LD39030ADTPU18R is a low dropout voltage regulator that provides a stable output voltage of 1.8V, even when the input voltage varies within the range of 2.5V to 6.5V. It achieves this by utilizing a pass transistor and feedback mechanism to regulate the output voltage.

When the input voltage is applied, the regulator compares it with a reference voltage and adjusts the pass transistor accordingly to maintain a constant output voltage. The dropout voltage, which is the minimum voltage difference between the input and output, is kept low to minimize power dissipation.

Detailed Application Field Plans

The LD39030ADTPU18R is commonly used in various applications where a stable 1.8V power supply is required. Some typical application fields include:

1. Battery-powered devices: Portable electronics, such as smartphones, tablets, and wearable devices, often require a low dropout regulator to efficiently manage power consumption.
2. Industrial control systems: The LD39030ADTPU18R can be used in industrial automation, robotics, and other control systems that demand a reliable and regulated power source.
3. Automotive electronics: With its wide input voltage range and ability to operate in harsh environments, this regulator is suitable for automotive applications like infotainment systems, lighting controls, and sensors.

Detailed and Complete Alternative Models

• LD1117S33CTR: Low dropout voltage regulator with adjustable output voltage (1.25V to 13.8V) and maximum output current of 800mA.
• LM317T: Adjustable voltage regulator with a wide input voltage range (3V to 40V) and maximum output current of 1.5A.
• LP2985-18DBVR: Fixed output voltage regulator (1.8V) with low dropout voltage and maximum output current of 150mA.

These alternative models offer different features and specifications, providing options for various power management requirements.

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