LD1085DT18R

Product Overview

Category: Voltage Regulator
Use: To regulate and stabilize voltage in electronic circuits
Characteristics:
- High precision and low dropout voltage
- Wide input voltage range
- Adjustable output voltage
- Overcurrent and thermal protection
Package: TO-220 package
Essence: A voltage regulator designed for various applications
Packaging/Quantity: Available in reels or tubes, quantity depends on supplier

Specifications

Input Voltage Range: 4.75V to 20V
Output Voltage Range: 1.25V to 18V
Output Current: Up to 3A
Dropout Voltage: 1.15V (typical)
Line Regulation: ±0.2% (typical)
Load Regulation: ±0.4% (typical)
Operating Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The LD1085DT18R has three pins:

Input (VIN): Connects to the input voltage source.
Ground (GND): Connected to the ground reference.
Output (VOUT): Provides the regulated output voltage.

Functional Features

High Precision: The LD1085DT18R offers high precision voltage regulation, ensuring stable and accurate output.
Low Dropout Voltage: With a low dropout voltage, it can maintain regulation even when the input voltage is close to the desired output voltage.
Wide Input Voltage Range: It can accept a wide range of input voltages, making it suitable for various applications.
Adjustable Output Voltage: The output voltage can be adjusted within the specified range using external resistors.
Overcurrent and Thermal Protection: The regulator incorporates protection features to prevent damage from excessive current or temperature.

Advantages and Disadvantages

Advantages: - High precision voltage regulation - Wide input voltage range - Adjustable output voltage - Overcurrent and thermal protection

Disadvantages: - Dropout voltage may limit its use in low voltage applications - Requires external components for adjustment and filtering

Working Principles

The LD1085DT18R is a linear voltage regulator that uses a pass transistor to regulate the output voltage. It compares the output voltage with a reference voltage and adjusts the pass transistor accordingly to maintain a stable output. The dropout voltage is the minimum voltage difference required between the input and output for proper regulation.

Detailed Application Field Plans

The LD1085DT18R can be used in various applications, including: 1. Power supplies for microcontrollers and digital circuits 2. Battery charging circuits 3. Automotive electronics 4. Industrial control systems 5. Audio amplifiers

Detailed and Complete Alternative Models

LM317T: A popular adjustable voltage regulator with similar specifications.
LT1085CT: Offers higher output current capability while maintaining low dropout voltage.
LM1117-ADJ: Low dropout voltage regulator with adjustable output voltage.

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

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LD1085DT18R v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LD1085DT18R in technical solutions:

Q: What is LD1085DT18R? A: LD1085DT18R is a voltage regulator IC that provides a fixed output voltage of 1.8V.
Q: What is the maximum input voltage for LD1085DT18R? A: The maximum input voltage for LD1085DT18R is 30V.
Q: What is the maximum output current LD1085DT18R can handle? A: LD1085DT18R can handle a maximum output current of 3A.
Q: Can LD1085DT18R be used in both step-up and step-down applications? A: No, LD1085DT18R is a linear voltage regulator and can only be used for step-down applications.
Q: Is an external heat sink required for LD1085DT18R? A: It depends on the power dissipation. If the power dissipation exceeds the specified limit, an external heat sink may be required.
Q: What is the dropout voltage of LD1085DT18R? A: The dropout voltage of LD1085DT18R is typically around 1.5V.
Q: Can LD1085DT18R operate with a ceramic output capacitor? A: Yes, LD1085DT18R can operate with a ceramic output capacitor, but it is recommended to use an electrolytic or tantalum capacitor for better stability.
Q: Does LD1085DT18R have built-in overcurrent protection? A: No, LD1085DT18R does not have built-in overcurrent protection. External current limiting circuitry may be required.
Q: Can LD1085DT18R be used in battery-powered applications? A: Yes, LD1085DT18R can be used in battery-powered applications as long as the input voltage does not exceed 30V.
Q: What is the typical quiescent current of LD1085DT18R? A: The typical quiescent current of LD1085DT18R is around 5mA.

Please note that these answers are general and may vary depending on specific application requirements. It is always recommended to refer to the datasheet and consult the manufacturer for accurate information.