ISL9021II3Z-T

Product Overview

Category

ISL9021II3Z-T belongs to the category of integrated circuits (ICs).

Use

It is commonly used as a voltage regulator in various electronic devices.

Characteristics

• Low dropout voltage
• High output accuracy
• Low quiescent current
• Thermal shutdown protection
• Short-circuit protection

Package

ISL9021II3Z-T is available in a small and compact SOT-23 package.

Essence

The essence of ISL9021II3Z-T lies in its ability to regulate voltage efficiently and accurately, ensuring stable power supply for electronic devices.

Packaging/Quantity

ISL9021II3Z-T is typically packaged in reels, with each reel containing a specific quantity of ICs. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Input Voltage Range: 2.5V to 6.0V
• Output Voltage Range: 1.2V to 5.5V
• Dropout Voltage: 200mV at 300mA
• Quiescent Current: 17µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

ISL9021II3Z-T has the following pin configuration:

1. VIN (Input Voltage)
2. GND (Ground)
3. VOUT (Output Voltage)

Functional Features

• Low Dropout Voltage: The low dropout voltage ensures efficient regulation even when the input voltage is close to the desired output voltage.
• High Output Accuracy: ISL9021II3Z-T provides high output accuracy, minimizing voltage fluctuations and ensuring stable performance of connected devices.
• Low Quiescent Current: The low quiescent current helps conserve power and extend battery life in portable applications.
• Thermal Shutdown Protection: The IC incorporates thermal shutdown protection, preventing damage due to excessive heat.
• Short-Circuit Protection: ISL9021II3Z-T features built-in short-circuit protection, safeguarding the device and connected components from potential damage.

Advantages and Disadvantages

Advantages

• Efficient voltage regulation
• High output accuracy
• Low power consumption
• Thermal and short-circuit protection

Disadvantages

• Limited input voltage range (2.5V to 6.0V)
• Relatively small package size may require careful handling during assembly

Working Principles

ISL9021II3Z-T operates based on the principle of feedback control. It compares the output voltage with a reference voltage and adjusts the internal circuitry to maintain the desired output voltage. By continuously monitoring and adjusting, it ensures a stable and regulated output voltage despite variations in the input voltage or load conditions.

Detailed Application Field Plans

ISL9021II3Z-T finds applications in various electronic devices that require stable and regulated power supply. Some common application fields include:

1. Mobile phones and smartphones
2. Portable media players
3. Wearable devices
4. Battery-powered IoT devices
5. Embedded systems

Detailed and Complete Alternative Models

There are several alternative models available in the market that offer similar functionality to ISL9021II3Z-T. Some notable alternatives include:

1. LM1117-3.3: A popular voltage regulator IC with a fixed output voltage of 3.3V.
2. LT1763: A low dropout linear regulator with adjustable output voltage.
3. TPS7A4700: An ultra-low noise, high PSRR (Power Supply Rejection Ratio) LDO voltage regulator.

These alternative models provide options for different output voltages, current capabilities, and additional features, allowing designers to choose the most suitable solution for their specific requirements.

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