ISL8843MBZ-T

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Regulator

Characteristics: - High efficiency - Wide input voltage range - Low dropout voltage - Adjustable output voltage - Overcurrent protection - Thermal shutdown protection

Package: SOIC-8

Essence: The ISL8843MBZ-T is a voltage regulator IC designed for various applications requiring stable and regulated power supply.

Packaging/Quantity: The ISL8843MBZ-T is available in tape and reel packaging, with 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: 0.8V to 5.5V
• Output Current: Up to 3A
• Dropout Voltage: 200mV at 1A
• Quiescent Current: 120µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The ISL8843MBZ-T has the following pin configuration:

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| | --| EN | --| FB | --| COMP | --| GND | --| SW | --| VIN | --| VOUT | |___________| ```

Functional Features

1. High Efficiency: The ISL8843MBZ-T offers high efficiency, minimizing power loss and maximizing energy conversion.
2. Wide Input Voltage Range: It can operate within a wide input voltage range, making it suitable for various applications.
3. Low Dropout Voltage: The regulator maintains a low dropout voltage, ensuring stable output even when the input voltage is close to the output voltage.
4. Adjustable Output Voltage: The output voltage can be adjusted according to the specific requirements of the application.
5. Overcurrent Protection: The IC incorporates overcurrent protection, safeguarding the circuit from excessive current flow.
6. Thermal Shutdown Protection: It includes thermal shutdown protection to prevent damage due to overheating.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Wide input voltage range allows for versatile usage. - Low dropout voltage ensures stable output. - Adjustable output voltage provides flexibility. - Overcurrent and thermal shutdown protection enhance safety.

Disadvantages: - Limited output current capacity (up to 3A). - Requires external components for complete voltage regulation.

Working Principles

The ISL8843MBZ-T operates as a step-down voltage regulator. It takes an input voltage within the specified range and converts it to a lower, regulated output voltage. The feedback pin (FB) monitors the output voltage and adjusts the duty cycle of the internal switch (SW) to maintain the desired output voltage. The compensation pin (COMP) helps stabilize the control loop and improve transient response.

Detailed Application Field Plans

The ISL8843MBZ-T is widely used in various applications, including but not limited to: 1. Power supplies for consumer electronics 2. Industrial automation systems 3. Automotive electronics 4. LED lighting systems 5. Battery charging circuits 6. Telecommunications equipment

Detailed and Complete Alternative Models

1. LM2596S-ADJ: Similar voltage regulator IC with adjustable output voltage and high efficiency.
2. TPS5430: Step-down voltage regulator with wide input voltage range and integrated power MOSFETs.
3. LT1763: Low dropout voltage regulator with adjustable output voltage and low quiescent current.
4. AP1509: Voltage regulator IC with overcurrent protection and thermal shutdown features.
5. MAX5033: High-efficiency step-down voltage regulator with adjustable output voltage and wide input voltage range.

These alternative models offer similar functionalities and can be considered as substitutes for the ISL8843MBZ-T in various applications.

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