ISL88021IU8HEZ

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High Efficiency - Low Quiescent Current - Wide Input Voltage Range - Adjustable Output Voltage - Overcurrent Protection - Thermal Shutdown Protection

Package: 8-Lead, 2mm x 2mm DFN

Essence: The ISL88021IU8HEZ is a power management IC designed for efficient voltage regulation in various applications.

Packaging/Quantity: The ISL88021IU8HEZ is available in a 8-Lead, 2mm x 2mm DFN package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 0.6V to VIN
• Quiescent Current: 18µA (typical)
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The ISL88021IU8HEZ has the following pin configuration:

```

---

| | | GND | |_______________| | | | VIN | |_______________| | | | EN | |_______________| | | | FB | |_______________| | | | SW | |_______________| | | | PG | |_______________| | | | VOUT | |_______________| | | | LX | |_______________| ```

Functional Features

1. High Efficiency: The ISL88021IU8HEZ offers high efficiency, allowing for optimal power conversion and reduced energy loss.

2. Low Quiescent Current: With a low quiescent current of only 18µA, the IC minimizes power consumption during standby or idle modes.

3. Wide Input Voltage Range: The IC can accept input voltages ranging from 2.7V to 5.5V, making it suitable for various power supply configurations.

4. Adjustable Output Voltage: The output voltage can be adjusted from 0.6V to VIN, providing flexibility in meeting specific application requirements.

5. Overcurrent Protection: The IC incorporates overcurrent protection, safeguarding the circuit from excessive current flow and potential damage.

6. Thermal Shutdown Protection: In case of excessive temperature rise, the thermal shutdown feature activates, preventing overheating and ensuring safe operation.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power consumption. - Wide input voltage range allows for versatile applications. - Adjustable output voltage provides flexibility. - Overcurrent and thermal shutdown protection enhance reliability.

Disadvantages: - Limited pin configuration may restrict certain circuit designs. - Requires external components for complete power management solution.

Working Principles

The ISL88021IU8HEZ operates as a step-down (buck) converter, converting a higher input voltage to a lower output voltage. It utilizes a pulse-width modulation (PWM) control scheme to regulate the output voltage. The feedback (FB) pin monitors the output voltage and adjusts the duty cycle of the internal switch (SW) to maintain the desired voltage level. The enable (EN) pin controls the ON/OFF state of the IC.

Detailed Application Field Plans

The ISL88021IU8HEZ is commonly used in various applications, including but not limited to:

1. Battery-powered devices: The IC efficiently regulates the battery voltage to power different components in portable electronics such as smartphones, tablets, and wearables.

2. Industrial automation: It is suitable for powering sensors, actuators, and control circuits in industrial automation systems, ensuring stable and reliable operation.

3. IoT devices: The IC can be utilized in Internet of Things (IoT) devices, providing efficient power management for sensors, communication modules, and microcontrollers.

4. Automotive electronics: It finds application in automotive systems, enabling efficient voltage regulation for various components like infotainment systems, lighting, and motor control.

Detailed and Complete Alternative Models

1. ISL88021IU8HEZ-T7A: Similar to ISL88021IU8HEZ, but with extended temperature range (-40°C to +125°C).

2. ISL88021IU8HEZ-EVALZ: Evaluation board for ISL88021IU8HEZ, facilitating testing and development of power management solutions.

3. ISL88021IU8HEZCSPZ: Chip-scale package variant of ISL88021IU8HE