ISL9491AERZ

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High efficiency - Low power consumption - Compact size - Wide input voltage range

Package: QFN (Quad Flat No-leads)

Essence: The ISL9491AERZ is a power management IC designed for efficient power conversion and management in various electronic devices.

Packaging/Quantity: The ISL9491AERZ is available in a QFN package and is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 0.6V to 3.3V
• Maximum Output Current: 4A
• Efficiency: Up to 95%
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The ISL9491AERZ has a total of 20 pins, each serving a specific function. Here is the detailed pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. EN: Enable pin
4. FB: Feedback pin
5. SS: Soft-start pin
6. PG: Power good pin
7. VOUT: Output voltage pin
8. BST: Boost pin
9. SW: Switching pin
10. AGND: Analog ground pin
11. COMP: Compensation pin
12. SS/TRK: Soft-start/Tracking pin
13. ISET: Current limit set pin
14. VREF: Reference voltage pin
15. VCC: Supply voltage pin
16. PGND: Power ground pin
17. ILIM: Current limit pin
18. OCSET: Overcurrent protection set pin
19. SS/TRK: Soft-start/Tracking pin
20. VCC: Supply voltage pin

Functional Features

• Wide input voltage range allows compatibility with various power sources.
• High efficiency ensures minimal power loss during conversion.
• Low power consumption enhances overall system performance and battery life.
• Compact size enables integration into space-constrained devices.
• Power good indicator provides feedback on the output voltage status.

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption and heat generation. - Wide input voltage range allows for versatile applications. - Compact size facilitates integration into small form factor devices. - Power good indicator enhances system reliability.

Disadvantages: - Limited maximum output current may not be suitable for high-power applications. - Requires external components for proper operation, increasing complexity.

Working Principles

The ISL9491AERZ operates as a synchronous buck-boost converter, utilizing a combination of high-side and low-side MOSFETs to efficiently convert the input voltage to the desired output voltage. It employs pulse width modulation (PWM) control to regulate the output voltage and maintain stability. The IC incorporates various protection features such as overcurrent protection, thermal shutdown, and undervoltage lockout to ensure safe and reliable operation.

Detailed Application Field Plans

The ISL9491AERZ finds application in a wide range of electronic devices, including but not limited to: - Portable electronic devices (smartphones, tablets, portable media players) - Wearable devices (smartwatches, fitness trackers) - IoT devices - Industrial equipment - Automotive electronics

Detailed and Complete Alternative Models

• ISL9491AERZ-T7A: Similar specifications and features, available in a different package (DFN)
• ISL9491AERZ-T13: Higher maximum output current (6A), otherwise similar specifications and features
• ISL9491AERZ-T18: Lower maximum output current (2A), otherwise similar specifications and features

These alternative models provide flexibility in choosing the most suitable option based on specific application requirements.

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