ISL6558IB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Regulator
• Characteristics: High-performance, synchronous buck controller
• Package: 28-Lead SOIC (Small Outline Integrated Circuit)
• Essence: Efficient power management solution for various applications
• Packaging/Quantity: Available in tape and reel packaging, quantity depends on supplier

Specifications

• Input Voltage Range: 4.5V to 24V
• Output Voltage Range: 0.6V to 5.5V
• Output Current: Up to 25A
• Switching Frequency: Adjustable from 200kHz to 1MHz
• Operating Temperature Range: -40°C to +85°C
• Features: Overcurrent protection, overvoltage protection, undervoltage lockout, adjustable soft-start, etc.

Pin Configuration

The ISL6558IB has a 28-pin configuration. The pin functions are as follows:

1. VIN: Input voltage
2. BOOT: Bootstrap capacitor connection
3. VCC: Supply voltage for internal circuitry
4. GND: Ground reference
5. COMP: Compensation node for loop stability
6. FB: Feedback voltage input
7. SS/TR: Soft-start/Tracking control
8. SYNC: Synchronization input
9. PGND: Power ground
10. PHASE: Phase node connection
11. LGATE: Low-side MOSFET gate driver output
12. PGATE: Power MOSFET gate driver output
13. AGND: Analog ground
14. RT: Timing resistor connection for switching frequency adjustment
15. CT: Timing capacitor connection for switching frequency adjustment
16. OCSET: Overcurrent protection threshold setting
17. UVLO: Undervoltage lockout threshold setting
18. OVSET: Overvoltage protection threshold setting 19-28. NC: No connection

Functional Features

1. High Efficiency: The ISL6558IB utilizes advanced control techniques to achieve high efficiency in voltage regulation.
2. Wide Input Voltage Range: It can handle input voltages ranging from 4.5V to 24V, making it suitable for a wide range of applications.
3. Adjustable Output Voltage: The output voltage can be adjusted from 0.6V to 5.5V, providing flexibility for different requirements.
4. Protection Mechanisms: The IC incorporates overcurrent protection, overvoltage protection, and undervoltage lockout features to ensure safe operation.
5. Flexible Switching Frequency: The switching frequency can be adjusted from 200kHz to 1MHz, allowing optimization for various applications.

Advantages and Disadvantages

Advantages: - High efficiency leads to reduced power dissipation and improved energy savings. - Wide input voltage range enables compatibility with diverse power sources. - Adjustable output voltage provides versatility for different load requirements. - Protection mechanisms enhance system reliability and prevent damage. - Flexible switching frequency allows optimization for specific applications.

Disadvantages: - Limited availability in certain package options. - Requires careful consideration of external components for optimal performance.

Working Principles

The ISL6558IB is a synchronous buck controller that regulates the output voltage by controlling the duty cycle of the power MOSFETs. It uses a feedback loop to compare the actual output voltage with the desired value and adjusts the duty cycle accordingly. By modulating the switching frequency and duty cycle, it maintains a stable output voltage despite variations in input voltage and load conditions.

Application Field Plans

The ISL6558IB finds application in various fields, including but not limited to: - Power supplies for computer systems - Industrial automation equipment - Telecommunications infrastructure - Consumer electronics - Automotive electronics

Alternative Models

• ISL6558IA: Similar specifications and features, available in a different package (QFN)
• ISL6558IC: Enhanced version with additional protection features and higher current handling capability

Note: This entry provides a brief overview of the ISL6558IB. For more detailed information, please refer to the product datasheet or consult the manufacturer's documentation.

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