ISL6551IB

Product Overview

Category

ISL6551IB belongs to the category of integrated circuits (ICs).

Use

The ISL6551IB is commonly used as a voltage regulator in various electronic devices and systems.

Characteristics

• The IC provides precise voltage regulation, ensuring stable power supply.
• It offers high efficiency, reducing power consumption.
• The device has built-in protection features such as overvoltage and overcurrent protection.
• It operates at a wide input voltage range, making it suitable for different applications.

Package

ISL6551IB is available in a small outline integrated circuit (SOIC) package.

Essence

The essence of ISL6551IB lies in its ability to regulate voltage effectively, providing reliable power supply to electronic components.

Packaging/Quantity

The IC is typically sold in reels or tubes containing a specific quantity, usually 250 or 1000 units per package.

Specifications

• Input Voltage Range: 4.5V to 25V
• Output Voltage Range: 0.8V to 6V
• Maximum Output Current: 10A
• Switching Frequency: 300kHz to 1MHz
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The ISL6551IB has a total of 16 pins. Here is the detailed pin configuration:

1. VIN: Input voltage pin
2. GND: Ground pin
3. FB: Feedback pin for voltage regulation
4. COMP: Compensation pin for stability control
5. SS/TR: Soft-start/Tracking pin
6. VCC: Power supply pin for internal circuitry
7. PGND: Power ground pin
8. BOOT: Bootstrap capacitor connection pin
9. LX: Switching node pin
10. PHASE: Phase connection pin
11. VSENSE: Current sense pin
12. ITH: Current limit threshold pin
13. OCSET: Overcurrent protection threshold pin
14. SS/TR2: Additional soft-start/tracking pin
15. RT: External resistor connection for switching frequency control
16. SYNC: Synchronization input pin

Functional Features

• Precise voltage regulation ensures stable power supply to connected devices.
• High efficiency reduces power consumption and minimizes heat dissipation.
• Built-in protection features such as overvoltage and overcurrent protection safeguard the system from potential damage.
• Soft-start functionality allows gradual ramp-up of output voltage, preventing sudden voltage spikes.
• Synchronization capability enables synchronization with an external clock source.

Advantages and Disadvantages

Advantages

• Provides precise voltage regulation
• High efficiency
• Built-in protection features
• Wide input voltage range

Disadvantages

• Limited maximum output current (10A)
• Requires external components for operation

Working Principles

The ISL6551IB operates based on a pulse-width modulation (PWM) control scheme. It regulates the output voltage by adjusting the duty cycle of the internal switch. The feedback mechanism continuously monitors the output voltage and compares it with the desired value. Any deviation is corrected by adjusting the duty cycle accordingly. This process ensures a stable and accurate output voltage.

Detailed Application Field Plans

The ISL6551IB finds applications in various fields, including: - Power supplies for computer systems - Industrial automation equipment - Telecommunications devices - Automotive electronics - Consumer electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the ISL6551IB include: - LM2576-ADJ - LT1083CP - TPS5430DDAR - MAX5035BASA

These models can be considered as alternatives depending on specific requirements and design constraints.

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