LM5051MAX/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Voltage, Current Mode Controller
• Package: 16-Pin SOIC (Small Outline Integrated Circuit)
• Essence: Control and regulation of high voltage power supplies
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 100V
• Output Voltage Range: 0.8V to 85V
• Switching Frequency: Up to 2MHz
• Operating Temperature Range: -40°C to +125°C
• Features: Adjustable Soft-Start, Overcurrent Protection, Thermal Shutdown

Pin Configuration

The LM5051MAX/NOPB IC has the following pin configuration:

1. VCC: Power supply input
2. GND: Ground reference
3. FB: Feedback pin for output voltage regulation
4. COMP: Compensation pin for loop stability
5. SS/TR: Soft-start/Tracking control pin
6. RT/CT: Timing components connection pins
7. UVLO: Under-voltage lockout threshold setting
8. EN: Enable pin for device operation
9. PG: Power Good indicator output
10. CS: Current sense input
11. SS/TR: Soft-start/Tracking control pin
12. RT/CT: Timing components connection pins
13. VREF: Reference voltage output
14. VSENSE: Voltage sense input
15. VOUT: Output voltage pin
16. SW: Switching node connection

Functional Features

• High Voltage Operation: The LM5051MAX/NOPB is designed to operate with input voltages ranging from 4.5V to 100V, making it suitable for a wide range of applications.
• Current Mode Control: This IC utilizes current mode control to regulate the output voltage, providing improved stability and transient response.
• Adjustable Soft-Start: The soft-start feature allows for controlled startup of the power supply, reducing inrush current and preventing voltage overshoot.
• Overcurrent Protection: The LM5051MAX/NOPB incorporates overcurrent protection to safeguard the power supply and connected components from excessive current flow.
• Thermal Shutdown: In case of excessive temperature, the thermal shutdown feature activates, protecting the IC from damage.

Advantages and Disadvantages

Advantages: - Wide input voltage range enables versatile application possibilities - Current mode control enhances stability and transient response - Adjustable soft-start reduces inrush current and voltage overshoot - Overcurrent protection ensures system safety - Thermal shutdown prevents IC damage due to excessive temperature

Disadvantages: - Limited to 16-pin SOIC package, which may not be suitable for all applications - High switching frequency may require additional filtering components for noise reduction

Working Principles

The LM5051MAX/NOPB operates by regulating the output voltage based on the feedback received through the FB pin. It uses current mode control to maintain stability and improve transient response. The soft-start feature gradually ramps up the output voltage during startup, preventing excessive inrush current and voltage overshoot. Overcurrent protection safeguards the power supply and connected components by limiting the current flow. In case of excessive temperature, the thermal shutdown feature activates, protecting the IC from damage.

Application Field Plans

The LM5051MAX/NOPB is commonly used in various power management applications, including:

1. Industrial Power Supplies: Provides control and regulation for high voltage power supplies used in industrial equipment.
2. Telecommunications: Used in power management circuits for telecom infrastructure, ensuring stable and efficient power delivery.
3. Automotive Electronics: Enables precise control of power supplies in automotive applications, such as electric vehicles and advanced driver-assistance systems (ADAS).
4. Renewable Energy Systems: Facilitates efficient power conversion and management in renewable energy systems like solar and wind power.

Alternative Models

• LM5050MAX/NOPB
• LM5116Q1MTCX/NOPB
• TPS54332DDAR
• LT3845AEMSE#PBF
• MAX5069CEUE+

These alternative models offer similar functionality and can be considered as substitutes for the LM5051MAX/NOPB in various applications.

In conclusion, the LM5051MAX/NOPB is a high voltage, current mode controller IC used in power management applications. It offers adjustable soft-start, overcurrent protection, and thermal shutdown features. With its wide input voltage range and current mode control, it provides stable and efficient power regulation. The IC finds applications in industrial power supplies, telecommunications, automotive electronics, and renewable energy systems. Alternative models are available for consideration based on specific requirements.