LM5134BMFX/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance synchronous buck controller
• Package: 20-pin VQFN package
• Essence: Efficient power conversion for various applications
• Packaging/Quantity: Tape and reel packaging, quantity varies

Specifications

• Input Voltage Range: 4.5V to 65V
• Output Voltage Range: 0.8V to 93% of input voltage
• Switching Frequency: Up to 1MHz
• Operating Temperature Range: -40°C to +125°C
• Features: Adjustable soft-start, cycle-by-cycle current limit, thermal shutdown protection, etc.

Pin Configuration

The LM5134BMFX/NOPB has a 20-pin VQFN package with the following pin configuration:

1. VIN: Input voltage
2. PGND: Power ground
3. BOOT: Bootstrap capacitor connection
4. SW: Switch node connection
5. COMP: Compensation pin
6. FB: Feedback voltage input
7. SS/TR: Soft-start/tracking control
8. EN: Enable pin
9. RT/CLK: Oscillator frequency setting
10. SYNC: Synchronization input
11. VCC: Supply voltage
12. AGND: Analog ground
13. NC: No connect
14. NC: No connect
15. NC: No connect
16. NC: No connect
17. NC: No connect
18. NC: No connect
19. NC: No connect
20. NC: No connect

Functional Features

• High-efficiency synchronous buck controller
• Wide input voltage range for versatile applications
• Adjustable soft-start for controlled startup
• Cycle-by-cycle current limit for overcurrent protection
• Thermal shutdown protection for enhanced safety
• Frequency synchronization capability for noise reduction

Advantages and Disadvantages

Advantages

• High-performance power conversion
• Wide input voltage range allows flexibility in applications
• Efficient operation with adjustable soft-start and current limit
• Enhanced safety with thermal shutdown protection

Disadvantages

• Limited pin configuration options
• May require additional external components for specific applications

Working Principles

The LM5134BMFX/NOPB is a synchronous buck controller that efficiently converts high input voltages to lower output voltages. It utilizes a switching frequency up to 1MHz to regulate the output voltage. The controller incorporates various features such as soft-start, current limit, and thermal shutdown protection to ensure reliable and safe operation.

Detailed Application Field Plans

The LM5134BMFX/NOPB can be used in a wide range of applications, including but not limited to:

1. Industrial power supplies
2. Automotive electronics
3. Telecommunications equipment
4. LED lighting systems
5. Battery charging circuits
6. Distributed power architectures

Alternative Models

Here are some alternative models that provide similar functionality:

1. LM5117: Synchronous buck controller with integrated MOSFETs
2. LM25066: Dual synchronous buck controller with PMBus interface
3. TPS54332: High-frequency synchronous buck converter
4. LT8610: Silent Switcher® synchronous buck converter
5. MAX20078: Automotive-grade synchronous buck controller

These alternative models offer different features and specifications, allowing users to choose the most suitable option for their specific requirements.

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