LM5046SQX/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance synchronous buck controller
• Package: 20-pin WQFN package
• Essence: Efficiently regulates voltage in power management applications
• Packaging/Quantity: Available in tape and reel packaging, quantity varies

Specifications

• Input Voltage Range: 4.5V to 100V
• Output Voltage Range: 0.8V to 90% of input voltage
• Switching Frequency: Up to 2MHz
• Maximum Duty Cycle: 95%
• Operating Temperature Range: -40°C to +125°C
• Features: Adjustable soft-start, adjustable current limit, thermal shutdown protection, etc.

Pin Configuration

The LM5046SQX/NOPB has a 20-pin configuration with the following pinout:

1. VIN: Input voltage
2. VCC: Controller supply voltage
3. BOOT: Bootstrap capacitor connection
4. PH: Power high-side MOSFET gate drive
5. LGND: Logic ground
6. PGND: Power ground
7. COMP: Error amplifier output
8. FB: Feedback voltage input
9. SS/TR: Soft-start/tracking control
10. EN: Enable control
11. RT/CLK: Oscillator timing resistor/clock synchronization
12. SYNC: External synchronization input
13. OCSET: Overcurrent threshold setting
14. ISENSE+: Positive current sense input
15. ISENSE-: Negative current sense input
16. AGND: Analog ground
17. SS/TRIM: Soft-start timing capacitor connection
18. UVLO: Undervoltage lockout
19. OVP: Overvoltage protection
20. VREF: Reference voltage output

Functional Features

• High-performance synchronous buck controller
• Wide input voltage range for versatile applications
• Adjustable soft-start for controlled startup
• Adjustable current limit for protection against overcurrent conditions
• Thermal shutdown protection to prevent overheating
• External synchronization capability for system integration

Advantages and Disadvantages

Advantages

• Efficient voltage regulation in power management applications
• Wide input voltage range allows for flexibility in various systems
• Adjustable features provide customization options
• Comprehensive protection mechanisms ensure safe operation

Disadvantages

• Limited to buck converter applications, not suitable for other topologies
• Requires external components for complete power management solution

Working Principles

The LM5046SQX/NOPB is a high-performance synchronous buck controller that regulates voltage in power management applications. It operates by controlling the duty cycle of the power high-side MOSFET to achieve the desired output voltage. The controller incorporates various features such as adjustable soft-start, current limit, and thermal shutdown protection to ensure reliable and efficient operation.

Application Field Plans

The LM5046SQX/NOPB is commonly used in the following application fields:

1. Power supplies for industrial equipment
2. Telecommunications infrastructure
3. Automotive electronics
4. Renewable energy systems
5. Server and data center power management

Alternative Models

For similar functionality and performance, the following alternative models can be considered:

1. LM5117: Synchronous buck controller with integrated high-side and low-side MOSFET drivers
2. LM25066: Dual synchronous buck controller with adjustable frequency and phase shift
3. TPS53632: D-CAP+™ mode synchronous buck controller with advanced control features

These alternative models offer comparable features and can be suitable replacements depending on specific requirements.

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