LM5115AMTX/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Voltage Synchronous Buck Controller
• Package: Surface Mount, 16-TSSOP
• Essence: Efficient power conversion and management
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 100V
• Output Voltage Range: 0.8V to 85V
• Switching Frequency: Up to 1MHz
• Maximum Duty Cycle: 90%
• Operating Temperature Range: -40°C to +125°C
• Features: Adjustable soft-start, adjustable current limit, thermal shutdown, UVLO protection

Detailed Pin Configuration

The LM5115AMTX/NOPB IC has a 16-pin TSSOP package with the following pin configuration:

1. VIN: Input voltage
2. BOOT: Bootstrap capacitor connection for high-side gate driver
3. PH: Phase node connection for high-side MOSFET
4. PGND: Power ground
5. COMP: Compensation pin for loop stability
6. SS/TR: Soft-start/Tracking input
7. FB: Feedback voltage input
8. EN: Enable pin
9. VCC: Supply voltage for internal circuitry
10. AGND: Analog ground
11. RT: Oscillator timing resistor
12. CT: Oscillator timing capacitor
13. SW: Switch node connection for low-side MOSFET
14. LGND: Logic ground
15. PG: Power good output
16. SS/TR: Soft-start/Tracking output

Functional Features

• High voltage operation allows wide input voltage range
• Synchronous rectification improves efficiency
• Adjustable soft-start for controlled startup
• Adjustable current limit for protection
• Thermal shutdown prevents overheating
• Under-voltage lockout (UVLO) protection

Advantages and Disadvantages

Advantages: - Wide input voltage range enables versatile applications - High efficiency due to synchronous rectification - Protection features enhance reliability - Adjustable parameters provide flexibility

Disadvantages: - Limited output voltage range compared to some other models - Requires external components for complete functionality

Working Principles

The LM5115AMTX/NOPB is a high voltage synchronous buck controller. It operates by regulating the duty cycle of the switching MOSFETs to convert a higher input voltage to a lower output voltage efficiently. The synchronous rectification mechanism reduces power losses, resulting in improved overall efficiency.

The IC incorporates various protection features such as adjustable current limit, thermal shutdown, and under-voltage lockout (UVLO) to ensure safe operation and prevent damage to the circuitry.

Detailed Application Field Plans

The LM5115AMTX/NOPB finds applications in various fields, including but not limited to:

1. Industrial power supplies
2. Automotive electronics
3. Renewable energy systems
4. Telecommunications equipment
5. LED lighting
6. Battery charging systems

Its wide input voltage range, high efficiency, and protection features make it suitable for diverse power management applications.

Detailed and Complete Alternative Models

1. LM5116AMTX/NOPB: Similar to LM5115AMTX/NOPB with extended input voltage range up to 140V.
2. LM5122AMTX/NOPB: Dual-channel synchronous buck controller with adjustable frequency and phase shift capability.
3. LM5124AMTX/NOPB: Quad-channel synchronous buck controller with integrated gate drivers.

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

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