LM5115AMT/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Voltage Synchronous Buck Controller
• Package: 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 90V
• Maximum Switching Frequency: 1 MHz
• Operating Temperature Range: -40°C to +125°C
• Features:
  • Adjustable output voltage
  • Synchronous rectification
  • Programmable soft-start
  • Overcurrent protection
  • Thermal shutdown protection

Pin Configuration

The LM5115AMT/NOPB has a 16-pin TSSOP package with the following pin configuration:

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

Functional Features

• Wide input voltage range allows for versatile applications
• High efficiency due to synchronous rectification
• Adjustable output voltage provides flexibility
• Programmable soft-start enables controlled startup
• Overcurrent protection ensures safe operation
• Thermal shutdown protection prevents overheating

Advantages and Disadvantages

Advantages: - Wide input voltage range allows for use in various systems - High efficiency results in reduced power loss - Adjustable output voltage provides flexibility for different loads - Programmable soft-start prevents excessive inrush current - Overcurrent and thermal shutdown protection enhance system safety

Disadvantages: - Limited maximum switching frequency may not be suitable for certain applications - 16-pin TSSOP package may require additional space on the PCB

Working Principles

The LM5115AMT/NOPB is a high voltage synchronous buck controller. It regulates the output voltage by controlling the duty cycle of the high-side and low-side MOSFETs. The controller uses a feedback loop to adjust the duty cycle based on the difference between the desired output voltage and the actual output voltage. Synchronous rectification improves efficiency by reducing power losses during switching.

Application Field Plans

The LM5115AMT/NOPB is commonly used in the following applications:

1. Industrial power supplies
2. Telecom infrastructure
3. Automotive electronics
4. Renewable energy systems
5. LED lighting

Alternative Models

1. LM5116: Similar functionality with higher maximum switching frequency
2. LM5122: Dual-channel synchronous buck controller
3. LM25066: Integrated power management IC with multiple channels

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