LM5035CMH/NOPB

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance, synchronous buck controller
• Package: 20-TSSOP (Thin Shrink Small Outline Package)
• 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
• Maximum Switching Frequency: 1MHz
• Operating Temperature Range: -40°C to +125°C
• Features: Adjustable soft-start, cycle-by-cycle current limit, thermal shutdown protection, frequency synchronization capability

Pin Configuration

The LM5035CMH/NOPB has a 20-pin TSSOP package with the following pin configuration:

1. VIN: Input voltage
2. BOOT: Bootstrap capacitor connection
3. PH: Phase node connection
4. SW: Switching node connection
5. SS/TR: Soft-start/Tracking input
6. FB: Feedback voltage input
7. COMP: Compensation network connection
8. VCC: Supply voltage for internal circuitry
9. GND: Ground reference
10. SYNC: Frequency synchronization input
11. RT/CLK: Oscillator timing resistor/clock synchronization input
12. EN: Enable control input
13. PGND: Power ground reference
14. AGND: Analog ground reference
15. NC: No connection
16. NC: No connection
17. NC: No connection
18. NC: No connection
19. NC: No connection
20. NC: No connection

Functional Features

• High-efficiency synchronous buck controller
• Wide input voltage range for versatile applications
• Adjustable soft-start for controlled power-up
• Cycle-by-cycle current limit for overcurrent protection
• Thermal shutdown protection to prevent overheating
• Frequency synchronization capability for multi-phase operation

Advantages and Disadvantages

Advantages: - High-performance power management solution - Wide input and output voltage range - Efficient power conversion - Comprehensive protection features - Synchronization capability for multi-phase operation

Disadvantages: - Limited pin configuration options - Requires external components for complete functionality

Working Principles

The LM5035CMH/NOPB is a high-performance synchronous buck controller that efficiently converts higher input voltages to lower output voltages. It utilizes a pulse-width modulation (PWM) control scheme to regulate the output voltage. The controller adjusts the duty cycle of the switching transistor to maintain the desired output voltage.

The device incorporates various protection features such as adjustable soft-start, cycle-by-cycle current limit, and thermal shutdown protection. These features ensure safe and reliable operation under different load conditions.

Detailed Application Field Plans

The LM5035CMH/NOPB is widely used in various applications requiring efficient power conversion and management. Some of the common application fields include:

1. Industrial Power Supplies: The controller can be used in industrial power supplies to efficiently convert high input voltages to lower voltages required by different equipment and systems.
2. Telecommunications: It finds applications in telecommunications equipment where it helps regulate power supply voltages for stable and reliable operation.
3. Automotive Electronics: The controller can be utilized in automotive electronics to manage power conversion for various subsystems, such as infotainment systems, lighting, and motor control.
4. Renewable Energy Systems: It can be employed in renewable energy systems like solar inverters and wind turbines to efficiently convert and manage power from renewable sources.

Detailed and Complete Alternative Models

1. LM5116: High-voltage synchronous buck controller with similar features and performance.
2. LM25085: Wide-input voltage range synchronous buck controller with integrated high-side and low-side MOSFETs.
3. TPS54332: Step-down DC-DC converter with integrated FETs and adjustable soft-start.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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