The LM2596HVT-3.3 is a step-down (buck) switching voltage regulator manufactured by HGSEMI. It's designed to efficiently convert a higher DC input voltage to a lower, fixed 3.3V DC output voltage. The 'HVT' indicates a High Voltage Through-hole package version, signifying a higher input voltage capability and a through-hole mounting style, offering robust mechanical stability.

Applications

• Microcontroller power supplies (3.3V)
• FPGA power supplies (3.3V)
• Logic circuits requiring 3.3V
• Embedded systems
• Industrial control systems
• Point-of-load regulation
• Battery-powered devices

Features

• Fixed 3.3V output voltage
• High voltage input range (HVT version)
• High efficiency (typically >80%)
• Internal oscillator with fixed frequency
• Thermal shutdown protection
• Current limit protection
• ON/OFF control input
• Low standby current
• Requires few external components
• Through-hole TO-220 package

Benefits

• Efficient Power Conversion: High efficiency minimizes power loss and heat generation, enabling cooler operation and longer battery life.
• Simplified Design: Requires minimal external components, reducing board space and BOM cost.
• Wide Input Voltage Range: The HVT version provides flexibility in input voltage selection, accommodating a wide range of power sources.
• Reliable Operation: Built-in protection features (thermal shutdown, current limiting) prevent damage due to over-temperature or over-current conditions, enhancing system reliability.
• Easy Power Management: The ON/OFF control input allows for convenient power sequencing and power saving during idle periods.
• Robust Mounting: The through-hole TO-220 package provides a secure and mechanically stable connection to the PCB, suitable for harsh environments.

Additional Details

The LM2596HVT-3.3 operates at a fixed switching frequency (typically around 150 kHz). The output voltage is fixed at 3.3V and is not adjustable. Proper PCB layout is crucial for minimizing noise and ensuring stable operation. Keep the input capacitor close to the input and ground pins of the regulator. A heat sink might be required depending on the input voltage, output current, and ambient temperature. Refer to the device datasheet for specific details regarding component selection (inductor, capacitors) and layout recommendations. The thermal resistance of the TO-220 package must be considered to prevent overheating.