Texas Instruments LM2576HV Switching Regulator, Step-Down, Fixed 5V Output - 40V 12V

The Texas Instruments LM2576HVS-5.0/NOPB is a SIMPLE SWITCHER® step-down (buck) regulator engineered for high efficiency and simplicity of design. Capable of driving a 3A load with excellent line and load regulation, it provides a robust and reliable 5V power supply solution from a wide input voltage range of 4V to 60V. This monolithic regulator integrates all active functions, including a fixed-frequency oscillator and internal frequency compensation, significantly reducing external component count and simplifying your switch-mode power supply design.

A standout feature is its high efficiency, which makes it an excellent replacement for traditional three-terminal linear regulators. By minimising power dissipation, it substantially reduces the size of the required heat sink; in many applications, no heat sink is needed at all. This not only saves space but also lowers overall system cost and complexity. The regulator operates at a fixed 52kHz switching frequency, and a standard series of readily available inductors from multiple manufacturers are optimised for use with it, further easing the selection process.

Key Features & Protection

The LM2576HV includes comprehensive protection features for safe and reliable operation. It offers thermal shutdown and current limit protection to safeguard both the regulator and your circuit under fault conditions. Additionally, it features TTL-compatible shutdown capability, allowing for external control to put the device into a low-power standby mode, which is ideal for power-sensitive applications.

With a requirement of only four external components, this regulator is exceptionally simple to implement. Its surface-mount TO-263-5 package is designed for robust performance in a compact footprint. The device is specified for operation over a wide industrial temperature range from -40°C to 125°C, ensuring stability in demanding environments.

Applications

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Variant Details

• Size: 40V 12V