L5972D013TR Integrated Circuits (ICs)

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The L5972D013TR is a DC-DC switching regulator from STMicroelectronics. It is part of the Linear Regulators and Switched Capacitor product family and falls under the category of PMIC – Voltage Regulators – DC DC Switching Regulators. This power management integrated circuit (PMIC) is designed to provide a regulated output voltage and current-mode control over a wide input voltage range. Its features include wide-range input voltage range, accurate output voltage and current regulation over a wide temperature range, low noise, and low ripple and high reliability.

The L5972D013TR is intended to be used in harsh environments, where input voltage transients and EMI/RFI noise are present. It provides robust and stable output voltage when powered from DC sources such as solar panels, wind turbines, small-scale generators, or battery systems. This power management IC has been designed for high-efficiency, high-performance applications such as LED lighting systems, household appliances, small portable electronics, and handheld devices.

The operating principle of the L5972D013TR is based on current-mode control. The regulator senses between its output terminal and power GND. The sensed current is compared to the reference current at the IREF pin, and the differential voltage is used to control the output voltage. In addition, with the built-in compensation network, the regulator will maintain stable output voltage even when the load current varies significantly.

The L5972D013TR incorporates a fixed frequency oscillator and an output stage to regulate the output voltage. The oscillator generates an on/off pattern to control the output stage, which is composed of N-MOS (maximum) and P-MOS transistors. The maximum switch current is set by an external MOSFET, which controls the conduction of the pair of transistors. The transistor pair then provides the necessary power for the load. If the load current exceeds the maximum limit, the regulator shuts down.

The L5972D013TR also includes protection features such as undervoltage, overvoltage, overload, and thermal shutdown. The overvoltage protection shuts down the output voltage when it exceeds a certain limit; the undervoltage protection starts the output voltage when it drops below a certain limit; the overload protection reduces the size of the output current when it exceeds a certain limit, and the thermal shutdown limits the junction temperature. All of these features help to protect the device and maintain a stable output voltage in harsh conditions.

In conclusion, the L5972D013TR is a high-performance DC-DC switching regulator from STMicroelectronics. It is part of the Linear Regulators and Switched Capacitor product family and falls under the category of PMIC – Voltage Regulators – DC DC Switching Regulators. It is intended to be used in harsh environments, where input voltage transients and EMI/RFI noise are present. It provides robust and stable output voltage when powered from DC sources, and incorporates a fixed frequency oscillator and an output stage to regulate the output voltage. Furthermore, it includes protection features such as undervoltage, overvoltage, overload, and thermal shutdown, which help to protect the device and maintain a stable output voltage in harsh conditions.

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