A High Temperature Voltage Regulator is a precision voltage-stabilizing circuit specifically designed for operation in high-temperature and wide-temperature environments. The so-called linear power supply is defined relative to switching power supplies. It usually consists of a reference voltage source, a voltage comparison unit, a feedback amplifier, and a series pass transistor (bipolar transistor or field-effect transistor). Compared with switching power supplies, linear voltage regulators are characterized by simple use, low noise, and high temperature resistance. We can take the LHVR series high-temperature dual-channel linear voltage regulators, commonly used in logging tool circuits, as an example.
Features of the LHVR Series High-Temperature Dual-Channel Linear Voltage Regulators
- High temperature resistance: Maximum operating case temperature: 235℃/250℃/275℃.
- High reliability: Operates for more than 500 hours at the maximum case temperature.
- Easy installation and good heat dissipation: The shell is insulated and can be directly mounted on the logging tool frame.
- Customizable output voltage (subject to minimum order quantity requirements).
Process Advantages of the LHVR Series High-Temperature Dual-Channel Linear Voltage Regulators
- The substrate is made of aluminum oxide ceramics, which is soldered to the tungsten-copper shell using solder with a melting point of up to 296℃, ensuring excellent heat dissipation and reliable connection.
- The conductor material on the substrate is gold, which guarantees long-term stability at high temperatures.
- Devices use bare chips (DIE) directly mounted on the substrate and interconnected through a bonding process, providing strong reliability and vibration resistance.
- Discrete transistor components are used in the circuit. When operating at high temperatures, discrete transistors offer higher reliability and lower leakage current compared to conventional integrated chips.
- Hermetic packaging: The interior of the package is filled with high-purity nitrogen, ensuring long-term reliability of internal devices in harsh environments.