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LD39015M15R Application Field and Working Principle

The LD39015M15R is a low drop voltage regulator manufactured by STMicroelectronics. It is classified as a PMIC (Power Management Integrated Circuit) product and falls into the Voltage Regulators, Linear category. The LD39015M15R is designed to be a low-drop, low-ripple, low-noise, highly efficient regulator for low-power applications, especially suitable for portable applications.

Application Field

The LD39015M15R is well-suited for general-purpose applications such as audio, video, voice, etc., as well as high-efficiency, portable electronic devices. It is also a great choice for ensuring key electronic components are reliably supplied with regulated voltages on embedded systems, particularly in automotive and industrial applications that demand stability, efficiency and reliability.

Operating Parameters

The LD39015M15R is a 3-terminal adjustable regulator that operates over a wide input supply voltage range of 8.0V to 26V and offers programmed output voltages up to 15V, with an accurate voltage regulation of ±1%. It has a wide load regulation range of 1.5A and the low drop-out voltage ensures the output voltage is not compromised even when the device is operating in the most extreme conditions. The device also features a voltage reference that is linear and adjustable. Device temperature is also closely monitored to ensure a stable output voltage over a large temperature range.

Working Principle

The LD39015M15R is a type of linear voltage regulator that works on the principle of controlling the output voltage by regulating the output current. It allows users to adjust the output voltage by controlling the input current. The current flow is regulated through a shunt regulator and a series pass element, both connected between the input and output pins. This provides feedback control of the output voltage, resulting in a low voltage regulation tolerance of ±1%. The low drop-out voltage ensures that the output voltage is not compromised even when the device is operating in extreme conditions.

The LD39015M15R also has a voltage reference that is linear and adjustable, allowing users to adjust the voltage reference to get the desired output voltage. The device also features a temperature-sensing monitor to ensure that the output voltage remains stable over a wide temperature range. The device is protected against reverse-battery, fault and thermal overload conditions. It also has an overtemperature shutdown (OTSD) system that disables the output as soon as the die temperature exceeds the maximum limit.

Conclusion

The LD39015M15R is a low-drop, low-ripple, low-noise, highly efficient linear voltage regulator designed for low-power applications. It is suitable for general-purpose and high-efficiency applications and is also capable of supplying reliable voltages to key components in automotive and industrial applications. It operates over a wide range of input supply voltage, has a wide load regulation, and ensures accurate voltage regulation with a tolerance of ±1%. It also has a temperature-sensing monitor that keeps the output voltage stable over a wide temperature range and is protected against reverse-battery, fault and thermal overload conditions.

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