L4952D

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The L4952D is an integrated low-drop voltage regulator that has multiple applications, including powering microcontroller units (MCUs) and devices with very low quiescent current and excellent output accuracy in a very small package. The L4952D is a special purpose voltage regulator that is suitable for both regulated and non-regulated power supplies. It is especially suitable for powering MCUs, RISC processors, and mobile applications that require precise output voltages.

Applications

The L4952D application field covers the most popular linear regulator applications such as providing power to microcontrollers, RISC processors, or memory chips with precise regulated output voltages; driving logic systems; general purpose fixed voltage regulation; and charging batteries. Its adjustable output voltage range makes the device suitable for many other applications where precise regulation is needed, such as powering high-frequency voltage control oscillators, audio amplifiers, clock visualizations, and precision control loops.

In addition, the L4952D is also a good choice for applications in loop-stabilized systems and battery charging systems. It can also be used in small scale motor and motor control systems. Other applications for the L4952D include energy management in low power battery-operated consumer devices where low quiescent current and high precision are essential.

Features

The L4952D features low drop-out voltage, excellent output accuracy and stability, low quiescent current, low noise, high level of temperature compensation, and external current sensing capability. Its wide input voltage range (3 V to 26 V) makes it suitable for a wide range of applications, including portable and automotive solutions. The adjustable output voltage range (1.24 V to 6 V) allows the device to be used in systems that require precise regulation over a wide range of voltage values.

The onboard low dropout regulator core and wide input voltage range are the two main features of the device. This facilitates a wide electrical margin for load transient protection and load sharing. The L4952D also includes an extensive array of protective features, including overvoltage protection, reverse current protection and over-temperature protection.

Working Principle

The L4952D is a low drop-out linear voltage regulator that works with an internal linear regulator core. It uses the difference between the input and output voltages to adjust the output voltage of the device. When the output voltage drops due to increased load current, the device will draw more current from the input and increase its output voltage. This results in an excellent line and load regulation of the output voltage. The reverse current protection minimizes the power dissipation in the device and prevent reverse flow of current into the input.

The L4952D also features an integrated, low drop-out NFET switch to enable the device when the input voltage reaches the specified minimum operating voltage. The device is connected to the load through the NFET switch, enabling the regulator to supply power to the load at the desired voltage. The regulator also contains a temperature compensation circuit for improved output accuracy over a wide temperature range.

Conclusion

The L4952D integrated low drop-out voltage regulator is suitable for a variety of applications that require precise regulation of the output voltage while consuming a minimal amount of power. Its wide input voltage range and adjustable output voltage range make it a good choice for powering MCUs, RISC processors, and other battery-powered applications. The device also features an integrated NFET switch, low drop-out regulator core, and low quiescent current, making it an ideal choice for battery charging and power management systems.

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