L5963D-EHT

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PMIC - Voltage Regulators - Linear + Switching

The L5963D-EHT is a voltage regulator integrated circuit manufactured by ST Microelectronics that is designed to provide a variety of supply-voltage options for a wide range of applications. This device has a wide adjustable output range of 1.4 V to 19.5 V and can be used for both linear and switching type voltage regulation. As such, it is suitable for usage in many voltage-sensitive devices.

Application Field

The L5963D-EHT voltage regulator is ideal for circuits and applications that require a relatively large input-to-output voltage range. These include control and protection circuits, LED lighting, audio amplifiers, cable modems, storage systems, motor control circuits, robotics, the automotive industry, and numerous other applications.

Working Principle

The regulator works in two distinct modes: linear and switching. In the linear mode, the device’s output voltage is regulated by an external feedback resistor divider while the internal voltage regulator compares the output voltage with a precise reference voltage and then adjusts the output current according to the difference between the two. The output voltage can be finely adjusted via the external resistor divider.

When the device is in switching mode, the output voltage is adjusted via an external clock control unit and a smooth transition from linear to switching mode is enabled. The device also features an overcurrent protection circuit in which an external sense resistor is used to quickly identify any excessive current that may flow through the output pins. This in turn will cause the device to shut down temporarily, protecting the circuit from a potential short-circuit.

Operating Conditions

The device is designed to operate over a wide input voltage range of 1.4 V to 17 V and a temperature range of -40°C to +125°C. The maximum output current is 2 A and the peak current is up to 2.6 A. Peak switching frequency is 1.8 MHz.

Features and Benefits

The L5963D-EHT voltage regulator offers many advantages over other regulators. It has a wide adjustable output voltage range, it is capable of very high power output, it has a low quiescent current, it has a low output ripple, and it provides an excellent load regulation and line tolerance. As well, it is cost-effective and is extremely efficient, making it an ideal choice for many applications.

In summary, the L5963D-EHT voltage regulator from ST Microelectronics is a very efficient and cost-effective regulator that is capable of providing a variety of supply-voltage options for a wide range of applications. It features a wide adjustable output voltage range, high efficiency, low quiescent current, low output ripple, and excellent load regulation and line tolerance. This makes it an ideal choice for a variety of voltage-sensitive applications.

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