L5963DN-EHX

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Part Status:	Active

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L5963DN-EHX application field and working principleThe L5963DN-EHX is a dual-output power management integrated circuit (PMIC) from STMicroelectronics, which targets low-voltage systems. It combines linear and switching regulators to offer efficient power management for applications with low output-voltage requirements, making it suitable for use in smartphones and other portable devices.The L5963DN-EHX is based on a mono-CMOS process, which offers high levels of integration and low consumption. This makes it suitable for mobile, battery-operated systems. The integrated circuits feature dual linear and a single switching regulator, making them ideal for powering both analog and digital circuitry in devices that require high power supplies.The L5963DN-EHX has a wide variety of features and advantages, making it suitable for a variety of applications, including:Smartphones and other handheld devicesTabletsDigital cameras and camcordersBattery-operated equipmentGPSWearable electronicsThe L5963DN-EHX offers a variety of features and benefits, including high accuracy and low-noise voltage regulation, low power consumption, and an integrated Power On Reset (POR) circuit. It also features integrated over-current and thermally cycling protection circuits. The circuit offers nine output voltage options, ranging from 1.2V to 4.5V, and can be configured to provide a step-up, step-down, or conventional linear regulator. It can also simultaneously support a step-up and step-down configuration, allowing higher output voltages than the 3.3V maximum of the linear regulator stage.The L5963DN-EHX operates by adjusting the current through an internal switch, allowing it to operate as an inverter, a step-down or step-up regulator, or a linear regulator. The operating principle for a linear regulator involves a comparison of the reference voltage, which is set by a resistor divider connected from the reference pin to ground, and the output voltage, which is set by the output voltage feedback pin. Depending on the ratio chosen for the resistors, the output voltage can be higher or lower than the reference voltage.The switching regulator operates on the same principle, but with the addition of a switch and an inductor. The switch is connected between the input voltage and the reference pin and is opened and closed to convert the voltage between them. During one cycle, the switch is opened. This causes the energy stored in the inductor to flow out of the reference pin to the output voltage pin, generating an additional voltage that is added to the reference voltage. During the other cycle, the switch is closed, causing the current to flow through the inductor back to the reference pin and allowing the output voltage to remain stable.The combination of the linear and switching regulator stages allows the L5963DN-EHX to offer high efficiency voltage regulation, even with a wide range of input voltages. With the current waveform generated by the switch, the linear regulator stage can also be used to improve the accuracy of the system.The L5963DN-EHX has a wide range of features and benefits, making it a suitable choice for powering low-voltage systems. It combines linear and switching regulators to offer efficient voltage regulation, even in situations with wide range of input voltages and energizes both analog and digital circuitry.

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