L4949ED013TR Integrated Circuits (ICs)

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Linear Voltage Regulators

Linear voltage regulators are an important class of power supply management integrated circuit (PMIC) used to control the output voltage of power designs. The L4949ED013TR is a particularly notable device, thanks to its use in a wide range of applications and its high-performance operation. In this article, we explore the L4949ED013TR’s application field and working principle.

Applications

The L4949ED013TR is a versatile voltage regulator, offering two operational features. Firstly, it is able to function as both a low drop-out (LDO) and switch-mode regulator, providing both the stability of the former and the energy efficiency of the latter. Secondly, it offers peak current mode control, ensuring that the output voltage is regulated in both continuous and peak operating conditions.

The L4949ED013TR is particularly suitable for battery-powered devices, where its peak current mode control ensures that the output voltage remains constant regardless of changes in the load or chemical conditions in the battery. It also finds use in portable consumer devices, wearables, and internet of things (IoT) systems; thanks to its broad input and output voltage ranges, low noise operation, and low stand-by current. The regulator is available in a 4mm x 4mm QuantumWise™ package, making it ideal for use in space-constrained designs.

Work Principle

The internal architecture of the L4949ED013TR is a combination linear voltage regulator and current mode pulse-width modulation (PWM) controller. It combines the best features of both to provide an efficient, low noise solution. When operating in the linear mode, current consumption is minimal; in the PWM mode, voltage output is switched rapidly to regulate the current flowing through the load.

The L4949ED013TR uses the peak current mode control principle to achieve regulation in the PWM mode. This approach is superior to traditional voltage regulation methods because it can provide better output voltage accuracy, response time, and stability with minimal current consumption. The internal circuitry of the L4949ED013TR monitors the output current and automatically adjusts the pulse-width modulation duty cycle as necessary to maintain a constant output voltage.

Conclusion

The L4949ED013TR is an advanced linear voltage regulator, offering peak current mode control, LDO and switch-mode operation, low noise operation, and low stand-by current. Thanks to its robust feature set, the regulator is suitable for a wide range of applications, including consumer electronics, wearables, battery-powered devices, and IoT systems. The regulator’s peak current mode control enables efficient output voltage regulation in both continuous and peak operating conditions.

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