LV5808MX-TLM-H

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LV5808MX-TLM-H is a DC-DC buck（Step-Down）switching regulator, which is an integrated circuit used to reduce the input voltage to the desired output voltage. The device integrates high-efficiency MOSFET, Soft-Start, Frequency Control, Output Disconnect, and over-current protection, enabling flexible power supply design. The LV5808MX-TLM-H is suitable for portable applications, including mobile phones and tablets,due its low quiescent current of 30uA, low output ripple noise and decent transient response.

Application Field

The LV5808MX-TLM-H is a compact and cost-effective device, which has a wide application range. It is commonly used in mobile phone and tablet chargers, therefore it can meet the low power and highly efficient requirements. Its wide input voltage range makes it well suited various power sources, including batteries and AC adapters. Its adjustable output current range makes it an ideal solution for a wide range of applications. It can be used in power supplies, notebooks, PDAs, digital cameras, navigation systems, and mobile communication equipment. With its short circuit protection, over-current protection and other protection functions, it can effectively protect the power system. In addition, the LV5808MX-TLM-H can be used to control LED illumination, thus it is a suitable solution for LED drivers.

Working Principle

The LV5808MX-TLM-H is an integrated DC-DC switching converter. It significantly reduces the output voltage through buck topology, and then the output power is increased by a DC-DC switching converter so that it amplifies the output voltage. The buck converter makes use of the inductance in the circuit and switches it on and off to reduce the output voltage. When the switch is closed, the inductor stores the input current, and when the switch is opened, the inductor releases the stored energy to the output voltage. The LV5808MX-TLM-H has a voltage feedback loop, which can control the output voltage. The output voltage is kept at a certain value by comparing the feedback voltage with the reference voltage. With the output current sensing and comparator circuit, the output current is limited, so it can effectively protect the circuit during overload.

The LV5808MX-TLM-H also has a constant frequency current mode control, which can reduce EMI interference and make the output waveform more stable. The LV5808MX-TLM-H also features soft-start, which fills the output capacitor slowly during startup, thus reducing the inrush current, effectively protecting the power supply and reducing the power consumption. In addition, the LV5808MX-TLM-H also has an over-current protection function, which protects the power supply from overcharging or overdischarging.

The LV5808MX-TLM-H is designed to be an ideal DC-DC switching regulator for a wide range of applications. It is low cost, highly efficient and with low operating temperature. It has a wide operating input voltage, adjustable output current and output voltage and can provide reasonable protection for the circuit. With its short circuit protection, over-current protection and other protection functions, it can effectively protect the power system and provide a stable power supply for a variety of applications.

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