LT3481HDD#TRPBF

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PMIC - Voltage Regulators - DC DC Switching Regulators

The LT3481HDD is a dual-channel, 1A DC/DC synchronous, step-down switching regulator constant frequency current mode controller. It includes two outputs, each driving an enhancement-mode N-channel MOSFET at up to 1A. It features an internal compensation network and internal soft-start. The input voltage range is from 2.7V to 32V and the output is adjustable from 0.8V to 28V. The operating frequency can be programmed up to 1,000kHz.

There are several advantages that the LT3481HDD can offer, such as having programmable output voltages, allowing the user to customize their design to their exact specifications. It also has low power consumption design, allowing the user to use a single-cell battery and still produces high-quality output voltage. Additionally, its internal compensation network allows for compensation with just one external resistor. The LT3481HDD also features dual-channel output, which enables the user to build systems with either two independent outputs or a parallel output, saving board space and costs.

The LT3481HDD has many application fields. It is used for high power LED lighting, LCD TVs, computer monitors, external HDD and CD/DVD drives, game consoles, and battery-powered portable products. It can also be used in automotive and industrial applications such as energy harvesting, uninterruptible power supply (UPS), zero-voltage switching (ZVS) power supply, and voltage rate of change (dV/dt) limiting.

The LT3481HDD operates on a constant frequency current mode control principle. This mode of control is suitable for applications requiring fast transient response and excellent light load stability. It regulates the output voltage using a low-side N-channel MOSFET as the switching element. It regulates the PWM signal with an internal voltage reference, oscillator, and error amplifier. The error amplifier compares the output voltage with its internal reference and adjusts the switching frequency and duty cycle of the external power MOSFET in order to reach the desired output voltage.

In summary, the LT3481HDD is a dual-channel, 1A DC/DC synchronous, step-down switching regulator constant frequency current mode controller. It offers a wide operating range from 2.7V to 32V and adjustable output from 0.8V to 28V. It has a high power-efficiency design and features internal compensation network, dual-channel output, and internal soft-start. The LT3481HDD has many application fields, including high power LED lighting, LCD TVs, monitors, external HDD and CD/DVD drives, game consoles, and battery-powered portable products, as well as automotive and industrial applications. It operates based on a constant frequency current mode control principle, which is suitable for applications requiring fast transient response and excellent light load stability.

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