LT3492IFE

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The LT3492IFE is a high-precision, very-low-dropout (VLDO) ideal diode-OR/ideal FLOR linear regulator, comprising an n-channel power MOSFET and a controlling integrated circuit (IC). This system operates in a closed-loop configuration, providing stable output voltage and very low output power losses. The LT3492IFE is suited for a variety of electronic applications requiring accurate output regulation, including PMIC (power management integrated circuit) and LED driver applications.

The LT3492IFE features wide 2% output voltage accuracy over all operating temperatures, low dropout voltage of 70mV, low quiescent current of 10 μA, fast response time of 500ns and wide input voltage range of 1.8V to 5.5V. Its advanced topology is ideal for steady and constant current supply, as well as energy harvesting applications. The internal current limit and thermal protection allow it to operate safely in environments with a wide temperature range, making it a suitable fit for both automated and manual systems. Finally, the chip is offered in a tiny 10-pin MSOP package, allowing it to save significant board space in any system.

The LT3492IFE works by comparing the voltage on the feedback pin to a reference voltage of 1.2V. When the feedback pin is above 1.2V, the device will turn on the internal PMOS (power MOSFET) until the voltage is equalized. The device uses the PMOS to create a near-ideal diode, meaning the output voltage remains constant and ripple-free, even when the voltage on the input varies or is outside the specified input range. The LT3492IFE is further optimized for current-mode applications and takes advantage of an error ampere-step-down topology to create a regulated and precise current output.

When used in PMIC applications, the LT3492IFE can offer multiple advantages such as very-low power consumption, wide level control range, and a very small size. It can be used to control the output of an adjustable DC voltage source, which is ideal for powering small electronics modules, and for providing accurate output current for LED drivers and energy harvesting systems.

The LT3492IFE is a valuable tool for PMIC engineers, especially when precision and accuracy are paramount. Its fast response time, precise regulation and wide input voltage range, low noise operation and efficient power consumption all make it a great fit for LED drivers and power management ICs. With its wide range of features and capabilities, the LT3492IFE is a powerful addition to any engineer’s toolset.

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