LM27342MY/NOPB

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The LM27342MY/NOPB from Texas Instruments is a synchronous, DC-DC switch mode voltage regulator with an integrated single-stage full-bridge circuit. This device is capable of supplying output current up to about 600mA and can provide a regulated output voltage from 1.8V to 5.5V. The device accepts an input voltage up to 24V, and features a pulse-width-modulated (PWM) control scheme.

This device is part of the Power Management Integrated Circuit (PMIC) family of voltage regulators. PMICs provide regulated voltages for efficient operation and power management of complex systems. Voltage regulators are defined according to the type of conversion they perform and the sources of input and output current they accept. PMICs with DC-DC switching regulators provide the most efficient way to convert one DC voltage to another.

The LM27342MY/NOPB is a DC-DC switching regulator with an integrated full-bridge drive circuit. The switching frequency of the device can be configured up to 1.2MHz and the peak current can be adjusted up to 600mA. The device features an internal synchronization scheme, allowing for synchronization to another switching regulator or an external clock source for multiple regulators in parallel.

The device features integrated temperature compensation, which allows it to accurately regulate the output voltage over a wide temperature range. Additionally, the device features adjustable over- voltage protection, current limiting, and short circuit protection.

In order to achieve a regulated output voltage, the LM27342MY/NOPB uses a PWM control scheme. When enabled, the integrated full-bridge drive circuit switches the power MOSFETs of the internal power switching stage, thus converting the DC input voltage to a regulated DC output voltage. The on-time of each switching cycle is determined by the voltage feedback and the internal voltage reference, while the off-time is determined by the current feedback and the internal current limit. This results in oscillations of the output voltage at the switching frequency of the device.

The LM27342MY/NOPB can be used in a variety of applications, such as powering processor cores, memory or voltage rails, or for supplying low-noise power to ADCs. Additionally, the device can be employed as a driver of PCMs and other gate drivers in motor control applications. Finally, the device can help as a power supply for digital video, audio and other low-voltage applications.

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