TPS65251-2RHAR

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Depletion-mode MOSFETs, also known as active-low, are transistors that utilise two types of operation to switch power: on-state conduction and off-state blocking. As such, a depletion-mode MOSFET can be used in many applications as a switch, such as in various DC-DC converter circuits. The TPS65251-2RHAR is a low-power, microarchitecture-driven, DC-DC synchronous step-down voltage converter composed of a depletion-mode MOSFET for on-state conduction and a laterally-diffused p-channel MOSFET (LDMOS) for off-state blocking.

This device is capable of providing a minimum regulated output voltage as low as 0.7 V at a buck-mode switching frequency of up to 1.2 MHz. This buck-mode switching frequency is enabled through the selectable phase-shifts that are typically provided through phase-shift control (PSC) circuitry. This utility minimizes switching losses and after the regulation loop settles, the switching frequency is automatically adjusted to ensure a continuous true regulated output. The output voltage is adjustable with two external resistors.

The internal components and power levels of this device work together to improve transient line and load operations for optimum operation. Implemented with the small packaging configuration, the TPS65251-2RHAR is a high-integration device that includes a synchronous dual-phase pumped converter, mixed-voltage regulation, a non-synchronous converter, Adaptive Body Bias functionality, drain-loads and a comprehensive protection scheme.

Additionally, an active discharge feature provides precision current delivery while a selectable peak load current enables the device to detect and control a high transient load current. The device also provides a soft-start operation and an internal clock which provides a selectable frequency of up to 1.2 MHz.

The TPS65251-2RHAR is designed for applications including cellular handsets, portable data acquisition systems, portable consumer devices, and other battery-powered products. The features of this device ensure low power consumption while extending battery life. This device also has built-in protection features to guard against over-current, over-temperature and excessive power dissipation.

Overall, the TPS65251-2RHAR is an effective solution for DC-DC voltage regulating applications. Operating at a low voltage level and with a switching frequency of up to 1.2 MHz, this device is capable of meeting the needs of a variety of low power applications. Not to mention, the internal components are designed for optimal current delivery, making it an efficient and cost-effective solution for DC-DC switching.

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