TPS61261DRVR

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TPS61261DRVR is a compact DC-DC step-down regulator with an adjustable output voltage range of 0.8V to 5.5V and an adjustable current range of 2V to 6V. It is one of the few switching regulators that provide a high efficiency up to 94% at 1V output and up to 95% at 3V output. This device is especially suitable for handheld applications such applications that require a low-noise supply, low ripple, and low temperature rise. It has built-in MOSFETs with low RDS(ON) values, allowing for high efficiency with minimal power dissipation.

As a programmable DC-DC converter, the TPS61261DRVR can be used in many applications, including consumer electronics, PCs, and telecommunication systems. It is particularly suited for low voltage, low-noise, low-power combinational logic circuits. An adjustable output soft-start feature allows for smoother startup when a system has a high inrush current requirement. The TPS61261DRVR is optimized for low-cost, low-power applications where an extended output voltage range is desired.

In terms of its working principles, the TPS61261DRVR is a synchronous buck converter, meaning it switches the output voltage in synchronous with the input voltage. This switching action affects the output voltage by cycling the power to the output capacitor bank at a desired rate. The TPS61261DRVR incorporates a high frequency switching transistor that allows a high switching frequency up to 6.5MHz, allowing for a more efficient operation. The Output voltage is monitored by the integrated voltage loop, which programs the gate driver of the power switch. The power MOSFET is driven by a low-side gate driver. This topology allows additional current to be supplied to the output during fast-transitions, which is an important feature of a high-performance buck converter.

The TPS61261DRVR integrates an adjustable operating frequency, allowing users to optimize the design for a specific output voltage and load. This feature permits a smooth transition from the lower current levels to maximum rated output current. It also allows for a resonant switching cycle at higher frequencies that can reduce input pulses as well as the ripple current at the input of the TPS61261DRVR. This reduces the size of the input capacitors, saving valuable board area.

The TPS61261DRVR is suitable for combination with a number of converters, such as synchronous buck converters, step-down converters, and flyback converters. In addition, the TPS61261DRVR incorporates a wide array of additional features that make it well suited for use in many applications. These features include an adjustable switching frequency, two power-saving modes, a low shutdown current, reverse current detection and protection, over temperature protection, and under voltage lockout.

To summarize, the TPS61261DRVR is a compact DC-DC step-down regulator that is ideal for handheld applications and those requiring a low-noise supply, low ripple, and low temperature rise. It offers an adjustable output voltage range of 0.8V to 5.5V, adjustable current range of 2V to 6V and adjustable operating frequency, making it suitable for combination with many other converters and ideal for use in both low-cost, low-power applications and high-performance buck applications.

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