TPS61258YFFT

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TPS61258YFFT is a cost-effective, integrated DC-DC step-up switching regulator that provides an output up to 4.5V with 2.5V to 6V of supply voltage. Designed with low external component count, the TPS61258YFFT provides 2A output current and up to 88% peak efficiency. It also includes flip-chip integrated power switches and a fixed 3.3V linear regulator output.

The TPS61258YFFT is an ideal solution for applications such as tablets, handsets, POS systems, notebooks, digital cameras, game controllers, wearables and other portable applications. It features a wide input voltage range, up to 6V, and its fast transient response enables the use of small output capacitors, reducing overall size and cost. The TPS61258YYFFT reduces no load current to 30uA and the output has built-in ± 0.7% voltage accuracy.

The TPS61258YFFT is a synchronous buck-boost regulator that provides step-up, step-down and boost-only operation, meaning that it can regulate different output voltages generated from any input voltage. It uses both an N-channel MOSFET and a P-channel MOSFET asswitch and the two MOSFETs can form different topologies. During start-up, the TPS61258YFFT begins by connecting the N- and P-channel MOSFETs in series. When the input voltage rises above the regulating voltage, the P-channel MOSFET is turned off and the N-channel MOSFET is used as the switch.

The TPS61258YFFT uses a constant on-time control scheme which makes it simpler to implement than traditional voltage regulation circuits. The device uses an internal timer to control the duty cycle of the MOSFET switch. This timer under-samples the output voltage and adjusts the duty cycle to achieve the desired output voltage.

The TPS61258YFFT also includes a Power Path Selector (PPS) option that allows the user to select between two different power paths. The PPS path can be used to keep the TPS61258YFFT in a lower power consumption state even in low voltage and high current applications such as battery powered portable applications.

In summary, the TPS61258YFFT is a cost-effective, highly efficient DC-DC step-up switching regulator with a wide input voltage range, up to 6V and up to 88% peak efficiency. It also offers flip-chip integrated power switches, a fixed 3.3V linear regulator output, fast transient response and low output current ripple. The TPS61258YFFT also features an integrated Power Path Selector and a constant on-time control enabling the design of small, cost-effective and robust power supplies.

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