Taking Power Conversion to the Next Level

­The PE24111 expands pSemi’s portfolio of two-stage buck regulators that target applications requiring high efficiency in a low-profile form-factor (<1.2mm) applications. The device consists of a two-phase interleaved charge pump followed by an interleaved buck regulator stage. This power system greatly reduces the dependency on inductance for high efficiency solutions in small-footprint and height-constrained form-factors. The output voltage is selected with external feedback resistors or by an external DAC and can be adjusted between 0.35 and 0.85V. This makes the PE24111 ideal for step-down DC-DC converter solutions for low-profile point-of-load (POL) regulators, high-density, optical transceiver modules, core supplies, ASICs, and FGPAs. To achieve higher power delivery, the PE24111 can be connected in parallel--up to four devices--with synchronization capability. 

The PE25213: Providing Peak Efficiency of 99% Conversion Intermediate Step-Down Applications

The PE25213 is an ultra-high efficiency charge pump that is configurable to divide down an input voltage by two or three and delivers up to 10A with peak efficiency up to 99%. The device uses pSemi’s patented adiabatic or lossless switching architecture to maximize efficiency and reduce solution size. 

The PE25213 supports an input voltage range of 5.7V to 15V in divide-by-2 mode and 8.4V to 15V in divide-by-3 mode. It is primarily used as a front-end converter to convert a two- or three-cell battery input to a 1-1.5S output for downstream regulator to improve overall system efficiency and extend run time. The PE25213 also offers a unique auto-switch mode to change the divide-down ratio during operation to avoid a downstream under-voltage lockout (UVLO) event at heavy system loading during low battery condition. 

The PE25213 comes in a 4.545 mm × 2.715 mm 47-pin WLCSP package. The pinout is specially designed to be fully compatible with Type III PCB design to reduce system cost. It targets 2 and 3S battery input systems such as laptop and 12V input systems such as datacenter and networking applications.

"We are proud to bring our latest power conversion technologies, including the world’s first 4-level buck converter for battery charging applications and the PE24111 and PE25213, to market and continue to raise the bar for what is possible in the industry," says Steve Allen, vice president of power, pSemi. 

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