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POL regulators deliver 15A output current

19 Jul 2013

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Fairchild Semiconductor recently developed its next generation TinyBuck regulator family. The company's latest integrated POL regulators incorporate a constant on-time PWM controller and driver with high-side and low-side MOSFETs.

The FAN23xx family enables end-user applications to achieve significantly higher efficiency over a very wide load range. This is achieved through multiple optimisations including a fine-tuned gate drive circuitry with optimised gate drive current and dead times for each specific part number giving two per cent higher peak efficiency compared to competitive solutions. The regulators also feature constant on-time architecture with pulse frequency modulation (PFM) for highest light load efficiencies.

The TinyBuck regulators have the capability of running up to a 1.5MHz switching frequency, enabling customers to achieve high efficiency while reducing the number of inductor and capacitor (LC) components needed. Devices in the family can achieve the same efficiency as equivalent discrete solutions running at half the switching frequency.

The FAN2306, for example, can deliver 92.5 per cent efficiency at full load, 12V input, 1.2V output 500kHz switching frequency while using a 1.2µH inductor. The same device can be used at the same duty cycle, 1Mhz, and achieve 90 per cent efficiency using 0.56µH inductor. A single footprint for the 6A, 10A and 15A devices provides flexibility, allowing designers to scale the current level of their system without changing their board layout.

Additionally, the next generation TinyBuck regulator family is supported by an online design tool providing designers a simple, easy-to-use tool that enhances their design and improves time to market.

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