Step-down DC/DC converters realise 0.5μA supply current

13th June 2016

Nat Bowers

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Datasheet

Torex Semiconductor has launched a series of synchronous step-down DC/DC converters supporting a low output voltage from 0.60 to 0.95V and achieving an ultra-low supply current of 0.5μA. The XC9272 series enables power to be supplied with high-efficiency to chipsets that require a core voltage under 1.0V and maximises the performance of low-voltage chipsets.

The demand for low power consumption is growing stronger and the development of chipsets with reduced core voltages is advancing. As core voltages of GPS, Bluetooth and other functions decrease, the market is expected to experience a further increase of demand for chipsets that require a core voltage of less than 1.0V. This is likely to create an increase in demand for ultra-low supply current DC/DC converters that can support reduced core voltages.

Optimisation of the analog circuitry to realise a supply current of 0.5μA and the use of PFM control for the operation method enable this product to achieve a significant increase of efficiency at light loads compared to conventional products. This makes it possible to dramatically improve power dissipation when the chipset is in the sleep state.

These characteristics make the power IC suited for applications that require a long battery drive time, such as devices with a GPS function, wearable devices, energy harvesting devices and other devices in which efficiency in the sleep state is important.

The supported output voltage is 0.60 to 0.95V, the input voltage range is 2.0 to 6.0V and the supply current is held to 0.1μA or less in standby mode.

Short-circuit protection and UVLO are provided as internal protective functions. CL discharge can be selected. SOT-25 or small USP-6EL (1.8x2.0x0.4mm) packages are available.