Synchronous step-down DC/DC converters support a low output voltage under 1.0V and feature an ultra-low supply current

Torex XC9272

Torex Semiconductor has launched the XC9272 series of synchronous step-down DC/DC converters. These converters support a low output voltage under 1.0 V and achieve an ultra-low supply current.

Torex - XC9272

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 1.0 V. This is likely to create an increase in demand for ultra-low supply current DC/DC converters that can support reduced core voltages.

Torex's newly launched XC9272 series of DC/DC converters supports a low output voltage from 0.60 to 0.95 V, and achieves an ultra-low supply current of 0.5 μA. This enables power to be supplied with high-efficiency to chipsets that require a core voltage under 1.0 V and maximizes the performance of low-voltage chipsets.

XC9272 - Typical application circuit
Typical application circuit. 

Optimization of the analog circuitry to realize a supply current of 0.5 μA 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 this power IC ideal 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.


XC9272 - Typical performance characteristics
Typical performance characteristics. 

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

Short-circuit protection and UVLO are provided as internal protective functions. CL discharge can be selected.

Select the SOT-25 package or the small USP-6EL (1.8 × 2.0 × h0.4 mm) package is optional to match the application.

XC9272 Series Features

  • Low output voltage support: 0.60 V to 0.95 V (accuracy ±20 mV)
  • Ultra-low supply current 0.5 μA
  • PFM control achieves high efficiency at light loads
  • Fast load transient response: 50 mV (VIN = 3.6 V, VOUT = 0.7 V, IOUT = 10 μA→50 mA)
  • SOT-25 package or small USP-6EL package (1.8 × 2.0 × h0.4 mm)
  • Protective functions: Short circuit protection, UVLO
  • CL discharge can be selected
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