Step-down converter features high efficiency and small solution size

The Texas Instruments TPS6280x device family is a step-down converter with 2.3µA typical quiescent current featuring highest efficiency and smallest solution size. The company's DCS-Control topology allows the device to run with tiny inductors and capacitors up to a 4MHz switching frequency. At light load conditions, it seamlessly enters Power Save Mode to decrease switching cycles and to maintain high efficiency. Connecting the VSEL/MODE pin to GND selects a 1.2V fixed output voltage. With only one external resistor joined to VSEL/MODE pin, 16 internally set output voltages can be chosen. An integrated R2D converter reads out the external resistor and sets the output voltage. The same device part number can be used for various applications and voltage rails by substituting a single resistor. Also, the internally set output voltage gives better accuracy in comparison to a traditional external resistor divider network. Once the device has started up, the DC-DC converter enters Forced PWM Mode by applying a high level at the VSEL/MODE pin. In this mode, the device runs at typically 4MHz switch frequency offering lowest output voltage ripple. The device series comes in a tiny six-pin WCSP package with 0.35-mm pitch.