Texas Instruments' TPS62800 is a step-down converter with 2.3 µA typical quiescent current that features high efficiency and small solution size. TI’s DCS-Control™ topology enables the device to operate with tiny inductors and capacitors with a switching frequency up to 4 MHz. It seamlessly enters power save mode to reduce switching cycles and maintains high efficiency at light-load conditions.

A fixed output voltage is selected by connecting the VSEL/MODE pin to GND. Sixteen internally set output voltages can be selected with one external resistor connected to the VSEL/MODE-pin. An integrated resistor-to-digital (R2D) converter reads out the external resistor and sets the output voltage. The same device part number is used for different applications and voltage rails by changing a single resistor.

The internally set output voltage provides better accuracy compared to a traditional external resistor divider network. Once the device is started up, the DC/DC converter enters forced PWM-mode by applying a high-level at the VSEL/MODE-pin. In this operating mode, the device runs at a typical 4 MHz or 1.5 MHz switching frequency, enabling low output voltage ripple and high-efficiency. The TPS62800 device comes in a tiny 6-pin WCSP package with 0.35 mm pitch.

TPS62800 WEBENCH® interactive preview