By Texas Instruments 31
Texas Instruments' TPS62807 step-down converter offers 2.3 µA typical quiescent current, ultra-high efficiency, and an ultra-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. At light-load conditions, it seamlessly enters power save mode to reduce switching cycles and maintain high efficiency.
Connecting the VSEL/MODE pin to GND selects a fixed output voltage. With only one external resistor connected to VSEL/MODE pin, sixteen internally set output voltages can be selected. An integrated R2D (resistor-to-digital) converter reads out the external resistor and sets the output voltage. The same device part number can be used for different applications and voltage rails just by changing a single resistor. The internally set output voltage provides better accuracy compared 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 operating mode, the device runs at a typical 4 MHz or 1.5 MHz switching frequency enabling ultra-low output voltage ripple and ultra-high efficiency. The TPS62807 converter comes in a tiny 6-pin WCSP package with 0.35 mm pitch.