1 Features

? 1.8V to 5.5V input voltage range

? 0.4V to 3.6V output voltage range

? 275nA typical quiescent current

? 600mA output current

? 1% output voltage accuracy

? 4nA typical shutdown current

? Output discharge

? VSET pin-selectable output voltage through a

single resistor

– TPS628436: 0.4V to 0.8V

– TPS628437: 0.8V to 1.8V

– TPS628438: 1.8V to 3.6V

? Designed for small passive components

– 1μH inductor

– Down to effective capacitance of 4μF COUT

? High PSRR (up to 83dB)

? Low output voltage ripple in power save mode

? RF-friendly and fast transient DCS-Control

? Automatic transition to no ripple 100% mode

? 0603-inductor and 0402-capacitor size supported

? Tiny 6-pin, 0.35mm pitch WCSP package with

0.84mm2 size

? Pin-to-pin compatible to the TPS6280x family (1A)

in WCSP package

? Available in a 1.60mm × 1.60mm SOT563

package

2 Applications

? Wearable electronics

? Headsets, headphones, and earbuds

? Mobile phones

? Medical sensor patches

? Hearing aid

3 Description

The TPS62843 is a high-efficiency, step-down

converter family with ultra-low operating quiescent

current of typically 275nA. The device features a 4nA

shutdown (typical) current when disabled.

The device uses DCS-Control with a low and RFfriendly

output voltage ripple to power radios.

The device operates with a typical switching

frequency of 1.5MHz and extends a high efficiency at

light-load down to 100μA load current and below.

3 × 18 pre-defined output voltages can be selected

by connecting a resistor to the VSET pin, making

the family usable across various applications with a

minimum set of passive components.