1 Features

? 1.8-V to 5.5-V input voltage range

? 0.4-V to 3.6-V output voltage range

? 275-nA typical quiescent current

? 600-mA output current

? 1 output voltage accuracy

? 4-nA typical shutdown current

? Output discharge

? VSET pin-selectable output voltage through a

single resistor

– TPS628436: 0.4 V to 0.8 V

– TPS628437: 0.8 V to 1.8 V

– TPS628438: 1.8 V to 3.6 V

? Optimized for small passive components

– 1-μH inductor

– Down to 4.7-μF COUT

? 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, 0.35-mm pitch WCSP package with

0.84mm2 size

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

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 275 nA. The device features a 4-

nA 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 1.5 MHz and extends a high efficiency

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

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.