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.