# TPS62840 buck converter: 1.8 to 6.5 V in, 750 mA, 60 nA quiescent

> An ultra-low-power step-down converter for battery sensors and radios: input range, current, quiescent current, selectable outputs and packages.

Canonical: https://roboticsengineering.in/components/tps62840-nanopower-buck-converter/ | Published: 2026-11-03 | Updated: 2026-11-03

**The TPS62840 is a step-down converter that uses just 60 nA of quiescent current and delivers up to 750 mA from an input of 1.8 V to 6.5 V.** It is built for devices that sleep for most of their life and then power a radio, such as a battery sensor node. At light load it still reaches 80 percent efficiency at 1 µA of output current from 3.6 V to 1.8 V. Figures are from the Texas Instruments TPS62840 datasheet SLVSEC6D.

## Key specifications

| Input | 1.8–6.5 V |
| --- | --- |
| Output current | up to 750 mA |
| IQ | 60 nA (120 nA at 100% duty) |
| Shutdown | 25 nA |
| Output | 16 settings via VSET |
| Frequency | 1.8 MHz typical |
| Packages | SON-8, WCSP-6, HVSSOP-8 |

## What the datasheet promises

| Item | Datasheet value |
| --- | --- |
| Input voltage | 1.8 V to 6.5 V |
| Output current | Up to 750 mA |
| Quiescent current | 60 nA operating; 120 nA in 100 percent duty-cycle mode |
| Shutdown current | 25 nA |
| Light-load efficiency | 80 percent at 1 µA output current (3.6 V in, 1.8 V out) |
| Output voltage | 16 selectable outputs through a resistor on the VSET pin |
| Control | DCS-Control with automatic PFM/PWM transition; selectable forced-PWM and STOP modes |
| Switching frequency | 1.8 MHz typical |
| Other features | Output discharge function |
| Sources | Suits 2S to 4S alkaline, 1S to 2S Li-MnO2, or 1S Li-ion and Li-SOCl2 cells |
| Packages | SON-8 (DLC), 1.5 × 2 mm; WCSP-6 (YBG), 0.97 × 1.47 mm; HVSSOP-8 (DGR), 3 × 5 mm |

The STOP pin stops switching immediately, which removes switching noise for a quiet sensor measurement. The converter saves most energy in sleep, so it matters most for a node that wakes briefly; for a motor robot a bigger converter such as the [TPS62130](https://roboticsengineering.in/components/tps62130-buck-converter/) is the better fit.

## Using it on a robot

- Power a 3.3 V or 1.8 V microcontroller and radio from a coin-cell-class or Li-ion source.
- Use the STOP pin to silence switching during an analog measurement.
- Choose the output voltage with the VSET resistor, as set out in the datasheet table.
- For a lower-current linear option see the [TPS7A02](https://roboticsengineering.in/components/tps7a02-nanopower-ldo/).

## Sources and further reading

- [Texas Instruments TPS62840 datasheet (SLVSEC6D)](https://www.ti.com/lit/ds/symlink/tps62840.pdf) — input range, current, quiescent and shutdown current, efficiency, output selection and packages above.

Last reviewed: November 2026. Limits are from the Texas Instruments datasheet; breakout boards and modules vary. No price is quoted because it has not been checked.