1 Features

1• 60-nA operating quiescent current

• 100% duty-cycle mode with 120-nA IQ

• Input voltage range VIN from 1.8 V to 6.5 V

• Output current up to 750 mA

• RF friendly DCS-Control™

• 80% efficiency at 1 μA IOUT (3.6 VIN to 1.8 VOUT)

• 16 selectable output voltages via VSET pin

• Auto transition PFM/PWM or forced-PWM mode

• Selectable forced PWM and STOP modes

• Output discharge function

• 25-nA shutdown current

• SON-8, WCSP-6 and thermally enhanced

HVSSOP-8 packages

2 Applications

• Smart meters, smart thermostats

• Asset tracking devices

• Wearable electronics

• Medical sensor patches and patient monitors

• Industrial IoT (smart sensors) / NB-IoT

• Test and measurement

• ATEX / intrinsic safety

3 Description

The TPS62840 is a high-efficiency step-down

converter with ultra-low operating quiescent current of

typically 60 nA. The device contains special circuitry

to achieve just 120 nA IQ in 100% mode to further

extend battery life near the end of discharge.

The device uses DCS-Control to cleanly power radios

and operates with a typical switching frequency of 1.8

MHz. In Power-Save Mode, the device extends the

light load efficiency down to a load current range of 1

μA and below.

16 predefined output voltages can be selected by

connecting a resistor to pin VSET, making the device

flexible for various applications with a minimum

amount of external components.

The STOP pin of the device immediately eliminates

any switching noise in order to take a noise-free

measurement in test and measurement systems.

The TPS62840 provides an output current of up to

750 mA. With an input voltage of 1.8 V to 6.5 V, the

device supports multiple power sources such as 2S

to 4S Alkaline, 1S to 2S Li-MnO2, or 1S Li-Ion/Li-

SOCl2.