TPS62840YBGR

1 Features

• 60-nA operating quiescent current

• 100% duty-cycle mode with 150-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

• 20-nA shutdown current

• SON-8, WCSP-6 and HVSSOP-8 packages

2 Applications

• Smart meters, smart thermostats

• Tracking devices

• Wearable electronics

• Medical sensor patches and patient monitors

• Industrial IoT (smart sensors)

• Test and measurement

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 150 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 device’s STOP pin immediately eliminates any switching noise in order to take a noise-free measurement in data acquisition 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 a single coin cell, 2S to 4S Alkaline, 1S/2S Li-MnO2 or 1S LiIon.

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