TPS62849DLCR

1 Features

· 60-nA operating quiescent current

· 100% duty-cycle mode with 120-nA lo

· Input voltage range V/N from 1.8Vto 6.5V

· Output current up to 750 mA

· RF friendly DCS-ControlM

· 80% efficiency at 1 uA lour(3.6 Vw to 1.8 Vour)

· 16selectable 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-6and thermally enhanced HVSSOP-8packages

2 Applications

· Smart meters, smart thermostats

· Asset tracking devices

· Wearable electronics

· Medical sensor patches and patient monitors

· Industrial loT(smart sensors)/NB-loT

· 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 lo 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-HA 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 test & measurement systems.

The TPS6284x 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-MnO, or 1S Li-lon/Li-SOCl2.

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