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.