High-efficiency step-down converter extends battery life
The TPS62840 from Texas Instruments is a high efficiency step-down converter with ultra-low operating quiescent current of typically 60nA. The device contains special circuitry to achieve just 150nA 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 1.8MHz. In Power-Save Mode the device extends the light load efficiency down to a load current range of 1µA and below.
A total of 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 750mA. With an input voltage of 1.8 to 6.5V, the device supports multiple power sources such as 2S to 4S Alkaline, 1S to 2S Li-MnO2 or 1S Li-Ion/Li-SoCl2.
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