The TPS6273x family provides a highly integrated ultra low power buck converter solution
that is well suited for meeting the special needs of ultra-low power applications such as energy
harvesting. The TPS6273x provides the system with an externally programmable regulated supply to
preserve the overall efficiency of the power-management stage compared to a linear step-down
converter. This regulator is intended to step-down the voltage from an energy storage element such
as a battery or super capacitor to supply the rail to low-voltage electronics. The regulated output
has been optimized to provide high efficiency across low-output currents (<10 µA) to high
currents (200 mA).
The TPS6273x integrates an optimized hysteretic controller for low-power applications.
The internal circuitry uses a time-based sampling system to reduce the average quiescent
To further assist users in the strict management of their energy budgets, the TPS6273x
toggles the input power-good indicator to signal an attached microprocessor when the voltage on the
input supply has dropped below a preset critical level. This signal is intended to trigger the
reduction of load currents to prevent the system from entering an undervoltage condition. In
addition, independent enable signals allow the system to control whether the converter is
regulating the output, monitoring only the input voltage, or to shut down in an ultra-low quiescent
The input power-good threshold and output regulator levels are programmed independently
through external resistors.
All the capabilities of TPS6273x are packed into a small footprint 14-lead 3.5-mm ×
3.5-mm QFN package (RGY).
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