A high-efficiency, ultra-low power step-down converter is available for energy harvesting and low-power applications. According to its manufacturer, Texas Instruments Incorporated, the TPS62120 achieves 96% efficiency, and can generate a 75-mA output current from an input voltage of 2 to 15 V. The device supports energy harvesting and battery-powered applications, as well as 9-V and 12-V line-powered systems.
The converter features a power-save mode to add efficiency to the entire load current range, reaching 75% efficiency at loads down to 100 uA. During light load operation, the device operates in a pulse frequency modulation mode, consuming only 11 uA of quiescent current. The converter also maintains smooth, efficient operation at higher currents by transitioning automatically from its power save mode to a fixed-frequency pulse width modulation mode.
Other features include:
- Smooth start-up from weak energy sources: wide under voltage lock out (UVLO) hysteresis; operating range from 2.5 V rising to 1.85 V falling.
- Low power: 75 mA output and power save mode with 11-uA quiescent current.
Texas Instruments www.ti.com
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