Texas – New step-down converter provides highest efficiency at light loads (TPS62175)

A new synchronous 28V / 500mA step-down DC-DC converter that can operate at less than 5uA during ‘sleep’ mode, the TPS62175 has been unveiled by Texas Instruments (TI).

The device maintains high efficiency during light load operation, while supporting ultra-low power microcontrollers that operate in 12V, 15V and 24V applications, such as industrial sensor, smart meter, medical and wireless power transmission designs.

The device achieves greater than 70-percent efficiency at 100uA, operates with less than 5uA quiescent current in sleep mode and 20uA typically in regular mode. It supports microcontroller systems with extreme standby power requirements and output voltage accuracy and supports TI’s Stellaris ARM Cortex-M4F series of microcontrollers. The device requires only three cost-efficient external components; and comes in a tiny 10-pin 2mm by 3mm WSON package with a 68mm2 total solution size.

The TPS62175 features TI’s patented DCS-Control regulation topology, which combines hysteretic and voltage-mode control in a single device, resulting in ‘excellent’ AC line and transient load regulation. DCS-Control also provides DC accuracy through a voltage feedback loop, and creates a seamless transition between high- and light-load (power save) operation.