Power Electronics

28-V, 500-mA Step-Down Converter

Texas Instruments Incorporated introduced a synchronous, 28-V, 500-mA step-down DC/DC converter that can operate at less than 5 uA during "sleep" mode. The new TPS62175 maintains high efficiency during light load operation, while supporting ultra-low power microcontrollers that operate in 12-V, 15-V and 24-V applications, such as industrial sensor, smart meter, medical and wireless power transmission designs.

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.

The TPS62175 comes in a 10-pin, 2-mm by 3-mm WSON package and is priced at US$0.95 in 1,000-unit quantities. Designers can order the TPS62175EVM-098 evaluation module to test the device's operation and functionality when converting from 4.75 V to 28 V to a regulated 3.3-V output voltage.

Features:

  • Highest efficiency at light loads: Achieves greater than 70-percent efficiency at 100 uA; operates with less than 5-uA quiescent current in sleep mode and 20 uA typically in regular mode.
  • Supports microcontroller systems with extreme standby power requirements and output voltage accuracy: Supports TI's Stellaris® ARM® Cortex™-M4F series of microcontrollers.
  • Smallest solution: Requires only three cost-efficient external components; and comes in a tiny 2-mm by 3-mm WSON package with a 68-mm2 total solution size.

Texas Instruments
Part Number: TPS62175

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