28V step-down konverter med høj effektivitet ved lette belastninger
Texas Instruments lancerer letanvendelig regulator med DCS-Contro, der supporterer 12V, 15V og 24-V POL applikationer som sensorer og smart meters (in english).
Texas Instruments (TI) has 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.
Key features and benefits of TPS62175 according to TI:
• 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.
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. 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.
For samples, WEBENCH design tool and evaluation module:
www.ti.com/tps62175-pr-eu.
