Texas Instruments adds 20-percent run-time to ultra-low power wireless applications with 3-MHz, 100-mA step-down DC/DC converter

Texas Instruments Incorporated has introduced a 3-MHz, 100-mA synchronous step-down DC/DC converter, which integrates a bypass switch and a unique DCS-Control technology. The new device extends battery run-time by 20 percent in low-power wireless and MSP430™ MCU-based applications, when compared to competing solutions. The high-performance device has an operating current of only 25 uA and supports many low-power applications, such as Bluetooth® low-energy systems, metering and building technologies, mobile phones, consumer electronics, medical and human interface devices.



The TPS62730 achieves 95-percent conversion efficiency and reduces current consumption drawn from the battery in transmit and receive modes. The device's ultra-low power bypass switch only consumes 30 nA of current for sleep and low power modes. The TPS62730 converter also generates less than 15 mVpp typical output voltage ripple, providing low noise to low-power RF applications, such as those powered by TI's 2.4-GHz CC2540 and CC430 system-on-chip (SOC) solutions. To order samples and an evaluation module or to download the datasheet and SwitcherPro™ design tool and PSpice® and TINA-TI™ models of the TPS62730, visit: www.ti.com/tps62730-pr.



DCS-Control technology



DCS-Control ™ technology is an advanced regulation topology that combines the advantages of hysteretic and voltage mode control within a single device, enabling excellent AC line and transient load regulation. The feature provides a seamless transition between high-load and light-load (power save) operation. An additional voltage feedback loop also ensures DC accuracy. DCS-Control technology alleviates the need to research external filtering components, thus reducing associated space and cost.



Key features and benefits



* Excellent low-output voltage ripple (

* Small solution size of 12 mm2: 3-MHz frequency and fixed output voltage options require only three external components.

* Input-voltage range of 1.9 V to 3.9 V supports Li-primary battery chemistries such as Li-SOCI2, LiSo2 and Li-MnO2, and also two alkaline batteries.

* Ultra-low-power shutdown/bypass-mode current of 30 nA, typical, supports the sleep and low-power modes of modern RF transceivers.