TI 3MHz, 100mA Step-Down DC-DC Converter Adds 20% Run-time to Low Power Wireless & MCU Applications
Texas Instruments Inc. (TI) introduced a 3-MHz, 100mA synchronous step-down dc-dc converter, which integrates a bypass switch and a unique DCS-Control technology and extends battery run-time by 20% in low-power wireless and MSP430™ MCU-based applications. The high-performance device has an operating current of only 25µA 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 reduces current consumption drawn from the battery in transmit and receive modes by achieving 95% power conversion efficiency and an on-chip bypass switch with only 30-nA of power. The converter also generates less than 15mVpp typical output voltage ripple, allowing it to support many low-power RF applications, such as those powered by TI’s 2.4-GHz CC2540 and CC430 system-on-chip (SOC) solutions.
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 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 include: the TPS62730 features DCS-Control with what is described as excellent ac-line and load transient regulation; low-output voltage ripple (<15mVpp typical) over the entire load range, which makes this part ideal for RF applications; 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 to 3.9V supports Li-primary battery chemistries such as Li-SOCI2, LiSo2, Li-MnO2 and also two alkaline batteries; ultra-low-power shutdown/bypass-mode current of typical 30nA supports sleep and low power modes of modern RF transceivers; and dc-dc operation mode provides regulated output voltage consuming typical 25µA quiescent current.
The TPS62730 is available now in a small, 6-pin, 1 x 1.5 x 0.6mm SON package, priced at $0.85 in quantities of 1,000.
