Trade.Information

Product Name: 1-amp buck regulator can be programmed to one of four output voltages

Product Description

Camarillo, Calif.—Semtech's SC194B is a 1-amp DC/DC buck regulator that can be programmed to deliver 2.5, 3, 3.3, or 3.6 volts. "The SC194B addresses the I/O voltage rail with the same high performance and small size benefits that the SC194A (a sister part which can be programmed between 1 and 1.8 volts) delivers for the microprocessor core voltage," said Karl Volk, Director of Marketing for the Handheld Power Management Group. "Not only do the high efficiency and ultra-low quiescent current reduce heat and extend battery life, but the SC194B's digitally-controlled output voltage minimizes PCB area by eliminating external feedback while still allowing our customers to purchase and manage inventory for only one device to meet the 2.5- to 3.6-volt needs of many designs." The device's two programming pins can be tied to a microcontroller and dynamically switched. The regulator, working from a 2.7- to 5.5-volt input, features up to 95 percent efficiency at 3.3 volts (200 mA output). An automatic power save mode (PSAVE) uses pulse frequency modulation (PFM) at light loads to maintain very high device efficiency. While in PSAVE mode, the device quiescent current is only 17 microamps. Additionally, the chip's flexible clocking scheme allows the engineer to select the internal 1 MHz fixed clock or connect the device to an external oscillator between 750 kHz and 1.25 MHz. The SC194B has built-in soft-start, short-circuit, over-voltage and temperature protection features. Click here for the product datasheet. The SC194B, in a 3-by-3 mm lead-free and RoHS compliant MLP-10 package, is priced at $1.69 each in 1,000-piece lots. Semtech offers comprehensive design assistance, including field- and factory-based support. Volume pricing, and delivery quotes, as well as evaluation kits and samples, are available by contacting