Semtech rolls out low-noise, dual linear regulator

Newbury Park, California–Semtech Corp., a supplier of mixed-signal semiconductors for communications, computers, and industrial equipment, today announced production-level availability of the SC1454 150mA, a low-noise, dual linear regulator.

The device features the small packaging, low quiescent current, and low dropout voltage necessary for portable, battery-powered products. The SC1454 is also a dual Ultra Low Dropout Regulator (ULDO) designed to fully support a single- cell Li-Ion battery or four-cell NiMH/Alkaline applications, such as portable instrumentation, DSP-based applications such as cell phones, personal digital assistants, pagers, and PCMCIA cards.

The SC1454 contains two independently enabled, ULDO voltage regulators, which operate from a single input voltage range of 2.25V to 6.5V with a wide variety of output voltage options available as standard offerings. One ULDO has a fixed output, and the other is made either fixed or adjustable by using external resistors.

The device is designed for use with low ESR ceramic capacitors to save cost and PCB area. Additionally, the device has a bypass pin to enable the user to capacitively decouple the bandgap reference for very low output noise (down to 50uVrms).

“The SC1454 allows designers the flexibility of having many standard output voltage pairs available in one space-saving package,” says Eddie Yeow, director of portable power management products for Semtech Corp. “It represents another device in our portfolio of portable power management products which offer specific solutions without including unnecessary, costly features.”

The SC1454, packaged in a low-profile MSOP-8, will be available through Semtech’s network of direct sales representatives and distributors, and is priced at $1.25 for 1,000 unit quantities.


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