New Industry Products

National Semi Unveils LM2731/LM2733 Regulators

March 02, 2003 by Jeff Shepard

National Semiconductor (Santa Clara, CA) introduced its new LM2731 and LM2733 boost regulators in a tiny package, which combine current-mode control, sub-miniature packaging and high switching frequency using National’s analog bipolar CMOS DMOS (ABCD)150 process. The regulators are suitable for USB modems, digital cameras, cellular handsets and a host of space-constrained applications.

The regulators enable a high-performance, 3W, step-up converter in a PCB area of less than 0.8cm² to meet the power needs of digital cameras, cell phones, PCMCIA and USB peripherals, and DSL modems. The LM2731 and LM2733 operate at 600kHz or 1.6MHz switching frequency, are housed in a SOT23, five-pin package and utilize current-mode control for superior load and line regulation. The LM2731 has a 22V, 1.5A switch, and the LM2733 has a 1A, 40V switch.

The LM2731 and LM2733 boost regulators are available for shipment now. The two devices are priced at $1.08 each in 1,000-unit quantities.