Free Newsletter
Register for our Free Newsletters
Newsletter
Zones
Advanced Composites
LeftNav
Aerospace
LeftNav
Amorphous Metal Structures
LeftNav
Analysis and Simulation
LeftNav
Asbestos and Substitutes
LeftNav
Associations, Research Organisations and Universities
LeftNav
Automation Equipment
LeftNav
Automotive
LeftNav
Biomaterials
LeftNav
Building Materials
LeftNav
Bulk Handling and Storage
LeftNav
CFCs and Substitutes
LeftNav
Company
LeftNav
Components
LeftNav
Consultancy
LeftNav
View All
Other Carouselweb publications
Carousel Web
Defense File
New Materials
Pro Health Zone
Pro Manufacturing Zone
Pro Security Zone
Web Lec
Pro Engineering Zone
 
 
 
News

New Vishay Siliconix LDOs offer industry's lowest dropout voltage at 300

Vishay Electronic : 14 April, 2003  (New Product)
Two new 300-mA low-noise low dropout regulators, each packaged in a 3 mm x 3 mm PowerPAK MLP33, were released today by Siliconix incorporated, an 80.4%-owned subsidiary of Vishay Intertechnology, Inc. Designed for use in battery-powered equipment such as cell phones, wireless handsets and modems, PDAs, notebooks, pagers and digital cameras, the new ICs are small enough to fit on tiny circuit boards in miniaturized wireless devices while handling up to 1.2 W of power dissipation. The Si91871 and Si91872 feature a low ground current, ideal for low-voltage battery-operated power systems, and low dropout voltage of 250 mV at 300 mA, prolonging battery life in portable electronics.
Two new 300-mA low-noise low dropout regulators, each packaged in a 3 mm x 3 mm PowerPAK MLP33, were released today by Siliconix incorporated, an 80.4%-owned subsidiary of Vishay Intertechnology, Inc.

Designed for use in battery-powered equipment such as cell phones, wireless handsets and modems, PDAs, notebooks, pagers and digital cameras, the new ICs are small enough to fit on tiny circuit boards in miniaturized wireless devices while handling up to 1.2 W of power dissipation.

The Si91871 and Si91872 feature a low ground current, ideal for low-voltage battery-operated power systems, and low dropout voltage of 250 mV at 300 mA, prolonging battery life in portable electronics.

Designed to maintain regulation while delivering 400-mA peak output current in applications with high surge currents at turn-on, the Si91871 and Si91872 are available in a range of 14 fixed output voltage options from 1.2 V to 5.0 V. Both devices feature 1.5% guaranteed output voltage accuracy, a fast start-up time of 60 s, and fast transient response of ≤ 30 s. A built-in active pull-down clamp circuit improves transient response and regulation by actively sinking current from the output if it exceeds the desired regulation voltage. Both devices discharge the output during shutdown mode through a 100-Ω n-channel MOSFET. Integrated short-circuit and thermal protection ensure reliable operation. Reverse battery protection limits reverse current flow to a 1-A maximum shutdown current. When no output is required, an ON/OFF feature allows digital circuitry to shut off the device to save power.

Designers will choose between the Si91871 and Si91872 depending on the specifics of their application. The Si91871 is especially suited for sensitive RF receiver or audio amplifier environments, with an external noise bypass capacitors that reduces output noise to just 30 V(rms), while the Si91872 provides an out-of-regulation error flag.

The Si91871 and Si91872 may be used with low-ESR ceramic capacitors or tantalum capacitors, giving designers a flexible choice of magnetic components.

Samples and production quantities of the new devices are available now for most voltage options, with lead times of 8 to 10 weeks for larger orders.
Bookmark and Share
 
Home I Editor's Blog I News by Zone I News by Date I News by Category I Special Reports I Directory I Events I Advertise I Submit Your News I About Us I Guides
 
   © 2012 NewMaterials.com
Netgains Logo