Wireless Applications

Vishay Releases SiP21110 250-mA LDO Voltage Regulator

October 10, 2008

The device offers 35-µA ground current, which extends battery run times in portable electronics, and provides adjustable output and 1.0 % output voltage accuracy in a SOT23-5L package.


MALVERN, PA /Marketwire/ -- Vishay Intertechnology Inc. extended its LDO product family portfolio with the release of the new SiP21110 250-mA LDO voltage regulator. The cost-effective device features a 35-µA typical ground current at a 1-mA load in the space-saving SOT23-5L package.

The SiP21110's ultra-low ground current helps to extend battery run times between charges in battery-operated power systems and portable electronics, such as cell phones and wireless handsets, PDAs, digital cameras, pagers, wireless modems, and medical handheld devices.

The SiP21110 features adjustable output from 1.3 V to 5 V, with an external resistor network and a 1.0% output voltage accuracy at 25°C. Its advanced design architecture allows stable operation with very small low-ESR ceramic output capacitors, reducing board space and component cost. Additional SiP21110 features include excellent transient response, low peak-to-peak transient output voltage with fast recovery time, as well as high PSRR, while consuming a minimum of current.

The device is designed to maintain regulation while delivering 330-mA typical peak current for systems with a high surge current upon turn-on. During start-up, an active pull-down circuit improves the output transient response and regulation. In shutdown mode, the output automatically discharges by connecting the output to ground through a 100-ohm n-channel MOSFET.

For safe operation, the device offers thermal overload (160°C typical) and built-in short-circuit protection (500 mA typical), with a 1-µA maximum shutdown current at 85°C. The SiP21110 operates over a junction temperature range of –40°C to 125°C.

Link to SiP21110 datasheet online.

Samples and production quantities of the new SiP21110 LDO voltage regulator are available now, with lead times of eight weeks for larger orders.

About Vishay
Vishay Intertechnology Inc., a Fortune 1000 Company, is one of the world's largest manufacturers of discrete semiconductors (diodes, rectifiers, transistors, and optoelectronics and selected ICs) and passive electronic components (resistors, capacitors, inductors, sensors, and transducers). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, and medical markets. Its product innovations, successful acquisition strategy, and ability to provide one-stop shop service have made Vishay a global industry leader.


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