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Infineon touts 'smallest' TVS diodes

Posted: 21 Dec 2007     Print Version  Bookmark and Share

Keywords:TVS diode  ESD protection  mobile application 

'Smallest' TVS diode

Infineon Technologies AG has developed what it claims to be the smallest transient voltage suppression (TVS) diodes with a footprint of 0.6-by-0.3mm and a 0.3mm high.

The ESD series diode is designed to protect the latest electronic communication and consumer devices against electrostatic overvoltages. The TVS diode can absorb ESD as high as 20kV and has a response time of less than 0.5ns.

The company offers both unidirectional and bidirectional versions of the diode to support a range of different applications. With a low profile, the diodes support the current trend toward increasingly flat devices in mobile communications, and with the low parasitic capacitance, they are suited for use in high-speed data communications.

The ESD8V0R1B-02LS is a bidirectional TVS diode designed for use in a wide voltage range from -8 to 14V. With a parasitic capacitance of 4pF, it ensures signal integrity on high-speed interfaces like USB 2.0 and Firewire in electronic equipment like mobile phones, MP3 players, and digital video and still cameras.

At less than 1nA, its leakage current, an important factor in battery-powered devices, is claimed to be lowest in the industry. The diode's low breakdown voltage of 17V protects electronics reliably against transients and ESD.

For equipment interfaces operating at higher data rates, such as HDMI (1.65Gbit/s) or S-ATA (3Gbit/s), Infineon offers the unidirectional ESD5V3U1U-02LS TVS diode. In this variant, the parasitic capacitance has been reduced by a factor of 10 to 0.4pF. The diode is designed for applications with an operating voltage of 3.3V or 5.3V. The diode has contact discharge of more than 20kV (to IEC61000-4-2) and a clamping voltage of 12V or 4V in the negative direction.

"As feature sizes continue to shrink and the trend toward higher data rates progresses, highly integrated chips are becoming increasingly sensitive, placing tougher demands on ESD components," says Holger Homann, marketing director for Infineon?s TVS segment. "The only way to ensure stable operation and maximum reliability in today?s communications electronics is to ensure equipment is properly protected against ESD and transients. This means TVS diodes are a key quality feature. Industry wide, our ESD protection diodes are the smallest TVS diodes available, and we are a full-line supplier manufacturing high volumes."

Both ESD8V0R1B-02LS and ESD5V3U1U-02LS are available in RoHS-compliant TSSLP-2-1 packs.

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