Smallest TVS protection diode; barely-visible 01005 package is 0.4 x 0.2 mm

April 08, 2013 // By Graham Prophet
ST claims the world’s smallest TVS (transient voltage suppression) protection diode: the ESDAVLC6-1BV2 is first such device offered in 01005 outline, the industry’s smallest standard-size surface-mount package.

The size reduction from 0.6 x 0.3mm (the previous smallest outline) to 0.4 x 0.2mm delivers significant benefit for designers dealing with severe space limitations in mobile products; as a TVS diode, ESDAVLC6-1BV2 provides superior protection compared to varistors in the same outline. You can, ST says, save space in mobile products while providing mandatory over-voltage protection. “A complete motion-sensing IC for features such as indoor navigation and advanced user interface, such as ST’s LSM303D, measures just 3 x 3mm, while some power chips are as small as 2 x 2mm,” explains Eric Paris, Product Marketing Director, ASD & IPAD Division, STMicroelectronics. “Trimming 0.2mm or 0.1mm from each TVS can simplify placing components and routing connections, especially if the design contains several such devices.”

The ESDAVLC6-1BV2 TVS diode fully satisfies the protection requirements specified in the international standard IEC 61000-4-2. Although other types of electrostatic-discharge (ESD) protectors, such as varistors, are available in the same size, these generally do not protect as effectively. ST’s new ESDAVLC6-1BV2 has a clamping voltage half that of the nearest competing varistor in the same size package, offering greater safety for the internal components. Although useful in many applications, varistors also age, providing progressively less protection with each ESD event clamped. ESDAVLC6-1BV2 features; bidirectional operation, so a single part number fulfils multiple roles on pc-board; a bandwidth of 1GHz; line capacitance of 7.5pF; a breakdown voltage of 6V; and ultra-thin 0.2mm package height. Pricing is $0.10 (1,000).

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