Micro-packaged ESD protection diodes and Schottkys for portable applications

24 January 2007 Circuit & System Protection

ON Semiconductor has introduced three new ESD diodes and three Schottky diodes in an ultra small SOD-923 package. The package measures a mere 1,0 x 0,6 with a 0,4 mm profile. These diodes are intended for portable, consumer and wireless products requiring efficient power and best in class ESD protection using minimal board space.

ESD protection diodes

The ESD9X3.3S, ESD9X5.0S and ESD9X12S are designed to clamp fast-rising ESD pulses to prevent damage to voltage-sensitive components on the board. These devices provide the highest level of ESD protection available in the SOD-923 package as measured by the IEC61000-4-2 ESD compliance standard, according to the manufacturer. Their small size facilitates placement near input/output ports where ESD can enter the system. As such, the devices suppress the transient voltage before it can be coupled into the rest of the board. The ESD9X series of diodes feature lower clamping voltage and lower leakage than multilayer varistors of comparable size.

Schottky barrier diodes

The NSR0130P, NSR0230P, and NSR0140P are Schottky barrier diodes designed for high-speed switching applications and use in discrete boost and buck conversion. Featuring extremely low forward voltage (Vf) to reduce conduction losses, these new Schottkys are more efficient than integrated solution alternatives, says On Semiconductor. The devices provide design flexibility and power savings by creating a DC supply at voltages not already available from a given power management unit (PMU). Additionally, the flexibility inherent in these Schottkys helps designers incorporate expanded features that require diverse voltage requirements. Such features could include camera, camera flash and LED backlighting.

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