Ultra-slim TVS Diodes with Effective ESD Protection for Miniaturized ICT Solutions

Published  June 29, 2021   0
Micro-Packaged TVS Diodes From TDK

Expanding its range of TVS (transient voltage suppression) diodes, TDK Corporation has introduced two new micro-packaged TVS diodes designed specifically to protect voltage-sensitive components from ESD for existing and future applications within IoT, smart home, or Industry 4.0. The new compact TVS diodes - SD01005SL-ULC101 (B74111U0033M060) and SD0201SL-ULC101 (B74121U0033M060) offer extremely low capacitances and clamping voltages, extremely low leakage, and great ESD protection.

Designed in accordance with IEC 61000-4-2 for an ESD contact discharge of up to 15 kV, these devices offer a maximum operating voltage of 3.3 V. Extremely short response times and the extremely low leakage current of ~1 nA at 3.3 V, extremely low clamping voltage of ~3.8 V at a peak pulse current of 8 A or 16 A at ~5 V and a breakdown voltage of 6.3 V are the other notable features of these devices.

The SD01005SL-ULC101 (B74111U0033M060) type has a minimum capacitance of ~0.5 pF and the SD0201SL-ULC101 (B74121U0033M060) type of ~0.6 pF, both at 1 MHz. These diodes come in Wafer-Level Chip Scale Package (WL-CSP) and measure a mere 400 x 200 µm (WL-CSP01005) or 600 x 300 µm (WL-CSP0201) with a height of 100 µm in the 01005 size or 150 µm in the 0201 size.

Key Features of the TVS Diodes

  • Capacitance: just ~0.5 pF or ~0.6 pF at 1 MHz
  • Clamping voltage: ~3.8 V at a peak pulse current of 8 A
  • Size: 400 x 200 µm (WL-CSP01005) or 600 x 300 µm
  • ESD protection to IEC 61000-4-2 up to 15 kV contact discharge
  • High surge current loads of up to 7 A according to IEC 61000-4-5 (8/20 µs)

The devices are suitable for reliable ESD protection of high-speed interface ICs and data lines such as USB 3.1, USB 3.2, HDMI, FireWire, and Thunderbolt due to their parasitic capacitances and clamping voltage. These components find application in smartphones, notebooks, tablets, wearables, and ESD sensitive network components.