Supertex inc. FP0030 Low Voltage Protection Switch Features ►► ►► ►► ►► ►► General Description The Supertex FP0030 is a 20V current limiting protection device. It is designed to protect Ethernet systems from high transient voltages. Up to ±20V input voltage protection Low on-resistance - 6.5Ω typical Fast switching speed Effectively, a simple two terminal device No external power supplies needed The FP0030 can be considered as a normally closed switch with a typical switch resistance of 6.5Ω. The device starts to turn off when the voltage drop across the two terminals exceeds a nominal value of ±1.5V. In the off state, the FP0030 can withstand up to ±20V across its terminals. A small amount of current, typical 800µA is allowed to flow through the device. Applications ►► ►► ►► ►► Ethernet system protection Resettable fuse High side switch Data acquisition The FP0030 can also be used as a resettable fuse to protect power lines against output short circuit conditions. The FP0030 is available in a 3-Lead SOT-23 package. Typical Application Circuit 3.3V 3.3V Data Line 1 FP0030 3.3V Ethernet Port Doc.# DSFP-FP0030 A072312 3.3V FP0030 Data Line 2 Supertex inc. www.supertex.com FP0030 Ordering Information Part Number Package Packing FP0030K1-G 3-Lead SOT-23 3000/Reel -G indicates package is RoHS compliant (‘Green’) Pin Configuration Absolute Maximum Ratings Parameter Value VA-B, Differential voltage drop SUB 0 to ±22V Maximum junction temperature +125°C Storage temperature range -65° to +150°C Power dissipation, TA@25°C 360mW B 1 A Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Continuous operation of the device at the absolute rating level may affect device reliability. All voltages are referenced to device ground. SOT-23 (K1) Product Marking Note: 1. Mounted on FR4 board, 25mm x 25mm x 1.57mm. Package θja 3-Lead SOT-23 203OC/W W = Code for week sealed = “Green” Packaging F03W Typical Thermal Resistance Package may or may not include the following marks: Si or SOT-23 (K1) Electrical Characteristics (T = 25 C unless otherwise specified) j O Sym Parameter Min Typ Max Units Conditions BVA-B Differential input voltage range from A to B ±20 - - V IA-B = ±2.0mA RSW Switch ON-resistance from A to B - 6.5 8.5 Ω IA-B = ±50mA, VA or VB = 0V VTRIP VA-B trip point to turn off - ±1.5 - V --- VOFF Switch turn off voltage - ±3.2 - V IA-B = ±1.0mA Switch off current - ±800 ±1500 µA VA-B = ±15V IPEAK Peak switching current - ±155 - mA --- TOFF Turn off time - 30 60 ns See Figure 1 TON Turn on time - 1.0 2.0 µs See Figure 2 CSW(ON) Switch ON-capacitance from A to B or B to A - 32 - pF SW = ON CSW(OFF) Switch OFF-capacitance from A to B or B to A - 11 - pF VSW = 10V -40 - +125 IA-B(OFF) Tj Operating junction temperature Doc.# DSFP-FP0030 A072312 2 C O --- Supertex inc. www.supertex.com FP0030 Block Diagram A B Switch Control Typical I-V Characteristics IA-B +IPEAK IA-B = +800µA +1.0mA -15V -VOFF -VTRIP +VTRIP +VOFF +15V -1.0mA IA-B = -800µA RSW = 6.5Ω -IPEAK Doc.# DSFP-FP0030 A072312 3 Supertex inc. www.supertex.com FP0030 Functional Description The Supertex FP0030 can be considered as a normally closed switch controlled by a switch control (please refer to the block diagram). The switch control monitors the voltage drop across terminals A and B. If the voltage difference is greater than ±1.5V, the switch will start to open. Once in the open state, only a small amount of current, typical 800µA, flows through the switch to detect if the high voltage is still present or not. The switch will not close until the voltage across terminal A and B drops below ±1.5V. Test Circuits for TON and TOFF +10V 500ns pulse width 10V A 0V TX A FP0030 0V 2.0V B B 10Ω 10% TOFF Figure 1: TOFF Test Circuit 10V 1.0V +10V 0V 100Ω 0V TX A 2.0ms pulse width A FP0030 2.0V 1.0V B B 0V 10% TON Figure 2: TON Test Circuit Pin Description Pin Name A SUB B Doc.# DSFP-FP0030 A072312 Description Switch terminal A Internally connect to the back of the die. Leave floating. DO NOT GROUND! Switch terminal B 4 Supertex inc. www.supertex.com FP0030 3-Lead TO-236AB (SOT-23) Package Outline (K1) 2.90x1.30mm body, 1.12mm height (max), 1.90mm pitch D 3 E1 E Gauge Plane 0.25 1 e b e1 Seating Plane L L1 2 View B Top View View B A A A2 Seating Plane A1 Side View Symbol Dimension (mm) View A - A A A A1 A2 b D E E1 MIN 0.89 0.01 0.88 0.30 2.80 2.10 1.20 NOM - - 0.95 - 2.90 - 1.30 MAX 1.12 0.10 1.02 0.50 3.04 2.64 1.40 e e1 0.95 BSC 1.90 BSC L 0.20† 0.50 0.60 L1 0.54 REF θ 0O 8O JEDEC Registration TO-236, Variation AB, Issue H, Jan. 1999. † This dimension differs from the JEDEC drawing. Drawings not to scale. Supertex Doc.#: DSPD-3TO236ABK1, Version C041309. (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to http://www.supertex.com/packaging.html.) Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com) Supertex inc. ©2012 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSFP-FP0030 A072312 5 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com