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NCV8603SN33T1G Datasheet(PDF) 9 Page - ON Semiconductor |
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NCV8603SN33T1G Datasheet(HTML) 9 Page - ON Semiconductor |
9 / 10 page NCV8603 http://onsemi.com 9 Noise Decoupling The NCV8603 is a low noise regulator and needs no external noise reduction capacitor. Unlike other low noise regulators which require an external capacitor and have slow startup times, the NCV8603 operates without a noise reduction capacitor, has a typical 15 ms start up delay and achieves a 50 mVrms overall noise level between 10 Hz and 100 kHz. Enable Operation The enable pin will turn the regulator on or off. The threshold limits are covered in the electrical characteristics table in this data sheet. The turn−on/turn−off transient voltage being supplied to the enable pin should exceed a slew rate of 10 mV/ ms to ensure correct operation. If the enable function is not to be used then the pin should be connected to Vin. Thermal As power in the NCV8603 increases, it might become necessary to provide some thermal relief. The maximum power dissipation supported by the device is dependent upon board design and layout. Mounting pad configuration on the PCB, the board material, and the ambient temperature affect the rate of junction temperature rise for the part. When the NCV8603 has good thermal conductivity through the PCB, the junction temperature will be relatively low with high power applications. The maximum dissipation the NCV8603 can handle is given by: PD(MAX) + TJ(MAX) * TA RqJA (eq. 1) Since TJ is not recommended to exceed 125_C (TJ(MAX)), then the NCV8603 can dissipate up to 465 mW when the ambient temperature (TA) is 25_C and the device is assembled on 1 oz PCB with 645 mm2 area. The power dissipated by the NCV8603 can be calculated from the following equations: PD [ VIN(IGND@IOUT) ) IOUT(VIN * VOUT) (eq. 2) or VIN(MAX) [ PD(MAX) ) (VOUT IOUT) IOUT ) IGND (eq. 3) Hints Vin and GND printed circuit board traces should be as wide as possible. When the impedance of these traces is high, there is a chance to pick up noise or cause the regulator to malfunction. Place external components, especially the output capacitor, as close as possible to the NCV8603, and make traces as short as possible. DEVICE ORDERING INFORMATION Device Marking Code Version Package Shipping† NCV8603SN33T1G* ADW 3.3 V TSOP−5 (Pb−Free) 3000/Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable |
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