??? 02/08/08 23:28 Read: times |
#150506 - Actuall, you were right, in part ... Responding to: ???'s previous message |
Tony Van Lennep said:
2.54mm is actually 2.54cm
That 100nf cap is a ceramic one The input and output capacitors should be as near as possible to the regulator, particularly the output capacitor, though I think the values you suggested are a bit large. I believe the 2.54 mm is more nearly correct. Too large an output capacitance, BTW, particularly the one right at the output, will have negative impact on load regulation. NSC, just to mention one manufacturer, has, for decades, recommended various sizes at the input, but seldom other than 2.2 uF tantalum at the output. All my bypass cap's on my hand-wired circuits are 0603's soldered directly to the socket pins on the wiring side and to the ground or power plane as needed, which makes the distance from cap to IC pin in the 2-3 mm range. I've never had cause to regret that. RE |