The last two months suddenly ultra-low power circuit from the interest, just two days before the company has a small project, the need to design a 1.5 v battery boost circuit. Output to 3.3 v 100MA. Of course, boost the election integrated circuit DC / DC Rafah, the external components more less more best . Mind immediately thought of MAXIM, MAXIM fact, there are several things kind of performance in the industry is really good. Samples of applications is also extremely convenient. I chose a MAX1674, the importation of 1.1 to 5.5 v, output 3.3 v, no-load current is about 16 uA, performance or very good manner. Samples of hand immediately thermal transfer. After the actual measurement, 1.55 v input voltage unladen 60 uA, SHDN model 10 uA, 10uA appears to be tantalum capacitor leakage, it is the no-load current 50 uA, or very large (I think, in fact DC / DC chips now This is the manufacturing level). Circuit decided to increase it to be transformed. To make no-load current of less than 3 uA
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29Aug
Posted by admin @ 9:27 pm