High performance DAC and fake LDO, how to get success?

iWoofer

High performance DAC and fake LDO, how to get success? I working with ES9038Q2M DAC which really need high class LDO IC for power 3.3V. However, after 3 attempts to get tps79133 and ADP150 on ta08a0, I got 3 times fake, and very bad fake! PSRR was 2 times less than AMS1117, which is cheapest on the market LDO. So they selling 100% garbage with 28db PSRR(that's typical regulation quality for 2 transistors and 1 zener circuity), and your DAC will work much better even with AMS1117. My question addressed to DAC diyers, guys, where you buying an original LDO? I happy only with MPS LDOs which are cheap and good but never fake due to the company not so famous. Actually, ADP150 is also not expensive(30 cents) and I see no reason to make fake of that at all!

高性能DAC和假LDO，如何获得成功？ 我使用的是ES9038Q2M DAC，它真的需要高功率的3.3V DCO IC。 但是，经过3次尝试在ta08a0上获得tps79133和ADP150后，我得到3次假装，非常糟糕假！ PSRR比AMS1117低2倍，AMS1117是市场上最便宜的LDO。 因此，他们以28db PSRR（这是2个晶体管和1个齐纳电流的典型调节质量）销售100％垃圾，即使使用AMS1117，您的DAC也能更好地工作。 我的问题是针对DAC diyers，伙计们，你在哪里购买原装LDO？ 我只对MPS LDO感到高兴，因为公司并不那么出名，所以它既便宜又好又不假。 实际上，ADP150也不贵（30美分），我认为没有理由假装它！

啸竹

DEAR E1 ：

    Four best international distributors ： digikey ，RS，Mouser，element ；

     A local distributor in China ： szlcsc （Chinese name 嘉立创 Can also produce PCB and PCB samples and SMT ）

zying

美军都要买到假原件，这个不奇怪！

lylnk

why not use ams1117 follow lc filter? 330uh and 1mf cap will block >250hz noise. 1117 psrr below

lylnk

250hz is about 80db.

z-raymond

LT的电源芯片假货多不多啊？最近一直都是用它家的

iWoofer

MPS ICs are never fake.

啸竹

iWoofer 发表于 2019-9-13 10:38
MPS ICs are never fake.

try :
https://item.szlcsc.com/53521.html   OR   https://so.szlcsc.com/global.html?k=3.3V%2520LDO
MicroChip  TC1262-3.3VDBTR    （SOT-223）
PSRR 1K = 64DB
MAX Iout = 500mA
Max  Vin-Vout@500mA = 650mV
Price 100+ Pcs = each one 2.76 RMB