 All right the great search brought to you by digikey and age for it Thank you digikey for making this segment possible Idiot users are powers of engineering and her Decades almost now of using the digikey site to find parts you need Kind of important now because it's hard to find some parts. Yes, theoretically if someone was looking for a part Maybe this week we're gonna Help them figure that out Yeah, I take inspiration because I think the people you know what people are publicly talking about is what people are privately struggling with and We had that quote from last week for the article where I think you know, we were we were quoting about How hard it is to get parts and it's a struggle and like things get delayed and also we mentioned the great search was a Good place to go if you have questions go to discord. Tell us what part you're looking for and we will help you so this week Um Let's go to the computer. So I we got this notice for a crowd. You're you're a crowdfund Backer of this project. Yeah the Glasgow interface Explorer And I thought this was interesting because they were having problems having a part and I thought like I'm not saying I'm going to find that part I'm just saying here's how I would go about trying to find alternative How would I solve it and I'm sure they have very good reasons for the reason they're they're doing what they're doing So this is not to say I know better than them. I'm just I'm just taking inspiration. Yeah, so anytime we see anyone talking about parts We're like, oh, how will we get that? Yeah? So the last missing part that they have is a TPS 73 one-on-one DB VT LDO voltage regulator for GPO bank control they ordered it they can get it and then like people are like scalping it And they're like we're looking for parts, but the TPS 73 one-on-one is a pretty unique part besides a reverse polarity protection also has fold back current limit And that's one of the things that they like so they like that. There's this feed. There's this back current limiting capability So I thought that was interesting because I never really specced aboard with that part and I do want to mention So if you go to You know the TPS 78 101 sorry 73 one-on-one Which of course is not in stock here because if it wasn't something buy it So this part The fold back current isn't something that's that's listed in the Susfications they have, you know over current over temperature in short circuit inverse polarity But those are like additional product features. Those aren't things that you can select for The digi-key search is really really strong when you're talking about Quantitative Qualities of your of your chip. So, you know, you're like, what's the input voltage max? What's the current output max? What's the inductance? What's the the queue? What's the ESR? All of these things, you know for your components That's where the digi-key search is really really great but when you're talking about like Qualitative things where it's like does it have this feature? That's where it's gonna get a lot tougher because You know, it's it's not something you usually look up in a data sheet Fold back current like I said, it's not it's not in there Like you might say well, that's short circuit protection or over current protection But it sounds like it's a very specific capability that they're looking for in this regulator and so that's why For this if I was going to find I'll turn it for this part. Well, first off, you know, this part is a SOP 23 5 LDO Having dealt with SOP 23 LDOs, you know, this is a very standard package in size So anything that we've regulated that we find with this package overall the pinouts gonna be the same because like every SOP 23 5 regulator of ever see I mean like of course check the data sheet But it's it's I've never seen one that doesn't have the exact same pinout from one to the other It's a very standardized pinout. Thankfully not always true. You know transistors don't even know if three pins and they don't have a standard pinout But this chip does so yes, and this part is you know, not available and they're like we're not gonna have any till 2022 maybe you don't want to wait till 2022 So this is actually where I would go to digiki. That's right to ti not to digiki and look at what ti recommends because One thing that I know from working with ti parts is they often have they often section out their regulators into Capability slots so for example Let's go to like We have like the TPS TPS 6102 3 so the 6102 3 Regular this is like a boost converter From what I remember this is part of a family and it was like the 6102 3 and 6102 1 and Etc. Etc. There was like a family of them Yeah, so there's there's always gonna be like within that part number There's usually like a family of parts, so they'll start with the first few numbers But then like one will be like a two amp Regulator and one will be a four amp will be a three amp, so you'll be able to get like different Levels of output based on like the part number, but it won't be like a sub part number I'll actually be a totally new part number. So what I mean is like if yours if you know, you're speccing a a When ti makes this boost converter, right? they make a boost converter and Some are just gonna make it through the process and be able to like handle four amps Some are gonna end up three amps and we're handle to handle two and then they'll bend those and they'll separate them Or you know, however, they decide the process so you can get a two amp version of three amp version of four amp version So this is actually also in the the power boost So the power boost 500 and the 1000 actually use if you look closely To here these actually use almost the same exact layout the 500 and the 1000 but the chip is the same package as well But this is the TPS 61 Oh 90 This is TPS 61 oh 90 with a two amp switch and the power boost 1000 is the TPS Sorry This is the TPS 61 30 so the TPS 61 30 is the one that has four amp internal stick switch The TPS 61 90 has the the two amp switch So the smaller number has the more current that's that's how it goes sometimes doesn't mean anything Okay, so the upshot is is that if you're trying to find a regulator a boost converter or something from ti and you can't find your exact part You might be able to go up and down in either accuracy or current output or like Voltage input limit and find something that has almost the exact same capabilities, but like a slightly different Specification so If we go to Let's see was the TPS 31 73 101 the DBVT is you know a sub part as it is a Subpart number that usually specifies the temperature the packaging and the The Reeling like how big the real is so we can ignore that so this is yes, this is part of a family there's the 73 101 which is you know the specific component and then This one has adjustable output and there's also the family TPS 731 and this is you can see this is like doesn't have the full part number That's because it's a it's a family of regulators including Ones with fixed voltage output. So the 101 is the adjustable, but then there's like The 73 118 which is 1.8 73 15 0 which is a 5.0. Well, so like there's a wide range of them But you're gonna have the same functionality like that fold back over current protection that they wanted is going to be In every part of that family So I thought what's interesting is that if you look they have you know a range of very similar boards with similar performance And probably the same kind of functionality. So let's look at Let's look at Find other Yeah, let's let's do find other regulars. Let's see if they have the fold back protection as one of the Output capability. So this is 7313 V in men Let's not have it a maximum output So this is I'm searching for the 73101 and then I'm just kind of deleting things that aren't as important to me So no V and the V and max can be I Guess this is fine. This is fine. We can say maybe the noise is not as important I Don't care about fixed output because I want adjustable output. Let's remove the V and men so it can be a wider range and V and max has be at least five volts V out max. Yeah, five volts. That's fine and then the minimum as well, okay, so It has about 13 different parts and you can see that this is that 73101 It's still here. Oh wait, we wanted to find the Fold back see if this is in here. She don't remember if this is in here. Okay. Here you go fold back over current protection Okay, so here's the ones that have that fold back protection and have at least You know, maybe the same amount of current so there's the 731 and There is the 732 and if you look and compare between the two The 731 732 both have the same list of functionality. This one's a little bit more expensive This one looks like it has the same number fixed outputs as adjustable outputs and this one is 250 milliamp output instead of 150 so that makes sense the 731 is 150 732 is 250 so If we look at the 732 now again, you know, if I had more time I'd go through the entire data sheet and I'd compare it one by one To see if the quiescent current is what I need if the dropouts what I need But it could be that like you could just use this instead of the 731 just use the 732 that the next step up So if you go to did you key? I think TPS 73 732 oh one because the oh one is the adjustable version and Let's also only show in stock because we only care about if they haven't stopped us. We're looking for So it looks like there's two versions. So for I don't know what DCQ is I don't know if this is this looks like it's a a different package although That's weird because I know this came another package, but they do have this thought 23.5 in it. It's available through your marketplace. It's through a third-party Rochester electronics which sells, you know It's it's great market. It's not the official distributor, but they do sell You know distribution quality parts those are about 3,000 available Only thing is is the price is kind of high, you know, it's gonna be two dollars instead of What you would normally budget for it, which I believe in the Search set a budget of about 50 cents. So I mean the question is, you know, is the extra dollar 50 Price worth it to get this board out there on the road Another option that I would do is if you don't want to go with the TPS 732 oh one, there's also the 734 oh one, which is the next step up in linear regulators And this one let's also only show in stock and This one oh this one Yeah, you can get These a little bit cheaper They go down to like a dollar or 73 cents, but they don't have a lot in stock and they're not getting them talked over So never mind. I thought these that they actually had some of these in stock But if you can find through another distributor You could also change to the W son version package I guess they come come in both soft 23 and W son, but I think best bet right now You know, it's it's annoying to pay more for It's annoying to pay more for a Regulator when you know, you normally you'd speck of 50 cents and you're you know, you're paid two dollars on the other hand It's two dollars not five dollars and if you really want to get out the door This might be more important and maybe next time. We'll also look at maybe how to find other regulators with fold-back Current protection because again, it's it's a unique thing that you're gonna have to know how to find But this is a good alternative, you know If you really want to get your board out and you don't mind spending a little bit more I think this would probably be a drop in alternative and of course, you know It has more current capability so you can even connect more stuff to the output of your board All right, that's good church