Maxim IC frustration - hard to find components

was: Maxim IC frustration - hard to find components

techman41973 @yahoo.com MULTI-POSTED:

...and why?

*-*-*-*-*-*-*-*-appear+*-proper-answer-*-*-*-given+much-easier-*-*-*-*-what's-going-on+*-frowned-on+*-correcting+*-polite-*-mention-*-*-*-*-*-*-*+*-*-_perfect_-*-*-*-*+*-Followup-To-*+*-*-*-too-lazy-*-*-*-*-*-appropriate-*+Just-because-*-*-*-*-*-*-*-*-does-not-mean-*-*-*-*-*-*+*-*-*-*-two-groups-*-*-aren't-*-different

Dear Sirs,

We do have the following stock :

MAX1555EZK ( EX-STOCK)

MAX1522ESA ( EX-STOCK) MAX1522EAP ( EX-STOCK) MAX1522EUT ( EX-STOCK)

MAX1724EZK33-T ( EX-STOCK) MAX1724EZK50-T ( EX-STOCK)

Would you pleased tell us the full part number and the total QTY request for confirmation ?

Thanks !

-- Patrick Cheung townt.com Address : 1805, Wu Sang House, 655 Nathan Road, Mongkok, Kowloon, Hong Kong Tel : +852-25055838 Fax : +852-25058121 E-mail : snipped-for-privacy@towntarget.com.hk Web-site :

or

???????: snipped-for-privacy@n13g2000cwa.googlegroups.com... I don't know why Maxim makes it so difficult for small companies to design with their components. I am developing a new consumer electronics product. Unfortunately, I planned to use 4 Maxim chips that are hard to find in small quantities (1-40). Standard distributors like Arrow, Mouser and Digikey don't cary them. These components are excellent matches for my design needs. Maxim offers some of their ICs for purchasing on their website, but not the ones listed below. Perhaps someone can recommend a broker or exchange website where rare Maxim components can be purchased at reasonable prices. I would love to find alternatives to these components if someone can offer some advice. National, Linear and Analog devices simply cant match the selection, sophistication and price of switching regulators and battery charging ICs. Please feel free to recommend other IC manuafacturers that specialize in these types of components.

DS2745 Low Cost I2C Battery Monitor (chosen for its ability to cumulatively measure voltage & current to estimate battery life, + its low cost, $1@1K)

MAX1555 Dual-Input, USB/AC Adapter, 1-Cell Li+ Battery Chargers (chosen for its ability to intelligently charge a 1-cell lithium from a wall adapter or USB port 5v rail, low cost .85@1K)

MAX1522 Simple SOT23 Boost Controllers (chosen for its high frequency operation - small inductor, only a few external components, low cost $1.07@1K)

MAX1724 1.5µA IQ, Step-Up DC-DC Converters in Thin SOT23-5 (chosen for its ultra low quiescent current, only needs a 10uh inductor, has built in FET, very few external components, low cost $1.45 @ 1K)

Dear Sirs,

We do have the following stock :

MAX1555EZK ( EX-STOCK)

MAX1522ESA ( EX-STOCK) MAX1522EAP ( EX-STOCK) MAX1522EUT ( EX-STOCK)

MAX1724EZK33-T ( EX-STOCK) MAX1724EZK50-T ( EX-STOCK)

Would you pleased tell us the full part number and the total QTY request for confirmation ?

Thanks !

-- Patrick Cheung townt.com Address : 1805, Wu Sang House, 655 Nathan Road, Mongkok, Kowloon, Hong Kong Tel : +852-25055838 Fax : +852-25058121 E-mail : snipped-for-privacy@towntarget.com.hk Web-site :

or

???????: snipped-for-privacy@n13g2000cwa.googlegroups.com... I don't know why Maxim makes it so difficult for small companies to design with their components. I am developing a new consumer electronics product. Unfortunately, I planned to use 4 Maxim chips that are hard to find in small quantities (1-40). Standard distributors like Arrow, Mouser and Digikey don't cary them. These components are excellent matches for my design needs. Maxim offers some of their ICs for purchasing on their website, but not the ones listed below. Perhaps someone can recommend a broker or exchange website where rare Maxim components can be purchased at reasonable prices. I would love to find alternatives to these components if someone can offer some advice. National, Linear and Analog devices simply cant match the selection, sophistication and price of switching regulators and battery charging ICs. Please feel free to recommend other IC manuafacturers that specialize in these types of components.

DS2745 Low Cost I2C Battery Monitor (chosen for its ability to cumulatively measure voltage & current to estimate battery life, + its low cost, $1@1K)

MAX1555 Dual-Input, USB/AC Adapter, 1-Cell Li+ Battery Chargers (chosen for its ability to intelligently charge a 1-cell lithium from a wall adapter or USB port 5v rail, low cost .85@1K)

MAX1522 Simple SOT23 Boost Controllers (chosen for its high frequency operation - small inductor, only a few external components, low cost $1.07@1K)

MAX1724 1.5µA IQ, Step-Up DC-DC Converters in Thin SOT23-5 (chosen for its ultra low quiescent current, only needs a 10uh inductor, has built in FET, very few external components, low cost $1.45 @ 1K)

8

Have you checked out their websites (not just the Digi-Key listing)? I don't know about National and Analog, but I can tell you with assurance that Linear Technology has many DC/DC converters (buck, boost and buck-boost, as well as chargers) for battery powered applications that not only match but surpass the performance of Maxim parts, in a smaller package and without the delivery headaches you mention. As for price, it depends on the part, but you can expect to pay more for better performance in a smaller package.

For example, to replace the MAX1724, check out the LTC3525. The LTC part is smaller, uses the same quantity and size of external components, and has much higher efficiency and better output regulation (conveniently not shown in the Maxim performance curves), while the output ripple is significantly lower. The LTC part also offers more sophisticated features such as output disconnect and the ability to regulate Vout even when Vin>Vout (a neat trick for a boost converter). Some other cool parts are the LTC3531 and the LTC3526, just to give two more examples. For buck converters and chargers (both linear and switching), the list of LTC parts you can choose from is so long I wouldn't know where to start. In my opinion, Maxim hasn't really come out with anything new in this arena for some time. (And - in case you're wondering - I'm not an LTC Marketing guy!)

What are your input, output, and load requirements?

Happy hunt> I don't know why Maxim makes it so difficult for small companies to