I'm looking for a buck converter in a SOIC-8 package which requires a small inductor (preferably ≤10µH) which can convert 6V-16V to 5V @ 1A. Unfortunately the package must be a SOIC package, because the person I'm designing for requires the SOIC package to be easy to place and solder. At the moment I've drawn a blank: all the high speed buck converters I have found only have a 6V or so maximum input voltage or they come in strange packages which are difficult to hand solder.
closed as off-topic by Olin Lathrop, Bence Kaulics, Daniel Grillo, Sparky256, pipe Jul 31 '16 at 22:02
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Questions seeking recommendations for specific products or places to purchase them are off-topic as they are rarely useful to others and quickly obsolete. Instead, describe your situation and the specific problem you're trying to solve." – Olin Lathrop, Bence Kaulics, Daniel Grillo, Sparky256, pipe
Maybe something like the LT1765-5.0 or the TPS54232? Both are SOIC-8, plenty of power and high frequent which makes for very small inductors. If you get regulators that only switch at 250kHz or even slower, you get rather large inductors (>47uH) for these applications. It also depends on how much current you are typically using , so read the datasheets properly.
Please note that the board design is very crucial if you're working with any type of switching regulator, but especially these regulators that switch at 1MHz or so.
What I also recommended to do with these regulators is to calculate the maximum power dissipation. I haven't checked the datasheets extensively so I don't know how much the SOIC-8 will have to dissipate. Usually a SOIC-8 package is terrible, and if the chip is available in something like a SOT263 (which cools much better - especially with planes) you will not be able to completely use the chip specs in that package (but it will still work to some extent).
Allegro A4447. Wide supply range and also pretty cheap. It has a thermal pad, but at low outputs you may not need to solder it, so can treat it as a normal SO8. Only possible issue is input voltage range at the low end - won't quite go down to 6v
Texas Instruments TPS 5410, although 68 uH inductor is recommended.
Linear Technology LT1172CS8 appears too meet your criteria:
- Input voltage range: 3 V to 60 V
- Internal 1.25 A switch
- Applications: Logic supply 5V, etc.
- 8-SOIC package
- 100 kHz
- AN19 - LT1070 Design Manual
- AN30 - Switching Regulator Circuit Collection
Is the 20SOIC package too big? ( LT1176CSW and LT1176CSW-5 )
Is it possible to tweak one of the "Black regulator designs" to meet your criteria? If you can't find a monolithic integrated solution, then you have no other choice but to build it up from discrete components like this.
May I ask what in the world you are doing that needs 5 W of power, but is so space-sensitive that a TO-263 package is "too big"? In my experience, tiny devices are typically micro-power, and devices that require more than 4 W generally have plenty of room for the TO220-5 through-hole or TO-263 packages that many switching regulators use.
Semtech SC4524A looks a good fit 3-28V in, 2A out, SO8 (Thermal pad), up to 2MHz for small inductors/caps. Vary cheap.
Check MP1584 out. This chip has a maximum frequency of 1.5MHZ and can deliver up to 3mA current. A friend of mine uses a module sold from china containing this chip to charge his tablet. The datasheet contains the inductor specifications and I can see all of them are less than 30uH.