Low dropout 5v regulator (up to 800 mA)

Here is one that might suit you:

Would anyone suggest a IC that is a 5V, low dropout voltage regulator (regulating output from a rechargeable battery pack), up to 800 mA current.

thanks

LT1117 LT1118

On first sight, looks like just what I need!

thanks!

An attractive feature of the tps79650 family is the noise-filter pin in the fixed-voltage versions, which I've put to good use.

I just wish they were also available in TO-220 style packages. It's rather hard to get much heat out of the surface-mounting packages, even with many square inches of copper. One craves the good old heat-sink fins.

Winfield, something makes me confused, they say that maximum Vin is 6 volts? (input voltage). If so, then they would not work for my 6.7v (actual) battery pack.

I agree, I like TO-220 myself too.

LM2940 (5V version)

Yep, those are strickly low-voltage parts - I've used them for making 3.3V from 5V, or 1.8V from 3.3V, etc. For higher voltages, and for +5, etc., we use parts from the Linear Technology LT1084 and LT1085 family.

That's another reason why we use the LT1084 and LT1085 parts.

Win, right now in my DigiKey basket I have digikey item LM2940CT-5.0-ND. It seems to be all I want and has very low dropout at lower currents.

It is described here

I think that that's what I will buy, though it only goes to 1A, but that would be a good start for me.

I do use those, but I prefer the LT1084 and LT1085 because of their higher maximum current (for a better safety margin), and the much lower 0.75 and 0.9 C/W vs 4.0 C/W thermal resistance. 'Course at $6.50 vs $1.35, the NSC LM2940 is somewhat cheaper.

NSC does win the dropout-voltage contest, at 500mV vs 900mV at 1A load. That's because they have a high-current PNP vs LTC's Darlington NPN pass transistor. However, LTC wins the 2.5A dropout-voltage contest, at 1.1 to 1.2V vs awwwkk! And, LTC wins the high-current saturated-output ground-current draw, at an attractive 0.05mA vs an ugly 130mA. Gag me with a spoon!

A little progress report, I soldered solid copper wires to the little tab terminals of the battery pack, milled out the AC charger a little bit so that the copper wires do not obstruct inserting the battery pack, and ordered "chips". The wires are approximately 16 gauge, quite solid.