how to get 5v 1.5amp dc output from 6v 4.5ah dc battery?

[LKSH]

i had read similar threads but need to confirm that i want to charge my mobile which uses 5v 1.5amp charger and the problem is current rating. can i use 7805 voltage regulator and get 5v 1.5amp current output without burning my mobile?
Is their any other IC for regulating 6v 4.5ah battery to 5v 1.5amp?
thanks in advance

 

[jiripolivka]

i had read similar threads but need to confirm that i want to charge my mobile which uses 5v 1.5amp charger and the problem is current rating. can i use 7805 voltage regulator and get 5v 1.5amp current output without burning my mobile?
Is their any other IC for regulating 6v 4.5ah battery to 5v 1.5amp?
thanks in advance

The 7805 is NOT suitable as it requires the INPUT voltage to be > 7.5V. You can use a large 5 VZener and a series resistor (I doubt that your cell phone needs 1.5 A at 5V) but you can find IC regulators marked "low drop"; some can work with 6 V input and give 5 V output at 1.5 A.
There are also switching regulators available as ICs; they need a special inductor to operate.

To start, I would connect a DVM to check the actual maximum current your cell phone draws from its 5 V power supply. Then use the nominal current to design the voltage regulator.

 

[tpetar]

This thread is duplicated, and its located also here:

https://www.edaboard.com/threads/285216/

 

[nikhilt007]

just use one diode(1n4007) infront of the battery out put that will drop .6v then you will get 5.4v and then use a diode that is having forward voltage near to .4v especially germanium diode

and if you want aconstant current use any transistor for switching that is having 1.5a current rating

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just use one diode(1n4007) infront of the battery out put that will drop .6v then you will get 5.4v and then use a diode that is having forward voltage near to .4v especially germanium diode

and if you want aconstant current use any transistor for switching that is having 1.5a current rating