LM2750 Input Short Circuit

Jeff H

Other Parts Discussed in Thread: LM2750

I see from the datasheet that the LM2750 has output short circuit protection, but is there input short circuit protection as well?

over 9 years ago

0 Jeff H over 9 years ago

Prodigy 30 points

Also, is there a way to set the input and output capacitors so that I_OUT ~= I_IN, with the voltage still doubled and V_IN = 3V?

0 Angelos Tsiros over 9 years ago

TI__Intellectual 2140 points

No damage will occur to the LM2750 regadless of how low the input voltage drops.

0 Angelos Tsiros over 9 years ago in reply to Jeff H

TI__Intellectual 2140 points

The LM2750 is a doubler that subsequently regulates the output voltage down to 5V. With VIN = 3V, VOUT = 5V and max efficiency of 87%, using IIN = (IOU x VOUT)/(VIN x eff) you get IIN = 1.9 x IOUT. Choosing low esr capacitors will help reach the max efficiency of 87%.

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LM2750 Input Short Circuit