LM27762 question

Frank Xiao

Genius 12055 points

Other Parts Discussed in Thread: LM27762

Hi team,

My customer wants to use the chip to change 2v-3.6v to 3.3v 200mA output. You know the chip has two output, one is positive and one is negative. If the customer only need the positive voltage. Do you have some suggestions about the negative voltage pins? float ?

Thank you.

Frank

over 8 years ago

0 Juha Karttunen over 8 years ago

TI__Intellectual 1120 points

Hi Frank,

Both outputs have their own enable pins, so customer can leave negative output unconnected and tie EN- to ground to disable it.

Please notice that the LM27762 cannot boost input voltage to produce higher output voltage, so in this case only input voltages higher than 3.4V would be possible, as there has to be enough headroom for LDO to operate. You can search more suitable alternative here:

www.ti.com/.../boost-charge-pump-inductorless-products.page

Regards,
Juha

Power management

Power management forum

LM27762 question