LM3880 - power up sequence in case of Vin=12V

Hirotaka Matsumoto

Other Parts Discussed in Thread: LM3880

Hi all

Would you mind if we ask sequence?
Our customer would like to make power up sequence in case of Vin=12V.
There is no Power Sequencer which is avilable for Vin=12V.
LM3880 is not avilable for Vin=12V.(MAX Vin=5.5V)

Without using LDO and DCDC for buck down voltage, if you have some advice, could you let us know?

Kind regards,

Hirotaka Matsumoto

over 8 years ago

0 Hirotaka Matsumoto over 8 years ago

Guru 27585 points

Hi team

We are sorry to rush you, however could you give us the reply?

Kind regards,

Hirotaka Matsumoto

0 Kaisar Ali over 8 years ago

TI__Intellectual 2010 points

HI Hirotake,

Unfortunately TI doesn't have any analog sequencer to support Vcc more than 6.5V (UCC devices included). They have to step down the voltage using a DC-DC step down or an LDO. Power up and down sequencing is used to control down stream electronics. Normally lot less than 12V rails are used for EN and PGOOD signals. You have to propose a PMIC solution if they don't want to step down the voltage.

Hope this helps.

0 Michael_DeSando over 8 years ago

TI__Genius 12630 points

Hirotaka Matsumoto,

If you can provide additional information about the application or system, we might be able to help you find another solution. Do you have any schematic or other useful information?

Hope we can help,

Michael

Power management

Power management forum

LM3880 - power up sequence in case of Vin=12V