TPS22913: TPS22913 application

user5781628

Intellectual 970 points

Part Number: TPS22913

Hi, TI team,

There is a project which uses TPS22913. The desing circuit is as below:

1. Due to the EN is low, although the 5VDD is ready, the 5VDD can't be built at the network of "5VOUT";

2. And then the EN_LDO is high, and the 3.3V is built at the network of "5VOUT";

3. SET EN to be high level, and the 5VDD will pass through TPS22913, and the 5VDD will be built at the network of "5VOUT";

Please help check the operation principle is right or wrong!!!

I found that there is a MOSFET QOD on the datasheet.

If the EN is low level, the VOUT pin will be pulled to ground or not?

If VOUT is pulled to ground, the TPS22913 will be burnt if VOUT is with external LDO as above. Right?

Thanks very much!

Eleven

over 4 years ago

0 Rakesh over 4 years ago

TI__Guru* 95551 points

Hi Chen,

Most of the folks are out due to holidays. We will get back by early next week.

BR, Rakesh

0 Shreyas Dmello over 4 years ago in reply to Rakesh

TI__Mastermind 32650 points

Hi Eleven,

TPS22913 has a QOD transistor which is active when the EN is low and the chip is powered. This means that there will be a 150Ohm path to GND when the device is OFF.

This will definitely affect your OR-ing output and thus using a device without a QOD is preferable here.

Power management

Power management forum

TPS22913: TPS22913 application