TPS7A20: low iq high PSRR

Jeff YANG

Mastermind 7515 points

Part Number: TPS7A20

Tool/software:

Hi,

May I know there have alternative LDO for below Anasemi VRH series?

Iout = 250mA Vout = 3.3V, low dropout, PSRR~70DB, under 25uA

We found the closest is TPS7A20 series but

VRH3001NTX.pdf

8 months ago

0 Kyle Van Renterghem 8 months ago

TI__Genius 14245 points

Hi Jeff,

The TPS7A20 seems like an excellent choice for this type of application, it can supply 300mA current and only requires 13uA of Iq while maintaining great PSRR.

Below is the PSRR of the TPS7A20 with the most similar conditions that we could use to compare to the Anasemi device. As you can see the TPS7A20 has higher PSRR for most frequencies and critically it provides great PSRR even at high frequencies where most switching or other noise occurs.

0 Jeff YANG 8 months ago in reply to Kyle Van Renterghem

Mastermind 7515 points

Hi Kyle,

Sorry, I'm not finished my post but sent it out.

We found the closest is TPS7A20 series but it may fail on some ESD test.

We want find the part similar as TPS7A20 also have PSRR~70DB, under 25uA LDO to let customer doing the ESD test.

Thanks!

0 Kyle Van Renterghem 8 months ago in reply to Jeff YANG

TI__Genius 14245 points

Hi Jeff,

What is the ESD requirement? I'm surprised to hear a concern with TPS7A20 ESD as it supports significantly higher ESD than many modern devices and more than JEDEC recommends also it is used by several thousand different customers without issue.

Power management

Power management forum

TPS7A20: low iq high PSRR