TPS62090-Q1: Whether we could change the RFB to decrease Iq

Amelie Zheng

Genius 10865 points

Part Number: TPS62090-Q1

Hi Team,

May I ask whether customer could change 100k to 1M so as to decrease current when in sleep mode?

Will it have bad impact?

over 3 years ago

0 Tanvee over 3 years ago

TI__Genius 13460 points

Hi Amelie,

Normally DC/DC converter requires the sum od resistor divider up to 1Mohm. The feedback current should flow resistor mini 5uA. From the current value, it looks quite lower than the minimum value.

The feedback divider effect on the device performance is well explained in this app note: https://www.ti.com/lit/an/slyt469/slyt469.pdf

Best regards,

Tanvee

Power management

Power management forum

TPS62090-Q1: Whether we could change the RFB to decrease Iq