• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 351 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS2596: ON-Resistance value by IOUT

Dice-K
Mastermind 7540 points
Part Number: TPS2596

Hi support team,

The ON-Resistance value is written on SLVSET8A.
- RON, Electrical Characteristics, Page-7
- Figure-7, Page-10

Only data with IOUT = 0.2A.
Does the ON-Resistance depend on VIN and TJ and not on IOUT?

Are the RON values with IOUT of 0.125A to 2A equivalent?
The input voltage is 5V.

Regards,
Dice-K

  • 0
    TI__Guru 57737 points

    Hi Dice,

    Ron varies with VIN and Junction temperature. From figure 7 of datasheet you can observe that, 

    • For Vin < 4V Ron reduces with increase in Vin. For Vin > 4V the Ron is almost independent of Vin.
    • As junction temperature increases the Ron increases. 

    There is no much variation of Ron with load current. You can  consider it as constant across load current. 

    For your application , 5V and load current = 0.125 A - 2A you can consider the Max Ron to be

    • = 115.3 mohms for Tj = -40C to 85C
    • = 131 mohms for Tj = -40C to 125C