TPS61089: In case of VIN > Vout

Hirotaka Matsumoto

Part Number: TPS61089

Hi all

Would you mind if we ask TPS61089?

We would like to ask you the operation in case of VIN > Vout.
If VIN is more than Vout always, we assume that the operation will be as follows;
1. Minimum duty switches on
2. FB pin senses over Vout value
3. Switching operation stops
4. FB pin senses less than Vout
5. Repeating 1 to 4
Is our recognition correct?
If you have some advice, could you let us know?

Kind regards,

Hirotaka Matsumoto

over 7 years ago

0 Helen chen over 7 years ago

TI__Mastermind 40080 points

If Vin>Vo+Vf (Vf is the voltage drop of the upper side body diode), then TPS61089 will works in the pass through mode. both the low side and the high side FET off, only body diode conducts. what is the Vin, Vo in your application?

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TPS61089: In case of VIN > Vout