TLV62585: Vfb at low drop operation of TLV62585

takahiko yokota

Part Number: TLV62585
Other Parts Discussed in Thread: TPS62160

I have a question about Vfb of TLV62585.
Vfb is defined 588mV(min), 600mV(typ) and 612mV(max) at PWM mode, 2.5 V ≤ VIN ≤ 5.5 V, -40°C to 125°C in 6.5 Electrical Characteristics.
If this device operate low drop, may I understand that Vfb is same value above stated?
Or will it be out of conditions at low drop operation like TPS62160?

Best regards,

Yokota

over 4 years ago

0 Excel Regidor over 4 years ago

TI__Mastermind 29816 points

Hi Yokota-san,

What do you mean "device operate low drop"? Is it about the 100% duty cycle operation of the device?

Thanks to clarify.

Best regards,

Excel

0 takahiko yokota over 4 years ago in reply to Excel Regidor

Mastermind 7135 points

Hi Excel-san

I'm sorry for my lack explanation.

Yes, "device operate low drop" is 100% duty cycle operation.

Best regards,

Yokota

0 Excel Regidor over 4 years ago in reply to takahiko yokota

TI__Mastermind 29816 points

Hi Yokota-san,

Noted.

VFB is not guaranteed to be within the limits indicated in the datasheet when the device is in 100% duty cycle operation.

Just an example, if the Vout is initial regulating at 3.3V then suddenly Vin dropped to 3.0V, the device will then operate to 100% duty cycle mode which make the Vout to dropped to 3.0V (assuming no load condition) as well. It is expected that VFB will not be within +/- 2% tolerance as Vout already dropped by 10% from the set output voltage.

Best regards,

Excel

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TLV62585: Vfb at low drop operation of TLV62585