LM53602-Q1: Input Voltage Threshold for Mode Transition at Light Load

Shinichi Yokota

Part Number: LM53602-Q1

Hello,

Figure 13 of the data sheet (SNVSA42B) shows an input transition voltage from PWM to PFM in AUTO mode at no load, but what's the variation (Min and Max) of this threshold?

Best regards,
Shinichi Yokota

over 4 years ago

0 Samuel Jaffe over 4 years ago

TI__Mastermind 25590 points

Yokota-san,

I will look for this data. I will reply in a day or two.

-Sam

0 Samuel Jaffe over 4 years ago in reply to Samuel Jaffe

TI__Mastermind 25590 points

Yokota-san,

I'm sorry to say we do not have this data. We only have one characteristic curve. We do not have statistical data for min/max.

-Sam

0 Shinichi Yokota over 4 years ago in reply to Samuel Jaffe

TI__Genius 9715 points

Sam-san,

Is it possible to give us rough estimation of the Max/Min values from design files such as schematic? If the V_IN threshold is determined by a resistor divider, for example, an error of the resistance ratio would have a major impact on the V_IN threshold variation. Rough number is OK for us. Could you look into this again?

Please let me ask one more question. If the input voltage drops in AUTO mode when a device is operating in PFM, will the device switch back to PWM again? If yes, what's the input threshold?

Best regards,
Shinichi Yokota