Hi, I want to use the TPS61032 design to system, but the D/S show total accuracy is -3% ~ 3% and VFB for TPS61030, it's confuse for me. I want to know the TPS61032 output voltage accuracy. If the accuracy out 2%, could help recommend the suitable solution for accuracy achieve 2%?
The total accuracy of the TPS6103x is +/- 3%. Note that the fixed versions of the IC include the voltage divider resistors which are an additional source of error beyond the variation in the FB voltage.
The +/-3% is an absolute worst case based on statistical analysis of the IC variation, temperature variation, etc. A large portion of the accuracy is temperaturerelated. If you can ensure that your operating temperature range will be significantly less than the -40 to +125 C spec, then you will get better accuracy than +/-3%. A power supply with total accuracy of +/-2% over all conditions will be very hard to achieve.
Can you comment on how the 3% total accuracy, 2% Vfb and 0.6% line/load regulation specs for the TPS610x are related? Does the 3% total include the line/load number?
Do we have an idea what the accuracy will be if constrained to a commercial temp range of 0-70degC?
The 3% does include line and load reg but not external FB resistors for the adjustable device version.
There is no data over a reduced temperature range but as you can see, the variation of the feedback voltage is the primary accuracy limitation. This variation is mainly due to temperature. So, it will be tighter over your reduced range.
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