Hi，
When using TPS62130A, the conversion efficiency of my client is 20% different from that given in the manual. May I ask what causes this problem and how to improve and optimize it?
Detail：
1. The first way: input 5V, output 1.0V, the official website gives the conversion efficiency: 88.7%, the measured conversion efficiency: 68.48%
Test method: Remove the 0Ω of R20 and R21, connect the current probe in series, and use the oscilloscope to test the current value of the two positions: 146.71mA, 448.56mA, namely: η= (1.055 * 0.44856)/ (4.71 * 0.14671)= 68.48%.
2. The rest of the way is the same as the 1V0 conversion efficiency, such as:
The input is 4.71V, the output is 1.8V, the measured output current is 231mA, the measured conversion efficiency is 81.96%, and the value given by the official website is 91%.
The input is 4.71V, the output is 1.2V, the measured output current is 378mA, the measured conversion efficiency is 75.99%, and the value given on the official website is 90%.
3. Only 3.3V this way conversion efficiency is higher:
The input is 4.71V, the output is 3.3V, the measured output current is 207mA, the measured conversion efficiency is 96%, and the value given on the official website is 95%.
4. All of the above circuit device models are the same, as follows:
Cin_10uf----Murata: GRM188R61E106M
Cout_22uf----Taiyo yuden: LMK107BBJ226MA-T
L Inductance :2.2uH---- Wurth: 74438336022
