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LM5145 Datasheet(PDF) 45 Page - Texas Instruments |
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LM5145 Datasheet(HTML) 45 Page - Texas Instruments |
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45 / 73 page  (43) 8.2.1.2.9 Compensation Components Choose compensation components for a stable control loop using the procedure outlined as follows. 1. Based on the target loop crossover frequency, fC, of 60kHz, use Equation 44 to calculate RCOMP1, assuming an effective output capacitance of 128µF. Select RCOMP1 equal to 10kΩ. (44) 2. Calculate CCOMP1 to create a zero at the higher of (1) one tenth of the crossover frequency, or (2) the load pole. Select a capacitor value for CCOMP1 of 3.3nF. In general, set the time constant of RCOMP1 and CCOMP1 at approximately 25µs to maintain a fast settling time of the output voltage following a load transient. (45) 3. Calculate CHF1 to create a pole at the lower of the ESR zero frequency or at half switching frequency (to attenuate high-frequency noise). Select a capacitor value for CHF1 of 68pF. (46) Note Set a high loop crossover frequency with high RCOMP and low CCOMP values to improve the large- signal response when recovering from operation in dropout. www.ti.com LM25137 SNVSCU4 – OCTOBER 2025 Copyright © 2025 Texas Instruments Incorporated Submit Document Feedback 45 Product Folder Links: LM25137 |
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