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LTM4676A Scheda tecnica(PDF) 48 Page - Linear Technology |
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LTM4676A Scheda tecnica(HTML) 48 Page - Linear Technology |
48 / 136 page LTM4676A 48 4676afa For more information www.linear.com/LTM4676A applicaTions inForMaTion Table 2. VOUTnCFG Pin Strapping Look-Up Table for the LTM4676A's Output Voltage, Coarse Setting (Not Applicable if MFR_CONFIG_ALL[6] = 1b) RVOUTn CFG* (kΩ) VOUTn (V) SETTING COARSE MFR_PWM_MODEn[1] BIT Open NVM NVM 32.4 See Table 3 See Table 3 22.6 3.3 0 18.0 3.1 0 15.4 2.9 0 12.7 2.7 0 10.7 2.5 0, if VTRIMn > 0mV 1, if VTRIMn ≤ 0mV 9.09 2.3 1 7.68 2.1 1 6.34 1.9 1 5.23 1.7 1 4.22 1.5 1 3.24 1.3 1 2.43 1.1 1 1.65 0.9 1 0.787 0.7 1 0 0.5 1 *RVOUTnCFG value indicated is nominal. Select RVOUTnCFG from a resistor vendor such that its value is always within 3% of the value indicated in the table. Take into account resistor initial tolerance, T.C.R. and resistor operating temperatures, soldering heat/IR reflow, and endurance of the resistor over its lifetime. Thermal shock/cycling, moisture (humidity) and other effects (depending on one’s specific application) could also affect RVOUTnCFG’s value over time. All such effects must be taken into account in order for resistor pin strapping to yield the expected result at every SVIN power-up and/or every execution of MFR_RESET or RESTORE_ USER_ALL, over the lifetime of one’s product. Table 3. VTRIMnCFG Pin Strapping Look-Up Table for the LTM4676A's Output Voltage, Fine Adjustment Setting (Not Applicable if MFR_CONFIG_ALL[6] = 1b) RVTRIMnCFG* (kΩ) VTRIM (mV) FINE ADJUSTMENT TO VOUTn SETTING WHEN RESPECTIVE RVOUTnCFG ≠ 32.4kΩ VOUTn OUTPUT VOLTAGE SETTING (V) WHEN VOUTnCFG PIN USES RCFG = 32.4kΩ MFR_PWM_ MODEn[1] BIT Open 0 NVM 0, if VOUT_OV_ FAULT_LIMITn > 2.75V 1, if VOUT_OV_ FAULT_LIMITn ≤ 2.75V 32.4 99 22.6 86.625 18.0 74.25 15.4 61.875 12.7 49.5 10.7 37.125 5.50 0 9.09 24.75 5.25 0 7.68 12.375 5.00 0 6.34 –12.375 4.75 0 5.23 –24.75 4.50 0 4.22 –37.125 4.25 0 3.24 –49.5 4.00 0 2.43 –61.875 3.75 0 1.65 –74.25 3.63 0 0.787 –86.625 3.50 0 0 –99 3.46 0 *RVTRIMnCFG value indicated is nominal. Select RVTRIMnCFG from a resistor vendor such that its value is always within 3% of the value indicated in the table. Take into account resistor initial tolerance, T.C.R. and resistor operating temperatures, soldering heat/IR reflow, and endurance of the resistor over its lifetime. Thermal shock/cycling, moisture (humidity) and other effects (depending on one’s specific application) could also affect RVTRIMnCFG’s value over time. All such effects must be taken into account in order for resistor pin strapping to yield the expected result at every SVIN power-up and/or every execution of MFR_RESET or RESTORE_ USER_ALL, over the lifetime of one’s product. |
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