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MIC2007 датащи(PDF) 14 Page - Micrel Semiconductor |
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MIC2007 датащи(HTML) 14 Page - Micrel Semiconductor |
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14 / 17 page ![]() Micrel MIC2007/MIC2017 October 2005 14 M9999-102805 Figure 4. IOUT in Current Limiting for VIN - VOUT ≤1V Figure 5. IOUT in Current Limiting for VIN - VOUT >1V This folding back of ILIMIT can be generalized by plotting ILIMIT as a function of VOUT, as shown below. The slope of VOUT between IOUT = 0 and IOUT = ILIMIT (where ILIMIT = 1) is determined by RON of MIC2007/2017 and ILIMIT. 0 0.2 0.4 0.6 0.8 1.0 1.2 01 23 456 OUTPUT VOLTAGE (V) Normalized Output Current vs. Output Voltage (5V) Figure 6. 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT VOLTAGE (V) Normalized Output Current vs. Output Voltage (2.5V) Figure 7. CSLEW The CSLEW input is provided to increase control of the output voltage ramp at turn-on. This input allows designers the option of decreasing the output’s slew rate (slowing the voltage rise) by adding an external capacitance between the pin, CSLEW, and VIN. This capacitance slows the rate at which the pass FET gate voltage increases and thus, slows both the response to an Enable command as well as VOUT’s ascent to its final value. Figure 8 illustrates effect of CSLEW on turn-ON delay and output rise time. |
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