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TPS3808G01QDBVRQ1 Fiches technique(PDF) 9 Page - Texas Instruments |
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TPS3808G01QDBVRQ1 Fiches technique(HTML) 9 Page - Texas Instruments |
9 / 25 page 100 10 1 0 5 10 15 20 30 35 45 25 Overdrive (%V IT) 50 40 RESET OCCURS ABOVE THE CURVE VDD VIT Overdrive Voltage Transient Duration TPS3808G01-Q1, TPS3808G12-Q1, TPS3808G125-Q1, TPS3808G15-Q1 TPS3808G18-Q1, TPS3808G30-Q1, TPS3808G33-Q1, TPS3808G50-Q1 www.ti.com SBVS085I – JANUARY 2007 – REVISED JUNE 2015 8.3 Feature Description 8.3.1 Immunity to SENSE Pin Voltage Transients The TPS3808Gxx-Q1 is relatively immune to short negative transients on the SENSE pin. Sensitivity to transients is dependent on threshold overdrive, as shown in the Maximum Transient Duration at Sense vs Sense Threshold Overdrive Voltage graph (Figure 9). This graph shows the duration that the transient is below VIT compared to the magnitude of the voltage drop below VIT, or overdrive voltage. The overdrive voltage is expressed as a percentage of the VIT threshold value. Any combination of transient duration and overdrive voltage that lies above the curve results in RESET being asserted low. Any transient that lies below the curve is ignored by the device. Figure 8. Threshold Overdrive Voltage Figure 9. Maximum Transient Duration at Sense vs Sense Threshold Overdrive Voltage 8.3.2 SENSE Input The SENSE input provides a terminal at which any system voltage can be monitored. If the voltage on this pin drops below VIT, RESET is asserted low. The comparator has a built-in hysteresis to ensure smooth RESET assertions and deassertions. It is good analog design practice to put a 1-nF to 10-nF bypass capacitor on the SENSE input to reduce sensitivity to transients and layout parasitics. Copyright © 2007–2015, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: TPS3808G01-Q1 TPS3808G12-Q1 TPS3808G125-Q1 TPS3808G15-Q1 TPS3808G18-Q1 TPS3808G30-Q1 TPS3808G33-Q1 TPS3808G50-Q1 |
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