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TPS3780DDRYT Datasheet(PDF) 8 Page - Texas Instruments

 No. de Pieza. TPS3780DDRYT Descripción Low-Power, Dual-Voltage Detector in Small SON Package Descarga 17 Pages Scroll/Zoom 100% Fabricante TI [Texas Instruments] Página de inicio http://www.ti.com Logo

TPS3780DDRYT Datasheet(HTML) 8 Page - Texas Instruments

 8 / 17 page MON(no UV)IT+R1V= 1 +× VR2§·¨¸©¹MON(UV)ITR1V= 1 +× VR2§·¨¸©¹SENSE1SENSE2R1_V2V2R2_V1R2_V2R1_V1V1VCCGNDOUT1OUT2TPS3780VCCTo SystemResetTPS3779TPS3780SBVS216B – SEPTEMBER 2012 – REVISED MAY 2013www.ti.comThe TPS3779 and TPS3780 also have adjustable sense inputs that can be configured to monitor voltages usingexternal resistor divider, as shown in Figure 14.Figure 14. Application DiagramThe resistor divider values and target threshold voltage can be calculated by using Equation 1 and Equation 2 todetermine VMON(no UV) and VMON(UV), respectively.(1)(2)Where:•R1 and R2 are the resistor values for the resistor divider on the SENSEx pins.•VMON(UV) is the target voltage at which an undervoltage condition is detected.•VMON(no UV) is the target voltage at which an undervoltage condition is removed when VMON rises.Choose RTOTAL ( = R1 + R2) so that the current through the divider is approximately 100 times higher than theinput current at the SENSEx pins. The resistors can have high values to minimize current consumption as aresult of low input bias current without adding significant error to the resistive divider. For details on sizing inputresistors, refer to Application Report SLVA450, Optimizing Resistor Dividers at a Comparator Input, available fordownload from www.ti.com.8Submit Documentation FeedbackCopyright © 2012–2013, Texas Instruments IncorporatedProduct Folder Links: TPS3779 TPS3780