TPS3818G25 Series

low quiescent current, Accurate programmable-delay supervisor

Catalog

low quiescent current, Accurate programmable-delay supervisor

Part	Reset Timeout [Min]	Type	Voltage - Threshold	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Output	Reset	Number of Voltages Monitored	Mounting Type
Texas Instruments TPS3818G25DRVT	180 ms	Simple Reset/Power-On Reset	2.33 V	-40 °C	125 ¯C	6-WSON (2x2)	Open Drain or Open Collector	Active Low	1	Surface Mount
Texas Instruments TPS3818G25DRVR	180 ms	Simple Reset/Power-On Reset	2.33 V	-40 °C	125 ¯C	6-WSON (2x2)	Open Drain or Open Collector	Active Low	1	Surface Mount

Catalog

low quiescent current, Accurate programmable-delay supervisor

Key Features

• Power-On Reset Generator with Adjustable Delay Time: 1.25ms to 10sVery Low Quiescent Current: 2.4µA typHigh Threshold Accuracy: 0.5% typFixed Threshold Voltages for Standard Voltage Rails from 0.9V to 5V and Adjustable Voltage Down to 0.4V Are AvailableManual Reset (MR) InputOpen-DrainRESETOutputTemperature Range: -40°C to +125°CSmall SOT23 and 2mm × 2mm QFN PackagesAPPLICATIONSDSP or Microcontroller ApplicationsNotebook/Desktop ComputersPDAs/Hand-Held ProductsPortable/Battery-Powered ProductsFPGA/ASIC ApplicationsPowerPAD Is a trademark of Texas InstrumentsAll other trademarks are the property of their respective ownersPower-On Reset Generator with Adjustable Delay Time: 1.25ms to 10sVery Low Quiescent Current: 2.4µA typHigh Threshold Accuracy: 0.5% typFixed Threshold Voltages for Standard Voltage Rails from 0.9V to 5V and Adjustable Voltage Down to 0.4V Are AvailableManual Reset (MR) InputOpen-DrainRESETOutputTemperature Range: -40°C to +125°CSmall SOT23 and 2mm × 2mm QFN PackagesAPPLICATIONSDSP or Microcontroller ApplicationsNotebook/Desktop ComputersPDAs/Hand-Held ProductsPortable/Battery-Powered ProductsFPGA/ASIC ApplicationsPowerPAD Is a trademark of Texas InstrumentsAll other trademarks are the property of their respective owners

Description

The TPS3818xxx family of microprocessor supervisory circuits monitor system voltages from 0.4V to 5.0V, asserting an open-drainRESETsignal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. TheRESEToutput remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3818 uses a precision reference to achieve 0.5% threshold accuracy for VIT≤ 3.3V. The reset delay time can be set to 20ms by disconnecting the CTpin, 300ms by connecting the CTpin to VDDusing a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CTpin to an external capacitor. When used with an external capacitor, the TPS3818xxx gives a more accurate delay time than the similar TPS3808xxx device. The TPS3818 has a very low typical quiescent current of 2.4µA so it is well-suited to battery-powered applications. It is available in either a small SOT23 and an ultra-small 2mm × 2mm QFN PowerPAD package, and is fully specified over a temperature range of -40°C to +125°C (TJ). The TPS3818xxx family of microprocessor supervisory circuits monitor system voltages from 0.4V to 5.0V, asserting an open-drainRESETsignal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. TheRESEToutput remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. The TPS3818 uses a precision reference to achieve 0.5% threshold accuracy for VIT≤ 3.3V. The reset delay time can be set to 20ms by disconnecting the CTpin, 300ms by connecting the CTpin to VDDusing a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CTpin to an external capacitor. When used with an external capacitor, the TPS3818xxx gives a more accurate delay time than the similar TPS3808xxx device. The TPS3818 has a very low typical quiescent current of 2.4µA so it is well-suited to battery-powered applications. It is available in either a small SOT23 and an ultra-small 2mm × 2mm QFN PowerPAD package, and is fully specified over a temperature range of -40°C to +125°C (TJ).