Inicio Administración de potencia Supervisor & reset ICs Circuitos integrados de restablecimiento y vigilancia
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Administración de potencia
Supervisor & reset ICs
Circuitos integrados de restablecimiento y vigilancia

TPS3818G25

ACTIVO

Supervisor de retardo programable preciso y corriente quiescente baja

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TPS3818G25

ACTIVO
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Detalles del producto

Rating Catalog Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 2.33 Features Manual reset capable, Reset time delay, Separate VDD & sense, Undervoltage monitor only Reset threshold accuracy (%) 0.5 Iq (typ) (mA) 0.0024 Output driver type/reset output Active-low, Open-drain Time delay (ms) 20, 300 Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
Rating Catalog Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 2.33 Features Manual reset capable, Reset time delay, Separate VDD & sense, Undervoltage monitor only Reset threshold accuracy (%) 0.5 Iq (typ) (mA) 0.0024 Output driver type/reset output Active-low, Open-drain Time delay (ms) 20, 300 Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
WSON (DRV) 6 4 mm² (2 mm × 2 mm)
  • Power-On Reset Generator with Adjustable Delay Time: 1.25ms to 10s
  • Very Low Quiescent Current: 2.4µA typ
  • High Threshold Accuracy: 0.5% typ
  • Fixed Threshold Voltages for Standard Voltage Rails from 0.9V to 5V and Adjustable Voltage Down to 0.4V Are Available
  • Manual Reset (MR) Input
  • Open-Drain RESET Output
  • Temperature Range: -40°C to +125°C
  • Small SOT23 and 2mm × 2mm QFN Packages
  • APPLICATIONS
    • DSP or Microcontroller Applications
    • Notebook/Desktop Computers
    • PDAs/Hand-Held Products
    • Portable/Battery-Powered Products
    • FPGA/ASIC Applications

PowerPAD Is a trademark of Texas Instruments
All other trademarks are the property of their respective owners
  • Power-On Reset Generator with Adjustable Delay Time: 1.25ms to 10s
  • Very Low Quiescent Current: 2.4µA typ
  • High Threshold Accuracy: 0.5% typ
  • Fixed Threshold Voltages for Standard Voltage Rails from 0.9V to 5V and Adjustable Voltage Down to 0.4V Are Available
  • Manual Reset (MR) Input
  • Open-Drain RESET Output
  • Temperature Range: -40°C to +125°C
  • Small SOT23 and 2mm × 2mm QFN Packages
  • APPLICATIONS
    • DSP or Microcontroller Applications
    • Notebook/Desktop Computers
    • PDAs/Hand-Held Products
    • Portable/Battery-Powered Products
    • FPGA/ASIC Applications

PowerPAD Is a trademark of Texas Instruments
All other trademarks are the property of their respective owners

The TPS3818xxx family of microprocessor supervisory circuits monitor system voltages from 0.4V to 5.0V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output 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 CT pin, 300ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CT pin 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-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output 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 CT pin, 300ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25ms and 10s by connecting the CT pin 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).
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos Low Quiescent Current, Accurate Programmable-Delay Supervisory Circuit datasheet (Rev. A) 9/08/2008
Nota sobre la aplicación Optimizing Resistor Dividers at a Comparator (Rev. B) PDF | HTML 30/04/2021
Libro electrónico Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28/06/2019

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