Inicio Gestión de la energía Supervisor & reset ICs
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Gestión de la energía
Supervisor & reset ICs

TPS3808-EP

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Circuito de supervisión de retardo programable, corriente quiescente baja, producto mejorado

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TPS3808-EP

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Detalles del producto

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 0.405, 3.07 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) 1.25, 20, 300, 1200 Supply voltage (min) (V) 1.7, 1.8 Supply voltage (max) (V) 6.5 Rating HiRel Enhanced Product Watchdog timer WDI (s) None Operating temperature range (°C) -55 to 125
Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 0.405, 3.07 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) 1.25, 20, 300, 1200 Supply voltage (min) (V) 1.7, 1.8 Supply voltage (max) (V) 6.5 Rating HiRel Enhanced Product Watchdog timer WDI (s) None Operating temperature range (°C) -55 to 125
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Controlled Baseline
    • One Assembly Site
    • One Test Site
    • One Fabrication Site
  • Extended Temperature Performance of
    –55°C to 125°C
  • Enhanced Diminishing Manufacturing Sources
    (DMS) Support
  • Enhanced Product-Change Notification
  • Qualification Pedigree1
  • Power-On Reset Generator With Adjustable
    Delay Time: 1.25 ms to 10 s
  • Very Low Quiescent Current: 2.4 µA Typical
  • High Threshold Accuracy: 0.5% Typical
  • Fixed Threshold Voltages for Standard Voltage
    Rails From 0.9 V to 5 V and Adjustable Voltage
    Down to 0.4 V Are Available
  • Manual Reset (MR) Input
  • Open-Drain RESET Output
  • Temperature Range: –55°C to 125°C
  • Small SOT-23 Package
  • Controlled Baseline
    • One Assembly Site
    • One Test Site
    • One Fabrication Site
  • Extended Temperature Performance of
    –55°C to 125°C
  • Enhanced Diminishing Manufacturing Sources
    (DMS) Support
  • Enhanced Product-Change Notification
  • Qualification Pedigree1
  • Power-On Reset Generator With Adjustable
    Delay Time: 1.25 ms to 10 s
  • Very Low Quiescent Current: 2.4 µA Typical
  • High Threshold Accuracy: 0.5% Typical
  • Fixed Threshold Voltages for Standard Voltage
    Rails From 0.9 V to 5 V and Adjustable Voltage
    Down to 0.4 V Are Available
  • Manual Reset (MR) Input
  • Open-Drain RESET Output
  • Temperature Range: –55°C to 125°C
  • Small SOT-23 Package

The TPS3808xxx family of microprocessor supervisory circuits monitors system voltages from 0.4 V to 5.0 V, 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 TPS3808 uses a precision reference to achieve 0.5% threshold accuracy for VIT ≤ 3.3 V. The reset delay time can be set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor. The TPS3808 has a very low typical quiescent current of 2.4 µA, so it is well-suited to battery-powered applications. It is available in a small SOT-23 package, and is fully specified over a temperature range of –55°C to +125°C (TJ).

The TPS3808xxx family of microprocessor supervisory circuits monitors system voltages from 0.4 V to 5.0 V, 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 TPS3808 uses a precision reference to achieve 0.5% threshold accuracy for VIT ≤ 3.3 V. The reset delay time can be set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor. The TPS3808 has a very low typical quiescent current of 2.4 µA, so it is well-suited to battery-powered applications. It is available in a small SOT-23 package, and is fully specified over a temperature range of –55°C to +125°C (TJ).
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Documentación técnica

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Tipo Título Fecha
* Data sheet TPS3808-EP Low Quiescent Current, Programmable Delay Supervisory Circuit datasheet (Rev. D) PDF | HTML 24 dic 2014
* Radiation & reliability report TPS3808-EP Reliability Report (Rev. A) 18 jun 2018
* VID TPS3808-EP VID V6208607 21 jun 2016
Application note Optimizing Resistor Dividers at a Comparator (Rev. B) PDF | HTML 30 abr 2021
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 jun 2019
Application note Adding Hysteresis to Supply Voltage Supervisor 19 ago 2009

Diseño y desarrollo

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