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TPS3818G25

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低静态电流、高精度可编程延迟监控器

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TPS3818G25

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产品详情

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 Supply voltage (min) (V) 1.7 Supply voltage (max) (V) 6.5 Rating Catalog Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
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 Supply voltage (min) (V) 1.7 Supply voltage (max) (V) 6.5 Rating Catalog Watchdog timer WDI (s) None Operating temperature range (°C) -40 to 125
WSON (DRV) 6 4 mm² 2 x 2
  • 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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* 数据表 Low Quiescent Current, Accurate Programmable-Delay Supervisory Circuit 数据表 (Rev. A) 2008年 8月 9日
应用手册 设计电压监控器的电阻分压器输入端时的 IQ与精度权衡因素 (Rev. B) PDF | HTML 英语版 (Rev.B) PDF | HTML 2021年 10月 25日

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