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TPS3808G18DBVT

1.8V voltage supervisor, 1.67V threshold, 0.5% accuracy, 2.4uA Iq, programmable delay, SOT-23-6

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Manufacturer Part：

TPS3808G18DBVT

Package：

SOT-23-6 (DBV) 2.9x2.8 mm

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Description

Product Overview

The TPS3808G18DBVT from Texas Instruments is a low-quiescent-current voltage supervisor in SOT-23-6 package, monitoring a 1.8V rail with 1.67V threshold. It features 0.5% threshold accuracy, programmable reset delay (1.25 ms to 10 s), manual reset input, and only 2.4 uA typical quiescent current, making it ideal for battery-powered and precision voltage monitoring applications.

Key Specifications

Monitored Rail 1.8V nominal
Threshold Voltage 1.67V (typical)
Threshold Accuracy 0.5% (typical)
Quiescent Current 2.4 uA (typical)
Reset Delay 1.25 ms to 10 s (programmable via CT)
Manual Reset Yes (MR pin, active low)
Reset Output Active-low, open-drain
Supply Voltage 1.8V – 6.5V
Package SOT-23-6 (DBV) 2.9×2.8 mm
Temperature -40 to +125 deg C

Features

  • 0.5% threshold accuracy for precise voltage monitoring
  • Ultra-low 2.4 uA quiescent current extends battery life
  • Flexible reset delay: 20 ms (CT open), 300 ms (CT to VDD), or 1.25 ms-10 s (CT capacitor)
    • Manual reset input MR pin for system-initiated reset
  • Small SOT-23-6 package for space-constrained designs

Applications

  • DSP and microcontroller power-on reset and brownout detection
  • Notebook and desktop computer voltage supervision
  • Battery-powered portable device power monitoring
  • FPGA and ASIC core voltage monitoring
  • Industrial control system power supervision

The TPS3808G18 is a member of the TPS3808 family of low-quiescent-current supervisory circuits from Texas Instruments, specifically designed to monitor 1.8V rails with a 1.67V threshold. The device asserts an active-low, open-drain RESET output when the SENSE voltage drops below the threshold or when the MR pin is pulled low. The RESET output remains low for a user-adjustable delay time after the fault condition clears. With 0.5% threshold accuracy, 2.4 uA typical quiescent current, and programmable delay from 1.25 ms to 10 seconds, it provides precise and flexible voltage supervision for battery-powered and precision systems.

The TPS3808G18 monitors the SENSE pin voltage against a precision 1.67V internal reference. When SENSE drops below the threshold, the open-drain RESET output is asserted low. The reset delay is configured via the CT pin: floating CT gives 20 ms, connecting CT to VDD through a resistor gives 300 ms, and connecting CT to an external capacitor allows adjustment from 1.25 ms to 10 seconds. The MR (manual reset) pin provides an additional active-low reset trigger. When SENSE rises above the threshold and MR is deasserted, an internal timer counts the programmed delay before releasing RESET. The device uses a precision bandgap reference to achieve 0.5% threshold accuracy for VIT <= 3.3V.

Pin Name Type Function
1 RESET Output Active-low reset output (open-drain)
2 GND Power Ground
3 MR Input Manual reset (active low)
4 CT Input Delay programming pin
5 SENSE Input Voltage sense input
6 VDD Power Supply voltage (1.8-6.5V)
  • MCU/DSP brownout detection: monitor 1.8V core rail during power transients
  • Battery-powered devices: 2.4 uA Iq minimizes drain on standby battery
  • FPGA power sequencing: programmable delay ensures stable voltage before releasing reset
  • Portable electronics: manual reset for user-initiated system restart
  • Industrial controllers: precision monitoring of 1.8V logic rails
Manufacturer Part Number Package Notes
TI TPS3808G33DBVR SOT-23-6 3.3V threshold variant (3.07V)
TI TPS3808G18DRVR WSON-6 Same function, WSON package
TI TPS3808G01DBVR SOT-23-6 Adjustable threshold (0.405V)
TI TPS3808E1802DBVR SOT-23-6 600 nA ultra-low Iq upgrade
ADI ADM803ZAKS SC-70 1.8V supervisor, fixed delay
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Service & Packaging

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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