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TPS3110E15DBVR

Ultra-low-Iq voltage supervisor with watchdog, 1.5V threshold, push-pull reset, SOT-23-6

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Manufacturer Part：

TPS3110E15DBVR

Package：

SOT-23-6 (2.90 x 1.60 x 1.20 mm)

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Description

Product Overview

The TPS3110E15DBVR from Texas Instruments is an ultra-low supply current voltage supervisor with watchdog timer in a SOT-23-6 package. With 1.2 µA typical supply current, 1.5 V threshold voltage, and push-pull reset output, it provides precision voltage monitoring for DSP and processor-based systems.

Key Specifications

Threshold Voltage 1.5 V (VIT-)
Threshold Accuracy 0.75%
Supply Current 1.2 µA (typ)
Reset Output Push-pull, active low
Watchdog Timer Yes (1.6 s timeout typ)
Manual Reset Yes (MR pin)
Reset Timeout 130 ms (typ)
Supply Voltage 0.9 V to 3.6 V (operating)
Operating Temperature -40°C to +125°C
Package SOT-23-6

Features

  • Ultra-low 1.2 µA typical supply current preserves battery life
  • Precision 0.75% threshold accuracy over temperature
  • Integrated watchdog timer for microprocessor supervision
  • Manual reset input for system-initiated reset
  • RESET valid with VDD as low as 0.4 V
  • 130 ms power-on reset timeout

Applications

  • DSP and processor reset supervision
  • Battery-powered system voltage monitoring
  • FPGA and ASIC power-on reset
  • Portable medical device supervision
  • Industrial control system watchdog

The TPS3110E15DBVR from Texas Instruments is an ultra-low supply current voltage supervisor with an integrated watchdog timer in a compact SOT-23-6 package. The E15 suffix indicates a 1.5 V threshold voltage with 0.75% accuracy for precise monitoring of low-voltage supply rails. The device draws only 1.2 µA typical supply current, making it ideal for battery-powered applications where standby current must be minimized. The push-pull active-low RESET output provides a defined logic level without external pull-up resistors. The integrated watchdog timer monitors microprocessor activity with a 1.6 second timeout, asserting RESET if the processor fails to toggle the WDI pin within the timeout period. A manual reset (MR) input allows system-initiated reset via a push-button or logic signal. The power-on reset generator provides a 130 ms timeout to ensure stable supply voltage before releasing RESET.

The TPS3110E15DBVR monitors the VDD supply voltage through an internal resistive divider that sets the threshold at 1.5 V (VIT-). When VDD drops below the threshold, the comparator output forces RESET low. When VDD rises above VIT- plus hysteresis, an internal timer starts counting 130 ms before releasing RESET high. The watchdog timer is a free-running oscillator that starts counting when WDI is not toggled. If WDI is not toggled within the watchdog timeout period (1.6 s typical), the watchdog asserts RESET low. Each WDI transition resets the watchdog counter. The manual reset (MR) input has an internal pull-up to VDD and asserts RESET low when driven below 0.4 V. All outputs are valid with VDD as low as 0.4 V, ensuring a defined reset state during power-up and power-down transients.

Pin Name Function
1 MR Manual reset input; active low, internal pull-up to VDD
2 GND Ground connection
3 RESET Active-low push-pull reset output
4 WDI Watchdog input; must be toggled within timeout to prevent reset
5 VDD Supply voltage and sense input (0.9 V to 3.6 V)
6 NC No connect
  • Processor Reset Supervision: Monitoring 1.5V core voltage rail in DSP and FPGA systems with watchdog protection against code runaway
  • Battery-Powered Systems: Ultra-low 1.2 µA supply current monitoring coin-cell or lithium primary battery voltage in IoT devices
  • Portable Medical Devices: Voltage supervision and watchdog for microcontroller-based glucose meters and pulse oximeters
  • Industrial Control: Watchdog timer protecting PLCs and motor controllers against software hang conditions
  • Power Supply Sequencing: Reset generation during multi-rail power-up and power-down sequences
Model Manufacturer Threshold Iq WD Output Notes
TPS3106E09DBVR TI 0.9 V 1.2 µA No Open-drain Lower threshold, dual output
MAX6346UR29+T Analog Devices 2.93 V 1 µA No Push-pull Similar Iq, higher threshold
ADM811JARTZ-REEL7 ADI 2.93 V 5 µA No Push-pull Higher Iq, no watchdog
TPS3839K33DBVR TI 3.3 V 150 nA No Open-drain Nano-power, no watchdog
MAX6818MEUB+T Analog Devices Adj 3 µA Yes Open-drain Adjustable threshold
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