Texas Instruments TPS3106E09DBVR

Overview

TPS3106E09DBVR from Texas Instruments is an ultralow-supply-current voltage supervisor IC with dual reset outputs (RSTVDD and RSTSENSE), fixed 0.86 V VDD threshold, 0.551 V SENSE threshold, ±0.75% trip-point accuracy, and 1.2 μA typical supply current. It monitors core and I/O rails in battery-powered microcontroller systems, asserting active-low open-drain resets when either supply falls below its respective threshold.

For engineers reviewing the TPS3106E09DBVR datasheet, TPS3106E09DBVR pinout, TPS3106E09DBVR application, or TPS3106E09DBVR equivalent, key selection criteria include dual-rail supervision capability, sub-1μA quiescent current at 0.9V operation, –40°C to 125°C temperature range, SOT-23-6 package compatibility, and manual reset (MR) support with internal 100 kΩ pullup.

Technical Context

The TPS3106E09DBVR implements two independent comparators: one monitoring VDD against a precision 0.86 V internal reference (VIT– = 0.86 V, ±0.75%), and another monitoring the SENSE pin against a fixed 0.551 V reference (VIT–(S) = 0.551 V, ±0.75%). Both comparators drive separate open-drain outputs-RSTVDD and RSTSENSE-with identical timing behavior: 130 ms power-on reset delay after VDD exceeds VIT– + VHYS, and 40 μs propagation delay from input transition to output assertion.

It operates across 0.9 V to 3.6 V supply range with full functionality down to 0.4 V VDD for initial reset assertion. The MR pin provides asynchronous reset control with internal 100 kΩ pullup, and supports noise immunity via optional 0.1 μF capacitor to GND. No watchdog or PFI/PFO functions are present-this is a dedicated dual-threshold supervisor variant.

Key Specifications

Pinout & Package

TPS3106E09DBVR is housed in a 6-pin SOT-23 (DBV) package measuring 2.90 mm × 2.80 mm, rated for –40°C to 125°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TPS3106K33DBVR and TPS3808G09DBVR, the TPS3106E09DBVR uniquely delivers fixed 0.86 V VDD supervision plus independent SENSE monitoring in one SOT-23-6 package-enabling compact, accurate dual-rail reset without design compromises.

Availability

TPS3106E09DBVR is available at Aetrix Electronics and suitable for battery-powered microcontrollers, industrial sensor nodes, automotive body control modules, and multi-rail power sequencing applications requiring stable component supply and long-term lifecycle support.

Supply support for TPS3106E09DBVR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and microcontroller solutions.

The TPS31xx family is designed specifically for precision, ultralow-power voltage supervision in battery-critical and thermally demanding applications-emphasizing accuracy, wide temperature range, and minimal quiescent current.

FAQ

What is the exact VDD threshold voltage of the TPS3106E09DBVR and how is it specified?

The TPS3106E09DBVR has a nominal VDD threshold voltage of 0.86 V, with a guaranteed tolerance of ±0.75% over temperature (–40°C to 125°C). At 25°C, the specification is 0.854 V (min) to 0.866 V (max); over full temperature range, it is 0.817 V (min) to 0.903 V (max). This value is factory-trimmed and applies exclusively to the VDD pin-no external components are required to set this threshold. The 'E09' suffix in TPS3106E09DBVR explicitly denotes this 0.86 V variant.

Does the TPS3106E09DBVR support monitoring of voltages higher than its VDD supply?

Yes, the TPS3106E09DBVR supports monitoring of higher voltages via its SENSE pin, which compares the applied voltage to a fixed 0.551 V internal reference. Using an external resistor divider (e.g., 820 kΩ/430 kΩ), users can scale a 1.6 V battery or 3.3 V I/O rail down to 0.551 V for accurate supervision. The TPS3106E09DBVR's RSTSENSE output asserts low when the scaled voltage falls below threshold-enabling dual-rail monitoring without increasing supply voltage.

What are the output configurations of the TPS3106E09DBVR and how do they interface with downstream logic?

The TPS3106E09DBVR provides two active-low, open-drain outputs: RSTVDD and RSTSENSE. Each requires an external pullup resistor to the appropriate logic rail (e.g., 3.3 V for MCU reset input). This configuration allows wired-OR connection of multiple supervisors and supports mixed-voltage systems. Neither output is push-pull-the TPS3106E09DBVR does not drive high actively, ensuring safe reset assertion even during power loss or brownout events.

How does the manual reset (MR) pin function on the TPS3106E09DBVR and what external components are needed?

The MR pin on the TPS3106E09DBVR is an active-low input with an internal 100 kΩ pullup resistor to VDD, so it defaults high and requires no external pullup. Driving MR low forces both RSTVDD and RSTSENSE low immediately and holds them low for 130 ms after MR returns high. A simple momentary switch from MR to GND suffices for manual reset; adding a 0.1 μF capacitor from MR to GND improves noise immunity in electrically noisy environments. No external resistor is required unless driving MR from an open-drain source.

Is the TPS3106E09DBVR compatible with other members of the TPS31xx family in terms of pinout and PCB layout?

Yes, the TPS3106E09DBVR shares the identical 6-pin SOT-23 (DBV) package, pinout, and footprint with all TPS3103, TPS3106, and TPS3110 variants-including TPS3106K33DBVR and TPS3110K33DBVR. Pin assignments (RSTVDD, GND, MR, VDD, SENSE, RSTSENSE) are consistent across the TPS3106 subfamily. This enables drop-in replacement for different threshold versions during design iteration or qualification-provided the application's voltage supervision requirements align with the selected variant's VDD and SENSE thresholds.