Texas Instruments TPS3106E09DBVT

Overview

TPS3106E09DBVT 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 open-drain reset signals when either supply drops below its respective threshold.

For engineers reviewing the TPS3106E09DBVT datasheet, TPS3106E09DBVT pinout, TPS3106E09DBVT application, or TPS3106E09DBVT equivalent, key selection criteria include its dual-sense capability, sub-1μA quiescent current at low VDD, –40°C to 125°C operating range, and SOT-23-6 package compatibility with space-constrained portable designs.

Technical Context

The TPS3106E09DBVT 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 outputs-RSTVDD and RSTSENSE-are active-low, open-drain, and independently asserted based on their respective input voltages.

It features a manual reset (MR) input with internal 100 kΩ pullup, power-on reset delay of 130 ms after VDD exceeds VIT– + VHYS, and operates from 0.9 V to 3.6 V supply. No watchdog timer or PFI/PFO functionality is present-this is a dedicated dual-threshold supervisor without timing supervision beyond the fixed POR delay.

Key Specifications

Pinout & Package

TPS3106E09DBVT is housed in a 6-pin SOT-23 (DBV) package, 2.90 mm × 2.80 mm footprint, with exposed pad not electrically connected. Pin functions are validated per TI SLVS363H Figure 5-2 and Table 5-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3106K33DBVT and TPS3823-09DBVT, the TPS3106E09DBVT uniquely delivers sub-1 V VDD supervision with concurrent auxiliary rail monitoring in a single SOT-23-6 package-enabling compact, multi-rail fault detection unattainable with either alternative.

Availability

TPS3106E09DBVT is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3106E09DBVT 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 delivering analog and embedded processing solutions, with leadership in power management, signal chain, and real-time control technologies.

The TPS31xx family is designed specifically for ultra-low-power voltage supervision in battery-critical and thermally demanding applications-emphasizing precision thresholds, nanoscale leakage control, and robust operation from –40°C to 125°C.

FAQ

What is the exact VDD threshold voltage of the TPS3106E09DBVT and how tightly is it specified?

The TPS3106E09DBVT has a nominal VDD threshold voltage (VIT–) of 0.86 V, with guaranteed accuracy of ±0.75% over temperature (–40°C to 125°C). At 25°C, the specification is tighter: 0.854 V (min) to 0.866 V (max). This precision eliminates calibration overhead in low-voltage microcontroller systems and ensures reliable brownout detection at 0.9 V rails. The TPS3106E09DBVT datasheet confirms this value in Section 6.5 Electrical Characteristics.

Does the TPS3106E09DBVT support monitoring of voltages higher than its VDD supply?

Yes-the TPS3106E09DBVT supports monitoring voltages higher than VDD via its SENSE input, which compares against a fixed 0.551 V internal reference. By using an external resistor divider (e.g., R1 = 820 kΩ, R2 = 430 kΩ), users can scale a 1.6 V battery down to 0.551 V at the SENSE pin. The TPS3106E09DBVT's SENSE input operates correctly as long as VDD ≥ 0.8 V, making it suitable for supervising 3.3 V, 5 V, or even higher auxiliary rails.

What are the output configurations of the TPS3106E09DBVT and how should they be terminated?

The TPS3106E09DBVT provides two independent active-low open-drain outputs: RSTVDD (Pin 1) and RSTSENSE (Pin 6). Each requires an external pullup resistor to a valid logic-high voltage (e.g., 3.3 V or VDD). Typical values range from 10 kΩ to 100 kΩ depending on rise time and bus loading requirements. Neither output is push-pull-so level-shifting or wired-OR logic with other open-drain signals is fully supported. This configuration is confirmed in the TPS3106E09DBVT functional block diagram (Figure 7-2) and pin table.

How does the manual reset (MR) pin function on the TPS3106E09DBVT?

The MR pin (Pin 3) of the TPS3106E09DBVT is an active-low input with an internal 100 kΩ pullup resistor. Pulling MR to GND forces both RSTVDD and RSTSENSE low immediately and holds them low for the full 130 ms reset delay after MR returns high. If unused, MR may be left floating (due to internal pullup) or tied to VDD. For noise immunity in harsh environments, a 0.1 μF capacitor from MR to GND is recommended. This behavior is documented in Section 7.3.2 and Table 7-2 of the TPS3106E09DBVT datasheet.

Is the TPS3106E09DBVT compatible with the same PCB footprint as other TPS31xx devices in SOT-23-6?

Yes-the TPS3106E09DBVT uses the standard DBV (SOT-23-6) package with identical 2.90 mm × 2.80 mm dimensions and pinout as all TPS3103/TPS3106/TPS3110 variants. Pin 1 is RSTVDD, Pin 2 is GND, Pin 3 is MR, Pin 4 is VDD, Pin 5 is SENSE, and Pin 6 is RSTSENSE-matching the mechanical drawing in Section 11 of the TPS3106E09DBVT datasheet. This enables drop-in replacement within the same family for different threshold versions, provided the application logic accommodates the specific VIT– value.