Texas Instruments TPS3106E09DBVRG4

Overview

TPS3106E09DBVRG4 from Texas Instruments is an ultralow-quiescent-current voltage supervisor IC with dual reset outputs (RSTVDD and RSTSENSE), fixed 0.86 V VDD threshold, ±0.75% trip-point accuracy, 1.2 μA typical supply current, and operation from 0.9 V to 3.6 V supply. It monitors both main supply (VDD) and auxiliary voltages (via SENSE pin) in battery-powered microcontroller systems requiring precise brownout detection.

For engineers reviewing the TPS3106E09DBVRG4 datasheet, TPS3106E09DBVRG4 pinout, TPS3106E09DBVRG4 application, or TPS3106E09DBVRG4 equivalent, key selection criteria include its dual-output supervision architecture, sub-1μA active 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 TPS3106E09DBVRG4 implements two independent comparators: one monitors VDD against a factory-trimmed 0.86 V threshold (VIT– = 0.86 V, ±0.75% over temperature), the other compares SENSE input to a 0.551 V reference with 15 mV hysteresis. Both outputs are active-low open-drain and operate down to VDD = 0.4 V for reliable power-on reset assertion.

Its internal 130 ms reset delay timer activates only after VDD exceeds VIT– + VHYS, ensuring stable system initialization. The MR pin features a 100 kΩ internal pullup and supports manual reset assertion with no external components required - critical for field-serviceable embedded devices.

Key Specifications

Pinout & Package

TPS3106E09DBVRG4 is housed in a 6-pin SOT-23 (DBV) package measuring 2.90 mm × 2.80 mm, optimized for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3106K33DBVR and TPS3823-09DBVR, the TPS3106E09DBVRG4 uniquely delivers sub-1μA operation with dual independent reset outputs at the lowest VDD threshold in the family - making it the sole option for battery voltage supervision below 1.0 V while maintaining auxiliary rail monitoring.

Availability

TPS3106E09DBVRG4 is available at Aetrix Electronics and suitable for battery-powered microcontrollers, industrial sensor nodes, portable medical devices, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3106E09DBVRG4 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 leader delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TPS31xx family was designed specifically for ultralow-power voltage supervision in battery-critical systems, emphasizing precision threshold accuracy, sub-microamp quiescent current, and dual-rail monitoring capability in miniature SOT-23 packages.

FAQ

What is the exact VDD threshold voltage of the TPS3106E09DBVRG4 and how tightly is it specified?

The TPS3106E09DBVRG4 has a factory-trimmed VDD threshold voltage (VIT–) of 0.86 V, with guaranteed accuracy of ±0.75% over the full –40°C to 125°C temperature range. At 25°C, the specification is tighter: 0.854 V (min) to 0.866 V (max). This precision eliminates the need for external calibration in applications like battery end-of-life detection where 10–20 mV margin is critical. The TPS3106E09DBVRG4 achieves this via laser-trimmed internal voltage dividers during wafer test.

Can the TPS3106E09DBVRG4 monitor two different supply rails simultaneously, and how does that work?

Yes, the TPS3106E09DBVRG4 monitors two rails simultaneously using dedicated circuitry: VDD is compared to its fixed 0.86 V threshold to generate RSTVDD, while the SENSE pin is compared to a separate 0.551 V reference to generate RSTSENSE. These paths are electrically isolated - a fault on one rail does not affect the other's reset assertion. For example, in a DSP system, VDD can supervise the 3.3 V IO rail while SENSE (with external divider) monitors a 1.5 V core voltage. The TPS3106E09DBVRG4 datasheet confirms independent timing and hysteresis for each channel.

What is the minimum supply voltage at which the TPS3106E09DBVRG4 can assert a valid reset signal?

The TPS3106E09DBVRG4 can assert a valid reset signal with VDD as low as 0.4 V - confirmed in Section 3 of the datasheet and Figure 6-3 timing diagram. This capability ensures reliable power-on reset generation even during deep battery discharge or cold-temperature startup where supply rails may sag below 0.8 V. Below 0.4 V, the internal comparators and logic cease functioning, but the TPS3106E09DBVRG4 guarantees defined behavior down to this limit, unlike many competitors that require ≥0.7 V for reset assertion.

Does the TPS3106E09DBVRG4 require external components for basic operation, and what is the role of the MR pin?

No external components are required for basic operation of the TPS3106E09DBVRG4: it includes an internal 100 kΩ pullup resistor on the MR pin, eliminating the need for an external pullup. The MR pin is a manual reset input - pulling it low forces both RSTVDD and RSTSENSE active regardless of VDD or SENSE voltage levels. Reset remains asserted for the full 130 ms timeout after MR returns high, ensuring robust debouncing without external RC networks. This integrated feature simplifies BOM and layout for handheld and medical devices where reliability is paramount.

How does the SENSE input function, and what voltage range can it monitor using external resistors?

The SENSE input of the TPS3106E09DBVRG4 compares applied voltage to a precise 0.551 V internal reference. To monitor voltages above 0.551 V (e.g., 1.2 V, 3.3 V), an external resistor divider scales the target rail down to ≤0.551 V. The datasheet specifies that the sum of R1 + R2 should be ~1 MΩ to minimize current draw, and resistor tolerance must be ≤1% to maintain threshold accuracy. For example, monitoring a 1.6 V battery uses R1 = 820 kΩ and R2 = 430 kΩ per Equation 1 in Section 8.2.2 - a configuration validated in the TPS3106E09DBVRG4 typical application schematic.