Texas Instruments TPS3106K33MDBVREP

Overview

TPS3106K33MDBVREP from Texas Instruments is an ultra-low-power, radiation-hardened supervisory circuit designed for precision supply voltage monitoring in high-reliability embedded systems. It features dual open-drain reset outputs (RSTVDD and RSTSENSE), a fixed 2.941 V threshold on VDD, 0.551 V sense threshold on SENSE, 1.2 µA typical supply current, and operates across –55°C to 125°C. It is used in space-grade DSP power sequencing and battery-backed industrial controllers where deterministic reset timing and extended temperature stability are critical.

For engineers reviewing the TPS3106K33MDBVREP datasheet, TPS3106K33MDBVREP pinout, TPS3106K33MDBVREP application, or TPS3106K33MDBVREP equivalent, key selection criteria include its dual-sense capability (VDD + external SENSE), 130 ms power-on reset delay, ±0.75% trip-point accuracy, and SOT-23-6 packaging with enhanced product-change notification and controlled baseline manufacturing.

Technical Context

The TPS3106K33MDBVREP implements two independent comparators: one monitors VDD against a factory-trimmed 2.941 V threshold (VIT–), while the second compares the SENSE pin to a stable 0.551 V internal reference. Both paths feed into shared reset logic with a 130 ms timeout timer that initiates only after VDD or SENSE rises above their respective thresholds.

Its open-drain RSTVDD and RSTSENSE outputs allow flexible pull-up configuration and independent system-level reset control-e.g., asserting RSTVDD for main supply brownout and RSTSENSE for auxiliary rail or battery voltage monitoring. The device requires no external components for basic operation and supports manual reset via MR with internal 100 kΩ pullup.

Key Specifications

Pinout & Package

SOT-23-6 (DBV) package: 2.9 mm × 1.6 mm × 1.45 mm body, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3106K33DBVR and MAX6369KA33+T, the TPS3106K33MDBVREP uniquely delivers radiation-hardened dual-rail supervision at 1.2 µA with ±0.75% accuracy across –55°C to 125°C-making it irreplaceable in mission-critical avionics and defense electronics where failure modes must be eliminated, not mitigated.

Availability

TPS3106K33MDBVREP is available at Aetrix Electronics and suitable for aerospace avionics, downhole instrumentation, and military communications equipment requiring stable component supply under extended temperature and radiation constraints.

Supply support for TPS3106K33MDBVREP 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 specializing in analog, embedded processing, and high-reliability components for industrial, automotive, and aerospace markets.

The TPS31xx-EP family was engineered for extended-temperature, high-integrity power management in mission-critical systems-delivering precision voltage supervision with enhanced manufacturing pedigree and DMS support.

FAQ

What is the exact reset threshold voltage for TPS3106K33MDBVREP on the VDD pin?

The TPS3106K33MDBVREP has a factory-trimmed VDD threshold voltage (VIT–) of 2.941 V at 25°C, with guaranteed tolerance of ±0.75% over temperature (–55°C to 125°C). This value is confirmed in the Electrical Characteristics table of the SLVS686 datasheet and applies specifically to the K33 variant. The TPS3106K33MDBVREP does not support adjustable thresholds-its VDD sensing is fixed and laser-trimmed during production.

Does TPS3106K33MDBVREP support monitoring a secondary voltage rail other than VDD?

Yes, the TPS3106K33MDBVREP includes a dedicated SENSE input pin that compares an external voltage (via resistor divider) to a precise 0.551 V internal reference. When the divided voltage falls below this threshold, the RSTSENSE output is asserted independently of VDD status. This capability is explicitly documented in the Functional Block Diagram, Terminal Functions table, and Application Information section of the TPS3106K33MDBVREP datasheet.

What is the function of the MR pin on TPS3106K33MDBVREP, and how should it be configured?

The MR (Manual Reset) pin on TPS3106K33MDBVREP is an active-low input that forces reset when pulled below 0.3 × VDD. It features an internal 100 kΩ pullup resistor, so it may be left unconnected if unused. For manual reset functionality, connect a normally open switch between MR and GND. No external debounce circuitry is required-the internal timer ensures clean assertion. This behavior is verified in the Terminal Functions table and Figure 2 timing diagram of the SLVS686 datasheet.

Can TPS3106K33MDBVREP operate with supply voltages below 1.0 V?

Yes, the TPS3106K33MDBVREP begins operation at VDD = 0.4 V and remains functional down to this level, as specified in the Recommended Operating Conditions table. Its internal comparators and reset logic are designed for ultra-low-voltage startup-critical for battery-powered systems recovering from deep discharge. However, SENSE and MR functions require VDD ≥ 0.8 V for proper operation, per datasheet Section 6.3.

What package type and markings identify TPS3106K33MDBVREP on the physical device?

The TPS3106K33MDBVREP is supplied in a SOT-23-6 (DBV) package with standardized JEDEC MO-178 dimensions: 2.9 mm × 1.6 mm × 1.45 mm. The top-side marking is "AAVM", as confirmed in the Package Option Addendum and Orderable Part Number table. This marking appears adjacent to the pin-1 indicator (dot or chamfer) on the package body and is unique to the TPS3106K33MDBVREP variant within the DBV-6 footprint.