Texas Instruments TPS3831G33DQNT

Overview

TPS3831G33DQNT from Texas Instruments is an ultralow-power voltage supervisor IC designed for single-rail supply monitoring in battery-critical systems. It features a factory-trimmed 3.08 V reset threshold, 150 nA typical supply current at 25°C, push-pull active-low RESET output, and operates across 0.9 V to 6.5 V supply range - enabling reliable power-on reset in glucose monitors and wearables.

For engineers reviewing the TPS3831G33DQNT datasheet, TPS3831G33DQNT pinout, TPS3831G33DQNT application, or TPS3831G33DQNT equivalent, key selection criteria include its 200 ms reset delay, −40°C to +85°C industrial temperature range, manual reset (MR) input support, and X2SON-4 package compatibility with space-constrained PCB layouts.

Technical Context

The TPS3831G33DQNT implements a precision comparator-based supervision architecture with hysteresis (31 mV typical) to prevent chatter during supply recovery. Its internal sampling circuit draws only ~15 µA for ~200 µs per measurement cycle, sustaining average quiescent current at 150 nA while maintaining valid RESET assertion down to VDD = 0.6 V.

Unlike the TPS3839 variant, the TPS3831G33DQNT includes a dedicated MR input pin that accepts logic-level signals (VIH = 0.7×VDD, VIL = 0.3×VDD) and features an internal 20 kΩ pullup resistor - enabling direct connection to microcontroller GPIO without external biasing.

Key Specifications

Pinout & Package

TPS3831G33DQNT is housed in a 1.00 mm × 1.00 mm, 4-pin X2SON (DQN) package with exposed thermal pad. The package supports reflow soldering per IPC-J-STD-020 Level-1 (260°C peak), and the thermal pad improves thermal dissipation and mechanical stability on PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3839G33DBZR, the TPS3831G33DQNT adds MR functionality in a smaller 1-mm² package but requires one additional PCB trace; versus MAX6373KSA+T, it delivers 8× lower supply current and 75% smaller footprint at equivalent threshold accuracy.

Availability

TPS3831G33DQNT is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, wearable fitness trackers, and smart metering modules requiring stable component supply across extended product lifecycles.

Supply support for TPS3831G33DQNT 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 low-power design and high-reliability industrial components.

The TPS383x family was developed specifically for ultralow-power voltage supervision in battery-constrained applications such as wearables, portable medical devices, and remote IoT endpoints - prioritizing nanoscale current efficiency and factory-trimmed accuracy.

FAQ

What is the exact reset threshold voltage of the TPS3831G33DQNT?

The TPS3831G33DQNT has a factory-trimmed negative-going threshold voltage (VIT–) of 3.08 V, with ±1% accuracy over temperature and process variation. This value is confirmed in the Electrical Characteristics table of the SBVS193D datasheet and applies specifically to the G33 variant across the full −40°C to +85°C operating range.

Does the TPS3831G33DQNT support manual reset functionality?

Yes, the TPS3831G33DQNT includes a dedicated MR (manual reset) input pin that forces the RESET output low when driven to logic low (≤0.3×VDD). After MR is deasserted, RESET remains low for the full 200 ms reset delay before releasing - a feature absent in the TPS3839 series and essential for controlled system reboots.

What is the minimum supply voltage at which TPS3831G33DQNT guarantees valid RESET output logic?

The TPS3831G33DQNT guarantees correct RESET output logic down to VDD = 0.6 V, as specified by the V(POR) parameter in Section 7.5 of the datasheet. Below this voltage, the RESET output becomes undefined and must not be relied upon for system control.

Can the TPS3831G33DQNT operate from a single alkaline cell?

Yes, the TPS3831G33DQNT operates across 0.9 V to 6.5 V and is explicitly validated for single-cell alkaline battery monitoring (e.g., Figure 15 in SBVS193D). Its 3.08 V threshold aligns with end-of-discharge detection for boosted 3.3 V rails, and its 150 nA current minimizes drain on aging cells.

What package type and dimensions does the TPS3831G33DQNT use?

The TPS3831G33DQNT uses the X2SON-4 (DQN) package: a 1.00 mm × 1.00 mm, 4-pin leadless package with exposed thermal pad. Its footprint is documented in TI's SLVU774 user guide for the TPS3831G33EVM-187 evaluation module and complies with IPC-J-STD-020 Level-1 reflow requirements.