Texas Instruments TPS3831E16DQNT

Overview

TPS3831E16DQNT 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 1.52 V reset threshold, 150 nA typical supply current at 25°C, push-pull RESET output, and operates across 0.9 V to 6.5 V supply range with valid reset assertion down to 0.6 V. It is used in glucose monitors and wearables where long battery life and reliable power-on reset are essential.

For engineers reviewing the TPS3831E16DQNT datasheet, TPS3831E16DQNT pinout, TPS3831E16DQNT application, or TPS3831E16DQNT equivalent, key selection considerations include its 1.52 V threshold accuracy (±1% at 25°C), 200 ms reset delay, manual reset (MR) input support, thermal stability over –40°C to +85°C, and X2SON-4 package compatibility with space-constrained PCB layouts.

Technical Context

The TPS3831E16DQNT implements a precision comparator-based supervision architecture with built-in hysteresis (15 mV typical) to prevent chatter during supply recovery. Its internal sampling circuit draws only ~15 µA for ~200 µs per measurement cycle, enabling the 150 nA average quiescent current while maintaining accurate threshold detection.

It integrates a dedicated manual reset (MR) input that forces active-low RESET assertion independent of VDD level, with internal 20 kΩ pullup to VDD - allowing MR to be left floating when unused. The push-pull RESET output drives logic inputs directly without external pullup, supporting up to 8 mA sink current and maintaining valid logic states down to VDD = 0.6 V.

Key Specifications

Pinout & Package

The TPS3831E16DQNT is housed in a 1.00 mm × 1.00 mm, 4-pin X2SON (DQN) package with exposed thermal pad for mechanical stability and improved thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3831E16DQNT, TPS3839E16DBZR offers identical supervision performance in a simpler 3-pin package but sacrifices MR flexibility, while MAX6375XR22+T trades 10× higher current and no MR for broader vendor availability and legacy design reuse - neither matches the combination of 1.52 V precision, MR capability, and nanoscale quiescent draw in the TPS3831E16DQNT.

Availability

TPS3831E16DQNT is available at Aetrix Electronics and suitable for glucose monitors, wearable health patches, and industrial portable meters requiring stable component supply with guaranteed long-term manufacturability and full TI lifecycle support.

Supply support for TPS3831E16DQNT 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 low-power design and precision analog IP.

The TPS383x product line was developed specifically for ultra-low-power voltage supervision in battery-operated medical, metering, and portable electronics - prioritizing sub-200 nA operation, wide VDD range, and factory-trimmed accuracy without external components.

FAQ

What is the exact reset threshold voltage of the TPS3831E16DQNT?

The TPS3831E16DQNT has a factory-trimmed negative-going threshold voltage (VIT–) of 1.52 V, with ±1% accuracy at 25°C and ±1.5% over the full –40°C to +85°C operating range. This value is confirmed in the Electrical Characteristics table of the SBVS193D datasheet and applies specifically to the TPS3831E16DQNT variant, not the broader TPS383x family.

Does the TPS3831E16DQNT support manual reset functionality?

Yes, the TPS3831E16DQNT includes a dedicated MR (manual reset) input pin that asserts the active-low RESET output when pulled to logic low (≤0.3×VDD). After MR is released, RESET deasserts only after the 200 ms reset delay elapses - provided VDD remains above 1.52 V. This feature is exclusive to the TPS3831 series and is not present in the TPS3839 variants.

What package type and dimensions does the TPS3831E16DQNT use?

The TPS3831E16DQNT uses the X2SON-4 (DQN) package: a 1.00 mm × 1.00 mm, 4-pin leadless package with an exposed thermal pad. Its footprint is defined in TI's SLVU774 and SLVU758 EVM user guides, and it complies with JEDEC MO-229 standards. The part marking "A5" appears on the top surface per TI's orderable addendum.

Can the TPS3831E16DQNT operate reliably below 1.0 V?

Yes - the TPS3831E16DQNT guarantees valid RESET output logic states down to VDD = 0.6 V, and its minimum operating supply voltage is specified as 0.9 V. The device continues asserting RESET until VDD rises above 1.52 V and remains there for 200 ms, making it suitable for deep brownout recovery in energy-harvesting and coin-cell systems.

How does the TPS3831E16DQNT achieve 150 nA supply current?

The TPS3831E16DQNT achieves 150 nA typical supply current through a duty-cycled sampling architecture: it draws ~15 µA for ~200 µs every ~100 ms to measure VDD, resulting in an average current of 150 nA. This technique is detailed in Section 9.2.2.1 of the SBVS193D datasheet and is validated across temperature and supply voltage conditions.