Texas Instruments TPS3831E16DQNR

Overview

TPS3831E16DQNR 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, valid operation down to 0.6 V VDD, and operates across –40°C to +85°C. It is used to ensure reliable power-on reset in glucose monitors and wearables.

For engineers reviewing the TPS3831E16DQNR datasheet, TPS3831E16DQNR pinout, TPS3831E16DQNR application, or TPS3831E16DQNR equivalent, key selection criteria include its 1.52 V threshold accuracy (±1% at 25°C), 200 ms reset delay, manual reset (MR) input support, X2SON-4 package compatibility, and ability to maintain valid logic state below 1 V supply.

Technical Context

The TPS3831E16DQNR implements a precision comparator with hysteresis (15 mV typical) to detect VDD drops below its negative-going threshold (VIT– = 1.52 V). Its internal sampling architecture draws only ~15 µA for ~200 µs per measurement cycle, enabling 150 nA average quiescent current.

It includes a dedicated manual reset (MR) input that forces active-low RESET assertion independent of VDD level, with internal 20 kΩ pullup to VDD. The push-pull RESET output drives loads up to 2 mA while maintaining VOL ≤ 0.4 V and VOH ≥ VDD – 0.4 V across full operating range.

Key Specifications

Pinout & Package

TPS3831E16DQNR is housed in a 1.00 mm × 1.00 mm, 4-pin X2SON (DQN) package with exposed thermal pad. This ultra-compact leadless package supports high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3831E16DQNR, TPS3831G12DQNR shifts threshold downward for earlier intervention in lower-voltage systems, while TPS3839E16DBZR sacrifices MR capability for smaller footprint and reduced BOM count-both retain identical core supervision performance.

Availability

TPS3831E16DQNR is available at Aetrix Electronics and suitable for portable medical devices, industrial battery-backed meters, and wearable electronics requiring stable component supply over extended production lifecycles.

Supply support for TPS3831E16DQNR 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 for industrial, automotive, and personal electronics markets.

The TPS383x family was developed specifically for ultralow-power supply monitoring in battery-operated equipment, emphasizing sub-200 nA operation, wide input voltage range, and factory-trimmed precision thresholds.

FAQ

What is the exact reset threshold voltage of the TPS3831E16DQNR?

The TPS3831E16DQNR has a factory-trimmed negative-going threshold voltage (VIT–) of 1.52 V with ±1% accuracy at 25°C. This value is confirmed in the Electrical Characteristics table of the SBVS193D datasheet, and measured across the full –40°C to +85°C operating range with typical hysteresis of 15 mV. The TPS3831E16DQNR maintains this precision without external components.

Does the TPS3831E16DQNR support manual reset functionality?

Yes, the TPS3831E16DQNR includes a dedicated MR (manual reset) input pin. Pulling MR low (≤0.3×VDD) forces the RESET output active regardless of VDD level. After MR is released, RESET deasserts only after the 200 ms delay elapses-provided VDD remains above 1.52 V. The MR pin features an internal 20 kΩ pullup to VDD, allowing it to float if unused.

What package type and dimensions does the TPS3831E16DQNR use?

The TPS3831E16DQNR uses the X2SON-4 (DQN) package: a 1.00 mm × 1.00 mm, 4-pin leadless package with exposed thermal pad. Pin 1 is VDD, Pin 2 is GND, Pin 3 is RESET, and Pin 4 is MR. The package complies with JEDEC MO-229 and supports reflow soldering per Level-1-260C-UNLIM MSL rating.

Can the TPS3831E16DQNR operate reliably below 1 V supply voltage?

Yes-the TPS3831E16DQNR guarantees valid RESET output logic state for VDD ≥ 0.6 V, as specified in the Electrical Characteristics table under "V(POR) Minimum VDD voltage for valid output." While recommended operating range starts at 0.9 V, the device remains functional down to 0.6 V, enabling robust end-of-battery detection in alkaline and lithium systems.

How does the TPS3831E16DQNR achieve 150 nA typical supply current?

The TPS3831E16DQNR 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 ultra-low average current. This design is validated across temperature and supply voltage (1.2 V to 6.5 V), with measured current rising only to ~500 nA maximum at 85°C per the datasheet's typical characteristics graph G001.