Texas Instruments TPS3831G33DQNR

Overview

TPS3831G33DQNR from Texas Instruments is an ultralow-power voltage supervisor IC that monitors a single 3.08 V supply rail in battery-powered systems, asserts an active-low push-pull RESET signal when VDD drops below threshold, and maintains reset for 200 ms after recovery - used in glucose monitors and wearables requiring sub-200 nA quiescent current.

For engineers reviewing the TPS3831G33DQNR datasheet, TPS3831G33DQNR pinout, TPS3831G33DQNR application, or TPS3831G33DQNR equivalent, key selection criteria include factory-trimmed 3.08 V threshold accuracy (±1%), operation down to 0.9 V supply, valid RESET output at VDD ≥ 0.6 V, and compatibility with high-impedance sources via 0.1 µF bypass capacitor.

Technical Context

The TPS3831G33DQNR implements a precision bandgap-based voltage comparator with built-in hysteresis (31 mV) to reject fast transients on VDD, and features a manual reset (MR) input that forces RESET low independent of supply voltage. Its sampling architecture draws only ~15 µA for 200 µs during threshold evaluation, enabling 150 nA typical supply current.

It operates across –40°C to +85°C, supports supply voltages from 0.9 V to 6.5 V, and guarantees valid logic states on RESET down to VDD = 0.6 V. The MR pin includes a 20 kΩ internal pullup to VDD, allowing direct connection to open-drain logic without external components.

Key Specifications

Pinout & Package

TPS3831G33DQNR uses a 4-pin, 1.00 mm × 1.00 mm X2SON (DQN) package with exposed thermal pad for mechanical stability and thermal performance. Pin 1 is VDD, Pin 2 is GND, Pin 3 is RESET, Pin 4 is MR.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3831G33DQNR, TPS3839G33DBZR removes MR capability but saves PCB area, while MAX6373XR33+T trades 8× higher supply current for SOIC-8 manufacturability - neither offers identical combination of 3.08 V precision, MR input, and X2SON size.

Availability

TPS3831G33DQNR is available at Aetrix Electronics and suitable for glucose monitors, wearable health trackers, smart meter backup systems, and industrial IoT sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for TPS3831G33DQNR 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 ICs.

The TPS383x family was designed specifically for ultralow-power voltage supervision in battery-critical applications such as medical wearables and portable instrumentation, prioritizing nanoscale current consumption and factory-trimmed accuracy.

FAQ

What is the exact reset threshold voltage of the TPS3831G33DQNR?

The TPS3831G33DQNR has a factory-trimmed negative-going threshold voltage (VIT–) of 3.08 V with ±1% accuracy over temperature. This value is confirmed in the Electrical Characteristics table of the SBVS193D datasheet and applies specifically to the G33 variant. The corresponding hysteresis is 31 mV, yielding a positive-going release point of 3.111 V.

Does the TPS3831G33DQNR require an external bypass capacitor?

Yes, the TPS3831G33DQNR requires a 0.1 µF ceramic bypass capacitor placed close to the VDD pin. This is necessary because the device draws ~15 µA for ~200 µs during voltage sampling; without the capacitor, high source impedance can cause false resets due to localized VDD droop.

Can the TPS3831G33DQNR operate with supply voltages below 1.0 V?

Yes, the TPS3831G33DQNR operates from 0.9 V to 6.5 V per Recommended Operating Conditions. It guarantees valid RESET logic states down to VDD = 0.6 V (V(POR)), though functional supervision begins at 0.9 V. This makes it suitable for single-cell alkaline and NiMH battery monitoring through full discharge.

How does the manual reset (MR) pin function on the TPS3831G33DQNR?

The MR pin on the TPS3831G33DQNR is an active-low input with 0.3×VDD logic-low threshold. Pulling MR low forces RESET low regardless of VDD level. After MR returns high, RESET remains low for the full 200 ms reset delay (td) if VDD is above threshold. An internal 20 kΩ pullup to VDD allows MR to float if unused.

What package type and dimensions does the TPS3831G33DQNR use?

The TPS3831G33DQNR uses the X2SON-4 (DQN) package: 1.00 mm × 1.00 mm body with 0.5 mm pitch, 4 signal pins plus thermal pad. This is confirmed in the Device Information table and Package Option Addendum of the SBVS193D datasheet. The part marking is "G3" per TI's orderable addendum.