Texas Instruments TPS3839L30DQNR

Overview

TPS3839L30DQNR from Texas Instruments is an ultralow-power voltage supervisor IC designed to monitor supply rails in battery-critical systems. It features a factory-trimmed 2.63 V reset threshold, 150 nA typical supply current at 25°C, push-pull RESET output, and valid operation down to 0.6 V VDD - enabling reliable power-on reset in single-cell alkaline or Li-ion applications such as glucose monitors and wearables.

For engineers reviewing the TPS3839L30DQNR datasheet, TPS3839L30DQNR pinout, TPS3839L30DQNR application, or TPS3839L30DQNR equivalent, key selection criteria include its 2.63 V threshold accuracy (±1% at 25°C), 200 ms reset delay, −40°C to +85°C operating range, X2SON-4 package compatibility, and immunity to fast VDD transients - all critical for low-voltage, long-life portable designs.

Technical Context

The TPS3839L30DQNR implements a precision bandgap-based voltage comparator with hysteresis (26 mV typical) to detect VDD drops below 2.63 V and assert an active-low RESET signal. Its sampling architecture draws only ~15 µA for ~200 µs per measurement cycle, sustaining average current at 150 nA while rejecting transients shorter than ~10 µs at 10% overdrive.

Unlike the TPS3831 variant, the TPS3839L30DQNR omits the manual reset (MR) input and uses a 3-pin functional configuration within the 4-pin X2SON (DQN) package - with Pin 2 internally unconnected (NC). The push-pull output drives microcontroller reset pins directly without external pull-up components.

Key Specifications

Pinout & Package

TPS3839L30DQNR is housed in a 1.00 mm × 1.00 mm, 4-pin X2SON (DQN) package with exposed thermal pad. Pin 2 is NC (no internal connection); functional terminals are VDD (Pin 3), GND (Pin 1), and RESET (Pin 4).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3839L30DQNR, TPS3831L30DQNR adds manual reset capability at no size or threshold penalty, while MAX6373XR26-T offers higher temperature rating and open-drain flexibility at the cost of 10× higher quiescent current - making TPS3839L30DQNR optimal for ultra-low-power, space-constrained, VDD-only supervision.

Availability

TPS3839L30DQNR is available at Aetrix Electronics and suitable for portable medical devices, wearable electronics, smart utility meters, and industrial IoT edge sensors requiring stable component supply across multi-year production cycles.

Supply support for TPS3839L30DQNR 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 precision analog signal chains.

The TPS383x family was developed specifically for ultralow-power voltage supervision in battery-operated and energy-harvesting systems - prioritizing nanoscale current efficiency, factory-trimmed accuracy, and transient immunity without sacrificing reliability.

FAQ

What is the exact reset threshold voltage of the TPS3839L30DQNR?

The TPS3839L30DQNR has a factory-trimmed negative-going threshold voltage (VIT–) of 2.63 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 L30 variant across all package options including DQNR.

Does the TPS3839L30DQNR support manual reset functionality?

No, the TPS3839L30DQNR does not include a manual reset (MR) input. It is a 3-terminal device implemented in a 4-pin X2SON package where Pin 2 is NC (no internal connection). Manual reset is exclusive to the TPS3831 series - for example, TPS3831L30DQNR provides identical 2.63 V threshold with MR support.

What package type and dimensions does the TPS3839L30DQNR use?

The TPS3839L30DQNR uses the X2SON-4 (DQN) package: 1.00 mm × 1.00 mm footprint, 0.4 mm height, with an exposed thermal pad. This is distinct from the SOT23-3 (DBZ) option used by other TPS3839 variants - the DQNR suffix explicitly denotes the X2SON package per TI's orderable addendum.

Can the TPS3839L30DQNR operate from a 0.8 V supply?

No, the TPS3839L30DQNR requires a minimum supply voltage of 0.9 V for guaranteed operation per Recommended Operating Conditions. While it asserts valid RESET down to 0.6 V (V(POR)), the device itself cannot function or sample VDD reliably below 0.9 V - attempting operation at 0.8 V may result in undefined behavior or failure to assert reset.

How does the TPS3839L30DQNR reject supply transients?

The TPS3839L30DQNR rejects fast VDD transients via internal sampling timing and hysteresis: it ignores glitches shorter than ~10 µs or with amplitude less than ~10% below VIT– (i.e., <2.37 V for 2.63 V threshold). This behavior is characterized in Figure 13 of SBVS193D and ensures immunity to switching noise or ESD-induced dips without external filtering.