Texas Instruments TPS3839L30DQNT

Overview

TPS3839L30DQNT from Texas Instruments is an ultralow-power voltage supervisor IC designed for supply monitoring 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.

For engineers reviewing the TPS3839L30DQNT datasheet, TPS3839L30DQNT pinout, TPS3839L30DQNT application, or TPS3839L30DQNT equivalent, this page delivers verified electrical parameters, X2SON-4 package mapping, thermal behavior across –40°C to +85°C, and design guidance for low-impedance VDD routing and bypass capacitor placement.

Technical Context

The TPS3839L30DQNT implements a precision comparator-based supervision architecture with hysteresis (26 mV typical) to prevent chatter during supply recovery. Its internal sampling circuit draws ~15 µA for ~200 µs per measurement cycle while maintaining 150 nA average quiescent current - a key enabler for multi-year battery life in wearables and metering.

Unlike the TPS3831 family, the TPS3839L30DQNT omits the manual reset (MR) input and uses a 3-pin SOT23 or 4-pin X2SON package; this variant is optimized for space-constrained, cost-sensitive designs where external reset assertion is unnecessary.

Key Specifications

Pinout & Package

TPS3839L30DQNT is housed in a 1.00 mm × 1.00 mm, 4-pin X2SON (DQN) package with exposed thermal pad. Pin 1 = VDD, Pin 2 = GND, Pin 3 = RESET, Pin 4 = NC (no internal connection). The thermal pad must be connected to ground for mechanical stability and thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3839L30DQNT, the TPS3831L30DQNT adds manual reset capability at identical threshold and package, while the MAX6373XR26-T trades 8× higher quiescent current for broader vendor support - making TPS3839L30DQNT optimal for ultra-low-power, new-design applications.

Availability

TPS3839L30DQNT is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, wearable fitness trackers, and industrial IoT edge nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS3839L30DQNT 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 battery-constrained applications demanding nanoscale quiescent current and factory-trimmed voltage thresholds - targeting glucose monitors, wearables, and smart meters.

FAQ

What is the exact reset threshold voltage of the TPS3839L30DQNT?

The TPS3839L30DQNT has a factory-trimmed negative-going threshold voltage (VIT–) of 2.63 V with ±1% accuracy over –40°C to +85°C. This value is confirmed in the Electrical Characteristics table of the SBVS193D datasheet, and applies specifically to the 'L30' variant - not to other members of the TPS383x family.

Does the TPS3839L30DQNT include a manual reset (MR) input?

No, the TPS3839L30DQNT does not include a manual reset input. Unlike the TPS3831 series, the TPS3839 family omits the MR pin. The TPS3839L30DQNT is offered only in 3-pin SOT23 (DBZ) or 4-pin X2SON (DQN) packages with VDD, GND, and RESET terminals - with Pin 4 in DQN being NC (no internal connection).

What is the minimum VDD voltage at which the TPS3839L30DQNT guarantees valid RESET output logic?

The TPS3839L30DQNT guarantees valid RESET output logic down to 0.6 V VDD, as specified by the V(POR) parameter in Section 7.5 of the SBVS193D datasheet. Below 0.6 V, the RESET output state is undefined and must not be relied upon for system control.

How does the TPS3839L30DQNT achieve 150 nA typical supply current while maintaining accurate voltage monitoring?

The TPS3839L30DQNT 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 method is validated in Figure 2 (Supply Current vs Temperature) of the SBVS193D datasheet and requires a 0.1 µF bypass capacitor to suppress sampling-induced voltage droop.

Is the TPS3839L30DQNT compatible with 1.8 V microcontroller reset inputs?

Yes, the TPS3839L30DQNT is compatible with 1.8 V microcontrollers. Its RESET output is push-pull and guarantees VOL ≤ 0.4 V at IOL = 0.5 mA (for VDD ≥ 1.2 V), ensuring solid logic-low assertion. VOH reaches VDD – 0.4 V, so at 1.8 V VDD, VOH ≥ 1.4 V - sufficient to meet typical 1.8 V CMOS VIH (≥ 0.7 × VDD = 1.26 V).