Texas Instruments TPS389030DSET

Overview

TPS389030DSET from Texas Instruments is a precision voltage supervisor IC designed for system power-rail monitoring and reset generation in space-constrained, low-power applications. It features a fixed 3.0 V nominal threshold (VITN = 2.89 V), ±1% accuracy over –40°C to +125°C, 2.1 µA typical quiescent current, open-drain RESET output, and user-programmable delay (40 µs to 30 s) via external CT capacitor. It is used to ensure reliable power-on reset for microcontrollers and FPGAs during 3.0 V rail startup and brownout conditions.

For engineers reviewing the TPS389030DSET datasheet, TPS389030DSET pinout, TPS389030DSET application, or TPS389030DSET equivalent, this page delivers verified technical context, validated pin functions, confirmed timing and accuracy specs, real-world use cases in battery-powered and industrial systems, and two rigorously cross-checked alternative parts with documented functional differences.

Technical Context

The TPS389030DSET implements a precision bandgap-based voltage comparator with built-in hysteresis (0.325–0.825%) and a programmable RC timer circuit tied to the CT pin. Its SENSE input monitors voltages up to 5.5 V independently of VDD (1.5–5.5 V), enabling direct connection to 3.0 V rails without level shifting.

It operates in three functional modes: undefined below VPOR (0.8 V), asserted during undervoltage lockout (VPOR < VDD < 1.5 V), and fully active above VDD(min) = 1.5 V - where RESET assertion depends on SENSE falling below VITN = 2.89 V or MR being pulled low, with deassertion delayed by the CT-set time after both conditions clear.

Key Specifications

Pinout & Package

TPS389030DSET is housed in a 1.5-mm × 1.5-mm, 6-pin WSON (DSE) package with wettable flanks, optimized for automated optical inspection and high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS389030DSET, TPS389730DSER adds watchdog capability at higher quiescent current and cost, while MAX6373UT30+T sacrifices MR and delay programmability for smaller size and lower price - making TPS389030DSET the optimal balance of precision, flexibility, and ultra-low power for dynamic 3.0 V system supervision.

Availability

TPS389030DSET is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, portable medical devices, and smart energy metering requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS389030DSET 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 leader delivering analog, embedded processing, and connectivity solutions with deep expertise in power management and precision analog ICs.

The TPS3890 family was engineered specifically for ultra-low-power, high-accuracy voltage supervision in battery-operated and thermally demanding applications - emphasizing 1% threshold stability, sub-µA quiescent current, and field-programmable reset timing.

FAQ

What is the exact threshold voltage and accuracy of the TPS389030DSET?

The TPS389030DSET has a factory-set negative threshold voltage (VITN) of 2.89 V and positive threshold (VITP) of 2.907 V, with maximum ±1% accuracy over –40°C to +125°C. This corresponds to ±29 mV tolerance at 2.89 V, verified per TI's SLVSD65A datasheet Section 7.5 and Device Comparison Table.

Does the TPS389030DSET support programmable reset delay, and how is it implemented?

Yes, the TPS389030DSET supports user-programmable reset delay from 40 µs to 30 s via an external capacitor on the CT pin. The internal 1.15 µA current source charges the capacitor to a 1.23 V threshold; delay time follows tPD(r) ≈ CCT × 1.07 + 25 µs. Ceramic capacitors are recommended to minimize leakage effects.

What is the operating voltage range for VDD and the SENSE input on the TPS389030DSET?

The TPS389030DSET accepts VDD from 1.5 V to 5.5 V and supports SENSE input voltages from 0 V to 5.5 V - independent of VDD. This allows direct monitoring of a 3.0 V rail even when powered from a different supply, such as a 1.8 V bias rail, without external level-shifting circuitry.

Is the RESET output of the TPS389030DSET push-pull or open-drain, and what pullup is required?

The RESET output of the TPS389030DSET is open-drain. A pullup resistor between 10 kΩ and 1 MΩ must be connected from RESET to the target interface voltage (≤5.5 V). TI recommends 100 kΩ for general use; the value balances speed, power, and noise immunity based on bus capacitance and VOL requirements.

Can the TPS389030DSET be used in automotive applications, and what is its temperature qualification?

Yes, the TPS389030DSET is qualified for operation from –40°C to +125°C junction temperature and meets AEC-Q100 stress test requirements per TI's product documentation. Its 1% threshold accuracy, low IQ, and robust glitch immunity make it suitable for body control modules, ADAS power domains, and other under-hood automotive subsystems.