Texas Instruments TPS389030DSER

Overview

TPS389030DSER 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, VITP = 2.907 V), ±1% accuracy over –40°C to +125°C, 2.1 µA typical quiescent current, and user-programmable reset delay (40 µs to 30 s via external CT capacitor). It is used to ensure reliable power-on reset for microcontrollers operating from 3.0 V rails.

For engineers reviewing the TPS389030DSER datasheet, TPS389030DSER pinout, TPS389030DSER application, or TPS389030DSER equivalent, key selection criteria include its 1.5-mm × 1.5-mm WSON-6 package, open-drain RESET output with 0.25 V VOL at 0.4 mA, manual reset (MR) input compatibility, and guaranteed operation down to 1.5 V supply voltage.

Technical Context

The TPS389030DSER implements a precision bandgap reference and comparator architecture to achieve ±1% threshold accuracy across temperature. Its internal CT pin current source (1.15 µA typ.) charges an external capacitor to set the rising-edge reset delay, while hysteresis (0.325–0.825%) ensures noise-immune state transitions on the SENSE input.

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. The MR input provides asynchronous reset control independent of SENSE voltage, and RESET remains asserted until both MR and SENSE exceed their respective thresholds plus the programmed delay.

Key Specifications

Pinout & Package

TPS389030DSER is housed in a 1.5-mm × 1.5-mm, 6-pin WSON package with wettable flanks, optimized for automated optical inspection (AOI) and thermal performance in high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS389730DSER and MAX6326UT30+T, the TPS389030DSER uniquely balances ultra-low IQ, full programmability (delay + MR), and industrial-grade accuracy in the smallest possible footprint-making it optimal for battery-powered and thermally constrained systems where supervision fidelity cannot be compromised.

Availability

TPS389030DSER is available at Aetrix Electronics and suitable for microcontroller power sequencing, FPGA configuration monitoring, solid-state drive power management, and automotive body control modules requiring stable component supply across extended temperature ranges.

Supply support for TPS389030DSER 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TPS3890 family was engineered specifically for ultra-low-power, high-accuracy voltage supervision in space-constrained embedded systems-emphasizing long battery life, wide temperature operation, and flexible reset timing without firmware dependency.

FAQ

What is the exact threshold voltage specification for TPS389030DSER?

The TPS389030DSER has a fixed negative threshold voltage (VITN) of 2.89 V and positive threshold voltage (VITP) of 2.907 V, with ±1% maximum accuracy over –40°C to +125°C. These values correspond to a nominal 3.0 V supply rail and are factory-trimmed; no external resistor network is required for 3.0 V monitoring. The device achieves this accuracy using an internal precision bandgap reference and laser-trimmed comparator offsets.

Can TPS389030DSER monitor a voltage rail higher than its VDD supply?

Yes, the TPS389030DSER can monitor supply rails up to 5.5 V on its SENSE pin even when powered from a lower VDD (minimum 1.5 V). This is enabled by its high-impedance, rail-to-rail input stage and internal level-shifting circuitry. For example, it can supervise a 3.3 V or 5.0 V rail while being powered from a 1.8 V auxiliary supply, making it ideal for mixed-voltage systems where supervisor supply and monitored rail differ.

How is the reset delay time calculated for TPS389030DSER?

The rising-edge reset delay (tPD(r)) of TPS389030DSER is calculated using tPD(r) = CCT × VCT ÷ ICT + tPD(r)(nom), where CCT is the external CT capacitor value in farads, VCT = 1.23 V (typical comparator threshold), ICT = 1.15 µA (typical charging current), and tPD(r)(nom) = 25 µs. For instance, a 100 nF capacitor yields ~108 ms delay. The formula accounts for process variation, and TI recommends using low-leakage ceramic capacitors to maintain accuracy across temperature.

Does TPS389030DSER require an external pullup resistor on the RESET pin?

Yes, TPS389030DSER features an open-drain RESET output and requires an external pullup resistor between RESET and the target logic rail (up to 5.5 V). Recommended values range from 10 kΩ to 1 MΩ depending on rise-time and bus capacitance requirements. A 100 kΩ resistor is typical for general-purpose use, balancing speed and current consumption; lower values improve rise time but increase static current when RESET is asserted.

What is the operating temperature range and thermal performance of TPS389030DSER?

The TPS389030DSER is fully specified from –40°C to +125°C junction temperature and uses a WSON-6 package with RθJA = 321.3°C/W. Its thermal design supports operation in sealed enclosures and under continuous load without derating, validated by TI's characterization across temperature. The device maintains ±1% threshold accuracy and 2.1 µA typical IQ across this full range, meeting requirements for industrial automation and under-hood automotive applications.