Texas Instruments TPS3838L30QDBVRQ1

Overview

TPS3838L30QDBVRQ1 from Texas Instruments is an automotive-grade nanosupervisory circuit with open-drain active-low RESET output, 2.64 V threshold voltage, 220 nA typical supply current, −40°C to 125°C operating range, and selectable 10 ms / 200 ms reset delay via CT pin - used for reliable power-on reset in battery-powered automotive microcontrollers and low-power DSPs.

For engineers reviewing the TPS3838L30QDBVRQ1 datasheet, TPS3838L30QDBVRQ1 pinout, TPS3838L30QDBVRQ1 application, or TPS3838L30QDBVRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, open-drain output architecture, precise 2.64 V supervision level, ultra-low quiescent current, and SOT-23-5 automotive packaging.

Technical Context

This device implements a precision band-gap reference and internal timer-based reset generator. It asserts RESET when VDD rises above 1.1 V at power-up, then monitors VDD against a fixed 2.64 V threshold (VIT) with 40 mV hysteresis. The CT pin selects between 10 ms (CT = GND) or 200 ms (CT = VDD) delay before RESET deassertion after VDD exceeds VIT.

It features manual reset (MR) input with internal 30 kΩ pullup, supports VDD from 1.6 V to 6 V, and guarantees low-level output voltage ≤0.4 V at 2 mA sink current. Its open-drain RESET output enables wired-OR configurations and compatibility with diverse logic families.

Key Specifications

Pinout & Package

TPS3838L30QDBVRQ1 is housed in a 5-pin SOT-23 (DBV) package, 2.9 mm × 1.6 mm × 1.15 mm, RoHS-compliant and green (no Sb/Br), moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3838K33QDBVRQ1, TPS3838L30QDBVRQ1 provides tighter match to 2.7 V rails; compared with TLV803EB30DBVR, it delivers 42% lower quiescent current and configurable timing - critical for automotive always-on modules.

Availability

TPS3838L30QDBVRQ1 is available at Aetrix Electronics and suitable for automotive engine control units, body electronics modules, and telematics systems requiring stable component supply with AEC-Q100 traceability and long-term lifecycle support.

Supply support for TPS3838L30QDBVRQ1 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 for automotive, industrial, and consumer markets.

The TPS3838-Q1 product line delivers nanopower, AEC-Q100–qualified supervisory circuits optimized for automotive microcontroller and DSP power sequencing with precision thresholds and configurable reset timing.

FAQ

What is the exact reset threshold voltage of TPS3838L30QDBVRQ1?

The TPS3838L30QDBVRQ1 has a nominal reset threshold voltage of 2.64 V, with a guaranteed range of 2.54 V to 2.71 V over temperature and process variation. This value is factory-trimmed and specified in the electrical characteristics table under "Negative-going input threshold voltage (VIT)" for the L30 variant. The 40 mV hysteresis prevents oscillation during slow-rising or noisy supply transitions.

Does TPS3838L30QDBVRQ1 support manual reset functionality?

Yes, TPS3838L30QDBVRQ1 includes a dedicated MR (Manual Reset) pin (Pin 3) that provides asynchronous active-low reset triggering. When pulled low, it forces RESET to assert regardless of VDD level. An internal 30 kΩ pullup resistor connects MR to VDD, so the pin can be left floating or tied to VDD if manual reset is unused - minimizing current consumption.

How is the reset delay time selected on TPS3838L30QDBVRQ1?

The reset delay time on TPS3838L30QDBVRQ1 is selected using the CT pin (Pin 1): connect CT to GND for a typical 10 ms delay, or to VDD for a typical 200 ms delay. This configuration occurs after VDD rises above the 2.64 V threshold and determines how long RESET remains asserted before releasing. No external components are needed.

Is TPS3838L30QDBVRQ1 qualified for automotive applications?

Yes, TPS3838L30QDBVRQ1 is explicitly qualified for automotive use per AEC-Q100 Grade 1 (−40°C to 125°C ambient), features customer-specific configuration control, and carries the "Q1" suffix denoting automotive qualification. It is packaged in a green (RoHS & no Sb/Br), moisture-sensitive level 1 SOT-23-5 (DBV) package with CU NIPDAU finish.

What output type does TPS3838L30QDBVRQ1 provide?

TPS3838L30QDBVRQ1 provides an active-low open-drain RESET output (Pin 5). This architecture requires an external pullup resistor to the desired logic voltage (e.g., 1.8 V, 3.3 V, or 5 V) and enables wired-OR connections with other reset sources - essential for complex automotive power architectures with multiple supervisory devices.