Texas Instruments TPS3837E18QDBVRQ1

Overview

TPS3837E18QDBVRQ1 from Texas Instruments is an automotive-grade nanosupervisory circuit providing precision 1.71 V supply voltage monitoring, active-high push-pull RESET output, and selectable 10 ms / 200 ms power-on reset delay via CT pin configuration. It operates from −40°C to 125°C in a 5-pin SOT-23 package and draws only 220 nA typical supply current, enabling use in battery-powered automotive microcontrollers and low-power DSPs.

For engineers reviewing the TPS3837E18QDBVRQ1 datasheet, TPS3837E18QDBVRQ1 pinout, TPS3837E18QDBVRQ1 application, or TPS3837E18QDBVRQ1 equivalent, key selection considerations include its fixed 1.71 V threshold, CT-selectable delay timing, active-high RESET logic, automotive AEC-Q100 qualification, and compatibility with 1.6–6 V supply rails in space-constrained embedded systems.

Technical Context

The TPS3837E18QDBVRQ1 integrates a precision bandgap reference, internal hysteresis (30 mV), and a refresh timer to ensure reliable power-on and brownout detection. Its RESET assertion begins when VDD exceeds 1.1 V, and remains active until VDD rises above 1.71 V and sustains for the selected delay period (10 ms or 200 ms).

Manual reset (MR) input supports asynchronous system reset with 1 µs minimum pulse width; CT pin configures delay by grounding (10 ms typ) or tying to VDD (200 ms typ). The active-high push-pull output drives up to 5 mA sink/source while maintaining VOL ≤ 0.4 V at IOL = 2 mA and VOH ≥ 0.8 × VDD at IOH = −2 mA.

Key Specifications

Pinout & Package

TPS3837E18QDBVRQ1 uses a 5-pin SOT-23 (DBV) package with 1.45 mm max height, 0.95 mm pin pitch, and exposed pad not present. Pin 1 (CT) is located in quadrant Q3 per tape-and-reel orientation standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3836E18QDBVRQ1 and TPS3838E18QDBVRQ1, the TPS3837E18QDBVRQ1 uniquely delivers active-high push-pull RESET without external components-reducing BOM cost, PCB area, and design complexity in 1.8 V automotive microcontroller applications.

Availability

TPS3837E18QDBVRQ1 is available at Aetrix Electronics and suitable for automotive ECU power monitoring, ADAS camera module supervision, telematics battery backup, and infotainment microcontroller reset applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3837E18QDBVRQ1 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 power management, signal chain, and automotive ICs.

The TPS3837-Q1 family is designed specifically for automotive power-supply supervision in safety-critical and low-power systems, targeting microcontroller, DSP, and SoC reset coordination under harsh thermal and electrical conditions.

FAQ

What is the exact reset threshold voltage of the TPS3837E18QDBVRQ1?

The TPS3837E18QDBVRQ1 has a nominal reset threshold voltage of 1.71 V, with a guaranteed range of 1.64 V to 1.76 V over −40°C to 125°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the SGLS141A datasheet. The threshold applies to both power-on and brownout detection events and includes 30 mV hysteresis to prevent false triggering during supply fluctuations.

How does the CT pin configure the reset delay time on the TPS3837E18QDBVRQ1?

The CT pin on the TPS3837E18QDBVRQ1 selects between two factory-set delay times: connecting CT to GND yields a typical 10 ms delay, while connecting CT to VDD yields a typical 200 ms delay. No external capacitor is required. The delay starts after VDD rises above the 1.71 V threshold and is implemented via an internal timer-ensuring consistent timing independent of external component tolerances or temperature drift.

Is the TPS3837E18QDBVRQ1 pin-compatible with other members of the TPS383x-Q1 family?

Yes, the TPS3837E18QDBVRQ1 shares identical 5-pin SOT-23 (DBV) packaging, pinout, and footprint with TPS3836E18QDBVRQ1 and TPS3838E18QDBVRQ1. All three variants have identical CT, GND, MR, VDD, and RESET pin assignments. However, their RESET output logic differs (active-high push-pull vs. active-low push-pull vs. active-low open-drain), so functional substitution requires verification of downstream interface requirements.

What is the maximum supply voltage rating for the TPS3837E18QDBVRQ1?

The absolute maximum supply voltage (VDD) for the TPS3837E18QDBVRQ1 is 7 V, as stated in the Absolute Maximum Ratings table. For reliable continuous operation, TI specifies a recommended maximum of 6 V under normal conditions. Exceeding 6 V is permitted only for short durations (≤1000 hours total), and operation at 7 V must be strictly limited to transient fault conditions-not steady-state use.

Does the TPS3837E18QDBVRQ1 require an external pull-up resistor on the RESET pin?

No, the TPS3837E18QDBVRQ1 does not require an external pull-up resistor on the RESET pin because it features an active-high push-pull output stage. This internal driver can source and sink current (±5 mA), allowing direct connection to MCU reset inputs without additional components. Using an external pull-up would create contention and is explicitly discouraged in the datasheet's application guidance.