Texas Instruments TPS3808EG09DBVRQ1

Overview

TPS3808EG09DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade microprocessor supervisory circuit that monitors 0.9V power rails with ±0.5% threshold accuracy, asserts an open-drain RESET signal on undervoltage or manual reset, and supports user-programmable delay from 1.25ms to 150s - deployed in ADAS domain controllers for reliable power-on sequencing.

For engineers reviewing the TPS3808EG09DBVRQ1 datasheet, TPS3808EG09DBVRQ1 pinout, TPS3808EG09DBVRQ1 application, or TPS3808EG09DBVRQ1 equivalent, key selection criteria include its 0.6μA quiescent current, SOT-23-6 package (2.9mm × 1.6mm), –40°C to +125°C operating range, fixed 0.84V undervoltage threshold, and CT-pin programmable reset timing for battery-sensitive automotive subsystems.

Technical Context

The TPS3808EG09DBVRQ1 uses a precision internal reference to achieve ±0.5% voltage threshold accuracy and incorporates hysteresis (1–2.5%) to prevent chatter during threshold crossings. Its reset assertion logic responds to either SENSE voltage falling below 0.84V or MR pin driven low, with propagation delay under 500ns.

Reset deassertion requires both SENSE > 0.84V + VHYS and MR high, followed by a user-defined delay set via CT pin: open (20ms), resistor-to-VDD (300ms), or capacitor-to-GND (1.25ms–150s). The open-drain RESET output requires an external pull-up and supports voltages up to 6V independent of VDD.

Key Specifications

Pinout & Package

TPS3808EG09DBVRQ1 is housed in a 6-pin SOT-23 package (2.9mm × 1.6mm), optimized for space-constrained automotive PCBs and qualified for reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808EG09DBVRQ1, the TPS3808G01DBVRQ1 offers design flexibility at the expense of added components, while the MAX6373KATA+T trades programmability and precision for lower unit cost in less demanding environments.

Availability

TPS3808EG09DBVRQ1 is available at Aetrix Electronics and suitable for ADAS domain controllers, automotive gateways, and digital cockpit processing units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3808EG09DBVRQ1 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, with over 90 years of innovation in power management, signal chain, and automotive electronics.

The TPS3808E-Q1 product line delivers ultra-low-power, AEC-Q100-qualified supervisory circuits specifically engineered for automotive power-rail monitoring in safety-critical ECUs, ADAS, and infotainment systems.

FAQ

What is the exact undervoltage threshold voltage of the TPS3808EG09DBVRQ1?

The TPS3808EG09DBVRQ1 has a nominal undervoltage threshold of 0.84V with ±0.5% accuracy over –40°C to +125°C. This corresponds to reliable supervision of a 0.9V nominal power rail, and the value is factory-trimmed - no external components are needed to achieve this precision. The TPS3808EG09DBVRQ1 datasheet specifies V_IT-(UV) = 0.84V (typical) with tight tolerance maintained across temperature and supply voltage variations.

How is the reset delay time configured on the TPS3808EG09DBVRQ1?

The TPS3808EG09DBVRQ1 reset delay is set via the CT pin: leaving it open yields 20ms, connecting it to VDD through a 40kΩ–200kΩ resistor gives 300ms, and connecting it to GND via a capacitor (≥130pF) enables user-programmable delays from 1.25ms to 150s. The TPS3808EG09DBVRQ1 uses an internal 220nA current source to charge the capacitor, and the delay is calculated as t_D(s) = (C_T(nF) × 175) – 0.5 × 10⁻³.

Does the TPS3808EG09DBVRQ1 support manual reset functionality?

Yes, the TPS3808EG09DBVRQ1 includes a dedicated MR (manual reset) input pin that asserts RESET when driven to ≤0.3×VDD. The MR pin features an internal 90kΩ pull-up to VDD, allowing it to remain unconnected if unused. When asserted, MR overrides SENSE monitoring and forces RESET low immediately - a feature used in TPS3808EG09DBVRQ1 designs for processor-initiated warm resets or fault recovery sequences.

What package type and dimensions does the TPS3808EG09DBVRQ1 use?

The TPS3808EG09DBVRQ1 is packaged in a 6-pin SOT-23 (DBV) case measuring 2.90mm × 1.60mm (nominal body size), with standard JEDEC-compliant footprint and thermal characteristics (R_θJA = 210.8°C/W). This compact, surface-mount package supports automated assembly and meets AEC-Q100 mechanical stress requirements for automotive vibration and thermal cycling.

Is the TPS3808EG09DBVRQ1 compatible with 3.3V and 5V systems?

Yes, the TPS3808EG09DBVRQ1 operates from 1.7V to 6V on VDD and accepts SENSE inputs up to 6V, making it fully compatible with 3.3V and 5V systems. Its 0.84V threshold is optimized for 0.9V rails, but the device itself can be powered from higher supplies - e.g., VDD = 3.3V while monitoring a 0.9V core rail via SENSE, with RESET pulled up to 5V for interfacing with legacy microcontrollers.