Texas Instruments TPS3808EG15DBVRQ1

Overview

TPS3808EG15DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade microprocessor supervisory circuit that monitors 1.5V 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. It operates from –40°C to +125°C in a 6-pin SOT-23 package and delivers 0.6μA typical quiescent current for battery-sensitive ADAS domain controllers.

For engineers reviewing the TPS3808EG15DBVRQ1 datasheet, TPS3808EG15DBVRQ1 pinout, TPS3808EG15DBVRQ1 application, or TPS3808EG15DBVRQ1 equivalent, key selection criteria include its fixed 1.40V undervoltage threshold (1.5V nominal rail), CT-pin programmable reset timing, separate SENSE/VDD pins for accurate rail monitoring, and AEC-Q100 qualification for automotive safety-critical systems.

Technical Context

The TPS3808EG15DBVRQ1 uses an internal precision voltage reference and comparator with 1% typical threshold accuracy to detect SENSE voltage drops below 1.40V. Its reset assertion logic combines analog undervoltage detection and digital MR input handling, with hysteresis (1–2.5%) preventing chatter during threshold crossings.

Reset delay is controlled via the CT pin: open-circuit yields 20ms, resistor-to-VDD gives 300ms, and external capacitor (≥130pF) enables continuous adjustment from 1.25ms to 150s using a 220nA internal current source. The open-drain RESET output requires an external pull-up (10kΩ–1MΩ) and supports voltages up to 6V independent of VDD.

Key Specifications

Pinout & Package

TPS3808EG15DBVRQ1 is housed in a 6-pin SOT-23 package (2.90mm × 1.60mm) with gull-wing leads, optimized for high-density automotive PCB layouts and reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808EG15DBVRQ1, TPS3808G15QDBVRQ1 offers identical electrical performance with enhanced manufacturing traceability, while MAX6375HEUT+T trades programmability and ultra-low current for lower unit cost and simpler implementation in less demanding applications.

Availability

TPS3808EG15DBVRQ1 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 TPS3808EG15DBVRQ1 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 designing analog ICs, embedded processors, and automotive electronics with emphasis on reliability, precision, and safety-critical performance.

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

FAQ

What is the exact undervoltage threshold voltage of the TPS3808EG15DBVRQ1?

The TPS3808EG15DBVRQ1 has a nominal undervoltage threshold of 1.40V with ±0.5% accuracy over –40°C to +125°C. This value corresponds to monitoring a 1.5V nominal supply rail and is factory-trimmed; no external components are required to achieve this precision. The TPS3808EG15DBVRQ1 datasheet specifies this as VIT-(UV) in Section 6.5 Electrical Characteristics.

How is the reset delay time configured on the TPS3808EG15DBVRQ1?

The reset delay time on the TPS3808EG15DBVRQ1 is configured via the CT pin: leaving it open yields 20ms, connecting it to VDD through a 40kΩ–200kΩ resistor gives 300ms, and attaching a capacitor (≥130pF) to ground enables user-adjustable delays from 1.25ms to 150s. The TPS3808EG15DBVRQ1 uses an internal 220nA current source to charge the capacitor, and delay accuracy depends on capacitor tolerance and leakage.

Does the TPS3808EG15DBVRQ1 support monitoring multiple voltage rails?

The TPS3808EG15DBVRQ1 monitors one voltage rail via its dedicated SENSE pin, but multiple rails can be supervised using its MR input. For example, a second supervisor can drive the MR pin of the TPS3808EG15DBVRQ1 to assert RESET if its own monitored rail fails. This daisy-chained approach allows coordinated reset signaling across 1.5V, 3.3V, and 5V domains without modifying the TPS3808EG15DBVRQ1's core function.

What is the maximum supply voltage the TPS3808EG15DBVRQ1 can tolerate on its VDD pin?

The TPS3808EG15DBVRQ1 supports a VDD supply voltage range of 1.7V to 6V, with absolute maximum rating of 6.5V. Operation above 6V risks permanent damage per Section 6.1 Absolute Maximum Ratings. The TPS3808EG15DBVRQ1 maintains specified performance across this full range, enabling use with both post-regulated 3.3V supplies and unregulated automotive battery-derived inputs.

Is the TPS3808EG15DBVRQ1 pin-compatible with other members of the TPS3808E-Q1 family?

Yes, all TPS3808E-Q1 variants-including TPS3808EG15DBVRQ1-share identical 6-pin SOT-23 (DBV) packaging and pinout. This allows drop-in replacement across threshold voltages (e.g., TPS3808EG33DBVRQ1 for 3.3V rails) without PCB redesign. The TPS3808EG15DBVRQ1 retains identical CT, MR, RESET, SENSE, VDD, and GND terminal assignments and electrical drive characteristics.