Texas Instruments TPS3808G01QDBVRQ1

Overview

TPS3808G01QDBVRQ1 from Texas Instruments is an automotive-grade programmable-delay supervisory circuit that monitors system voltages down to 0.405 V, delivers 0.5% threshold accuracy, supports 1.25 ms–10 s user-adjustable reset delay via external capacitor, and features open-drain RESET output with 2.4 μA typical quiescent current - used for power-on reset in automotive radar and DSP subsystems.

For engineers reviewing the TPS3808G01QDBVRQ1 datasheet, TPS3808G01QDBVRQ1 pinout, TPS3808G01QDBVRQ1 application, or TPS3808G01QDBVRQ1 equivalent, key selection criteria include adjustable low-voltage sensing (≥0.405 V), AEC-Q100 qualification, SOT-23-6 packaging, CT-pin-based delay programming, and manual reset (MR) input compatibility with microcontroller GPIOs.

Technical Context

The TPS3808G01QDBVRQ1 implements a precision voltage comparator with internal 0.405 V reference and 1.5–3% hysteresis, enabling stable monitoring of sub-1 V rails such as VCORE or I/O supplies. Its reset assertion logic responds to either SENSE voltage drop below VIT or MR pin pull-down, with deassertion delayed by an on-chip 220 nA current source charging an external CT capacitor.

It operates across –40°C to +125°C, accepts 1.8–6.5 V supply, and uses internal 90 kΩ MR pullup and <25 nA SENSE input bias current - ensuring minimal loading on monitored rails and compatibility with high-impedance divider networks for custom threshold setting.

Key Specifications

Pinout & Package

SOT-23-6 package (2.90 mm × 1.60 mm body), surface-mount, lead-free, RoHS-compliant, with exposed thermal pad not connected in DBV variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G12QDBVRQ1 and MAX6375US29D3+T, the TPS3808G01QDBVRQ1 uniquely supports sub-0.5 V monitoring with full delay programmability and automotive qualification - making it the sole choice for next-gen low-voltage ADAS SoCs requiring precise, configurable reset behavior.

Availability

TPS3808G01QDBVRQ1 is available at Aetrix Electronics and suitable for automotive radar, ADAS domain controllers, and DSP-based telematics units requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for TPS3808G01QDBVRQ1 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 automotive, industrial, and personal electronics markets.

The TPS3808Gxx-Q1 product line delivers AEC-Q100-qualified supervisory circuits optimized for automotive power sequencing, featuring ultra-low IQ, high-accuracy thresholds, and flexible delay programming for radar, vision, and domain controller applications.

FAQ

What is the minimum detectable voltage threshold for TPS3808G01QDBVRQ1?

The TPS3808G01QDBVRQ1 has a nominal internal reference of 0.405 V, enabling it to monitor system voltages as low as 0.405 V directly - or lower via external resistor divider. When used with R1/R2 network, the effective threshold is calculated as VIT = (1 + R1/R2) × 0.405 V, allowing precise setting for rails like 0.5 V or 0.6 V. This capability is unique to the TPS3808G01QDBVRQ1 within the family and is confirmed in the device comparison table and Figure 10 of the SBVS085J datasheet.

How is the reset delay time configured on TPS3808G01QDBVRQ1?

The reset delay on TPS3808G01QDBVRQ1 is configured via the CT pin: leaving CT open yields ~20 ms delay; connecting CT to VDD through a 40–200 kΩ resistor gives ~300 ms; connecting CT to GND via capacitor (≥100 pF) enables user-programmable delay from 1.25 ms to 10 s. The delay is generated by an internal 220 nA current source charging the capacitor to 1.23 V. Equation 1 in the datasheet (Delay (s) = CT (nF) × 10⁻⁹ × 175 − 0.5 × 10⁻³) applies for accurate sizing - verified in Section 8.3.4 and Figure 13.

Is TPS3808G01QDBVRQ1 compatible with 1.8 V supply operation?

Yes, TPS3808G01QDBVRQ1 operates with VDD from 1.8 V to 6.5 V per Recommended Operating Conditions (Section 7.3). At 1.8 V, it maintains full functionality: SENSE input accepts 0–VDD range, MR logic thresholds scale to 0.3×VDD/0.7×VDD, and RESET output VOL remains ≤0.3 V (IOL = 0.4 mA). Electrical Characteristics Table (Section 7.5) confirms IDD = 2.4 μA typical and VIT accuracy holds - making it suitable for low-voltage automotive modules powered from 1.8 V LDOs.

Does TPS3808G01QDBVRQ1 require an external pullup resistor on the RESET pin?

Yes, TPS3808G01QDBVRQ1 features an open-drain RESET output and requires an external pullup resistor (10 kΩ to 1 MΩ) to define the logic-high voltage level and sink current during assertion. The pullup may connect to VDD or a higher rail (e.g., 5 V) since RESET is not clamped - enabling level translation. This requirement is explicitly stated in Pin Functions (Section 6) and Figure 14/15 typical applications, and omission causes undefined reset state during deassertion.

What automotive qualification does TPS3808G01QDBVRQ1 meet?

TPS3808G01QDBVRQ1 is qualified per AEC-Q100 Grade 1, covering operating temperature (–40°C to +125°C), reliability testing (HTOL, TC, UHAST), ESD (HBM ±2000 V, CDM ±500 V), and manufacturing flow controls. This is documented in the Features section, Device Information table, and ESD Ratings (Section 7.2) of SBVS085J. The "-Q1" suffix denotes full automotive qualification - distinct from commercial versions - and applies to both SOT-23 (DBV) and WSON (DRV) packages.