Texas Instruments TPS3806I33QDBVRQ1

Overview

TPS3806I33QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive dual voltage detector IC with independent open-drain RESET and RSTSENSE outputs, fixed 3.0-V VDD threshold (±22 mV), adjustable LSENSE threshold (1.207 V nominal), and programmable hysteresis via HSENSE input. It asserts reset at VDD ≥ 0.8 V and operates from 1.3 V to 6 V supply, targeting battery voltage supervision in Li-ion-powered automotive modules.

For engineers reviewing the TPS3806I33QDBVRQ1 datasheet, TPS3806I33QDBVRQ1 pinout, TPS3806I33QDBVRQ1 application, or TPS3806I33QDBVRQ1 equivalent, this page delivers verified functional identity, terminal roles, hysteresis configuration logic, automotive-grade thermal and ESD specs, and real-world battery monitoring use cases - all grounded in TI's SLVSBW8A datasheet.

Technical Context

The TPS3806I33QDBVRQ1 integrates two independent comparators: one monitors VDD against a fixed internal 3.0-V threshold (VIT,VDD), while the other monitors LSENSE against a precision 1.207-V reference. Hysteresis is set externally via resistor divider on HSENSE, enabling user-defined window thresholds (60–90 mV typical). Both outputs are active-low open-drain MOSFETs requiring external pullups.

Operation begins at VDD ≥ 0.8 V, ensuring guaranteed reset assertion during power-up. The device draws only 3 µA typical at 3.3 V and supports full automotive temperature range (–40°C to 125°C) with AEC-Q100 H2/C4B ESD ratings. Propagation delays are ≤100 µs with 5.5-µs minimum pulse width support.

Key Specifications

Pinout & Package

TPS3806I33QDBVRQ1 is housed in a 6-pin SOT-23 (DBV) package, 2.9 mm × 1.6 mm × 1.45 mm, with gull-wing leads and RoHS-compliant NiPdAu finish (MSL Level-1).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-voltage supervisor applications.

Compared with TPS3806I33QDBVRQ1, both alternatives lack the integrated dual-sense architecture and programmable hysteresis - making them unsuitable for automotive battery + system voltage co-monitoring without added components and layout complexity.

Availability

TPS3806I33QDBVRQ1 is available at Aetrix Electronics and suitable for automotive ECU power sequencing, ADAS camera module supervision, and body control module battery backup applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3806I33QDBVRQ1 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 TPS3806 family is designed specifically for automotive-grade dual-rail voltage supervision - combining precision threshold detection, hysteresis configurability, and ultra-low power to meet stringent AEC-Q100 requirements in safety-critical systems.

FAQ

What is the exact threshold voltage for VDD monitoring in the TPS3806I33QDBVRQ1?

The TPS3806I33QDBVRQ1 features a fixed VDD threshold of 3.000 V with ±22 mV tolerance over –40°C to 125°C ambient temperature. This value is factory-trimmed and specified in the Electrical Characteristics table of the SLVSBW8A datasheet. The threshold is referenced internally and does not require external components - ensuring consistent brownout detection for 3.3-V systems without calibration.

How does the HSENSE pin configure hysteresis for the LSENSE channel in the TPS3806I33QDBVRQ1?

In the TPS3806I33QDBVRQ1, the HSENSE pin accepts a voltage divider output that sets the upper trip point for the LSENSE comparator. When LSENSE rises above its 1.207-V threshold, the device waits until HSENSE voltage exceeds the same reference before releasing RSTSENSE - creating a user-defined hysteresis window (60–90 mV typical). This prevents output chatter during slow-rising or noisy battery voltages.

Is the TPS3806I33QDBVRQ1 pin-compatible with other devices in the TPS3806 family?

No - the TPS3806I33QDBVRQ1 is not pin-compatible with other TPS3806 variants such as TPS3806K33 or TPS3806I50. While all share the DBV package and 6-pin SOT-23 footprint, pin functions differ: for example, TPS3806K33 uses Pin 6 as GND instead of HSENSE. Always verify terminal functions using Table 2 in the SLVSBW8A datasheet before board reuse.

What is the minimum supply voltage required to guarantee reset assertion in the TPS3806I33QDBVRQ1?

The TPS3806I33QDBVRQ1 guarantees RESET and RSTSENSE assertion at VDD ≥ 0.8 V, as confirmed in the Features and Electrical Characteristics sections of the SLVSBW8A datasheet. This ensures reliable power-on reset initiation even with severely depleted batteries - a critical requirement for automotive cold-crank scenarios where battery voltage may dip below 6 V.

Does the TPS3806I33QDBVRQ1 support operation down to –40°C, and what qualification standard applies?

Yes - the TPS3806I33QDBVRQ1 is fully specified and qualified for operation from –40°C to 125°C ambient temperature per AEC-Q100 Grade 1 requirements. This includes validation of electrical parameters, thermal performance (θJA = 188.9°C/W), and ESD robustness (HBM 2 kV, CDM 750 V), making it suitable for under-hood and cabin-mounted automotive electronics.