Texas Instruments TPS386000QRGPRQ1

Overview

TPS386000QRGPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified quad supply voltage supervisor with programmable delay and watchdog timer. It monitors four positive rails ≥0.4 V and one rail <0.4 V (including negative), delivers five open-drain reset outputs (RESET1–RESET4, WDO), features 0.25% typical threshold accuracy, 12 μA typical quiescent current, and operates from –40°C to +125°C ambient. It is used in ADAS front camera and radar power sequencing.

For engineers reviewing the TPS386000QRGPRQ1 datasheet, TPS386000QRGPRQ1 pinout, TPS386000QRGPRQ1 application, or TPS386000QRGPRQ1 equivalent, key selection criteria include SVS-4 window-comparator capability, VREF-based negative-rail monitoring, MR input on SVS-1, and CTn-programmable delays from 1.4 ms to 10 s across all four supervisory channels.

Technical Context

The TPS386000QRGPRQ1 integrates four independent supervisory circuits (SVS-1 to SVS-4) on a single silicon platform. Each SVS channel uses precision comparators with 0.25% typical threshold accuracy and programmable hysteresis (3.5–10 mV). SVS-1 includes a dedicated manual reset (MR) input and supports fixed or capacitor-programmed delay via CT1.

SVS-4 implements a dual-comparator window monitor using SENSE4L (falling-edge) and SENSE4H (rising-edge), enabling both overvoltage and undervoltage detection - or, when combined with VREF (1.20 V), negative-rail supervision. The integrated watchdog timer triggers on WDI edges every 610 ms (typical) and asserts WDO on timeout.

Key Specifications

Pinout & Package

TPS386000QRGPRQ1 is housed in a 4-mm × 4-mm, 20-pin VQFN package (RGP) with exposed thermal pad. Pin numbering follows top-view layout; thermal pad must be connected to GND for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-voltage supervision applications.

Compared with TPS386000QRGPRQ1, the TPS386001QRGPRQ1 sacrifices programmable delay for reduced external component count, while the MAX6816GWE+T omits watchdog, VREF, and automotive qualification - making neither a drop-in replacement for AEC-Q100 ADAS use cases requiring precision, flexibility, and functional safety support.

Availability

TPS386000QRGPRQ1 is available at Aetrix Electronics and suitable for automotive ADAS, front camera systems, and long-range radar modules requiring stable component supply, full AEC-Q100 compliance, and long-term production continuity.

Supply support for TPS386000QRGPRQ1 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 specializing in analog, embedded processing, and automotive ICs, with decades of automotive qualification expertise and broad manufacturing scale.

The TPS386000-Q1 product line was engineered specifically for ASIL-B-capable power supervision in advanced driver-assistance systems, delivering multi-rail monitoring, watchdog safety, and precision thresholding in compact VQFN packaging.

FAQ

What is the minimum VDD voltage required for TPS386000QRGPRQ1 to assert valid RESET outputs?

The TPS386000QRGPRQ1 guarantees functional RESETn behavior above 0.9 V VDD. Below this, outputs may not meet VOL or timing specs. Power-up reset voltage is specified at 0.9 V (min), ensuring reliable initialization even during slow-ramp battery conditions common in automotive cold-crank scenarios. TPS386000QRGPRQ1 remains powered and functional down to 1.8 V nominal operation.

Can TPS386000QRGPRQ1 monitor a –1.2 V rail, and how is it configured?

Yes, TPS386000QRGPRQ1 can monitor negative rails using SENSE4H and VREF. Connect VREF (1.20 V) to the negative rail via a resistor divider so that SENSE4H sees a positive voltage proportional to the negative rail magnitude. For example, a –1.2 V rail referenced to GND yields 0 V at SENSE4H when properly biased - enabling accurate undervoltage detection. TPS386000QRGPRQ1's VREF is designed solely for sourcing current into such networks.

How does the watchdog timer in TPS386000QRGPRQ1 interact with the reset channels?

The TPS386000QRGPRQ1 watchdog timer starts counting upon release of RESET1 (or RESET1) and resets on each WDI edge. Timeout (600 ms typ) asserts WDO independently of SVS channels. WDO does not affect RESETn outputs unless externally wired to MR or another controller input. This separation ensures fault isolation: processor lockup triggers WDO without disturbing power-rail supervision states managed by TPS386000QRGPRQ1's four SVS blocks.

What is the maximum recommended pull-up resistance for RESETn outputs of TPS386000QRGPRQ1?

The datasheet specifies a minimum pull-up resistance of 10 kΩ for RESETn outputs to ensure safe transistor operation and avoid excessive sink current. While higher values (e.g., 100 kΩ) reduce power consumption, they increase susceptibility to noise and slow rise times - especially with >50 pF node capacitance. For automotive environments, 47 kΩ is commonly used to balance noise immunity, speed, and current draw. All pull-ups must connect to a rail ≤6.5 V compatible with TPS386000QRGPRQ1's VDD range.

Does TPS386000QRGPRQ1 support simultaneous assertion of multiple RESET outputs during a single fault event?

Yes, TPS386000QRGPRQ1 asserts RESETn outputs independently per monitored rail. If SENSE1 drops below threshold while SENSE2 remains valid, only RESET1 activates - no cross-channel coupling exists. However, all active RESETn outputs share the same open-drain topology, allowing wired-OR combination onto a single system reset bus. This enables hierarchical reset schemes where failure of any rail halts the entire subsystem, as implemented in TPS386000QRGPRQ1-based ADAS domain controllers.