Texas Instruments TPS3808G01QDRVRQ1

Overview

TPS3808G01QDRVRQ1 from Texas Instruments is an automotive-grade, low-quiescent-current programmable-delay supervisory circuit in a 6-pin WSON package. It monitors system voltages down to 0.405 V via the SENSE pin, asserts an open-drain RESET signal on threshold violation or MR assertion, and supports user-adjustable delay from 1.25 ms to 10 s via external capacitor on CT. It is used in automotive radar and vision systems requiring precise power-on reset with high threshold accuracy (±0.5%) and operation up to +125°C.

For engineers reviewing the TPS3808G01QDRVRQ1 datasheet, TPS3808G01QDRVRQ1 pinout, TPS3808G01QDRVRQ1 application, or TPS3808G01QDRVRQ1 equivalent, key selection criteria include its adjustable 0.405-V threshold, 2.4-μA typical quiescent current, ±0.5% VIT accuracy at ≤3.3 V, –40°C to +125°C AEC-Q100 qualification, and WSON thermal-pad package for automotive PCB reliability.

Technical Context

The TPS3808G01QDRVRQ1 implements a precision voltage comparator with internal 0.405-V reference and 1.5–3% hysteresis, enabling stable monitoring of ultra-low-core rails. Its reset logic combines asynchronous MR input (with 90-kΩ internal pullup) and SENSE threshold detection, driving an open-drain RESET output that remains asserted for the full programmed delay after both conditions clear.

Delay timing is controlled by an internal 220-nA current source charging the external CT capacitor to 1.23 V; discharge occurs during RESET assertion. The device achieves immunity to short SENSE transients (<20 μs) via overdrive-dependent transient rejection, and supports three delay configurations: 20 ms (CT open), 300 ms (CT to VDD via 40–200 kΩ), or programmable (CT to GND via ≥100 pF capacitor).

Key Specifications

Pinout & Package

TPS3808G01QDRVRQ1 is packaged in a 6-pin WSON (DRV) with 2.00 mm × 2.00 mm body size and exposed thermal pad. The thermal pad must be soldered to PCB ground plane for optimal thermal performance (R_θJC(bot) = 7.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G01QDRVRQ1, TPS3808G33QDBVRQ1 offers plug-and-play 3.3-V supervision but sacrifices adjustability and thermal performance, while MAX6326UT29D3+T reduces power consumption yet lacks automotive qualification and programmable timing-making TPS3808G01QDRVRQ1 uniquely suited for next-gen low-voltage automotive SoC supervision.

Availability

TPS3808G01QDRVRQ1 is available at Aetrix Electronics and suitable for automotive radar, ADAS vision processors, and electric power steering ECUs requiring stable component supply with AEC-Q100 compliance and long-term production support.

Supply support for TPS3808G01QDRVRQ1 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 power management ICs.

The TPS3808Gxx-Q1 product line was designed specifically for automotive power-supply supervision, emphasizing ultra-low IQ, high-accuracy thresholds, and robust transient immunity in harsh under-hood environments.

FAQ

What is the minimum supply voltage required for TPS3808G01QDRVRQ1 to operate correctly?

The TPS3808G01QDRVRQ1 requires a minimum VDD of 1.8 V to function within specification. Below this, the internal reference and comparator may not stabilize reliably, and RESET assertion timing becomes undefined. Operation at 1.8 V is validated across the full –40°C to +125°C temperature range, with typical quiescent current of 2.7 μA at this voltage.

How do I configure TPS3808G01QDRVRQ1 to monitor a 0.8-V rail?

To monitor a 0.8-V rail with TPS3808G01QDRVRQ1, connect the rail to the SENSE pin through a resistor divider that scales it to 0.405 V. Use R1 and R2 values satisfying V_IT = (1 + R1/R2) × 0.405 V; for 0.8 V, a ratio of R1/R2 ≈ 0.975 (e.g., R1 = 97.5 kΩ, R2 = 100 kΩ) achieves the target. Ensure divider current is >10× I_SENSE (±25 nA) for accuracy.

Does TPS3808G01QDRVRQ1 support manual reset functionality?

Yes, TPS3808G01QDRVRQ1 includes a dedicated MR pin that accepts active-low logic signals. Driving MR ≤0.3×VDD asserts RESET immediately, regardless of SENSE voltage. MR has an internal 90-kΩ pullup to VDD, so it can be left unconnected if manual reset is unused. This feature enables synchronized system-wide reset triggered by microcontrollers or watchdog timers.

What is the maximum recommended capacitance on the CT pin for TPS3808G01QDRVRQ1?

The CT pin supports capacitors from 100 pF up to 180 nF for delay times ranging from 1.25 ms to 10 s. Beyond 180 nF, delay increases linearly but leakage and parasitic effects degrade timing accuracy. TI specifies 180 nF as the upper limit for guaranteed 10-s maximum delay; larger values may cause excessive delay drift over temperature and voltage.

Is TPS3808G01QDRVRQ1 compatible with lead-free reflow profiles?

Yes, TPS3808G01QDRVRQ1 in the DRV (WSON) package is rated for standard lead-free reflow per JEDEC J-STD-020. Its moisture sensitivity level (MSL) is 2a, requiring bake-out only if exposed to ambient >30°C/60% RH for >168 hours. The thermal pad design supports efficient heat transfer during reflow, minimizing voiding risk when using appropriate stencil and paste volume.