Texas Instruments TPS3808G33DBVRG4

Overview

TPS3808G33DBVRG4 from Texas Instruments is a low-quiescent-current, fixed-threshold supervisory circuit designed to monitor 3.3-V system rails and assert an open-drain RESET signal upon undervoltage or manual reset. It delivers 3.07-V threshold accuracy (±0.5% typical), 2.4-μA typical supply current, and user-programmable reset delay from 1.25 ms to 10 s via external capacitor on CT pin. Used in microcontroller power sequencing and FPGA configuration integrity.

For engineers reviewing the TPS3808G33DBVRG4 datasheet, TPS3808G33DBVRG4 pinout, TPS3808G33DBVRG4 application, or TPS3808G33DBVRG4 equivalent, key selection criteria include its 3.07-V fixed threshold, SOT-23-6 package compatibility, –40°C to 125°C operating range, open-drain RESET output with 0.4-V max VOL at 1 mA, and MR input with 90-kΩ internal pullup.

Technical Context

The TPS3808G33DBVRG4 implements a precision voltage comparator with built-in hysteresis (1% VIT) and an on-chip 220-nA current source for capacitor-based timing control. Its SENSE input monitors 3.3-V rails directly without external dividers, and RESET assertion is triggered by either SENSE falling below 3.07 V or MR pulled low.

Reset deassertion requires both SENSE > VIT + VHYS and MR high, followed by a delay determined solely by CT pin configuration-open (20 ms), resistor-to-VDD (300 ms), or capacitor-to-GND (1.25 ms–10 s). The device operates from 1.7 V to 6.5 V and maintains stable performance across full industrial temperature range.

Key Specifications

Pinout & Package

SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant matte tin lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G33DBVRG4, TPS3808G33DBVT offers identical performance in a smaller reel format, while MAX6326UT33+T trades programmability and MR support for lower quiescent current and smaller footprint-making it suitable only for static, space-constrained designs.

Availability

TPS3808G33DBVRG4 is available at Aetrix Electronics and suitable for microcontroller power sequencing, FPGA configuration integrity, and battery-powered edge node applications requiring stable component supply, long-term lifecycle assurance, and automotive-grade temperature resilience.

Supply support for TPS3808G33DBVRG4 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 industrial, automotive, and consumer markets.

The TPS3808 family is engineered for high-accuracy, low-power voltage supervision in resource-constrained embedded systems-emphasizing precision thresholding, flexible timing, and robust operation across extended temperature ranges.

FAQ

What is the exact threshold voltage and accuracy of the TPS3808G33DBVRG4?

The TPS3808G33DBVRG4 has a nominal threshold voltage of 3.07 V with ±0.5% typical accuracy over –40°C to 125°C. This specification applies specifically to the TPS3808G33DBVRG4 variant and is validated per TI's SBVS050M datasheet Section 5. Accuracy remains within ±1.25% over the full industrial temperature range, ensuring reliable 3.3-V rail monitoring without external calibration.

How is the reset delay time configured on the TPS3808G33DBVRG4?

The TPS3808G33DBVRG4 supports three delay configurations via the CT pin: open circuit yields 20 ms, connection to VDD through a 40–200-kΩ resistor gives 300 ms, and connection to a ≥100-pF capacitor to GND enables user-adjustable delays from 1.25 ms to 10 s. The delay is generated by an internal 220-nA current source charging the external capacitor to 1.23 V, as detailed in Section 8.3.2 of the TPS3808G33DBVRG4 datasheet.

Does the TPS3808G33DBVRG4 require external components for basic operation?

Yes-the TPS3808G33DBVRG4 requires a 0.1-μF ceramic capacitor on VDD and an external pullup resistor (10 kΩ–1 MΩ) on the open-drain RESET pin. If using programmable delay, a ≥100-pF capacitor must be connected between CT and GND. No external components are needed for MR if unused, due to its internal 90-kΩ pullup-confirmed in Table 6-1 and Section 8.3.3 of the TPS3808G33DBVRG4 datasheet.

Can the TPS3808G33DBVRG4 monitor voltages other than 3.3 V?

No-the TPS3808G33DBVRG4 is factory-trimmed for a fixed 3.07-V threshold and is not adjustable. To monitor other rails, select alternate variants: TPS3808G12 (1.12 V), TPS3808G25 (2.33 V), or TPS3808G01 (adjustable down to 0.405 V). The TPS3808G33DBVRG4's SENSE pin must be connected directly to the 3.3-V rail; using resistive dividers invalidates its specified accuracy and is not supported.

What package and thermal characteristics does the TPS3808G33DBVRG4 have?

The TPS3808G33DBVRG4 uses the SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, with gull-wing leads and matte tin finish. Its junction-to-ambient thermal resistance (R_θJA) is 180.9°C/W. The device is rated for continuous operation from –40°C to 125°C junction temperature, and thermal pad connection is not applicable-this feature exists only on the WSON (DRV) variant, not the DBV package used by TPS3808G33DBVRG4.