Texas Instruments TPS3808G33DRVR

Overview

TPS3808G33DRVR 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 when the SENSE voltage drops below 3.07 V or MR is pulled low. It delivers 0.5% threshold accuracy, 2.4 μA typical supply current, and user-programmable reset delay from 1.25 ms to 10 s via external capacitor on CT pin. It supports battery-powered microcontroller systems requiring reliable power-on reset with minimal current draw.

For engineers reviewing the TPS3808G33DRVR datasheet, TPS3808G33DRVR pinout, TPS3808G33DRVR application, or TPS3808G33DRVR equivalent, key selection criteria include its 3.07-V fixed threshold, SOT-23-6/WSON-6 package options, open-drain RESET output with 0.4-V max VOL at 1 mA, –40°C to 125°C operating range, and compatibility with manual reset assertion and transient-immune SENSE monitoring.

Technical Context

The TPS3808G33DRVR implements a precision bandgap reference and comparator architecture to achieve ±0.5% threshold accuracy for VIT ≤ 3.3 V. Its internal 220-nA current source charges the external CT capacitor to 1.23 V to define reset timeout, enabling precise delay tuning across six decades.

It operates over 1.7–6.5 V supply range and features built-in hysteresis (1% of VIT), MR input with 90-kΩ internal pull-up, and open-drain RESET output compatible with voltages up to 6.5 V via external pull-up. The device enters undefined state only below 0.8 V VDD and asserts RESET during brownout or manual trigger events.

Key Specifications

Pinout & Package

TPS3808G33DRVR is available in the 6-pin WSON (DRV) package: 2.00 mm × 2.00 mm body with exposed thermal pad. This RoHS-compliant, moisture-sensitive-level-1 package supports reflow soldering and provides enhanced thermal performance (RθJB = 135°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G33DRVR, TPS3808G33DBVR offers identical functionality in a smaller-outline SOT-23 package but lacks thermal pad benefits, while MAX6326UT33+T trades programmable delay for lower quiescent current and simpler implementation in fixed-timing applications.

Availability

TPS3808G33DRVR is available at Aetrix Electronics and suitable for microcontroller power-on reset, FPGA configuration monitoring, and battery-powered edge node applications requiring stable component supply, long-lifecycle support, and AEC-Q200-aligned reliability.

Supply support for TPS3808G33DRVR 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 for industrial, automotive, and personal electronics markets.

The TPS3808 family is engineered for high-accuracy, low-power system supervision-targeting applications where rail stability, long battery life, and wide temperature operation are essential design constraints.

FAQ

What is the exact threshold voltage of the TPS3808G33DRVR?

The TPS3808G33DRVR has a fixed threshold voltage of 3.07 V, corresponding to nominal 3.3-V rail supervision. This value is factory-trimmed with ±0.5% accuracy over –40°C to 125°C junction temperature, ensuring consistent detection of undervoltage conditions without external calibration.

How do I configure the reset delay time for the TPS3808G33DRVR?

The TPS3808G33DRVR reset delay is configured via the CT pin: leave CT open for 20 ms, connect CT to VDD through a 40–200 kΩ resistor for 300 ms, or connect CT to GND via a capacitor ≥100 pF for user-adjustable delay from 1.25 ms to 10 s. The delay is determined by internal 220-nA charging of the capacitor to 1.23 V.

Can the TPS3808G33DRVR monitor voltages other than 3.3 V?

No-the TPS3808G33DRVR is a fixed-threshold variant calibrated specifically for 3.3-V rails (VIT = 3.07 V). To monitor other rails, select alternate part numbers such as TPS3808G25 (2.33 V) or TPS3808G12 (1.12 V); the adjustable TPS3808G01 supports thresholds down to 0.405 V using external resistors.

What package type does the TPS3808G33DRVR use, and what are its thermal characteristics?

The TPS3808G33DRVR uses the DRV package: a 6-pin 2.00 mm × 2.00 mm WSON with exposed thermal pad. Its thermal resistance is RθJB = 135°C/W and RθJC(bot) = 7.3°C/W, enabling efficient heat dissipation when the thermal pad is soldered to a PCB ground plane.

Does the TPS3808G33DRVR require an external pull-up resistor on the RESET pin?

Yes-the TPS3808G33DRVR features an open-drain RESET output and requires an external pull-up resistor between RESET and the target supply rail (e.g., 3.3 V or 5 V). Recommended values range from 10 kΩ to 1 MΩ; lower values improve rise time but increase static current, while higher values reduce current but slow edge transitions.