Texas Instruments TPS3808G12DRVR

Overview

TPS3808G12DRVR from Texas Instruments is a low-quiescent-current, programmable-delay supervisory circuit designed to monitor 1.2 V system rails and assert an open-drain RESET signal when the SENSE voltage drops below 1.12 V. It delivers 0.5% threshold accuracy, 2.4 μA typical supply current, and user-adjustable reset delay from 1.25 ms to 10 s-enabling reliable power-on reset in battery-powered microcontroller systems.

For engineers reviewing the TPS3808G12DRVR datasheet, TPS3808G12DRVR pinout, TPS3808G12DRVR application, or TPS3808G12DRVR equivalent, key selection considerations include its fixed 1.12 V threshold for 1.2 V rails, WSON-6 (2 mm × 2 mm) package with thermal pad, –40°C to 125°C operation, manual reset (MR) input, and compatibility with high-impedance pull-up configurations up to 6.5 V.

Technical Context

The TPS3808G12DRVR implements a precision bandgap reference and comparator architecture to achieve ±0.5% threshold accuracy over temperature for V_IT ≤ 3.3 V. Its internal 220 nA current source charges an external capacitor on the CT pin to set delay time, with three configuration modes: open (20 ms), resistor-to-V_DD (300 ms), or capacitor-to-GND (1.25 ms–10 s).

It operates across 1.7 V–6.5 V supply range and features hysteresis (1%–2.5% of V_IT) on the SENSE input to prevent chatter during slow-rising/falling rail transitions. The MR pin includes a 90 kΩ internal pull-up, and RESET output is open-drain with 0.4 V max VOL at 1 mA, supporting level-shifted reset signaling.

Key Specifications

Pinout & Package

TPS3808G12DRVR is packaged in a 6-pin WSON (DRV) with 2.00 mm × 2.00 mm body size and exposed thermal pad. The package supports fine-pitch PCB layout and enhanced thermal dissipation via ground-plane connection to the thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G12DRVR, the SOT-23 variant offers better board-level thermal conduction but less package-level heat dissipation, while the MAX6326 sacrifices programmability and manual reset for lower cost and smaller footprint-making it viable only in static, low-complexity designs.

Availability

TPS3808G12DRVR is available at Aetrix Electronics and suitable for battery-powered edge nodes, industrial motor controllers, FPGA configuration systems, and automotive infotainment modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3808G12DRVR 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 power management, signal chain, and real-time control technologies.

The TPS3808 family was engineered specifically for low-power, high-accuracy system supervision in portable, automotive, and industrial applications-emphasizing nanoscale quiescent current, factory-trimmed voltage thresholds, and flexible reset timing.

FAQ

What is the exact threshold voltage of the TPS3808G12DRVR?

The TPS3808G12DRVR has a nominal threshold voltage of 1.12 V, corresponding to supervision of a 1.2 V supply rail. This value is factory-trimmed with ±0.5% accuracy over –40°C to 125°C, as specified in TI's SBVS050M datasheet Section 5. The device achieves this precision using a bandgap reference and laser-trimmed resistive divider internal to the IC.

Can the TPS3808G12DRVR be used to monitor voltages other than 1.2 V?

No-the TPS3808G12DRVR is a fixed-threshold variant optimized exclusively for 1.2 V rails (V_IT = 1.12 V). To supervise other rails, select alternate members of the family: e.g., TPS3808G33 for 3.3 V (3.07 V threshold) or TPS3808G01 for adjustable thresholds down to 0.405 V. Using TPS3808G12DRVR outside its specified 1.2 V context violates datasheet operating conditions.

How is the reset delay time configured on the TPS3808G12DRVR?

The reset delay on TPS3808G12DRVR is set via the CT pin: leaving CT open yields 20 ms, connecting CT to V_DD through a 40–200 kΩ resistor gives 300 ms, and connecting CT to GND via a capacitor (≥100 pF) enables user-programmable delays from 1.25 ms to 10 s. Equation 1 in Section 8.3.2 of the datasheet defines the exact relationship: t_D(s) = C_T(nF) × 10⁻⁹ × (1.23 V / 220 nA) + 0.5 ms.

Does the TPS3808G12DRVR require an external pull-up resistor on the RESET pin?

Yes-the TPS3808G12DRVR features an open-drain RESET output and requires an external pull-up resistor (10 kΩ to 1 MΩ) to establish a valid high logic level. This resistor may connect to any supply up to 6.5 V, enabling level-shifting across mixed-voltage domains. Without it, RESET remains undefined and cannot drive a microprocessor's reset input correctly.

Is the thermal pad on the TPS3808G12DRVR package required to be connected to ground?

Yes-the DRV package's exposed thermal pad must be soldered to a PCB ground plane using ≥4 thermal vias. Per Section 7.4 of the datasheet, this connection reduces R_θJB from 135°C/W to ~13.5°C/W (estimated), preventing junction temperature exceedance under continuous operation at 125°C ambient. Omitting this compromises thermal performance and risks reliability failure in high-temperature applications.