Texas Instruments TPS3808G25DRVTG4

Overview

TPS3808G25DRVTG4 from Texas Instruments is a low-quiescent-current, programmable-delay supervisory circuit designed to monitor 2.5-V system rails and assert an open-drain RESET signal upon undervoltage or manual reset. It delivers 2.33-V threshold accuracy (±0.5% typical), 20-ms to 10-s user-adjustable delay, 2.4-μA typical supply current, and operates across –40°C to 125°C - ideal for battery-powered microcontroller power sequencing in portable electronics.

For engineers reviewing the TPS3808G25DRVTG4 datasheet, TPS3808G25DRVTG4 pinout, TPS3808G25DRVTG4 application, or TPS3808G25DRVTG4 equivalent, key selection criteria include its fixed 2.33-V threshold for 2.5-V rails, SOT-23-6 package compatibility, open-drain RESET output with external pull-up support up to 6.5 V, and immunity to short SENSE transients via built-in hysteresis.

Technical Context

The TPS3808G25DRVTG4 implements a precision voltage comparator with 0.5% threshold accuracy for VIT ≤ 3.3 V, using an internal reference and hysteresis (1% of VIT) to prevent chatter during threshold crossings. Its reset delay is controlled by an on-chip 220-nA current source charging the CT pin capacitor - enabling precise timing from 1.25 ms to 10 s or fixed 20/300 ms delays via CT pin configuration.

It features a manually controllable MR input with 90-kΩ internal pull-up, open-drain RESET output requiring external pull-up (10 kΩ–1 MΩ), and SENSE input capable of monitoring voltages from 0 to 6.5 V. The device asserts RESET when either SENSE falls below 2.33 V or MR is driven low, holding RESET active for the full delay period after both conditions clear.

Key Specifications

Pinout & Package

TPS3808G25DRVTG4 is packaged in a 6-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size, optimized for space-constrained PCB layouts and compatible with standard pick-and-place assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G25DRVTG4, TPS3808G25DBVR offers identical supervision performance in a cost-optimized reel format, while MAX6326UT25+T trades programmability and MR capability for lower I_DD and smaller footprint - making TPS3808G25DRVTG4 optimal for designs needing field-serviceable reset control and precise timing alignment.

Availability

TPS3808G25DRVTG4 is available at Aetrix Electronics and suitable for microcontroller power sequencing, battery-powered portable devices, FPGA configuration integrity, and industrial edge controller boot requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS3808G25DRVTG4 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 precision voltage supervision in resource-constrained systems, emphasizing ultra-low power consumption, high threshold accuracy, and flexible reset timing - specifically targeting battery-operated and thermally demanding embedded applications.

FAQ

What is the exact threshold voltage of the TPS3808G25DRVTG4 and how accurate is it?

The TPS3808G25DRVTG4 has a nominal threshold voltage of 2.33 V, with typical accuracy of ±0.5% over –40°C to 125°C for V_IT ≤ 3.3 V. This specification is confirmed in TI's SBVS050M datasheet Table 5 and Section 7.5, ensuring reliable supervision of 2.5-V rails without additional margining. The TPS3808G25DRVTG4 achieves this accuracy via a precision internal reference and trimmed comparator architecture.

Can the TPS3808G25DRVTG4 be used to monitor voltages other than 2.5 V?

No - the TPS3808G25DRVTG4 is factory-trimmed exclusively for 2.5-V rail supervision with a fixed 2.33-V threshold. To monitor other rails, select variants like TPS3808G33 (3.07 V) or TPS3808G01 (adjustable down to 0.405 V). The TPS3808G25DRVTG4 does not support external resistor dividers for threshold adjustment; its internal reference is hard-coded.

What is the default reset delay time for the TPS3808G25DRVTG4 and how is it set?

The TPS3808G25DRVTG4 defaults to a 20-ms reset delay when the CT pin is left unconnected (open). This is achieved by disabling the internal timing capacitor charge path. The TPS3808G25DRVTG4 supports alternative delays: 300 ms (CT tied to VDD via 40–200-kΩ resistor) or user-programmable values (1.25 ms–10 s) using a CT-to-GND capacitor ≥100 pF, as detailed in Section 8.3.2 of the datasheet.

Does the TPS3808G25DRVTG4 require an external pull-up resistor on the RESET pin?

Yes - the TPS3808G25DRVTG4 features an open-drain RESET output and requires an external pull-up resistor between RESET and the target logic supply (e.g., 3.3 V or 5 V). TI recommends 10 kΩ to 1 MΩ; typical designs use 100 kΩ for noise immunity and fast rise time. Without this resistor, the TPS3808G25DRVTG4 cannot assert a valid logic-high state, rendering the reset function inoperable.

Is the TPS3808G25DRVTG4 compatible with the SOT-23-6 footprint of other TI supervisors?

Yes - the TPS3808G25DRVTG4 uses the standard DBV (SOT-23-6) package with 2.90 mm × 1.60 mm body size and identical pinout (RESET/GND/MR/CT/SENSE/VDD) as other TPS3808 variants and compatible TI supervisors like TPS3801. This ensures direct PCB footprint reuse and simplifies second-source qualification. The TPS3808G25DRVTG4 maintains pin-for-pin compatibility across the TPS3808 family in SOT-23 packaging.