Texas Instruments TPS3808G25DRVR

Overview

TPS3808G25DRVR 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 when the SENSE voltage falls below 2.33 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 TPS3808G25DRVR datasheet, TPS3808G25DRVR pinout, TPS3808G25DRVR application, or TPS3808G25DRVR equivalent, key selection criteria include its fixed 2.33-V threshold for 2.5-V rails, SOT-23-6/WSON-6 package compatibility, –40°C to 125°C operation, open-drain RESET output with 0.4-V max VOL at 1 mA, and MR input with 90-kΩ internal pullup.

Technical Context

The TPS3808G25DRVR implements a precision voltage comparator with built-in hysteresis (1%–2.5% of VIT) and an on-chip 220-nA current source that charges the external CT capacitor to set reset delay. Its SENSE input monitors rail voltage directly, while MR provides asynchronous reset initiation independent of supply monitoring.

RESET assertion is governed by dual conditions: SENSE falling below 2.33 V or MR pulled low; deassertion requires both SENSE > 2.33 V + VHYS and MR high, followed by the full programmed delay. The device operates across 1.7 V to 6.5 V VDD and maintains 2.4 μA IDD over temperature.

Key Specifications

Pinout & Package

TPS3808G25DRVR is packaged in a 2-mm × 2-mm WSON-6 (DRV) package with exposed thermal pad. Pin 1 is RESET; pin 2 is SENSE; pin 3 is MR; pin 4 is CT; pin 5 is GND; pin 6 is VDD. The thermal pad must be connected to PCB ground for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G25DRVR, the TPS3808G25DBVR offers identical supervision functionality in a larger, more manufacturable package, while the MAX6326LT25D2T sacrifices programmability and MR support for lower quiescent current-making it suitable only for static, low-power applications without timing or control flexibility.

Availability

TPS3808G25DRVR is available at Aetrix Electronics and suitable for microcontroller power-on reset, battery-powered portable devices, FPGA configuration sequencing, and industrial edge controller supervision requiring stable component supply across automotive and industrial temperature ranges.

Supply support for TPS3808G25DRVR 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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and real-time control ICs.

The TPS3808 family was engineered for high-accuracy, ultra-low-power system supervision in space- and energy-constrained applications-including portable electronics, automotive ECUs, and industrial PLCs-where reliable reset generation is critical to functional safety.

FAQ

What is the exact threshold voltage of the TPS3808G25DRVR and how is it specified?

The TPS3808G25DRVR has a nominal threshold voltage of 2.33 V, corresponding to a 2.5-V nominal supply rail. This value is factory-trimmed with ±0.5% accuracy over –40°C to 125°C for VIT ≤ 3.3 V. The specification appears in TI's official SBVS050M datasheet Table 5 and is guaranteed across temperature and supply voltage variations, ensuring consistent reset behavior without external calibration.

Can the TPS3808G25DRVR be used to monitor voltages other than 2.5 V?

No-the TPS3808G25DRVR is a fixed-threshold variant optimized exclusively for 2.5-V rails (VIT = 2.33 V). For adjustable or alternate thresholds, TI offers the TPS3808G01 (0.405 V adjustable) or TPS3808G33 (3.07 V for 3.3-V rails). Using TPS3808G25DRVR on non-2.5-V rails risks premature or missed reset assertion due to mismatched threshold-to-rail ratio.

How does the CT pin configure reset delay on the TPS3808G25DRVR?

The CT pin on the TPS3808G25DRVR sets reset delay via three configurations: open circuit yields 20 ms; connection to VDD through a 40–200-kΩ resistor yields 300 ms; connection to a ≥100-pF capacitor to GND enables user-programmable delay from 1.25 ms to 10 s. The internal 220-nA current source charges the capacitor to 1.23 V to terminate the delay, as detailed in Section 8.3.2 of the SBVS050M datasheet.

What is the recommended pullup resistor value for the RESET output of the TPS3808G25DRVR?

Texas Instruments specifies a RESET pullup resistor between 10 kΩ and 1 MΩ for the TPS3808G25DRVR. A 100-kΩ resistor is commonly used to balance rise time (≤1 μs with 50-pF load) and power consumption (<50 μA at 5 V). Values below 10 kΩ risk exceeding the 5-mA absolute maximum sink current; values above 1 MΩ may cause slow edges or noise susceptibility in noisy environments.

Does the TPS3808G25DRVR support operation at 1.8-V supply voltage?

Yes-the TPS3808G25DRVR operates across a VDD range of 1.7 V to 6.5 V per Section 7.3 of the SBVS050M datasheet. At 1.8 V, it maintains full functionality including 2.33-V threshold monitoring, 2.4-μA quiescent current, and MR input compatibility. However, RESET output low voltage (VOL) rises to 0.3 V max at 0.4 mA sink, requiring verification against downstream MCU reset input thresholds.