Texas Instruments TPS3850G50DRCT

Overview

TPS3850G50DRCT from Texas Instruments is a precision voltage supervisor IC with integrated programmable window watchdog timer, designed for high-reliability power-rail monitoring in microcontroller and SoC systems. It delivers 0.8% threshold accuracy over –40°C to +125°C, supports 1.6 V–6.5 V supply range, features open-drain RESET/WDO outputs, and operates with only 10 µA typical supply current - enabling use in ultrasound scanners and industrial servo drives where tight voltage tolerance and fault detection timing are critical.

For engineers reviewing the TPS3850G50DRCT datasheet, TPS3850G50DRCT pinout, TPS3850G50DRCT application, or TPS3850G50DRCT equivalent, this page provides verified technical context, factory-programmed and capacitor-programmable timing parameters, validated pin functions, real-world application mappings, and confirmed alternative options - all grounded in TI's SBVS301B production datasheet (Rev. B, September 2021).

Technical Context

The TPS3850G50DRCT implements a dual-threshold window comparator on the SENSE pin with ±0.8% accuracy across temperature, plus 0.5% hysteresis, enabling precise overvoltage (VIT+(OV)) and undervoltage (VIT–(UV)) detection for rails from 0.9 V to 5.0 V. Its state-machine-based watchdog uses dedicated WDI input and WDO output to enforce strict timing windows - with lower boundary (tWDL) and upper boundary (tWDU) independently configurable via CWD/SET0/SET1 pins or external capacitors.

Reset delay (tRST) is factory-programmed with 9.5% accuracy or user-adjustable via CRST capacitor (703 µs to 3.22 s), while watchdog disable is supported through logic-level SET pin combinations. All timing paths - including tINIT (381 µs pin evaluation), tSET (500 µs SET pin transition), and tWD-setup (150 µs WDI enable delay) - are specified and tested per JEDEC conditions.

Key Specifications

Pinout & Package

TPS3850G50DRCT is housed in a 3.00 mm × 3.00 mm, 10-pin VSON package (DRC) with exposed thermal pad connected internally to GND. The package supports high-density PCB layouts and efficient thermal dissipation (RθJB = 26.1°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervision and window watchdog applications.

Compared with TPS3850G50DRCT, TPS3851G50DRCT trades SENSE rail adaptability for tighter fixed-voltage accuracy, while MAX6373KA29+T omits both window supervision and watchdog entirely - making neither a functional substitute without redesigning fault-handling architecture.

Availability

TPS3850G50DRCT is available at Aetrix Electronics and suitable for ultrasound scanner, storage area network, and active antenna system mMIMO applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for medical and industrial deployments.

Supply support for TPS3850G50DRCT 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 specializing in analog, embedded processing, and power management technologies, with decades of experience in high-reliability industrial and medical IC design.

The TPS3850G50DRCT belongs to TI's precision supervisory IC product line, engineered specifically for systems demanding simultaneous voltage rail integrity verification and deterministic watchdog fault recovery - such as next-generation medical imaging and 5G infrastructure equipment.

FAQ

What is the exact voltage threshold accuracy specification for TPS3850G50DRCT over temperature?

The TPS3850G50DRCT achieves ±0.8% accuracy for both overvoltage (VIT+(OV)) and undervoltage (VIT–(UV)) thresholds across the full operating junction temperature range of –40°C to +125°C, as measured on the SENSE pin and documented in Section 6.5 of the SBVS301B datasheet. This accuracy includes hysteresis contribution and is validated per JEDEC JESD22-A108 thermal cycling protocols.

How does the watchdog disable function work on TPS3850G50DRCT?

The TPS3850G50DRCT watchdog can be disabled by setting both SET0 and SET1 pins high (≥0.8 × VDD), which places the watchdog in a permanently inactive state - ignoring WDI transitions and preventing WDO assertion. This mode is explicitly defined in Table 6-6 and Section 7.3.4 of the datasheet, and is intended for development-phase debugging without hardware modification.

What are the valid capacitor ranges for programming reset delay on TPS3850G50DRCT?

The CRST pin accepts external capacitors from 0.1 nF to 1000 nF, yielding a reset delay (tRST) range of 703 µs to 3.22 seconds per Equation 3 in Section 8.1.1.2. Capacitor values outside this range are not characterized; 0.1 nF and 1000 nF represent the minimum and maximum validated points in TI's production test flow for TPS3850G50DRCT.

Does TPS3850G50DRCT support monitoring of sub-1-V rails?

No - the TPS3850G50DRCT is specified to monitor rails from 0.9 V to 5.0 V on the SENSE pin, with guaranteed performance only within that range. While the absolute maximum rating allows up to 6.5 V on SENSE, the ±0.8% accuracy, hysteresis, and fault window specifications apply strictly to 0.9–5.0 V nominal rails, as stated in Section 1 and Table 6-5 of the SBVS301B datasheet.

What is the thermal pad connection requirement for TPS3850G50DRCT?

The thermal pad of the TPS3850G50DRCT VSON-10 package is internally connected to GND and must be soldered to a large-area PCB ground plane. Per Section 6.4, this connection achieves RθJB = 26.1°C/W and is mandatory for meeting the rated –40°C to +125°C junction temperature specification; floating or unconnected thermal pads invalidate thermal and reliability ratings.