Texas Instruments TPS3850G30DRCR

Overview

TPS3850G30DRCR 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 and WDO outputs, and enables ±4% or ±7% fault windows on rails from 0.9 V to 5.0 V - used in ultrasound scanners and active antenna systems.

For engineers reviewing the TPS3850G30DRCR datasheet, TPS3850G30DRCR pinout, TPS3850G30DRCR application, or TPS3850G30DRCR equivalent, this page provides verified specifications, validated pin functions, confirmed thermal and timing behavior, real-world application context for medical and telecom systems, and two technically documented alternative parts with explicit functional and timing differences.

Technical Context

The TPS3850G30DRCR implements a dual-threshold window comparator on the SENSE pin with independent overvoltage (VIT+(OV)) and undervoltage (VIT–(UV)) detection, each achieving ±0.8% accuracy across temperature. Its internal state machine evaluates CRST and CWD pins every time SENSE re-enters the valid window, with tINIT = 381 µs evaluation latency.

It integrates a programmable window watchdog with selectable lower/upper boundaries (tWDL/tWDU) set via CWD capacitor value and SET0/SET1 logic states - supporting ratios of 1/8, 3/4, or 1/2, or full disable. The watchdog only asserts WDO when RESET is high, and WDI edge timing must fall strictly between tWDL(max) and tWDU(min) for correct operation.

Key Specifications

Pinout & Package

TPS3850G30DRCR uses a 3.00-mm × 3.00-mm, 10-pin VSON package (DRC) with exposed thermal pad connected internally to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3850G30DRCR, TPS3851G30DRCR adds telemetry at higher quiescent current and cost, while MAX6373KA29+T omits watchdog functionality entirely - making TPS3850G30DRCR the optimal balance of precision, programmability, and integration for new safety-critical embedded designs.

Availability

TPS3850G30DRCR is available at Aetrix Electronics and suitable for ultrasound scanners, storage area networks, and active antenna systems requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TPS3850G30DRCR 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 automotive ICs.

The TPS3850G30DRCR belongs to TI's precision supervisory IC portfolio, engineered specifically for mission-critical power monitoring in systems where deterministic reset behavior and firmware-level fault detection are mandatory - such as medical imaging and 5G infrastructure.

FAQ

What is the operating voltage range for the TPS3850G30DRCR?

The TPS3850G30DRCR operates from 1.6 V to 6.5 V on its VDD pin, supporting a broad range of modern low-voltage rails including 1.2 V, 1.8 V, 3.3 V, and 5 V systems. This range allows direct integration into mixed-voltage SoC platforms without level-shifting or auxiliary regulation, and the device maintains full specification compliance - including 0.8% threshold accuracy and 10 µA supply current - across the entire range.

How does the TPS3850G30DRCR implement window watchdog functionality?

The TPS3850G30DRCR implements a true window watchdog using two independently programmable boundaries: tWDL (lower) and tWDU (upper). A falling edge on WDI must occur strictly between these boundaries to prevent WDO assertion. Boundaries are set via CWD capacitor value and SET0/SET1 logic states, supporting ratios of 1/8, 3/4, or 1/2 - enabling precise alignment with firmware loop timing. The TPS3850G30DRCR also allows full watchdog disable via SET pin configuration.

What is the accuracy of the voltage thresholds on the TPS3850G30DRCR over temperature?

The TPS3850G30DRCR 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. This is verified per TI's SBVS301B datasheet, with histogram data showing 99.9% of units within ±0.5% at 25°C and consistent performance across 41,111 tested units. This accuracy eliminates need for external calibration in high-integrity systems like infusion pumps and HVAC controllers.

Can the reset delay time of the TPS3850G30DRCR be programmed externally?

Yes, the reset delay time (tRST) of the TPS3850G30DRCR is fully programmable via an external capacitor on the CRST pin, supporting a range from 703 µs (0.1 nF) to 3.22 seconds (1000 nF). Alternatively, factory-programmed delays (e.g., 10 ms or 200 ms) are selected by leaving CRST unconnected or pulling it to VDD with a 10-kΩ resistor. The TPS3850G30DRCR's internal state machine evaluates CRST configuration within 381 µs after SENSE re-enters the valid window.

What package type and thermal characteristics does the TPS3850G30DRCR use?

The TPS3850G30DRCR is packaged in a 3.00-mm × 3.00-mm, 10-pin VSON (DRC) with exposed thermal pad internally connected to GND. Its junction-to-ambient thermal resistance (RθJA) is 52.3°C/W, and junction-to-board (RθJB) is 26.1°C/W - enabling reliable operation at +125°C junction temperature when mounted on standard 2-layer PCBs with adequate copper pour. The thermal pad must be soldered to a large-area ground plane per TI layout guidelines.