Texas Instruments TPS3801I50DCKRG4

Overview

TPS3801I50DCKRG4 from Texas Instruments is a fixed-threshold voltage supervisor IC with 4.55 V detection, 200 ms reset delay, and push-pull RESET output in a 5-pin SC-70 (DCK) package. It monitors VDD supply voltage for microcontrollers and DSPs, asserting RESET when VDD drops below threshold and holding it active for the factory-programmed delay after recovery. Used in portable equipment and industrial embedded systems requiring reliable power-on initialization.

For engineers reviewing the TPS3801I50DCKRG4 datasheet, TPS3801I50DCKRG4 pinout, TPS3801I50DCKRG4 application, or TPS3801I50DCKRG4 equivalent, key selection criteria include its 4.55 V ±2.5% threshold accuracy, 9–25 µA supply current across 2–6 V VDD, –40°C to +85°C operating range, and absence of manual reset input (MR pin not functional on this variant).

Technical Context

The TPS3801I50DCKRG4 implements a precision bandgap reference (1.14 V) and comparator architecture to monitor VDD directly-no external SENSE resistor required. Its internal timer generates a fixed 200 ms RESET assertion period after VDD recovers above the 4.55 V threshold, with hysteresis of 60 mV to prevent chatter near trip point.

This variant belongs to the TPS3801-xx subfamily and excludes the manual reset (MR) function present in other members (e.g., TPS3800/TPS3802). The RESET output is push-pull, capable of sinking 5 mA or sourcing –5 mA, eliminating need for external pull-up in most applications.

Key Specifications

Pinout & Package

TPS3801I50DCKRG4 uses the SC-70 (DCK) 5-pin surface-mount package (2.15 mm × 1.4 mm × 1.1 mm max height), optimized for space-constrained PCB layouts. Pin 1 is marked by an index area; orientation follows JEDEC MO-203 with pin 1 in quadrant Q3 on tape.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TPS3801T50DCKR and TPS3802L30DCKR, the TPS3801I50DCKRG4 provides the highest fixed threshold in the family (4.55 V), making it optimal for strict 5 V rail supervision where margin above 4.5 V is critical-without sacrificing low current or small footprint.

Availability

TPS3801I50DCKRG4 is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, and automotive body electronics requiring stable component supply and long-term lifecycle support.

Supply support for TPS3801I50DCKRG4 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 over 50 years of innovation in high-reliability IC design.

The TPS380x family was developed specifically for robust, low-power supply voltage supervision in DSP, microcontroller, and processor-based systems-emphasizing precision thresholding, minimal board space, and industrial temperature resilience.

FAQ

What is the exact reset threshold voltage of the TPS3801I50DCKRG4?

The TPS3801I50DCKRG4 has a factory-trimmed fixed threshold voltage of 4.55 V, with a total accuracy of ±2.5% over the full –40°C to +85°C operating temperature range. This value is specified in the Electrical Characteristics table under "Negative-going input threshold voltage" for the TPS380xI50 variant, and applies directly to the TPS3801I50DCKRG4.

Does the TPS3801I50DCKRG4 support manual reset functionality via the MR pin?

No, the TPS3801I50DCKRG4 does not support manual reset. The MR pin is present but non-functional on this specific variant (TPS3801-xx with fixed VDD monitoring). Per the datasheet Functional Block Diagram and truth table, only TPS3800-xx and TPS3802-xx variants include operational MR input; TPS3801I50DCKRG4's MR pin must be left unconnected or tied to VDD.

What is the recommended bypass capacitor for the TPS3801I50DCKRG4?

A 0.1 µF ceramic capacitor is recommended between VDD and GND, placed as close as possible to the TPS3801I50DCKRG4 package. This minimizes supply noise coupling into the internal reference and comparator, ensuring stable threshold detection-especially critical given the device's 60 mV hysteresis and 2.5% accuracy specification.

Can the TPS3801I50DCKRG4 be used to monitor a 3.3 V supply rail?

No-the TPS3801I50DCKRG4 is designed exclusively for 4.55 V threshold detection and is not suitable for direct 3.3 V rail supervision. Its minimum valid VDD is 2 V, but the fixed 4.55 V trip point means it will assert RESET continuously on a 3.3 V supply. For 3.3 V monitoring, consider TPS3801K33DCKR (2.93 V) or TPS3801L30DCKR (2.64 V), both in the same SC-70 package.

What is the maximum allowable supply voltage for the TPS3801I50DCKRG4?

The absolute maximum supply voltage (VDD) for the TPS3801I50DCKRG4 is 7 V, but continuous operation above 6 V is not recommended. The Recommended Operating Conditions specify a maximum VDD of 6 V; operation at 7 V is limited to ≤1000 hours total to ensure long-term reliability, per Absolute Maximum Ratings footnote (2).