Texas Instruments TPS3803-01DCKR

Overview

TPS3803-01DCKR from Texas Instruments is a single-channel adjustable-voltage supervisor IC with open-drain reset output, designed for power-on reset and supply monitoring in low-power embedded systems. It features a 1.226 V internal reference, ±1.5% threshold accuracy over −40°C to +85°C, 3 µA typical supply current at 3.3 V, and operates from 1.3 V to 6 V supply. It is used in microcontroller-based battery-powered equipment to ensure reliable system initialization.

For engineers reviewing the TPS3803-01DCKR datasheet, TPS3803-01DCKR pinout, TPS3803-01DCKR application, or TPS3803-01DCKR equivalent, key selection criteria include adjustable SENSE input configuration, open-drain RESET timing behavior, SC-70 package thermal performance, and compatibility with 1.3–6 V supply rails in space-constrained designs.

Technical Context

The TPS3803-01DCKR implements a precision comparator architecture with an internal 1.226 V reference and hysteresis of 15 mV (for thresholds between 1.2 V and 2.5 V). Its SENSE input accepts externally divided voltages, enabling flexible monitoring of any rail ≥1.3 V via two external resistors.

Reset assertion occurs when VDD drops below 0.8 V during power-up or when SENSE falls below the programmed threshold; deassertion requires SENSE to exceed VIT by ≥15 mV. Propagation delay from SENSE or VDD to RESET is 5–100 µs across temperature and supply conditions.

Key Specifications

Pinout & Package

TPS3803-01DCKR is housed in a 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm footprint, 1.1 mm max height, JEDEC MO-203 compliant - optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3803G15DCKR and MAX6326UT29D3+, the TPS3803-01DCKR uniquely supports user-defined reset thresholds via external resistor dividers while maintaining ultra-low quiescent current and minimal SC-70 footprint - making it optimal for multi-rail, space-constrained, and battery-sensitive applications where flexibility and efficiency are co-prioritized.

Availability

TPS3803-01DCKR is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, smart meter communication units, and automotive body control modules requiring stable component supply and long-term manufacturability.

Supply support for TPS3803-01DCKR 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 expertise in high-reliability supervisory circuits.

The TPS3803 family was engineered specifically for low-power, precision supply monitoring in battery-operated and industrial embedded systems - emphasizing threshold accuracy, minimal current draw, and small-footprint packaging.

FAQ

What is the exact threshold voltage of TPS3803-01DCKR and how is it set?

The TPS3803-01DCKR has a nominal internal reference voltage of 1.226 V, which defines the threshold at the SENSE pin. Unlike fixed-threshold variants, this device does not use an internal voltage divider - instead, users configure the actual trip point by connecting two external resistors between VDD, SENSE, and GND. The ratio determines the voltage at SENSE that triggers reset, allowing precise adaptation to any monitored rail above 1.3 V. This value is confirmed in the Electrical Characteristics table of the SLVS392A datasheet.

Does TPS3803-01DCKR support monitoring multiple supply rails simultaneously?

No, the TPS3803-01DCKR monitors only one rail at a time - either VDD directly or an external rail via the SENSE pin, but not both concurrently. It is a single-channel supervisor. For dual-rail monitoring, TI offers the TPS3805 series (e.g., TPS3805H33DCKR), which includes separate VDD and SENSE inputs with independent threshold detection logic. The TPS3803-01DCKR's design intentionally simplifies supervision for cost- and space-sensitive single-rail applications.

What is the maximum sink current capability of the RESET output on TPS3803-01DCKR?

The RESET pin on TPS3803-01DCKR is an open-drain output rated for a maximum low-level output current (IOL) of 5 mA. This is specified under Absolute Maximum Ratings and verified in Electrical Characteristics (VOL = 0.3 V at IOL = 2 mA, VDD = 3.3 V). Designers must select an appropriate pull-up resistor to ensure voltage levels meet downstream logic requirements while staying within this 5 mA limit - especially important when driving multiple loads or long traces.

Can TPS3803-01DCKR operate reliably at 1.3 V supply voltage?

Yes, the TPS3803-01DCKR is fully specified to operate down to 1.3 V supply voltage, as stated in the Recommended Operating Conditions table. At this minimum VDD, it maintains functional reset assertion/deassertion behavior and retains its 1.226 V reference accuracy. However, propagation delay increases slightly (still within 5–100 µs), and supply current rises modestly - all validated across −40°C to +85°C. This makes TPS3803-01DCKR suitable for emerging ultra-low-voltage microcontrollers and energy-harvesting systems.

Is there an automotive-grade version of TPS3803-01DCKR available?

Yes, the automotive-qualified variant is the TPS3803-01QDR, which is AEC-Q100 Grade 2 qualified (−40°C to +105°C) and manufactured under TI's automotive quality管理体系. It shares identical electrical specifications and pinout with the TPS3803-01DCKR but includes enhanced process controls, extended temperature validation, and automotive-specific traceability. The "Q" suffix denotes qualification - not a drop-in replacement unless the full automotive qualification scope (including PPAP, failure analysis, and lot traceability) is required for the target application.