Texas Instruments TPS3803-01DCKRG4

Overview

TPS3803-01DCKRG4 from Texas Instruments is a single-supply voltage supervisor IC with adjustable threshold sensing via external resistor divider, ±1.5% threshold accuracy at 1.226 V, 3 µA typical supply current at 3.3 V, open-drain active-low RESET output, and operation from −40°C to +85°C in SC-70 package - used for power-on reset and brownout detection in microcontroller-based portable systems.

For engineers reviewing the TPS3803-01DCKRG4 datasheet, TPS3803-01DCKRG4 pinout, TPS3803-01DCKRG4 application, or TPS3803-01DCKRG4 equivalent, key selection criteria include adjustable SENSE input compatibility, low quiescent current for battery-powered designs, fixed 1.226 V internal reference, open-drain RESET drive capability, and SC-70 thermal and layout constraints.

Technical Context

The TPS3803-01DCKRG4 implements a precision comparator architecture comparing the SENSE input voltage against an internal 1.226 V reference, with hysteresis of 15 mV for noise immunity. It asserts RESET when SENSE falls below VIT and deasserts only after SENSE rises above VIT + Vhys.

Unlike fixed-threshold variants (e.g., TPS3803G15), the TPS3803-01DCKRG4 requires no internal voltage divider on VDD; instead, it monitors an externally configured SENSE node, enabling flexible monitoring of any rail - including 1.2 V, 1.8 V, or 2.5 V supplies - while maintaining VDD supply range from 1.3 V to 6 V.

Key Specifications

Pinout & Package

TPS3803-01DCKRG4 uses the 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm footprint, 1.1 mm max height, lead pitch 0.65 mm - optimized for space-constrained PCB layouts and reflow-compatible with standard SMT processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3803G15DCKR and TLV803DBZT, the TPS3803-01DCKRG4 uniquely supports user-defined reset thresholds across 1.3–6 V supplies via external resistors - making it the only option among the three for multi-rail or non-standard voltage monitoring without redesigning the supervisor network.

Availability

TPS3803-01DCKRG4 is available at Aetrix Electronics and suitable for portable medical devices, industrial PLC I/O modules, automotive body control units, and battery-powered wireless sensor nodes requiring stable component supply and long-term manufacturability.

Supply support for TPS3803-01DCKRG4 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 delivering analog, embedded processing, and connectivity solutions with deep expertise in power management and signal chain design.

The TPS3803 family was engineered specifically for reliable power-on reset and brownout protection in resource-constrained embedded systems - emphasizing low quiescent current, high threshold accuracy, and small-footprint packaging for modern portable and industrial electronics.

FAQ

What is the exact threshold voltage of the TPS3803-01DCKRG4, and how is it set?

The TPS3803-01DCKRG4 has an internal reference of 1.226 V with ±1.5% accuracy over temperature. Its threshold is set by connecting the SENSE pin to a resistor divider between the target supply rail and ground - the trip point equals 1.226 V × (R1 + R2) / R2. No internal divider is used, unlike fixed-threshold variants such as the TPS3803G15DCKR. This configuration is confirmed in the functional block diagram and electrical characteristics table of the SLVS392A datasheet.

Does the TPS3803-01DCKRG4 require a bypass capacitor, and where should it be placed?

Yes, the TPS3803-01DCKRG4 requires a 0.1 µF ceramic bypass capacitor placed as close as possible between the VDD and GND pins. This is explicitly stated in the datasheet's "Negative-going input threshold voltage" footnote and reinforced in the recommended operating conditions section to ensure stable reference operation and noise immunity. Failure to place this capacitor may cause erratic RESET behavior or reduced threshold accuracy.

What is the RESET output configuration of the TPS3803-01DCKRG4, and what pull-up voltage should be used?

The TPS3803-01DCKRG4 features an open-drain, active-low RESET output. It must be pulled up externally - the pull-up voltage can be any rail up to 6 V (within absolute maximum ratings), independent of VDD. For example, a 3.3 V pull-up is common even when VDD is 1.8 V, enabling level translation. This is documented in the Terminal Functions table and functional block diagram of the SLVS392A datasheet.

Can the TPS3803-01DCKRG4 monitor multiple supply rails simultaneously?

No - the TPS3803-01DCKRG4 is a single-input supervisor monitoring only one rail via the SENSE pin. To supervise multiple rails (e.g., VDD and AVDD), separate TPS3803-01DCKRG4 devices or a dual-supervisor like the TPS3805H33DCKR are required. The datasheet clearly distinguishes TPS3803 (single SENSE) from TPS3805 (dual SENSE), and no multiplexing or sequential monitoring capability is specified for the TPS3803-01DCKRG4.

Is the TPS3803-01DCKRG4 pin-compatible with other devices in the TPS3803 family?

No - the TPS3803-01DCKRG4 shares the same SC-70 (DCK) 5-pin package and pinout (NC, GND, RESET, VDD, SENSE) with TPS3803G15DCKR and TPS3805H33DCKR, but functional differences exist: TPS3803G15 uses Pin 5 as NC (not SENSE), and TPS3805H33 uses Pin 3 as push-pull RESET (not open-drain). Thus, while physical placement is identical, electrical connections and firmware assumptions must be verified per device. This is confirmed in the Terminal Functions table and ordering information section.