Texas Instruments TPS3802L30DCKR

Overview

TPS3802L30DCKR from Texas Instruments is a fixed-threshold voltage supervisor IC with 2.64 V detection, 380 ms reset delay, push-pull RESET output, manual reset (MR) input, and SC-70 (DCK) 5-pin package. It monitors VDD supply lines in low-power embedded systems to ensure reliable power-on initialization for microcontrollers and DSPs.

For engineers reviewing the TPS3802L30DCKR datasheet, TPS3802L30DCKR pinout, TPS3802L30DCKR application, or TPS3802L30DCKR equivalent, this page delivers verified electrical parameters, thermal operating range, reset timing behavior, MR interface logic, and real-world use context for industrial and portable designs requiring stable brownout detection.

Technical Context

The TPS3802L30DCKR uses an internal precision reference (1.14 V) and resistor divider to set a factory-trimmed 2.64 V threshold with ±2.5% accuracy over –40°C to +85°C. Its reset assertion is triggered by VDD falling below VIT–, and RESET remains active for 380 ms after VDD rises above threshold.

It features a dedicated MR input that forces RESET low when pulled to GND, independent of VDD status - enabling system-level manual reset. The push-pull output drives high/low without external pull-up, supporting direct connection to processor reset inputs.

Key Specifications

Pinout & Package

TPS3802L30DCKR is housed in a 5-pin SC-70 (DCK) package - 2.0 mm × 1.25 mm footprint, 1.1 mm max height - optimized for space-constrained PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3802L30DCKR, TPS3801L30DCKR offers faster reset release but less margin for slow-rising supplies, while TPS3802K33DCKR shifts detection upward to match tighter 3.3 V tolerance bands - both retain MR functionality and SC-70 compatibility without layout changes.

Availability

TPS3802L30DCKR is available at Aetrix Electronics and suitable for industrial PLCs, portable medical monitors, wireless sensor nodes, automotive body control modules, and battery-powered instrumentation requiring stable component supply across long product lifecycles.

Supply support for TPS3802L30DCKR 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 TPS380x family was designed specifically for ultra-small, low-power supply monitoring in space- and energy-constrained embedded systems - emphasizing precision threshold accuracy, factory-programmed timing, and minimal external component count.

FAQ

What is the exact reset threshold voltage of the TPS3802L30DCKR?

The TPS3802L30DCKR has a factory-trimmed supply voltage detection threshold of 2.64 V (typical), with guaranteed limits of 2.58 V (min) and 2.70 V (max) over –40°C to +85°C. This value is fixed and not adjustable - it applies directly to the VDD pin and is derived from an internal 1.14 V reference with precision resistor scaling. The TPS3802L30DCKR does not support external threshold programming.

Does the TPS3802L30DCKR require an external pull-up resistor on the RESET pin?

No, the TPS3802L30DCKR features a push-pull RESET output capable of actively driving high or low without external components. It can source up to 5 mA and sink up to 5 mA, allowing direct connection to microcontroller reset inputs. Unlike open-drain supervisors, the TPS3802L30DCKR eliminates the need for a pull-up resistor, reducing BOM cost and PCB area.

How does the manual reset (MR) function interact with the power-on reset behavior of the TPS3802L30DCKR?

The MR input of the TPS3802L30DCKR is independent of VDD monitoring: pulling MR low forces RESET active immediately, even if VDD is within specification. When MR is released (high), RESET deasserts only after VDD exceeds 2.64 V and the 380 ms internal timer completes. This allows coordinated system reset during debug, firmware updates, or watchdog recovery - fully supported in the TPS3802L30DCKR design.

What is the recommended bypass capacitor for the TPS3802L30DCKR VDD pin?

A 0.1 µF ceramic capacitor is recommended between VDD and GND, placed as close as possible to the TPS3802L30DCKR pins. This minimizes high-frequency noise coupling into the internal reference and comparator, ensuring stable threshold detection - especially critical under fast transient load conditions. TI's datasheet explicitly states this requirement to maintain ±2.5% threshold accuracy in the TPS3802L30DCKR.

Is the TPS3802L30DCKR compatible with 1.8 V supply rails?

No - the TPS3802L30DCKR requires a minimum VDD of 1.6 V to operate, but its 2.64 V threshold is intended for monitoring 2.7–3.3 V rails. For 1.8 V systems, TI recommends the TPS3801E18DCKR (1.71 V threshold) or TPS3801-01DCKR (adjustable via external resistor divider). Using the TPS3802L30DCKR on a 1.8 V rail would result in permanent RESET assertion, as VDD never reaches the 2.64 V trip point.