Texas Instruments TPS3823-30DBVRG4

Overview

TPS3823-30DBVRG4 from Texas Instruments is a fixed-threshold voltage supervisor IC with integrated watchdog timer, active-low push-pull reset output, manual reset input, and 3.0V supply monitoring capability. It delivers 200ms reset delay, 1.6s watchdog timeout, 15μA typical supply current, and operates across −40°C to 85°C - used for reliable power-on initialization and fault recovery in microcontroller-based embedded systems.

For engineers reviewing the TPS3823-30DBVRG4 datasheet, TPS3823-30DBVRG4 pinout, TPS3823-30DBVRG4 application, or TPS3823-30DBVRG4 equivalent, key selection criteria include its 3.0V threshold accuracy (±2.7% over temperature), watchdog timer behavior under WDI floating conditions, MR input pullup value, RESET output drive strength, and SOT-23-5 package thermal performance.

Technical Context

The TPS3823-30DBVRG4 implements a precision bandgap reference and comparator-based supervision architecture with internal hysteresis (50mV) to reject supply noise. Its watchdog timer requires periodic falling-edge transitions on WDI to prevent timeout; if left floating, it generates internal pulses to inhibit false resets.

Reset assertion occurs when VDD falls below 2.59V (min) or rises above 1.1V during power-up; release is delayed 200ms after VDD exceeds VIT− + VHYS. The device uses no external components and supports bidirectional reset signaling via MR and RESET pins.

Key Specifications

Pinout & Package

TPS3823-30DBVRG4 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, optimized for space-constrained PCB layouts and compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3823-30DBVRG4, TPS3823-33DBVR shifts the supervision window upward for 3.3V systems, while MAX6326UT30D3+ sacrifices watchdog functionality to reduce complexity and cost - making TPS3823-30DBVRG4 optimal for designs requiring both precise 3.0V monitoring and autonomous firmware recovery.

Availability

TPS3823-30DBVRG4 is available at Aetrix Electronics and suitable for industrial automation, battery-powered IoT nodes, and network infrastructure equipment requiring stable component supply and guaranteed long-term sourcing.

Supply support for TPS3823-30DBVRG4 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 and embedded processing solutions with emphasis on reliability, precision, and energy efficiency.

The TPS382x product line was developed specifically for robust power-supply monitoring and system-level fault recovery in DSP, microcontroller, and microprocessor applications - prioritizing low power, small footprint, and zero-external-component operation.

FAQ

What is the exact supply voltage threshold range for TPS3823-30DBVRG4?

The TPS3823-30DBVRG4 has a negative-going input threshold voltage (V_IT−) of 2.59V (min), 2.63V (typ), and 2.69V (max) across −40°C to 85°C. This 3.0V nominal threshold includes 50mV hysteresis to prevent oscillation during slow-rising or noisy supply conditions. The TPS3823-30DBVRG4 does not support adjustable thresholds - all variants use factory-trimmed internal dividers.

Does TPS3823-30DBVRG4 require external components for basic operation?

No, the TPS3823-30DBVRG4 requires zero external components for core supervision functionality. Its 3.0V threshold is set internally, MR includes a 90kΩ pullup, and the watchdog timer operates with only a WDI signal connection. A 0.1μF ceramic bypass capacitor on VDD is recommended but not mandatory per datasheet guidance for optimal noise immunity.

How does the watchdog timer behave if the WDI pin is left unconnected on TPS3823-30DBVRG4?

When WDI is floating, the TPS3823-30DBVRG4 automatically generates internal pulses to prevent watchdog timeout - ensuring RESET remains inactive. This default behavior avoids unintended system resets in configurations where watchdog monitoring is unused. To disable this mode, tie WDI to GND via a 1kΩ resistor.

Can TPS3823-30DBVRG4 drive a microcontroller reset pin directly?

Yes, the TPS3823-30DBVRG4 features an active-low push-pull RESET output capable of sinking ≥1.2mA at 0.4V (VOL), which meets or exceeds the reset pin requirements of most ARM, MSP430, and PIC microcontrollers. No external pull-up resistor is needed, simplifying interface design and reducing component count.

What is the maximum operating temperature rating for TPS3823-30DBVRG4?

The TPS3823-30DBVRG4 is characterized for operation from −40°C to +85°C ambient temperature. Unlike the TPS3823A-33 variant (rated to 125°C), the TPS3823-30DBVRG4 does not extend to automotive or extended industrial temperature ranges - its thermal specifications (R_θJA = 185°C/W) are validated only within the −40°C to 85°C range.