Texas Instruments TPS3809L30DBVTG4

Overview

TPS3809L30DBVTG4 from Texas Instruments is a 3-pin SOT-23 precision supply voltage supervisor IC designed for power-on reset and undervoltage monitoring in processor-based systems. It features a fixed 2.64 V threshold voltage (V_IT–), 200 ms reset delay (t_d), 9 μA typical supply current, push-pull RESET output, and operates across –40°C to +85°C. It is used in servers and industrial motor drives to ensure reliable system initialization.

For engineers reviewing the TPS3809L30DBVTG4 datasheet, TPS3809L30DBVTG4 pinout, TPS3809L30DBVTG4 application, or TPS3809L30DBVTG4 equivalent, this page delivers verified specifications, validated pin functions, real-world use cases, and two confirmed alternative parts with documented technical and application differences.

Technical Context

The TPS3809L30DBVTG4 implements a precision bandgap reference and comparator-based supervision architecture that asserts active-low RESET when V_DD falls below 2.64 V (±30 mV hysteresis) and holds it for ≥120 ms after V_DD rises above threshold. Its internal timer ensures deterministic reset timing without external components.

This device integrates a 1.137 V internal reference, low-leakage input stage, and push-pull output capable of sinking 5 mA. It requires no external capacitor for timing and supports supply voltages from 2 V to 6 V, making it suitable for 3.3 V and mixed-voltage embedded systems.

Key Specifications

Pinout & Package

SOT-23 (DBV) package: 3-pin surface-mount, 2.90 mm × 1.60 mm body size, 1.45 mm max height, JEDEC MO-178 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809E30DBVR and MAX809SEUR+T, the TPS3809L30DBVTG4 offers superior threshold accuracy (±3% vs. ±4%), integrated push-pull output eliminating external components, and higher absolute maximum supply rating (6.5 V), making it optimal for industrial 3.3 V systems demanding robustness and minimal BOM.

Availability

TPS3809L30DBVTG4 is available at Aetrix Electronics and suitable for factory automation, motor drives, and electricity meters requiring stable component supply with guaranteed long-term sourcing and full traceability.

Supply support for TPS3809L30DBVTG4 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 connectivity technologies with over 90 years of innovation in industrial, automotive, and communications markets.

The TPS3809 family was engineered specifically for cost-sensitive, space-constrained processor reset applications in industrial and infrastructure equipment-emphasizing precision, low power, and zero-component timing.

FAQ

What is the exact threshold voltage of the TPS3809L30DBVTG4?

The TPS3809L30DBVTG4 has a nominal negative-going input threshold voltage (V_IT–) of 2.64 V, with a guaranteed range of 2.58 V to 2.70 V over –40°C to +85°C. This value is factory-trimmed and fixed-no external adjustment is possible. The 35 mV hysteresis prevents chatter during slow or noisy supply transitions, and the specification is fully validated per TI's SLVS228D datasheet Section 7.4.

Does the TPS3809L30DBVTG4 require an external pull-up resistor on the RESET pin?

No, the TPS3809L30DBVTG4 features a push-pull RESET output (Pin 2), which actively drives high or low without external components. Unlike open-drain supervisors such as MAX809, it does not require a pull-up resistor-reducing BOM count and ensuring fast, deterministic release timing. This behavior is confirmed in the Pin Functions table (Section 6) and Electrical Characteristics (V_OH/V_OL) of the official datasheet.

What is the reset delay time of the TPS3809L30DBVTG4 and how is it implemented?

The TPS3809L30DBVTG4 provides a fixed 200 ms typical delay time (t_d) between V_DD rising above 2.64 V and RESET deassertion. This delay is generated by an internal timer-no external capacitor or resistor is needed. The minimum and maximum values are 120 ms and 280 ms respectively, ensuring reliable processor initialization across voltage and temperature variations per Section 7.5 of the SLVS228D datasheet.

Is the TPS3809L30DBVTG4 pin-compatible with the MAX809 series?

Yes, the TPS3809L30DBVTG4 is explicitly pin-for-pin compatible with the MAX809 family (e.g., MAX809SEUR+T) in the SOT-23 package. Pin 1 = GND, Pin 2 = RESET, Pin 3 = VDD. However, unlike the open-drain MAX809, the TPS3809L30DBVTG4 uses a push-pull output-so existing designs using MAX809 may retain their pull-up resistor but will function correctly without modification.

What is the maximum supply voltage rating for the TPS3809L30DBVTG4?

The TPS3809L30DBVTG4 has an absolute maximum supply voltage (V_DD) rating of 6.5 V, as specified in Section 7.1 of the SLVS228D datasheet. For reliable continuous operation, TI recommends limiting V_DD to ≤6 V per Recommended Operating Conditions (Section 7.2). Exceeding 6.5 V risks permanent damage, and operation at 6.5 V should not exceed 1000 hours total lifetime.