Texas Instruments TPS3806J20DBVR

Overview

TPS3806J20DBVR from Texas Instruments is a dual voltage detector IC with fixed 1.8 V VDD-sense threshold and adjustable 1.207 V LSENSE threshold, featuring independent open-drain RESET and RSTSENSE outputs, 3 µA typical supply current at 3.3 V, and operation from -40°C to +85°C in a 6-pin SOT-23 package - used for battery voltage monitoring and power-on reset assertion in portable Li-ion systems.

For engineers reviewing the TPS3806J20DBVR datasheet, TPS3806J20DBVR pinout, TPS3806J20DBVR application, or TPS3806J20DBVR equivalent, key selection criteria include dual-threshold hysteresis configuration, guaranteed reset assertion down to 0.8 V VDD, low quiescent current, open-drain output drive capability, and SOT-23 footprint compatibility with space-constrained battery-powered designs.

Technical Context

The TPS3806J20DBVR integrates two independent comparators: one monitors VDD against a fixed 1.8 V threshold (VIT), while the other monitors LSENSE against an internal 1.207 V reference, enabling precise low-voltage battery sensing. HSENSE provides an external input to set upper hysteresis via resistor divider, establishing a programmable window between LSENSE and HSENSE trip points.

Both RESET and RSTSENSE are active-low open-drain outputs requiring external pull-up resistors; propagation delays are 5–100 µs across temperature, and the device asserts reset reliably at VDD ≥ 0.8 V during power-up. Input leakage at LSENSE/HSENSE is ±25 nA, supporting high-impedance sensing networks up to 1 MΩ total resistance.

Key Specifications

Pinout & Package

TPS3806J20DBVR is housed in a 6-pin SOT-23 (DBV) package measuring 2.9 mm × 1.6 mm × 1.45 mm max height, with GND on Pin 2, VDD on Pin 4, RESET on Pin 3, RSTSENSE on Pin 1, LSENSE on Pin 5, and HSENSE on Pin 6 - fully compatible with JEDEC MO-178 standard land patterns.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-threshold voltage detection applications.

Compared with TPS3806I33DBVR and MAX6326UT29D3+, the TPS3806J20DBVR uniquely supports 1.8 V VDD supervision alongside independent 1.207 V battery sensing - making it the only option among the three for mixed 1.8 V/low-battery architectures requiring hysteresis control.

Availability

TPS3806J20DBVR is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT sensors, industrial handheld instruments, and embedded microcontroller systems requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TPS3806J20DBVR 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 company specializing in analog, embedded processing, and power management technologies, with leadership in precision analog ICs and industrial-grade reliability.

The TPS3806 family is designed for dual-rail voltage supervision in battery-critical applications - specifically targeting portable electronics where independent monitoring of system supply and battery voltage is essential for safety and longevity.

FAQ

What is the exact VDD threshold voltage of the TPS3806J20DBVR?

The TPS3806J20DBVR has a fixed VDD threshold voltage of 1.8 V, with a tolerance of ±13 mV (1.787 V to 1.813 V) at +25°C and ±36 mV (-40°C to +85°C). This threshold is internally generated and does not require external components. The TPS3806J20DBVR guarantees reset assertion when VDD rises above this value during power-up, and maintains reset until VDD exceeds the threshold by hysteresis margin.

How is the LSENSE threshold set in the TPS3806J20DBVR?

The LSENSE threshold in the TPS3806J20DBVR is fixed at 1.207 V, derived from an internal precision bandgap reference. It is not externally adjustable as a voltage, but the effective trip point is set by a resistor divider between battery and ground, with LSENSE connected to the divider midpoint. The TPS3806J20DBVR compares this divided voltage to its internal 1.207 V reference to determine RSTSENSE state.

Can the TPS3806J20DBVR monitor two different battery voltages simultaneously?

No - the TPS3806J20DBVR monitors one battery voltage via LSENSE and one system supply voltage via VDD. While LSENSE supports adjustable thresholds through external resistor dividers, it is a single input node. To supervise multiple independent batteries, separate TPS3806J20DBVR units or a multi-channel supervisor like the TPS3808G33 would be required. The TPS3806J20DBVR is optimized for dual-rail (VDD + battery) supervision, not multi-battery systems.

What is the maximum recommended supply voltage for the TPS3806J20DBVR?

The absolute maximum supply voltage (VDD) for the TPS3806J20DBVR is 7 V, but TI specifies a recommended operating maximum of 6 V for continuous use. Operation at 7 V is limited to ≤1000 hours to ensure long-term reliability. For robust design, keep VDD ≤6 V; the TPS3806J20DBVR delivers full performance across 1.3 V to 6 V, including guaranteed reset at VDD ≥0.8 V during startup.

Does the TPS3806J20DBVR require external pull-up resistors on its outputs?

Yes - both RESET and RSTSENSE outputs of the TPS3806J20DBVR are active-low open-drain MOSFETs and require external pull-up resistors to define the high logic level. Typical values range from 10 kΩ to 100 kΩ, selected based on rise time requirements and bus loading. Without pull-ups, the outputs remain floating and cannot drive downstream logic; this is a fundamental requirement explicitly stated in the TPS3806J20DBVR functional description and typical operating circuits.