Texas Instruments TPS3806J20DBVT

Overview

TPS3806J20DBVT 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 - used for Li-ion battery voltage monitoring and power-on reset assertion in portable electronics.

For engineers reviewing the TPS3806J20DBVT datasheet, TPS3806J20DBVT pinout, TPS3806J20DBVT application, or TPS3806J20DBVT equivalent, key selection criteria include dual-threshold hysteresis configuration, guaranteed reset assertion down to 0.8 V VDD, SOT-23-6 package compatibility, and low-quiescent-current supervision for battery-powered systems.

Technical Context

The TPS3806J20DBVT 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 battery voltage tracking. HSENSE provides an external input to set upper hysteresis, allowing programmable window detection between LSENSE and HSENSE thresholds.

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. The internal reference stability is maintained via on-chip voltage divider and bypass capacitor recommendation (0.1 µF ceramic).

Key Specifications

Pinout & Package

TPS3806J20DBVT is housed in a 6-pin SOT-23 (DBV) package, 2.9 mm × 1.6 mm × 1.45 mm, with gull-wing leads and RoHS-compliant NiPdAu finish (MSL Level-1, 260°C peak reflow). Pin 1 is marked by an index area and located in quadrant Q3 of the tape reel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3806I33DBVT, the TPS3806J20DBVT provides lower VDD trip for 1.8 V logic domains; compared with MAX6326UT29D3+T, it adds battery-specific supervision and hysteresis tuning - making it uniquely suited for multi-rail portable designs requiring independent reset signaling.

Availability

TPS3806J20DBVT is available at Aetrix Electronics and suitable for smartphone battery management, wearable health monitors, industrial handheld scanners, and Bluetooth audio earbuds requiring stable component supply and long-term lifecycle support.

Supply support for TPS3806J20DBVT 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 over 50 years of leadership in precision analog IC design.

The TPS3806 family is designed for high-accuracy, ultra-low-power voltage supervision in battery-critical portable electronics - delivering dual-threshold detection, programmable hysteresis, and guaranteed low-VDD reset in minimal SOT-23 footprint.

FAQ

What is the exact VDD threshold voltage for TPS3806J20DBVT?

The TPS3806J20DBVT has a fixed VDD threshold (VIT) of 1.8 V, specified over temperature as 1.764 V (min) to 1.836 V (max) at -40°C to +85°C. This value is factory-trimmed and does not require external configuration. The TPS3806J20DBVT uses this threshold to assert the RESET output when VDD falls below the trip point, ensuring reliable power-on reset behavior even during brownout conditions.

How is the LSENSE threshold set on TPS3806J20DBVT?

TPS3806J20DBVT features an internal 1.207 V reference applied to the LSENSE input; users set the actual battery trip voltage using an external resistor divider network connected between the battery rail and GND, with LSENSE tied to the divider midpoint. The TPS3806J20DBVT's LSENSE input draws only ±25 nA, minimizing loading error. Equation 1 in the datasheet defines the relationship: V(LSENSE) = 1.207 V × (R2 + R3) / (R1 + R2 + R3).

Does TPS3806J20DBVT support hysteresis, and how is it configured?

Yes, TPS3806J20DBVT supports adjustable hysteresis via the HSENSE pin, which sets the upper threshold for the LSENSE comparator. Hysteresis width depends on the programmed VIT range: 60 mV for thresholds between 1.2 V and 2.5 V, or 90 mV for 2.5 V to 3.5 V. The TPS3806J20DBVT uses Equation 2 (V(HSENSE) = 1.207 V × (R1 + R2 + R3) / R3) to calculate the required resistor values for desired window size.

What are the absolute maximum ratings for TPS3806J20DBVT?

TPS3806J20DBVT has an absolute maximum supply voltage (VDD) of 7 V, input voltage limits of -0.3 V to (VDD + 0.3) V on all other pins, and continuous power dissipation of 227 mW at +85°C (DBV package). Exceeding these ratings may cause permanent damage. The TPS3806J20DBVT must not be operated continuously at 7 V for more than 1000 hours, per TI's reliability guidance in the datasheet.

Can TPS3806J20DBVT be used with lithium-polymer batteries?

Yes, TPS3806J20DBVT is commonly used with Li-po batteries, as its 1.207 V internal reference and adjustable LSENSE input allow precise configuration of discharge cutoff (e.g., 3.0 V) and charge termination (via HSENSE) thresholds. The TPS3806J20DBVT's -40°C to +85°C operating range covers full Li-po environmental use cases, and its 3 µA supply current avoids measurable impact on battery self-discharge rate.