Texas Instruments TPS3837J25DBVR

Overview

TPS3837J25DBVR from Texas Instruments is a nano-power voltage supervisor IC with active-high push-pull RESET output, 2.25 V threshold voltage (V_IT), 10 ms/200 ms selectable reset delay via CT pin, and 220 nA typical supply current. It monitors supply rails in ultra-low-power systems such as battery-powered microcontrollers and MSP430-based designs.

For engineers reviewing the TPS3837J25DBVR datasheet, TPS3837J25DBVR pinout, TPS3837J25DBVR application, or TPS3837J25DBVR equivalent, key selection criteria include its precise 2.25 V supervision level, manual reset (MR) support, CT-configurable delay, SOT-23-5 package compatibility, and operation across –40°C to 85°C.

Technical Context

The TPS3837J25DBVR implements a precision band-gap reference and comparator-based supervision architecture with hysteresis (V_HYS = 40 mV for 2.5 V threshold variants). Its internal timer initiates after V_DD exceeds V_IT + V_HYS, and delay timing (t_D) is set by CT pin logic level-GND yields ~10 ms, V_DD yields ~200 ms.

It features an active-high push-pull RESET output requiring no external pull-up, manual reset input with internal 30 kΩ pull-up, and propagation delays of t_PLH = 10 µs (V_DD→RESET) and t_PLH = 0.3 µs (MR→RESET), enabling fast fault response and clean system initialization.

Key Specifications

Pinout & Package

TPS3837J25DBVR is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained PCB layouts and compatible with standard pick-and-place assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3837J25DBVR, TPS3836J25DBVR provides identical supervision accuracy and power efficiency but demands active-low MCU reset compatibility, while TPS3838J25DBVR adds wiring flexibility at the cost of added component count and static current overhead.

Availability

TPS3837J25DBVR is available at Aetrix Electronics and suitable for portable medical sensors, MSP430-based data loggers, wireless IoT endpoints, industrial handheld terminals, and battery-backed real-time clocks requiring stable component supply and long-term manufacturability.

Supply support for TPS3837J25DBVR 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 delivering analog and embedded processing solutions, with leadership in low-power design, precision analog, and industrial-grade reliability.

The TPS383x family was designed specifically for ultra-low-power voltage supervision in battery-critical applications-emphasizing nano-ampere quiescent current, factory-trimmed thresholds, and hardware-selectable timing without firmware dependency.

FAQ

What is the exact reset threshold voltage of the TPS3837J25DBVR?

TPS3837J25DBVR has a nominal threshold voltage (V_IT) of 2.25 V, with a typical tolerance of ±1.5% over the full –40°C to +85°C operating temperature range. This value is factory-trimmed and specified in the Electrical Characteristics table under "Negative-going input threshold voltage" for the J25 variant.

How do I configure the reset delay time on the TPS3837J25DBVR?

To configure the reset delay on TPS3837J25DBVR, connect the CT pin to GND for a typical 10 ms delay or to VDD for a typical 200 ms delay. The CT pin is high-impedance (<25 nA leakage), so direct connection without series resistance is recommended. No external capacitor is required.

Does the TPS3837J25DBVR require an external pull-up resistor on the RESET pin?

No, the TPS3837J25DBVR does not require an external pull-up resistor because it features an active-high push-pull RESET output. The output actively drives high (≈VDD) when inactive and low (≤0.4 V at 2 mA) when asserted, eliminating the need for external biasing components.

Can the TPS3837J25DBVR supervise a 1.8 V supply rail?

No, TPS3837J25DBVR is specifically configured for 2.5 V nominal supply supervision with a 2.25 V threshold. For 1.8 V rails, use TPS3837E18DBVR (1.71 V threshold). Using TPS3837J25DBVR on a 1.8 V rail would cause continuous RESET assertion since V_DD remains below V_IT.

What is the maximum supply voltage rating for the TPS3837J25DBVR?

The absolute maximum supply voltage (V_DD) for TPS3837J25DBVR is 7 V, per the Absolute Maximum Ratings table. However, the Recommended Operating Conditions specify a maximum of 6 V. Operation above 6 V risks parametric degradation or permanent damage, even if below 7 V.