Texas Instruments TPS3837K33QDBVREP

Overview

TPS3837K33QDBVREP from Texas Instruments is a nano-power, precision voltage supervisor IC with active-high push-pull RESET output, 2.93 V threshold voltage, 220 nA typical supply current, and selectable 10 ms / 200 ms reset delay. It monitors 3.3 V supply rails in space-constrained, low-power systems such as radiation-tolerant avionics and extended-temperature industrial controllers.

For engineers reviewing the TPS3837K33QDBVREP datasheet, TPS3837K33QDBVREP pinout, TPS3837K33QDBVREP application, or TPS3837K33QDBVREP equivalent, this page delivers verified electrical parameters, military-grade temperature range (–40°C to 125°C), SOT-23-5 package layout, and direct alternatives for high-reliability embedded power sequencing.

Technical Context

The TPS3837K33QDBVREP integrates a bandgap reference, precision voltage divider, and refresh timer to generate a clean, glitch-free active-high RESET signal during power-up and brownout events. Its internal threshold is fixed at 2.93 V (±3% over full temperature range) with 40 mV hysteresis to prevent chatter near V_IT.

Delay timing is controlled externally via the CT pin: grounded for 10 ms nominal delay, tied to VDD for 200 ms nominal delay. Manual reset (MR) is active-low and internally pulled up with 33 kΩ, supporting external debounced push-button integration without additional components.

Key Specifications

Pinout & Package

TPS3837K33QDBVREP uses a 5-pin SOT-23 (DBV) package, 2.9 mm × 1.6 mm × 1.45 mm, RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3837K33QDBVREP, the MDBVREP variant adds –55°C operation at higher cost and longer lead time, while the QDBVR offers identical specs without EP qualification-making TPS3837K33QDBVREP the optimal balance of extended temperature, reliability features, and supply chain continuity for high-integrity systems.

Availability

TPS3837K33QDBVREP is available at Aetrix Electronics and suitable for avionics power sequencing, radiation-tolerant telemetry, and industrial motor drive controllers requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TPS3837K33QDBVREP 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 high-reliability ICs, with decades of heritage in space-grade and military-qualified components.

The TPS3837 family is designed for precision, ultra-low-power voltage supervision in mission-critical systems where supply integrity directly impacts functional safety and system uptime.

FAQ

What is the exact reset threshold voltage of TPS3837K33QDBVREP and its tolerance?

The TPS3837K33QDBVREP has a nominal reset threshold voltage of 2.93 V, with a guaranteed tolerance of ±3% over the full operating temperature range (–40°C to 125°C). This value is factory-trimmed and does not require external calibration. The device asserts RESET low when VDD falls below this threshold and releases it when VDD rises above it plus 40 mV hysteresis.

How does the CT pin configure the reset delay time in TPS3837K33QDBVREP?

In TPS3837K33QDBVREP, the CT pin selects between two factory-characterized delay times: connecting CT to GND configures a 10 ms nominal delay, while connecting CT to VDD configures a 200 ms nominal delay. No external capacitor is needed. The internal timer starts counting only after VDD exceeds the 2.93 V threshold, ensuring accurate timing independent of ramp rate.

Is TPS3837K33QDBVREP pin-compatible with other members of the TPS3836/3837/3838 family?

Yes, TPS3837K33QDBVREP shares identical 5-pin SOT-23 (DBV) pinout and footprint with all TPS3836/3837/3838-EP variants, including TPS3836J25MDBVTEP and TPS3838L30MDBVREP. However, output polarity differs: TPS3837 provides active-high push-pull, while TPS3836 is active-low push-pull and TPS3838 is active-low open-drain-requiring schematic review before substitution.

What is the maximum supply voltage rating for TPS3837K33QDBVREP?

The absolute maximum supply voltage (VDD) for TPS3837K33QDBVREP is 7 V, but TI specifies recommended operation up to 6 V. Continuous operation at 7 V is limited to 1000 hours per datasheet. For reliable long-term use, VDD should remain within 1.6 V to 6 V, with 3.3 V nominal operation matching its 2.93 V threshold design point.

Does TPS3837K33QDBVREP include manual reset functionality, and how is it implemented?

Yes, TPS3837K33QDBVREP includes an active-low manual reset (MR) input on Pin 3. It features an internal 33 kΩ pullup resistor, allowing direct connection of a momentary switch to GND. When MR is pulled low, RESET immediately asserts active-high regardless of VDD level. If unused, MR must be tied to VDD to minimize leakage current, as floating MR increases IDD by up to 350 µA.