Texas Instruments TPS3837K33DBVTG4

Overview

TPS3837K33DBVTG4 from Texas Instruments is a nano-power voltage supervisor IC with active-high push-pull RESET output, 2.93 V threshold voltage (V_IT), 220 nA typical supply current, and selectable 10 ms or 200 ms reset delay via CT pin - used for undervoltage monitoring in lithium-ion battery–powered MSP430 microcontroller systems.

For engineers reviewing the TPS3837K33DBVTG4 datasheet, TPS3837K33DBVTG4 pinout, TPS3837K33DBVTG4 application, or TPS3837K33DBVTG4 equivalent, key selection criteria include its active-high push-pull output eliminating external pull-up resistors, ultra-low quiescent current enabling multi-year battery life, precise 2.93 V supervision for 3.3 V nominal rails, and manual reset support for system-level recovery control.

Technical Context

The TPS3837K33DBVTG4 implements a precision bandgap-referenced comparator to monitor VDD against a fixed 2.93 V threshold with 40 mV hysteresis (V_HYS), ensuring noise immunity during brownout detection. Its internal timer initiates after VDD exceeds V_IT + V_HYS, with delay time set by CT pin logic level: GND = 10 ms, VDD = 200 ms.

It features active-high push-pull RESET output capable of sourcing up to 2 mA at 3.3 V, eliminating external biasing components. Manual reset (MR) input supports asynchronous assertion with 0.3 µs propagation delay, and the device operates across –40°C to 85°C with 1.6 V to 6 V supply range.

Key Specifications

Pinout & Package

TPS3837K33DBVTG4 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained portable designs. The package is RoHS-compliant, lead-free (NIPDAU), and rated MSL-1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3836K33DBVT and TPS3838K33DBVT, the TPS3837K33DBVTG4 provides direct compatibility with active-high reset inputs, eliminates external biasing, and maintains identical supervision accuracy and ultra-low power - making it optimal for new MSP430-based designs where reset polarity is unconstrained.

Availability

TPS3837K33DBVTG4 is available at Aetrix Electronics and suitable for portable medical sensors, lithium-ion battery management systems, and industrial wireless nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TPS3837K33DBVTG4 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 developed specifically for ultra-low-power voltage supervision in battery-operated microcontroller systems, emphasizing nanoscale quiescent current, factory-trimmed thresholds, and hardware-selectable timing - targeting MSP430, CC26xx, and other TI ultra-low-power platforms.

FAQ

What is the exact reset threshold voltage of the TPS3837K33DBVTG4?

The TPS3837K33DBVTG4 has a nominal threshold voltage (V_IT) of 2.93 V, with a guaranteed range of 2.84 V to 2.99 V over –40°C to 85°C. This value is factory-trimmed and specified in the Electrical Characteristics table of the SLVS292F datasheet. The 2.93 V threshold is selected to provide appropriate margin below a 3.3 V nominal supply while ensuring reliable detection before MCU functional failure.

Does the TPS3837K33DBVTG4 require an external pull-up resistor on the RESET pin?

No, the TPS3837K33DBVTG4 does not require an external pull-up resistor because it features an active-high push-pull RESET output. Unlike open-drain variants such as TPS3838K33DBVT, this device actively drives both logic high and logic low states, enabling direct connection to MCUs with active-high reset inputs - including the MSP430 series - without additional components.

How is the reset delay time configured on the TPS3837K33DBVTG4?

The reset delay time on the TPS3837K33DBVTG4 is configured solely by the voltage applied to the CT pin: connecting CT to GND selects a typical 10 ms delay, while connecting CT to VDD selects a typical 200 ms delay. No external capacitor is needed. This hardware-selectable timing eliminates firmware dependencies and ensures deterministic behavior across temperature and voltage variations.

What is the maximum supply voltage the TPS3837K33DBVTG4 can tolerate?

The TPS3837K33DBVTG4 has an absolute maximum VDD rating of 7 V, but its recommended operating range is 1.6 V to 6 V per the datasheet. Operation above 6 V risks permanent damage, and transient excursions beyond 7 V - even briefly - may cause latch-up or ESD structure failure. For 3.6 V Li-ion applications, no clamping is needed, but input filtering is advised if the supply is subject to switching noise or hot-swap events.

Is the TPS3837K33DBVTG4 compatible with the MSP430 microcontroller family?

Yes, the TPS3837K33DBVTG4 is explicitly designed for use with MSP430 microcontrollers. Its active-high RESET output matches the MSP430's native reset polarity, its 2.93 V threshold aligns with common 3.3 V supply rails used with these MCUs, and its 220 nA quiescent current preserves battery life in ultra-low-power sleep modes. The datasheet includes a dedicated "Applications using the MSP430™" section confirming this interoperability.