Texas Instruments TPS3836H30DBVR

Overview

TPS3836H30DBVR from Texas Instruments is a nano-power voltage supervisor IC with active-low push-pull RESET output, 2.79 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 and system reset initiation in battery-powered microcontroller applications.

For engineers reviewing the TPS3836H30DBVR datasheet, TPS3836H30DBVR pinout, TPS3836H30DBVR application, or TPS3836H30DBVR equivalent, key selection criteria include precise 2.79 V supervision threshold, ultra-low quiescent current, SOT-23-5 package compatibility, manual reset support, and push-pull output eliminating external pull-up requirements.

Technical Context

The TPS3836H30DBVR implements a precision band-gap referenced comparator to monitor VDD against a fixed 2.79 V threshold (±1.5% over –40°C to 85°C), with 40 mV hysteresis (V_HYS) ensuring noise immunity during voltage transitions. Its internal timer initiates reset assertion only after VDD falls below V_IT, and deassertion only after VDD rises above V_IT + V_HYS and sustains for the selected delay period.

Reset delay timing is determined solely by the CT pin state: grounded for 10 ms (typical), tied to VDD for 200 ms (typical). The MR input provides asynchronous active-low manual reset with 0.3 µs propagation delay, while the push-pull RESET output drives logic-low during fault and logic-high during normal operation without external components.

Key Specifications

Pinout & Package

TPS3836H30DBVR 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 TPS3836K33DBVR and MAX6375XR27-T, the TPS3836H30DBVR delivers optimal trade-off of 2.79 V threshold accuracy, 220 nA ultra-low power, and push-pull output - making it uniquely suited for long-life 3.0 V nominal battery systems where precise undervoltage detection and minimal BOM are critical.

Availability

TPS3836H30DBVR is available at Aetrix Electronics and suitable for portable medical sensors, lithium-ion battery management, industrial wireless nodes, and MSP430-based data loggers requiring stable component supply across extended production lifecycles.

Supply support for TPS3836H30DBVR 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 signal chain and power management technologies.

The TPS3836H30DBVR belongs to TI's nano-power voltage supervisor product line, engineered specifically for battery-critical applications demanding sub-µA quiescent current, precise threshold accuracy, and robust reset timing control.

FAQ

What is the exact threshold voltage of the TPS3836H30DBVR and how tightly is it specified?

The TPS3836H30DBVR has a nominal threshold voltage (V_IT) of 2.79 V, with a maximum deviation of ±1.5% over the full –40°C to +85°C operating temperature range. This specification is guaranteed per TI's production test flow and documented in Section 7.6 of the SLVS292F datasheet. The 2.79 V value is factory-trimmed and does not require external calibration. The TPS3836H30DBVR achieves this precision using an internal band-gap reference and laser-trimmed resistor network, ensuring consistent performance across units and temperature.

Does the TPS3836H30DBVR require an external pull-up resistor on the RESET pin?

No, the TPS3836H30DBVR does not require an external pull-up resistor on the RESET pin because it features an active-low push-pull output stage. Unlike open-drain supervisors, the TPS3836H30DBVR actively drives RESET high (logic 1) during normal operation and low (logic 0) during reset assertion. This eliminates the need for external biasing components, reduces BOM count, and guarantees defined logic levels under all conditions - a key advantage confirmed in the "Reset Output" section of the TPS3836H30DBVR datasheet.

How is the reset delay time configured on the TPS3836H30DBVR?

The reset delay time on the TPS3836H30DBVR is configured exclusively via 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 or resistor is required. This hardware-selectable timing is implemented using an internal RC oscillator whose frequency is switched by the CT pin voltage level. The delay begins only after VDD rises above V_IT + V_HYS and MR is high, as verified in the timing diagram (Figure 7) and Section 9.3.3 of the TPS3836H30DBVR datasheet.

Can the TPS3836H30DBVR supervise supplies below 1.8 V?

No, the TPS3836H30DBVR is not specified to supervise supplies below 1.6 V. Its absolute minimum operating supply voltage is 1.6 V (per Section 7.4 Recommended Operating Conditions), and its internal circuitry requires ≥1.1 V to assert initial power-on reset. While the device may function intermittently down to ~1.3 V, TI does not guarantee parameter performance or reset reliability below 1.6 V. For sub-1.8 V supervision, TI recommends the TPS3836E18DBVR (1.8 V variant) or alternative nano-supervisors like TPS3890, both explicitly characterized for lower thresholds.

What is the maximum supply voltage the TPS3836H30DBVR can tolerate on the VDD pin?

The TPS3836H30DBVR has an absolute maximum VDD rating of 7 V, as stated in Section 7.1 Absolute Maximum Ratings. However, the recommended operating range is 1.6 V to 6 V. Exceeding 6 V - even briefly - risks violating the device's safe operating area and may cause parametric shift or latent failure. Applications with potential transients (e.g., automotive load dump, hot-swap events) must include external clamping (e.g., TVS diode) to ensure VDD never exceeds 7 V, as emphasized in Section 11 Power Supply Recommendations of the TPS3836H30DBVR datasheet.