Texas Instruments TPS3808G15DRVT

Overview

TPS3808G15DRVT from Texas Instruments is a low-quiescent-current, programmable-delay supervisory circuit designed to monitor 1.5 V system rails and assert an open-drain RESET signal when the SENSE voltage drops below 1.40 V or MR is pulled low. It delivers 0.5% threshold accuracy, 2.4 μA typical supply current, and user-adjustable reset delay from 1.25 ms to 10 s via external capacitor on CT pin-ideal for battery-powered microcontroller power sequencing.

For engineers reviewing the TPS3808G15DRVT datasheet, TPS3808G15DRVT pinout, TPS3808G15DRVT application, or TPS3808G15DRVT equivalent, key selection criteria include its fixed 1.40 V threshold for 1.5 V rails, SOT-23-6 package compatibility, −40°C to 125°C operating range, and open-drain RESET output requiring external pull-up for interfacing with DSPs, FPGAs, and portable SoCs.

Technical Context

The TPS3808G15DRVT implements a precision voltage comparator with built-in hysteresis (1% of VIT) and an internal 220 nA current source that charges the external CT capacitor to set delay time. Its SENSE input monitors rail voltage directly without external divider, while MR provides asynchronous reset initiation with 90 kΩ internal pull-up.

RESET assertion is governed by dual conditions: SENSE falling below 1.40 V or MR driven below 0.3×VDD; de-assertion requires both SENSE > 1.40 V + hysteresis and MR > 0.7×VDD, followed by the full programmed delay. The device operates across 1.7–6.5 V supply and maintains 2.4 μA IDD over temperature.

Key Specifications

Pinout & Package

TPS3808G15DRVT is packaged in a 6-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size and standard JEDEC MO-178 footprint. Pin 1 is RESET; pin 2 is GND; pin 3 is MR; pin 4 is CT; pin 5 is SENSE; pin 6 is VDD.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar supervisory circuit applications.

Compared with TPS3808G15DRVT, TPS3808G15DBVR offers identical performance in a different reel format, while MAX6326LT14D3+T trades programmability and manual reset for compactness-making TPS3808G15DRVT optimal where timing adaptability and system-level reset control are required.

Availability

TPS3808G15DRVT is available at Aetrix Electronics and suitable for microcontroller power sequencing, FPGA configuration monitoring, and battery-powered IoT sensor nodes requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3808G15DRVT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.

The TPS3808 family was engineered specifically for low-power, high-accuracy voltage supervision in space- and energy-constrained embedded systems-emphasizing precision thresholding, ultra-low I_DD, and flexible reset timing.

FAQ

What is the exact threshold voltage of the TPS3808G15DRVT?

The TPS3808G15DRVT has a nominal threshold voltage of 1.40 V with ±0.5% accuracy over −40°C to 125°C. This value is factory-trimmed and applies specifically to the G15 variant, ensuring reliable detection of undervoltage on 1.5 V rails without external calibration. The TPS3808G15DRVT achieves this precision using an internal bandgap reference and laser-trimmed resistors.

How do I configure the reset delay time for the TPS3808G15DRVT?

The TPS3808G15DRVT reset delay is configured via the CT pin: leave it open for 20 ms, tie it to VDD through a 40–200 kΩ resistor for 300 ms, or connect a capacitor ≥100 pF from CT to GND for user-defined delay from 1.25 ms to 10 s. The TPS3808G15DRVT uses an internal 220 nA current source to charge the capacitor; delay = CT(nF) × 10⁻³ + 0.5 ms.

Does the TPS3808G15DRVT support manual reset functionality?

Yes, the TPS3808G15DRVT includes a dedicated MR (manual reset) input pin (pin 3) that asserts RESET when driven below 0.3×VDD. An internal 90 kΩ pull-up resistor allows MR to be left unconnected if unused. When MR is asserted, the TPS3808G15DRVT holds RESET low regardless of SENSE voltage, enabling system-level reset initiation by processors or pushbuttons.

What package type is used for the TPS3808G15DRVT?

The TPS3808G15DRVT uses a 6-pin SOT-23 (DBV) package with 2.90 mm × 1.60 mm body dimensions and standard MO-178 footprint. It is distinct from the WSON variant (DRV) and shares pinout compatibility with other TPS3808x DRVT-grade parts. The TPS3808G15DRVT's SOT-23 package supports reflow soldering per JEDEC J-STD-020 and is RoHS-compliant.

Can the TPS3808G15DRVT monitor voltages other than 1.5 V?

No-the TPS3808G15DRVT is factory-configured exclusively for 1.5 V rail supervision with a fixed 1.40 V threshold. To monitor other rails, select alternate variants: TPS3808G12 (1.2 V), TPS3808G33 (3.3 V), or TPS3808G01 (adjustable down to 0.405 V). The TPS3808G15DRVT does not support external resistor dividers on SENSE; its internal reference is trimmed for 1.40 V only.