Texas Instruments TPS3808G30DBVRG4

Overview

TPS3808G30DBVRG4 from Texas Instruments is a low-quiescent-current, programmable-delay supervisory circuit designed to monitor 3.0-V system rails and assert an open-drain RESET signal when the SENSE voltage drops below 2.79 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-enabling reliable power-on reset in battery-powered microcontroller systems.

For engineers reviewing the TPS3808G30DBVRG4 datasheet, TPS3808G30DBVRG4 pinout, TPS3808G30DBVRG4 application, or TPS3808G30DBVRG4 equivalent, key selection criteria include its fixed 2.79-V threshold for 3.0-V rails, SOT-23-6 package compatibility, −40°C to 125°C operation, open-drain RESET output with external pull-up support up to 6.5 V, and manual reset (MR) input with 90-kΩ internal pull-up.

Technical Context

The TPS3808G30DBVRG4 implements a precision voltage comparator with built-in hysteresis (1%–2.5% of V_IT) and a programmable timer driven by a 220-nA on-chip current source charging the CT pin capacitor. Its SENSE input monitors rail voltage directly without external divider for fixed-threshold variants, while MR provides asynchronous reset initiation independent of supply monitoring.

RESET assertion is governed by a truth table: low only when SENSE ≤ V_IT or MR = logic low; deassertion requires both SENSE > V_IT + V_HYS and MR = logic high, followed by the full programmed delay. The device operates across 1.7–6.5 V supply range and maintains functional reset behavior down to −40°C, with thermal performance characterized by R_θJA = 180.9°C/W in SOT-23.

Key Specifications

Pinout & Package

SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, lead-free, RoHS-compliant, moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G30DBVRG4, TPS3808G33DBVR serves different rail voltages and MAX6326UT30D3+ trades configurability for ultra-low current and reduced pin count-making TPS3808G30DBVRG4 optimal for 3.0-V systems requiring field-programmable timing and manual intervention capability.

Availability

TPS3808G30DBVRG4 is available at Aetrix Electronics and suitable for microcontroller power-on reset, battery-powered sensor nodes, FPGA configuration sequencing, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges.

Supply support for TPS3808G30DBVRG4 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 power management, signal chain, and microcontrollers.

The TPS3808 family is engineered for high-accuracy, low-power system supervision in space-constrained, thermally demanding applications-targeting portable electronics, industrial automation, and automotive subsystems.

FAQ

What is the exact threshold voltage of the TPS3808G30DBVRG4 and how is it calibrated?

The TPS3808G30DBVRG4 has a factory-trimmed threshold voltage of 2.79 V, optimized for monitoring 3.0-V nominal rails. This value is achieved using a precision internal reference and laser trimming during production, delivering ±0.5% typical accuracy across −40°C to 125°C junction temperature. The TPS3808G30DBVRG4 does not require external calibration or resistor dividers for this fixed threshold.

Can the TPS3808G30DBVRG4 be used to monitor voltages other than 3.0 V?

No-the TPS3808G30DBVRG4 is a fixed-threshold variant specifically configured for 3.0-V rails (V_IT = 2.79 V). To monitor other voltages, select alternate members of the TPS3808 family such as TPS3808G12 (1.12 V), TPS3808G33 (3.07 V), or the adjustable TPS3808G01 (0.405 V minimum). Using TPS3808G30DBVRG4 outside its specified 3.0-V context risks incorrect reset assertion timing.

How is the reset delay time configured on the TPS3808G30DBVRG4?

The reset delay on the TPS3808G30DBVRG4 is set via the CT pin: leaving CT open yields a fixed 20-ms delay; connecting CT to VDD through a 40–200-kΩ resistor gives 300 ms; connecting CT to ground via a ≥100-pF capacitor enables user-programmable delays from 1.25 ms to 10 s. The TPS3808G30DBVRG4 uses an internal 220-nA current source to charge the capacitor, ensuring predictable timing independent of supply voltage.

Does the TPS3808G30DBVRG4 support manual reset functionality, and how is it implemented?

Yes-the TPS3808G30DBVRG4 includes a dedicated MR (manual reset) input (Pin 3) that asserts RESET when driven to logic low (≤0.3×VDD). An internal 90-kΩ pull-up resistor ties MR to VDD, allowing the pin to float if unused. This feature enables external control of reset timing-for example, linking MR to a watchdog timer output or pushbutton switch-without affecting the SENSE monitoring function.

What package type and footprint does the TPS3808G30DBVRG4 use?

The TPS3808G30DBVRG4 is supplied in the SOT-23-6 (DBV) package: a 2.90-mm × 1.60-mm surface-mount outline with gull-wing leads, RoHS-compliant, and moisture sensitivity level 1 (MSL-1). Its pinout is standardized across the TPS3808 family, enabling drop-in replacement with other DBV-packaged variants like TPS3808G33DBVR or TPS3808G12DBVR when board layout permits.