Texas Instruments TPS3808G15DBVT

Overview

TPS3808G15DBVT 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 falls below 1.40 V threshold. It delivers 0.5% typical 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-enabling reliable power-on reset in battery-powered microcontroller systems.

For engineers reviewing the TPS3808G15DBVT datasheet, TPS3808G15DBVT pinout, TPS3808G15DBVT application, or TPS3808G15DBVT equivalent, key selection criteria include its fixed 1.40 V detection threshold, SOT-23-6 package compatibility, –40°C to 125°C operating range, open-drain RESET output with 0.4 V max VOL at 1 mA, and MR input with internal 90 kΩ pull-up for manual reset initiation.

Technical Context

The TPS3808G15DBVT implements a precision bandgap reference and comparator architecture to achieve ±0.5% threshold accuracy for VIT ≤ 3.3 V, with built-in hysteresis (1–2.5%) ensuring noise-immune reset assertion/deassertion. Its reset timing is controlled by an internal 220 nA current source charging an external CT capacitor to 1.23 V, enabling precise delay programming across temperature.

It operates over 1.7 V to 6.5 V supply range with supply current stable at 2.4 μA (typ) regardless of VDD within spec, and supports manual reset via MR pin-internally pulled up to VDD-while maintaining open-drain RESET output compatible with voltages up to 6.5 V via external pull-up.

Key Specifications

Pinout & Package

SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G15DBVT, TPS3808G15DBVR offers identical performance in volume packaging, while MAX6326LT15D2T trades flexibility (no MR, no CT) for slightly lower I_DD-making it viable only in constrained, fixed-timing designs where pin count and feature set allow.

Availability

TPS3808G15DBVT is available at Aetrix Electronics and suitable for microcontroller power-on reset, battery-powered IoT node supervision, FPGA configuration monitoring, industrial PLC I/O module reset control, and portable medical device power sequencing requiring stable component supply and long-term lifecycle support.

Supply support for TPS3808G15DBVT 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 precision voltage supervision in resource-constrained systems-targeting applications demanding ultra-low quiescent current, high threshold accuracy, and flexible reset timing without sacrificing thermal robustness or package size.

FAQ

What is the exact threshold voltage of the TPS3808G15DBVT?

The TPS3808G15DBVT has a nominal threshold voltage (V_IT) of 1.40 V, corresponding to supervision of a 1.5 V nominal supply rail. This value is factory-trimmed with ±0.5% typical accuracy over –40°C to 125°C, as specified in TI's SBVS050M datasheet Section 5 and confirmed in Electrical Characteristics Table 7.5.

Does the TPS3808G15DBVT support manual reset functionality?

Yes, the TPS3808G15DBVT includes a dedicated MR (manual reset) input (Pin 3) that is active-low and internally pulled up to VDD with a 90 kΩ resistor. Driving MR below 0.3×VDD asserts RESET immediately, and RESET remains asserted for the full programmed delay after MR returns high and SENSE exceeds 1.40 V.

What package type is used by the TPS3808G15DBVT?

The TPS3808G15DBVT uses the SOT-23-6 (DBV) package: a 6-pin, surface-mount, lead-free package with 2.90 mm × 1.60 mm body dimensions and 0.95 mm maximum height. Pin configuration matches Figure 6-1 in the TI datasheet, and thermal pad is not present-unlike the WSON variant.

Can the reset delay time of the TPS3808G15DBVT be adjusted, and how?

Yes, the TPS3808G15DBVT reset delay is fully adjustable from 1.25 ms to 10 s using an external capacitor on the CT pin (Pin 4). A ≥100 pF capacitor to GND sets the delay per equation t_D = C_T(nF) × 10⁻³ + 0.5 ms. Leaving CT open yields 20 ms; connecting CT to VDD via 40–200 kΩ yields 300 ms.

Is the TPS3808G15DBVT compatible with supply voltages higher than 1.5 V?

Yes, the TPS3808G15DBVT operates from 1.7 V to 6.5 V on VDD (Pin 6), independent of its 1.40 V SENSE threshold. It can supervise a 1.5 V rail while being powered from a higher voltage (e.g., 3.3 V or 5 V), and its open-drain RESET output supports pull-up to up to 6.5 V-enabling mixed-voltage system integration.