Texas Instruments TPS3808G15DRVR

Overview

TPS3808G15DRVR 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-enabling reliable power-on reset in battery-powered microcontroller systems.

For engineers reviewing the TPS3808G15DRVR datasheet, TPS3808G15DRVR pinout, TPS3808G15DRVR application, or TPS3808G15DRVR equivalent, key selection considerations include its fixed 1.40 V threshold for 1.5 V rails, WSON-6 (2 mm × 2 mm) package with thermal pad, −40°C to 125°C operation, and compatibility with manual reset assertion and capacitor-programmable timing.

Technical Context

The TPS3808G15DRVR implements a precision bandgap reference and comparator with built-in hysteresis to ensure stable SENSE monitoring and noise-immune RESET assertion. Its internal 220 nA current source charges the external CT capacitor to set delay time, while the 90 kΩ internal MR pull-up resistor enables optional manual reset without external components.

It operates across 1.7 V to 6.5 V supply range, supports SENSE input up to 6.5 V independent of VDD, and features open-drain RESET output compatible with pull-up voltages up to 6.5 V-making it suitable for mixed-voltage FPGA and ASIC power sequencing where rail independence and low leakage are critical.

Key Specifications

Pinout & Package

TPS3808G15DRVR is packaged in a thermally enhanced 6-pin WSON (DRV) package measuring 2.00 mm × 2.00 mm with exposed thermal pad. The package supports reflow soldering per JEDEC Level-1-260°C and provides low junction-to-board thermal resistance (135°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G15DRVR, the SOT-23 variant trades thermal performance for legacy footprint compatibility, while the MAX6326 offers lower current but sacrifices programmability and accuracy-making TPS3808G15DRVR optimal for designs requiring precision, configurability, and robust thermal management in compact layouts.

Availability

TPS3808G15DRVR is available at Aetrix Electronics and suitable for microcontroller power sequencing, battery-powered IoT nodes, FPGA configuration safety, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3808G15DRVR 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 specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability ICs.

The TPS3808 family is engineered for precision voltage monitoring in resource-constrained systems-delivering ultra-low-power supervision with factory-trimmed thresholds and flexible timing for microcontrollers, FPGAs, and ASICs in automotive, industrial, and portable applications.

FAQ

What is the exact threshold voltage of the TPS3808G15DRVR and how is it trimmed?

The TPS3808G15DRVR has a nominal threshold voltage of 1.40 V, corresponding to a 1.5 V supply rail. This value is factory-trimmed using TI's precision bandgap reference and achieves ±0.5% accuracy over −40°C to 125°C. The trim is performed during wafer sort and verified per device, not via external components-ensuring consistent performance without calibration.

Can the TPS3808G15DRVR monitor voltages other than 1.5 V?

Yes, the TPS3808G15DRVR can monitor voltages outside the 1.5 V rail using an external resistor divider on the SENSE pin. While its internal threshold is fixed at 1.40 V, connecting a voltage divider allows scaling higher or lower rails (e.g., 3.3 V or 0.8 V) to match that threshold. The device supports SENSE inputs from 0 V to 6.5 V, independent of VDD.

How does the CT pin configure reset delay on the TPS3808G15DRVR?

The CT pin on the TPS3808G15DRVR sets reset delay via three configurations: open circuit yields 20 ms, connection to VDD through a 40–200 kΩ resistor yields 300 ms, and connection to a ground-referenced capacitor (≥100 pF) enables user-defined delays from 1.25 ms to 10 s. The internal 220 nA current source charges the capacitor to 1.23 V to terminate the delay.

Is the TPS3808G15DRVR compatible with 1.8 V microcontroller reset inputs?

Yes, the TPS3808G15DRVR's open-drain RESET output is fully compatible with 1.8 V microcontroller reset inputs. By using a pull-up resistor to 1.8 V (e.g., 10 kΩ), the RESET line operates at that voltage level. The output can tolerate up to 6.5 V, allowing seamless interfacing across mixed-voltage domains without level shifters.

Does the TPS3808G15DRVR require external components for basic operation?

For basic operation, the TPS3808G15DRVR requires only a 0.1 μF ceramic capacitor on VDD and a pull-up resistor (10 kΩ–1 MΩ) on RESET. The MR pin may be left floating (due to internal 90 kΩ pull-up), and CT can be left open for 20 ms delay-eliminating external timing components unless custom delay is needed.