Texas Instruments TPS3808G01DRVT

Overview

TPS3808G01DRVT from Texas Instruments is a low-quiescent-current, adjustable-threshold supervisory circuit that monitors system voltages down to 0.405 V and asserts an open-drain RESET signal upon undervoltage or manual reset assertion. It delivers 0.5% threshold accuracy (≤3.3 V), 2.4 μA typical supply current, and user-programmable reset delay from 1.25 ms to 10 s via external capacitor on CT pin - enabling precise power-on reset control in battery-powered microcontroller systems.

For engineers reviewing the TPS3808G01DRVT datasheet, TPS3808G01DRVT pinout, TPS3808G01DRVT application, or TPS3808G01DRVT equivalent, key selection considerations include its adjustable 0.405 V sense 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 90 kΩ internal pullup - all critical for reliable embedded system reset sequencing.

Technical Context

The TPS3808G01DRVT implements a precision voltage comparator with built-in hysteresis (1.5–3% of VIT) and an on-chip 220 nA current source that charges the external CT capacitor to generate programmable reset delay. Its SENSE input accepts any monitored rail ≥0.405 V via external resistor divider, while the MR input supports logic-level reset initiation with internal 90 kΩ pullup.

RESET assertion is governed by dual conditions: SENSE falling below VIT or MR driven low. Deassertion requires both SENSE > VIT + VHYS and MR high, followed by the full CT-programmed delay. The device operates across 1.7–6.5 V VDD and maintains 2.4 μA typical IDD independent of CT configuration - confirming true low-power supervision architecture.

Key Specifications

Pinout & Package

TPS3808G01DRVT is packaged in a 6-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size and standard lead finish. Pin 1 is RESET (open-drain output), Pin 2 is GND, Pin 3 is MR (manual reset input), Pin 4 is CT (delay programming), Pin 5 is SENSE (voltage monitor input), and Pin 6 is VDD (supply input).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G01DRVT, TPS3808G01DBVR offers identical supervision performance in a volume-optimized reel format, while MAX6326UT29D3+T trades adjustability and ultra-low current for smaller size and lower unit cost in fixed-threshold applications.

Availability

TPS3808G01DRVT is available at Aetrix Electronics and suitable for microcontroller power sequencing, battery-powered IoT sensors, FPGA configuration integrity, and automotive infotainment power management requiring stable component supply across extended product lifecycles.

Supply support for TPS3808G01DRVT 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 and embedded processing solutions, with over 90,000 products serving industrial, automotive, and personal electronics markets.

The TPS3808 family is designed specifically for precision voltage supervision in resource-constrained embedded systems - emphasizing ultra-low quiescent current, wide input voltage range, and flexible reset timing to meet stringent power and reliability requirements.

FAQ

What is the minimum adjustable threshold voltage supported by the TPS3808G01DRVT?

The TPS3808G01DRVT supports a minimum adjustable threshold voltage of 0.405 V on its SENSE pin. This is achieved using an external resistor divider network connected to the SENSE input, allowing precise monitoring of ultra-low-voltage rails such as modern FPGA cores and advanced SoC domains. The device maintains ±0.5% threshold accuracy for VIT ≤ 3.3 V, ensuring reliable reset behavior even at this minimum setting. TPS3808G01DRVT's internal reference and comparator architecture enable this capability without external components beyond the divider resistors.

How does the CT pin configure the reset delay time in the TPS3808G01DRVT?

The CT pin on the TPS3808G01DRVT controls reset delay through three distinct configurations: leaving CT open yields a fixed 20 ms delay; connecting CT to VDD via a 40–200 kΩ resistor sets a 300 ms delay; and connecting CT to GND via a ≥100 pF capacitor enables user-programmable delays from 1.25 ms to 10 s. An internal 220 nA current source charges the capacitor to 1.23 V to determine timeout. TPS3808G01DRVT's CT pin requires low-leakage ceramic capacitors and minimal stray capacitance to maintain timing accuracy across temperature.

Does the TPS3808G01DRVT require an external pullup resistor on the RESET pin?

Yes, the TPS3808G01DRVT requires an external pullup resistor on the RESET pin because it features an open-drain output. A resistor between 10 kΩ and 1 MΩ must be connected from RESET to the desired logic-high voltage rail - which may be higher than VDD (up to 6.5 V) to interface with processors having different I/O voltage levels. Without this pullup, the RESET signal cannot achieve a valid high state. TPS3808G01DRVT's open-drain architecture enables wired-OR reset busing and level translation, but depends entirely on the external resistor for proper logic-level definition.

What is the function of the MR pin on the TPS3808G01DRVT and how is it biased?

The MR (Manual Reset) pin on the TPS3808G01DRVT is a logic-low active input that forces RESET assertion regardless of SENSE voltage. It is internally biased with a 90 kΩ pullup resistor to VDD, so the pin can be left floating if manual reset functionality is not required - eliminating the need for an external pullup. Driving MR below 0.3×VDD asserts RESET, and deassertion occurs only after MR returns high, SENSE exceeds VIT + VHYS, and the full CT-programmed delay expires. TPS3808G01DRVT's MR pin supports system-level reset coordination, such as initiating recovery after watchdog timeout or user button press.

What package type and dimensions does the TPS3808G01DRVT use?

The TPS3808G01DRVT uses the SOT-23-6 (DBV) package with nominal body dimensions of 2.90 mm × 1.60 mm and a maximum height of 1.30 mm. This surface-mount package features gull-wing leads, RoHS-compliant NIPDAU lead finish, and is rated for moisture sensitivity level 1 (260°C peak reflow). The pinout is standardized: Pin 1 = RESET, Pin 2 = GND, Pin 3 = MR, Pin 4 = CT, Pin 5 = SENSE, Pin 6 = VDD. TPS3808G01DRVT's compact SOT-23 footprint enables high-density PCB layouts while maintaining manufacturability in standard reflow processes.