Texas Instruments TPS3808G01DBVTG4

Overview

TPS3808G01DBVTG4 from Texas Instruments is a low-quiescent-current, adjustable-threshold supervisory circuit designed to monitor system supply voltages down to 0.405 V and assert 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. It is used in battery-powered microcontroller systems requiring precise power-on reset timing and rail monitoring.

For engineers reviewing the TPS3808G01DBVTG4 datasheet, TPS3808G01DBVTG4 pinout, TPS3808G01DBVTG4 application, or TPS3808G01DBVTG4 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 power sequencing and brownout detection.

Technical Context

The TPS3808G01DBVTG4 implements a precision voltage comparator with built-in hysteresis (1.5–3% of VIT) and an on-chip 220 nA current source that charges an external CT capacitor to generate programmable reset delay. Its SENSE input accepts any monitored rail ≥0.405 V via external resistor divider, while MR provides asynchronous reset initiation with logic-level compatibility (VIL ≤ 0.3 VDD, VIH ≥ 0.7 VDD).

RESET deassertion occurs only after both SENSE > VIT + VHYS and MR = high, followed by the full programmed delay period. The device operates across 1.7–6.5 V supply range, supports open-drain output up to 6.5 V with external pullup (10 kΩ–1 MΩ), and maintains stable performance over industrial and automotive temperature extremes (−40°C to 125°C).

Key Specifications

Pinout & Package

SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, surface-mount, lead-free, RoHS-compliant. Thermal performance optimized with standard PCB copper pour on GND pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3808G01DBVTG4, TPS3808G01DBVR offers identical functionality in volume-friendly packaging, while MAX6326UT29D3+ trades programmability and dual-input capability for ultra-low I_DD and reduced pin count - making it viable only for static, single-rail designs.

Availability

TPS3808G01DBVTG4 is available at Aetrix Electronics and suitable for microcontroller power sequencing, battery-powered IoT sensor nodes, FPGA configuration integrity, and automotive body control modules requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TPS3808G01DBVTG4 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, embedded processing, and power management ICs, with leadership in high-reliability industrial and automotive solutions.

The TPS3808 family is engineered for precision power-supply monitoring in resource-constrained embedded systems, emphasizing ultra-low quiescent current, wide input voltage range, and field-programmable reset timing - targeting battery longevity and robustness in harsh environments.

FAQ

What is the minimum detectable supply voltage for TPS3808G01DBVTG4?

The TPS3808G01DBVTG4 has a factory-set threshold of 0.405 V on the SENSE pin, enabling direct monitoring of ultra-low-voltage rails such as 0.5 V or 0.6 V processor cores. When used with an external resistor divider, it can accurately supervise any rail ≥0.405 V without additional active components - a capability confirmed in TI's SBVS050M datasheet Section 5 and Figure 8-1.

How is the reset delay time configured on TPS3808G01DBVTG4?

The reset delay on TPS3808G01DBVTG4 is set via the CT pin: leaving CT open yields 20 ms, connecting CT to VDD through a 40–200 kΩ resistor gives 300 ms, and connecting CT to GND via a ≥100 pF capacitor enables user-programmable delays from 1.25 ms to 10 s. This behavior is defined in Section 8.3.2 of the official datasheet and verified by TI's timing diagram (Figure 7-1).

Does TPS3808G01DBVTG4 support operation at 125°C junction temperature?

Yes, TPS3808G01DBVTG4 is fully specified over −40°C to 125°C junction temperature, with all electrical characteristics (including 0.5% VIT accuracy and 2.4 μA I_DD) guaranteed across this range. Thermal metrics (RθJA = 180.9°C/W for DBV package) and qualification data confirm suitability for under-hood automotive and industrial applications - per Section 7.3 and 7.5 of SBVS050M.

What is the function of the MR pin on TPS3808G01DBVTG4?

The MR (Manual Reset) pin on TPS3808G01DBVTG4 is an active-low input that forces RESET assertion regardless of SENSE voltage. Internally pulled up to VDD with a 90 kΩ resistor, it accepts logic-level signals (VIL ≤ 0.3 VDD, VIH ≥ 0.7 VDD) and is commonly used for watchdog-triggered resets or system-initiated reboots - detailed in Section 6 (Pin Functions) and Section 8.3.3 of the TI datasheet.

Can TPS3808G01DBVTG4 drive a RESET line referenced to a voltage higher than VDD?

Yes, the open-drain RESET output of TPS3808G01DBVTG4 supports voltage translation up to 6.5 V when paired with an external pullup resistor (10 kΩ–1 MΩ). This allows interfacing with MCUs or FPGAs whose RESET inputs operate at higher voltages (e.g., 5 V) than the TPS3808G01DBVTG4's VDD rail - a feature explicitly documented in Table 6-1 and Section 8.3.4 of SBVS050M.