TPS3808G50QDBVRQ1 - 5V Auto-Q1 Voltage Supervisor SOT-23-6 | Texas Instruments
MPN: TPS3808G50QDBVRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.45 | $14.50 |
| 100 | $1.21 | $121.00 |
| 500 | $1.02 | $510.00 |
| 1,000 | $0.89 | $890.00 |
TPS3808G50QDBVRQ1 Overview
A voltage supervisor (or reset IC) is a power-management device that observes a supply rail and forces a microcontroller or processor into a known-good boot state whenever the rail falls out of regulation. Supervisors sit beneath the broader power-management IC (PMIC) hierarchy, alongside LDOs, DC-DC converters, and battery chargers, and they serve as the last line of defense against corrupted firmware execution caused by brown-outs, in-rush transients, or load steps. Unlike discrete RC reset circuits, supervisors deliver precise threshold accuracy and predictable timing independent of capacitor leakage.
Key features of the TPS3808G50QDBVRQ1 include a high threshold accuracy of 1.0% (typical), an adjustable reset timeout set by an external CT capacitor, an active-low open-drain RESET output that can be wire-ORed with other rails, and a dedicated manual reset pin for push-button or host-driven assertion. The SOT-23-6 footprint occupies only 2.9 mm × 1.6 mm of board area, making it suitable for space-constrained modules. The Q1 suffix denotes TI's automotive grade, qualifying the device for AEC-Q100 stress testing.
Internally, the device combines a precision bandgap reference, a comparator, a delay timer, and an open-drain output stage. The SENSE input is compared against the internal 5.0 V threshold; when the voltage falls below threshold, the output asserts low and the programmable delay (set by CT) is initiated once SENSE recovers above threshold. This architecture decouples the monitor trip point from the delay timing, allowing the system designer to choose the wake-up behavior independently from the brown-out trip point.
Typical applications include automotive ECU power supervision, ADAS sensor modules, body and chassis controllers, infotainment head-unit rail monitoring, and any industrial system requiring a compact, AEC-Q100 qualified supervisor for a 5 V logic rail. The 1.7 V to 6.5 V input range also covers 3.3 V rails when the G50 variant's nominal 5.0 V threshold is intentionally chosen for early-warning supervision.
When designing with this part, place the CT capacitor close to the CT pin to avoid leakage paths that would alter the delay time, and use a pull-up resistor on RESET sized for the load capacitance. Verify that the SENSE pin is bypassed at high dV/dt loads to prevent false tripping. This page combines distributor pricing, drop-in pin-compatible alternatives, and practical design notes not aggregated on the manufacturer product page.
Drop-in alternatives for TPS3808G50QDBVRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS3808G50QDBVRQ1 (same form factor and footprint) — differing in Automotive Qualification, Function, Input Voltage Range (VDD), Package, Reset Timeout.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS3808G50DBVR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS3808G33QDBVRQ1
✅ Drop-In✓ In Stock
$0.82 / Unit
View Datasheet →TPS3808G25QDBVRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS3808G18QDBVRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS3808G12QDBVRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS3808G50QDBVRQ1 Specifications
| Function | Voltage Supervisor (Microprocessor Reset IC) |
| Number of Voltages Monitored | 1 |
| Monitored Voltage (nominal) | 5.0 V |
| Reset Output Type | Active-Low, Open-Drain |
| Input Voltage Range (VDD) | 1.7 V to 6.5 V |
| Quiescent Current (typical) | 2.4 mA |
| Threshold Accuracy | 1.0% (typical) |
| Reset Timeout | Adjustable via external CT capacitor |
| Manual Reset (MR) Input | Yes, active-low |
| Operating Temperature Range | -40 °C to +125 °C |
| Package | SOT-23-6 (DBV) 2.9 mm × 1.6 mm |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 (Grade 1, Q1 suffix) |
| MSL Level | 1 (per TI packaging profile) |
| RoHS Status | Compliant |
TPS3808G50QDBVRQ1 Pin Configuration
| Pin 1 | GND — Ground reference for the device |
| Pin 2 | RESET — Active-low open-drain reset output (asserted low on fault) |
| Pin 3 | MR — Manual reset input, active-low logic input |
| Pin 4 | CT — External capacitor pin for programmable reset delay |
| Pin 5 | VDD — Supply voltage input, 1.7 V to 6.5 V |
| Pin 6 | SENSE — Voltage sense input, monitored against 5.0 V internal threshold |
Typical Applications
TPS3808G50QDBVRQ1 is suitable for 6 applications: Automotive ECU Power Supervision, ADAS Sensor Module Reset, Infotainment Head-Unit Rail Monitor, Industrial PLC 5 V Logic Supervisor, IoT Edge Sensor Node Brown-Out Protection, Server/Storage 5 V Rail Monitor.
Automotive ECU Power Supervision
The TPS3808G50QDBVRQ1 supervises the 5 V logic rail feeding automotive engine and body ECUs, holding the microcontroller in reset until the rail is stable above 4.95 V. According to TI automotive design guidelines, the 2.4 mA typical quiescent current keeps always-on body-controller quiescent drain within module budgets. The AEC-Q100 Grade 1 qualification from -40 °C to +125 °C covers under-hood thermal exposure; the adjustable CT delay lets the ECU firmware team tune power-good timing to match cold-start crank profiles. Recommend pairing with TPS3808G33QDBVRQ1 for 3.3 V core rail supervision.
Recommended
ADAS Sensor Module Reset
In ADAS camera and radar modules, the TPS3808G50QDBVRQ1 asserts RESET to the vision SoC if the 5 V sensor supply droops during high-current LED flash or radar chirp events. The 1.0% threshold accuracy prevents false resets at the 5 V rail while the open-drain output can be wire-ORed with the SoC's other reset sources. The 1.7 V to 6.5 V VDD range also tolerates transients on automotive battery feeds after load-dump clamps. Compact SOT-23-6 footprint fits inside camera housings with strict 4-layer board area budgets.
Recommended
Infotainment Head-Unit Rail Monitor
The TPS3808G50QDBVRQ1 monitors the 5 V rail feeding infotainment head-unit microprocessors and DSPs, asserting active-low RESET during cold-crank events when the 12 V battery bus dips below regulator dropout. The 1.0% threshold accuracy prevents audio glitches by ensuring clean re-boot sequencing after brown-out. AEC-Q100 qualification supports integration into dashboard modules meeting OEM automotive reliability programs. CT-programmable delay (typically 200 ms for head-unit boot) coordinates with DDR memory initialization timing.
Recommended
Industrial PLC 5 V Logic Supervisor
Industrial PLC digital-input modules and 24 V-to-5 V regulator outputs benefit from the TPS3808G50QDBVRQ1's 1.7-6.5 V VDD operating range, which accepts the lower tap of wide-input DC-DC converters used in factory-automation backplanes. The Q1 automotive-grade temperature rating extends headroom into industrial outdoor enclosures subject to wide thermal swings. Open-drain RESET supports parallel pull-ups to backplane logic levels without level translation. Useful for IEC 61131-2 compliant PLC designs.
Recommended
IoT Edge Sensor Node Brown-Out Protection
Battery-powered IoT edge nodes that step down from a Li-ion cell to 5 V via boost converters can use the TPS3808G50QDBVRQ1 to assert RESET when the boost output droops below 4.95 V under heavy transmit load. The 2.4 mA Iq is a known design trade-off against 0.5 µA-class supervisors, so this part suits always-on mains-powered gateways rather than coin-cell endpoints. The MR pin enables host-driven reset from a push-button or wireless command path. Compatible with SOT-23-6 reflow profiles common in IoT modules.
Recommended
Server/Storage 5 V Rail Monitor
Hot-swap controllers and storage controllers in server backplanes use the TPS3808G50QDBVRQ1 to detect 5 V regulator health and hold the management controller in reset during hot-insertion inrush. The 1.0% threshold accuracy and active-low open-drain output integrate cleanly with BMC and CPLD supervisor trees. The SOT-23-6 footprint suits dense 1U/2U server board layouts where supervisor ICs are placed near each DC-DC output. CT delay can be tuned to wait for downstream bulk capacitor charging.
Recommended
Recommended Products Summary
Engineering reference data for TPS3808G50QDBVRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS3808G50DBVR | TPS3808G33QDBVRQ1 | TPS3808G25QDBVRQ1 | TPS3808G18QDBVRQ1 | TPS3808G12QDBVRQ1 |
|---|---|---|---|---|---|---|
| Package | SOT-23-6 (DBV) | SOT-23-6 (DBV) - same | SOT-23-6 (DBV) - same | SOT-23-6 (DBV) - same | SOT-23-6 (DBV) - same | SOT-23-6 (DBV) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Sense Threshold | 5.0 V | 5.0 V | 3.3 V | 2.5 V | 1.8 V | 1.2 V |
| AEC-Q100 Qualified | Yes (Grade 1, Q1) | No | Yes (Grade 1) | Yes (Grade 1) | Yes (Grade 1) | Yes (Grade 1) |
| Quiescent Current (typ) | 2.4 mA | 2.4 mA | 2.4 mA | 2.4 mA | 2.4 mA | 2.4 mA |
| VDD Operating Range | 1.7 V to 6.5 V | 1.7 V to 6.5 V | 1.7 V to 6.5 V | 1.7 V to 6.5 V | 1.7 V to 6.5 V | 1.7 V to 6.5 V |
| Reset Output Type | Active-Low Open-Drain | Active-Low Open-Drain | Active-Low Open-Drain | Active-Low Open-Drain | Active-Low Open-Drain | Active-Low Open-Drain |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C | -40 °C to +125 °C |
| Reset Delay | Adjustable via CT | Adjustable via CT | Adjustable via CT | Adjustable via CT | Adjustable via CT | Adjustable via CT |
Key Differentiators
- AEC-Q100 Grade 1 automotive qualification on the G50 threshold (vs TPS3808G50DBVR)
- Family-wide threshold scalability from 1.2 V to 5.0 V in identical footprint (vs TPS3808G33QDBVRQ1 / TPS3808G18QDBVRQ1 / TPS3808G12QDBVRQ1)
- Manual reset (MR) pin plus open-drain RESET output (vs Simple reset-only supervisors (e.g., MAX811))
Design Notes
Bypass VDD (pin 5) with a 0.1 µF X7R ceramic placed within 3 mm of the IC. The SENSE pin (pin 6) draws a few microamperes and can be tied directly to VDD for single-supply monitoring, or to a divided-down rail for voltage scaling. For noisy 12 V-derived 5 V rails, add a small RC filter (10 kΩ / 100 nF) on SENSE to prevent false resets during load transients - per TI's TPS3808-Q1 datasheet, fast dV/dt on SENSE can otherwise trigger spurious assertions.
Choose the CT capacitor with low leakage (X7R or NP0, not Y5V) to keep the reset delay within ±10%. Do not leave CT floating: a missing capacitor will produce an undefined delay and may cause RESET to chatter at the threshold edge. The MR pin (pin 3) is internally pulled up, but adding an external pull-up to VDD is recommended if the pin is connected to a long PCB trace or a push-button - this prevents EMI-induced resets.
Place the CT capacitor within 2 mm of pin 4 to minimize leakage paths on the PCB. Route the RESET trace away from switching-node PCB areas (DC-DC inductors, MOSFET switches) to avoid capacitive coupling into the open-drain output. Use a star-ground pattern tying GND (pin 1) directly to the system ground plane with a short via. For AEC-Q100 PCB conformance, follow IPC-9592 power-supply conversion and IPC-A-610 acceptance criteria on solder joints.
Compliance Information
AEC-Q100 Grade 1 qualified per TI -Q1 designation. RoHS and REACH compliant per TI product page declarations. Lead-free NiPdAu lead plating, lead-free reflow up to 260 °C peak per JEDEC J-STD-020.
