TPS386000RGPR Quad Voltage Supervisor: Selection and Sourcing Guide (2025)

Bottom Line: When selecting a multi-rail voltage supervisor for industrial or high-reliability designs, the TPS386000RGPR from Texas Instruments stands out for its ability to monitor four independent power rails (down to 0.4 V each) with individually programmable reset delays, a configurable watchdog timer, and a compact 16-pin VQFN package. For most engineers choosing between the TPS386000RGPR, TPS386040RGPR, TPS3700, and TPS3823 families, the deciding factors are the number of rails monitored (1 vs. 2 vs. 4), the required threshold flexibility (fixed vs. resistor-programmable), and whether automotive AEC-Q100 qualification matters. If you need quad-rail supervision with watchdog in a single IC, the TPS386000RGPR is the clear first choice; for simpler single-rail or dual-rail applications, the TPS3823 or TPS3700 respectively offer lower cost and smaller packages.

What Is the TPS386000RGPR?

The TPS386000RGPR is a quad supply voltage supervisor (SVS) from Texas Instruments, housed in a 16-pin VQFN (RGP) package. It monitors up to four power-supply rails simultaneously, asserting a single open-drain reset output (RESET_N) when any monitored rail falls below its programmed threshold. Key distinguishing features include:

• Four independent monitoring inputs (MON1–MON4): each input accepts voltages from 0.4 V to 6.5 V, enabling supervision of 3.3 V, 1.8 V, 1.2 V, and 0.9 V rails on a modern SoC power tree.
• Programmable thresholds via external resistor dividers: threshold accuracy is ±1.5% (typical) over the full operating temperature range of −40 °C to +125 °C.
• Adjustable reset delay: a capacitor on the CT pin programs the power-on reset delay from 1 ms to more than 10 s.
• Watchdog timer: a separate capacitor on the WD pin programs the watchdog timeout window from approximately 1 ms to several seconds.
• Supply voltage: VCC operates from 1.62 V to 6.5 V, drawing a quiescent current of typically 14 µA.

The TPS386000RGPR is the commercial-temperature version; the TPS386000QRGPRQ1 is the AEC-Q100 Grade 1 automotive variant.

Key Selection Parameters

Number of Monitored Rails

The most fundamental parameter is how many supply rails your design needs to supervise. The TPS3823 family monitors a single rail (VDD); it uses a fixed factory-set threshold (2.25 V, 3.0 V, 3.3 V, or 5.0 V) and is appropriate for simple 1-rail systems. The TPS3700 monitors two rails with a window comparator architecture, detecting both overvoltage and undervoltage on each input. The TPS386000RGPR covers four rails, making it the right choice for complex SoC boards where DDR memory, core logic, I/O, and analog supplies all need supervision.

Rule of thumb: Count the rails whose dropout would cause a hard system hang; if that number is ≥ 3, evaluate the TPS386000RGPR before adding multiple single-channel supervisors.

Threshold Flexibility: Fixed vs. Programmable

Fixed-threshold supervisors (TPS3823-25, TPS3823-33, TPS3823-50) cost less and require no external resistors, but they lock you into standard voltage levels. Resistor-programmable parts (TPS3700, TPS386000RGPR) let you set precise thresholds for non-standard rails such as 1.05 V core supplies or 2.5 V DDR termination. The TPS386000RGPR sets each rail's threshold with a resistor divider from the monitored node to the MON pin, calculated as:

V_threshold = V_ref × (1 + R_top / R_bottom), where V_ref = 0.4 V

For a 1.8 V rail with a 5% undervoltage trip point (1.71 V), standard 1% resistors give accurate results with R_top ≈ 3.28 × R_bottom.

Reset Delay Programmability

The reset pulse width and power-on delay directly affect system bring-up reliability. The TPS3823 provides a fixed 200 ms reset assertion period — adequate for most processors but not configurable. The TPS386000RGPR uses an external capacitor (C_T) where:

t_delay (ms) ≈ 370 × C_T (µF)

This allows engineers to tune the delay from 1 ms (for fast FPGA configurations) to 10+ seconds (for slow-boot Linux SoCs), without changing the IC.

Watchdog Timer

A watchdog timer is critical in any fielded embedded system. The TPS3823 includes a 1.6 s fixed watchdog period (when enabled via the WDI pin). The TPS386000RGPR programs the watchdog timeout with a capacitor on the WD pin, using the same 370 ms/µF scaling factor as the reset delay. When the watchdog fires, it forces a full reset cycle — including the programmed power-on delay — preventing half-initialized states.

If your firmware can tolerate only a fixed 1.6 s watchdog window, the TPS3823 is simpler. For systems with variable task cycle times (e.g., a BLE SoC that can sleep for 5 s), the TPS386000RGPR's programmable watchdog is essential.

Package and Footprint

The TPS3823 is available in SOT-23-5 (DBV) and SOT-23-6 packages — tiny and hand-solderable. The TPS386000RGPR uses a 4 mm × 4 mm 16-pin VQFN with a thermal pad, requiring a clean PCB layout and reflow or hot-air rework. The TPS3700 uses a 6-pin SOT-23 (DDC) or 8-pin WSON (DSE) package.

If board space is constrained and you only need 1-2 rails, the smaller packages reduce layout effort. For 4-rail supervision, the TPS386000RGPR's VQFN footprint is a fair trade-off versus mounting four separate TPS3823 devices.

Automotive and Safety Qualification

For automotive electronic control units (ECUs) or industrial safety-critical systems, AEC-Q100 qualification is mandatory. The TPS386000QRGPRQ1 (Grade 1, −40 °C to +125 °C) is the qualified automotive twin of the TPS386000RGPR. The TPS3823-25QDBVRQ1 and TPS3700QDDCRQ1 are similarly qualified single-channel and dual-channel automotive variants. Commercial-grade parts should not be used in automotive production without proper derating studies and qualification data review.

Quiescent Current

In battery-powered or always-on IoT applications, supervisor quiescent current directly impacts standby power. The TPS386000RGPR draws 14 µA typical (up to 22 µA max), while the TPS3823 draws approximately 25 µA typical. For single-cell Li-ion applications where every µA matters, evaluate the TPS3823 or TPS3700 for single/dual-rail needs, as fewer inputs mean lower quiescent draw.

Recommended Products Comparison Table

Product	Rails Monitored	Threshold Type	Watchdog	Package	Best For
TPS386000RGPR	4	Resistor-programmable	Programmable (C_T)	16-pin VQFN	Multi-rail SoC supervision
TPS386040RGPR	4	Resistor-programmable	Programmable (C_T)	16-pin VQFN	Quad supervision, alternate variant
TPS3700DDCR	2 (window)	Resistor-programmable	None	SOT-23-6	Dual-rail OV/UV detection
TPS3823-33DBVT	1	Fixed 3.3 V	Fixed 1.6 s	SOT-23-5	Simple 3.3 V system reset
TPS3823-25DBVR	1	Fixed 2.25 V	Fixed 1.6 s	SOT-23-5	2.5 V or 1.8 V (via tolerance) reset

All five parts are available through FindMyChip's network of 200+ verified distributors. Use the /search page to check live inventory and pricing, or submit a quote request for bulk quantities.

Selection Decision Flowchart

Use the following decision logic to narrow down the right part:

1. How many power rails need supervision?

   • 1 rail → Go to step 2
   • 2 rails → TPS3700DDCR or TPS3700DDCT (window detection, both OV and UV)
   • 3-4 rails → TPS386000RGPR (commercial) or TPS386000QRGPRQ1 (automotive)

2. (1 rail) Is automotive AEC-Q100 required?

   • Yes → TPS3823-25QDBVRQ1, TPS3823-30QDBVRQ1, or TPS3823-33QDBVRQ1 depending on voltage level
   • No → Go to step 3

3. (1 rail, commercial) Which threshold voltage?

   • 2.25 V → TPS3823-25DBVR / TPS3823-25DBVT
   • 3.0 V → TPS3823-30DBVR / TPS3823-30DBVT
   • 3.3 V → TPS3823-33DBVT
   • 5.0 V → TPS3823-50DBVR / TPS3823-50DBVT
   • Non-standard → Use TPS3700DDCR with resistor dividers for programmable threshold

4. (Multi-rail) Is automotive AEC-Q100 required?

   • Yes → TPS386000QRGPRQ1 (quad, Grade 1 automotive)
   • No → TPS386000RGPR

5. Is programmable watchdog required?

   • Yes (multi-rail) → TPS386000RGPR / TPS386040RGPR
   • Yes (single-rail, fixed 1.6 s OK) → TPS3823 with WDI pin enabled
   • No watchdog needed → Any of the above with WDI tied low or unused

Frequently Asked Questions

What is the difference between TPS386000RGPR and TPS386040RGPR? Both are quad voltage supervisors in the same VQFN-16 package with programmable thresholds and watchdog timers. The TPS386040RGPR is a second-source variant within the TPS3860x0 family with slightly different internal reference trimming and threshold programming curves. For new designs, check TI's product folder for the latest recommended device; both are pin-compatible and available through FindMyChip's /search page.

Can the TPS386000RGPR monitor rails below 1.8 V? Yes. The MON1–MON4 inputs accept voltages as low as 0.4 V, making the TPS386000RGPR suitable for supervising 0.9 V core rails, 1.0 V DDR supplies, and 1.2 V I/O rails common in modern FPGAs and SoCs. The threshold is set by a resistor divider; the internal reference is 0.4 V (±1.5% typical), so accurate low-voltage supervision is achievable with standard 0.1% resistors.

Is the TPS386000RGPR pin-compatible with any single-channel supervisor? No. The TPS386000RGPR uses a 16-pin VQFN footprint and provides four monitoring channels, a CT pin, and a WD pin that have no equivalents on single-channel parts like the TPS3823 (SOT-23-5). Plan your PCB footprint for the 4 mm × 4 mm VQFN with a center thermal pad at the design stage; do not assume footprint migration from smaller packages.

What happens when one of the four monitored rails drops below threshold? The TPS386000RGPR asserts RESET_N (open-drain, active low) immediately when any monitored input (MON1–MON4) falls below its programmed threshold. The reset remains asserted for the programmed delay period (set by C_T) after all four rails return above their thresholds. This glitch-filtering behavior prevents false resets from brief supply transients shorter than approximately 1 µs.

How do I source TPS386000RGPR in small quantities vs. production volumes? For prototype quantities (1–50 units), distributors such as Mouser and DigiKey typically stock the TPS386000RGPR. For production volumes (500+ units) or when standard channels show zero inventory, FindMyChip connects you with 200+ verified distributors and broker networks across Shenzhen, Hong Kong, and Singapore — submit a quote request with your target price and lead time for a competitive response within 24 hours.

Conclusion and Next Steps

The TPS386000RGPR is the right choice when you need to supervise three or four power rails in a single IC, with fully programmable thresholds, a configurable reset delay, and a programmable watchdog timer. For simpler 1-rail or 2-rail applications, the TPS3823 and TPS3700 families offer smaller packages and lower quiescent currents at reduced cost.

To find current stock and pricing for the TPS386000RGPR and its alternatives:

• Search for TPS386000RGPR on FindMyChip — check live inventory across 200+ verified distributors
• Request a bulk quote — receive competitive pricing within 24 hours
• Compare the TPS386040RGPR, TPS3700DDCR, and TPS3823-33DBVT product pages for full specifications and distributor options

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