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STMicroelectronics SPSB081C3-TR
- Part No.:
- SPSB081C3-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Power Management - Specialized
- Package:
- 32-TFQFN Exposed Pad
- Datasheet:
-
SPSB081C3-TR.pdf
- Description:
- LINEAR IC'S
- Quantity:
- Payment:
- Shipping:
Inventory:3,520
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Product details
Overview
SPSB081C3-TR from STMicroelectronics is an AEC-Q100 qualified automotive power management IC integrating dual LDO regulators (V1 = 3.3 V, V2 = 3.3 V tracker), four 0.14 A high-side drivers (RON = 7 Ω), CAN-FD transceiver (ISO 11898-2/2016, SAE J2284), contact monitoring (WU1/WU2), and programmable watchdog/reset. It supplies microcontrollers and peripherals in body control modules while enabling fail-safe diagnostics and ultra-low standby current (15 µA).
For engineers reviewing the SPSB081C3-TR datasheet, SPSB081C3-TR pinout, SPSB081C3-TR application, or SPSB081C3-TR equivalent, this device supports critical automotive functions including system wake-up via cyclic sensing, open-load diagnosis on all HS outputs, V1 overvoltage protection, thermal warning/shutdown (TW = 140–160 °C, TSD1 = 165–185 °C), and SPI-controlled configuration of regulator rails and safety features.
Technical Context
The SPSB081C3-TR implements a dual-regulator architecture where V1 delivers fixed 3.3 V @ 250 mA for MCU supply, and V2 operates as a ±20 mV tracking regulator of V1 at identical 3.3 V output, configurable via SPI bit V2_TKR. Both regulators require no electrolytic capacitors and support ceramic loads ≥1 µF.
Its CAN-FD physical layer complies with ISO 11898-2/2016 and SAE J2284, includes local/bus failure diagnosis, and draws power from V1, V2, or external VCANSUP. Four independent HS drivers feature internal 10-bit PWM timers, current monitoring (CM pin), open-load detection, and short-circuit protection with thermal cluster management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| V1 Output Voltage | 3.3 V fixed (OTP-configured); powers MCU and integrated CAN-FD transceiver |
| V2 Output Mode | Tracker of V1 (±20 mV tolerance); enables synchronized peripheral supply without separate reference |
| HS Driver Current | 0.14 A continuous per channel; supports LED modules and high-capacitance sensors |
| Standby Quiescent Current | 15 µA typical; enables battery-sensitive applications like passive keyless entry |
| CAN-FD Compliance | ISO 11898-2/2016 + SAE J2284; includes bus failure and local fault diagnosis |
| Thermal Protection | Warning threshold TW = 140–160 °C; shutdown TSD1 = 165–185 °C with 5 °C hysteresis |
| Wake-up Inputs | WU1 and DIR/WU2 support static or programmable cyclic sensing for door/tailgate modules |
Pinout & Package
SPSB081C3-TR uses QFN32L Epad (5.0 × 5.0 × 1.0 mm) with exposed thermal pad; pin 32 (TAB) must be connected to PGND for thermal and electrical integrity.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| WU1 | Wake-up input 1 | Static or cyclic monitoring of external contacts (e.g., door latch status) |
| DIR/WU2 | Dual-function pin | Configurable as direct HS drive enable or second wake-up input with DIR capability |
| V2 | Tracker regulator output | 3.3 V output tracking V1; protected against reverse bias and short-circuit |
| OUT1–OUT4 | High-side driver outputs | Each drives 0.14 A loads with RON = 7 Ω, open-load diagnosis, and current monitor multiplexing |
| VS | Power stage supply | External supply for HS drivers; requires reverse-battery protection and local ceramic decoupling |
| VSREG | Main regulator input | Feeds V1/V2, CAN/LIN analog blocks, and wake-up circuitry; needs ceramic + electrolytic backup |
| CAN_H / CAN_L | CAN-FD differential bus interface | Compliant I/O with ±40 V fault tolerance and integrated bus failure detection |
| DIAGN | Failsafe error indicator | Active-low open-drain output signaling thermal, overcurrent, or regulator faults |
| CM | Current monitor output | Multiplexed analog output reflecting real-time current of selected HS driver (fixed scaling) |
| NINT | Interrupt notification | Push-pull output indicating errors, warnings, or local/remote wake-up events |
Key Features
| Feature | Design Value |
|---|---|
| Dual LDO architecture with tracker mode | V2 dynamically tracks V1 at ±20 mV, eliminating need for separate reference and reducing BOM count |
| Integrated CAN-FD PHY with diagnostics | Full ISO 11898-2/2016 compliance plus local/bus failure reporting via SPI registers |
| Four independent HS drivers with PWM | Each includes dedicated 10-bit timer, enabling precise dimming or timing-critical actuation without MCU overhead |
| Programmable cyclic wake-up sensing | WU1/WU2 support configurable polling intervals for contact monitoring-critical for ASIL-B–level door/tailgate systems |
| Fail-safe signalization chain | DIAGN + NINT + CM + register-based flags provide layered fault visibility for ISO 26262 diagnostic coverage |
Applications
| Body Control Module (BCM) | Telematic Control Unit (TCU) |
|---|---|
|
Use Scenario: Centralized power and communication hub managing lighting, locks, windows, and sensors across vehicle domains. IC Role / Device Role / Timing Role: Primary power manager supplying MCU (via V1), CAN-FD gateway (via V1/V2), and HS drivers for LED indicators and motor controls. Use Value: Reduces external component count by integrating regulated supplies, CAN-FD PHY, and four HS drivers with diagnostics-enabling compact, ASIL-B–compliant BCM designs. |
Use Scenario: Cellular-connected module handling OTA updates, GNSS, and vehicle-to-cloud telemetry with robust low-power operation. IC Role / Device Role / Timing Role: Provides always-on 3.3 V supply (V1), tracked peripheral rail (V2), and wake-up capability for LTE modem sleep/wake cycles. Use Value: 15 µA standby current and programmable periodic wake-up allow TCU to maintain network registration while minimizing battery drain during parking. |
| Passive Keyless Entry (PKE) | Seat Control Module |
|
Use Scenario: Low-power RF receiver subsystem detecting proximity fobs and initiating secure authentication sequences. IC Role / Device Role / Timing Role: Supplies secure MCU core (V1), RF front-end bias (V2), and monitors door handle contacts (WU1/WU2) with cyclic sensing. Use Value: Cyclic wake-up and <15 µA quiescent current extend battery life in fob-detection circuits while meeting OEM ultra-low leakage requirements. |
Use Scenario: Actuating seat position motors, heating elements, and memory switches with real-time fault feedback. IC Role / Device Role / Timing Role: Drives seat motors via OUT1–OUT4 with current monitoring (CM), open-load detection, and thermal shutdown to prevent overheating. Use Value: Integrated current sensing and per-channel diagnostics eliminate need for external sense resistors and comparators-reducing PCB area and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SPSB0815-TR | V1 = 5 V (not 3.3 V); supports LIN transceiver (SPSB081C3 does not) | Suitable for legacy 5 V MCU platforms requiring LIN bus; lacks 3.3 V optimization for modern low-voltage SoCs | Select when system MCU requires 5 V supply and LIN communication is mandatory |
| TLE9261-2QX | Single 5 V LDO (no V2 tracker); 4-channel HS drivers with 0.5 A rating; no integrated CAN-FD | Requires external CAN-FD transceiver and separate 3.3 V regulator; higher drive strength but less integration | Select when higher current HS drive (0.5 A) is needed and CAN-FD can be added externally |
Compared with SPSB0815-TR, the SPSB081C3-TR offers optimized 3.3 V supply for modern MCUs and eliminates LIN overhead, while versus TLE9261-2QX it provides tighter system integration (CAN-FD + tracker LDO) at lower per-channel drive current-favoring compact, cost-sensitive body electronics.
Availability
SPSB081C3-TR is available at Aetrix Electronics and suitable for body control modules, telematic control units, and passive keyless entry systems requiring stable component supply, AEC-Q100 qualification, and long-term automotive lifecycle support.
Supply support for SPSB081C3-TR 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
STMicroelectronics is a global semiconductor leader specializing in automotive, industrial, and power management solutions, with deep expertise in functional safety and ASIL-compliant design.
The SPSB081 product line targets automotive body electronics requiring integrated power regulation, communication interfaces, and intelligent load driving-designed to reduce system complexity and accelerate ASIL-B–level module development.
FAQ
Does SPSB081C3-TR support LIN communication?
No. The SPSB081C3-TR integrates only CAN-FD (ISO 11898-2/2016, SAE J2284) and omits the LIN transceiver present in SPSB0815-TR and SPSB0813-TR. Its pinout excludes LIN-specific pins (RxD_L, TxD_L), and documentation confirms LIN functionality is limited to those variants. System-level LIN connectivity requires an external transceiver.
What is the maximum continuous current per high-side driver?
Each of the four high-side drivers (OUT1–OUT4) supports 0.14 A continuous current with RON = 7 Ω. Absolute maximum ratings specify up to 1.25 A peak per output, but sustained operation above 0.14 A risks thermal violation under typical PCB conditions. Derating is required above ambient temperatures of 85 °C per thermal data in DS14048 Rev 3.
How is V2 configured as a tracker of V1?
V2 is configured as a tracker by setting the V2_TKR bit (bit 6 of Control Register CR2) to '1' via SPI. This mode is only valid when V1 and V2 are set to the same nominal voltage (3.3 V for SPSB081C3-TR). In tracker mode, V2 output follows V1 within ±20 mV and retains full short-circuit and thermal protection.
Is external reverse-battery protection required for VS and VSREG inputs?
Yes. Both VS (power stage supply) and VSREG (regulator input) require external reverse-battery protection-typically implemented using a P-channel MOSFET or diode-as explicitly stated in the datasheet. Failure to include this protection risks damage during jump-start or load-dump transients exceeding absolute maximum ratings (−0.3 V to 40 V).
SPSB081C3-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 32-TFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Current - Supply:
- 10mA
- Voltage - Supply:
- 40V
- Operating Temperature:
- -40°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 32-VFQFPN (5x5)
SPSB081C3-TR FAQ
1.How can I place an order for SPSB081C3-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SPSB081C3-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SPSB081C3-TR reliable?
The price and inventory of SPSB081C3-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SPSB081C3-TR is usually 5 days.
3.What payment methods are accepted for SPSB081C3-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SPSB081C3-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SPSB081C3-TR?
SPSB081C3-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SPSB081C3-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SPSB081C3-TR?
For technical support, including SPSB081C3-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SPSB081C3-TR requirements.
6.How does Aetrix verify that SPSB081C3-TR is sourced from the original manufacturer or authorized distributors?
All SPSB081C3-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SPSB081C3-TR meets industry standards.
7.What is the process for return or replacement of SPSB081C3-TR?
All SPSB081C3-TR units undergo pre-shipment inspection (PSI). If there is an issue with SPSB081C3-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SPSB081C3-TR part is unused and in its original packaging.
Return procedure for SPSB081C3-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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