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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

STMicroelectronics SPSB081C5-TR

Name: SPSB081C5-TR
Brand: STMicroelectronics
SKU: SPSB081C5-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SPSB081C5-TR

Manufacturer:: STMicroelectronics

Category:: Power Management - Specialized

Package:: 32-TFQFN Exposed Pad

Datasheet:: SPSB081C5-TR.pdf

Description:: LINEAR IC'S

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Product details

Overview

SPSB081C5-TR from STMicroelectronics is an automotive power management IC integrating dual LDO regulators (V1 = 5 V / 250 mA, V2 = 3.3 V / 100 mA tracker), four 0.14 A high-side drivers with open-load and overcurrent diagnosis, CAN-FD transceiver (ISO 11898-2/2016, SAE J2284), contact wake-up inputs (WU1/WU2), and fail-safe DIAGN output - deployed in body control modules for LED lighting, sensor supply, and gateway-level power sequencing.

For engineers reviewing the SPSB081C5-TR datasheet, SPSB081C5-TR pinout, SPSB081C5-TR application, or SPSB081C5-TR equivalent, this device supports SPI-configurable voltage tracking, thermal warning/shutdown (140 °C / 165–185 °C), ultra-low standby current (15 µA), and ASIL-aware diagnostics including current monitoring, window watchdog, and programmable reset generation.

Technical Context

The SPSB081C5-TR implements a dual-regulator architecture where V1 supplies MCU and internal CAN-FD logic at fixed 5 V, while V2 operates as a ±20 mV tracking regulator of V1 (3.3 V output), configurable via SPI register CR2 bit V2_TKR. Both LDOs require only ceramic capacitors (≥1 µF) and include overvoltage protection, short-to-ground detection, and thermal shutdown with hysteresis.

Its four HS drivers feature integrated R_ON = 7 Ω, 10-bit PWM per channel, current monitor multiplexing (CM pin), and open-load diagnosis. The CAN-FD physical layer supports local/bus failure diagnosis, and wake-up inputs WU1/WU2 support cyclic sensing with DIR functionality on WU2 - all operating across −40 °C to +125 °C ambient with AEC-Q100 Grade 1 qualification.

Key Specifications

Parameter	Value and Actual Design Meaning
V1 Output	Fixed 5 V, 250 mA max - powers MCU and embedded CAN-FD transceiver; includes overvoltage pulldown and short-to-GND detection.
V2 Output	3.3 V tracker of V1 (±20 mV), 100 mA max - supplies external peripherals; configured via SPI CR2.V2_TKR bit.
HS Drivers	4× high-side outputs, R_ON = 7 Ω, 0.14 A continuous - drive LEDs/sensors with integrated PWM timers and open-load diagnosis.
CAN-FD Interface	ISO 11898-2/2016 & SAE J2284 compliant - supports bus failure diagnosis, local fault reporting, and VCANSUP selectable supply source.
Standby Current	15 µA typical in VBAT_standby mode - enables always-on wake-up capability with WU1/WU2 cyclic sensing and timer-based wake.
Thermal Protection	Warning at 140–160 °C (TW), shutdown at 165–185 °C (TSD1), hysteresis ≥5 °C - ensures safe operation under sustained load conditions.
ESD Robustness	HBM ±8 kV on CAN_H/CAN_L/LIN pins; ±4 kV on OUT1–OUT4; ±2 kV on logic pins - meets automotive EMC requirements per ISO 7637-2 Pulse1/2a/3a/3b.

Pinout & Package

SPSB081C5-TR is housed in a QFN32L Epad package (5.0 × 5.0 × 1.0 mm), thermally enhanced with exposed die pad for PCB heat dissipation. Pin layout follows top-view orientation with VSREG, V1, V2, OUT1–OUT4, CAN_H/CAN_L, DIAGN, NINT, CM, and SPI interface signals distributed across perimeter and center pads.

Pin	Circuit Role	Design Meaning
VSREG	Main power input	Supplies internal regulators (V1/V2), CAN-FD, wake-up circuitry; requires ceramic + electrolytic capacitor decoupling.
V1	Primary LDO output	5 V / 250 mA regulated supply for MCU and CAN-FD core; includes overvoltage protection and short-to-GND detection.
V2	Tracker LDO output	3.3 V / 100 mA output tracking V1 ±20 mV; SPI-configurable via CR2.V2_TKR; reverse-bias protected.
OUT1–OUT4	High-side driver outputs	Four independent 0.14 A HS switches with R_ON = 7 Ω, PWM control, current monitoring (via CM), and open-load diagnosis.
CAN_H / CAN_L	CAN-FD differential bus I/O	ISO 11898-2-compliant physical layer with bus failure detection, local fault reporting, and VCANSUP supply flexibility.
DIAGN	Fault signaling output	Active-low open-drain error indicator - asserts on thermal warning, regulator failure, watchdog timeout, or output fault.
NINT	Interrupt output	Push-pull signal indicating errors, warnings, or wake-up events (WU1/WU2/CAN/timer); configurable mask via SPI.
WU1 / DIR/WU2	Wake-up inputs	Static/cyclic contact monitoring inputs; WU2 doubles as direct HS drive enable (DIR mode) for synchronized output control.
CM	Current monitor multiplexer	Analog output sourcing scaled current image of selected HS driver (OUT1–OUT4); enables real-time load monitoring without external shunts.
CLK / DI / DO / CSN	SPI interface	ST-standard 32-bit SPI (ST-SPI) for configuration, status readback, and diagnostic register access; supports daisy-chaining.

Key Features

Feature	Design Value
Dual LDO architecture with tracking	V1 fixed 5 V for MCU/CAN; V2 tracks V1 at 3.3 V ±20 mV - eliminates need for external tracking IC and reduces BOM count.
Integrated CAN-FD PHY	Full ISO 11898-2/2016 compliance with bus/local failure diagnosis - enables robust vehicle network communication without discrete transceiver.
Programmable wake-up system	Cyclic sensing on WU1/WU2 + periodic timer wake - supports low-power always-on functions in BCM/gateway applications.
Fault-resilient HS drivers	Four drivers with R_ON = 7 Ω, open-load detection, overcurrent shutdown, and current monitor output - simplifies LED/sensor interface design.
ASIL-aware diagnostics	Window watchdog, programmable reset generator, thermal warning/shutdown, and latched fault registers - supports functional safety development per ISO 26262.

Applications

Body Control Module (BCM)

Gateway Control Unit

Use Scenario: Centralized power distribution and I/O control for door locks, interior lighting, and window motors in modern vehicles.

IC Role / Device Role / Timing Role: Power management IC providing regulated 5 V/3.3 V rails, driving LED indicators via HS outputs, and enabling CAN-FD communication with domain controllers.

Use Value: Reduces external component count by integrating regulators, drivers, and CAN-FD PHY - lowers PCB area and improves system-level reliability.

Use Scenario: Aggregation and translation of signals between CAN-FD, LIN (not on C5 variant), and microcontroller subsystems in vehicle gateways.

IC Role / Device Role / Timing Role: CAN-FD node with embedded power regulation and wake-up capability - handles message routing while maintaining low-power readiness.

Use Value: Enables seamless integration into multi-bus architectures without requiring separate CAN transceivers or LDOs - accelerates gateway design cycle.

Telematics Control Unit (TCU)

Seat & Sunroof Control Module

Use Scenario: Power management and peripheral interfacing in cellular-connected TCU modules requiring always-on connectivity and remote wake-up.

IC Role / Device Role / Timing Role: Supplies MCU and modem interfaces via V1/V2; monitors wake sources (CAN, WU1/WU2); reports faults via DIAGN/NINT.

Use Value: Ultra-low 15 µA standby current extends battery life during vehicle sleep; thermal warning allows graceful degradation before shutdown.

Use Scenario: Local actuation control for seat position memory, heating elements, and sunroof motor drivers in comfort systems.

IC Role / Device Role / Timing Role: Four HS drivers directly power resistive/heating loads and position sensors; current monitor (CM) enables real-time load verification.

Use Value: Integrated open-load and overcurrent protection eliminates need for external sense resistors and comparators - improves functional safety compliance.

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	Same QFN32L package and pinout; includes LIN transceiver (ISO 17987-4) in addition to CAN-FD - not present in SPSB081C5-TR.	Required where LIN bus communication is needed alongside CAN-FD (e.g., door module with LIN mirror control).	Select SPSB0815-TR only if LIN interface is mandatory; otherwise SPSB081C5-TR offers identical power management with lower cost and footprint.
TLE9261-2QX	Infineon 32-pin HVPQFN; dual 5 V/3.3 V LDOs, 4× HS drivers, CAN FD, but no integrated current monitor (CM) or DIR/WU2 dual-function pin.	Used in HVAC and lighting modules where analog current feedback is not required and wake-up flexibility is less critical.	Choose TLE9261-2QX when leveraging Infineon's ecosystem or needing higher peak HS current (0.35 A vs. 0.14 A); avoid if CM-based diagnostics are essential.

Compared with SPSB0815-TR, the SPSB081C5-TR removes LIN to reduce complexity and cost while retaining full CAN-FD and power management capability; versus TLE9261-2QX, it provides finer-grained diagnostics (CM, DIR/WU2) and tighter voltage tracking (±20 mV), better suited for ASIL-B–aligned designs requiring precise load monitoring.

Availability

SPSB081C5-TR is available at Aetrix Electronics and suitable for body control modules, telematics units, and gateway applications requiring stable component supply, AEC-Q100 qualification, and long-term automotive lifecycle support.

Supply support for SPSB081C5-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 headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and automotive-grade solutions for industrial and automotive markets.

The SPSB081 product line delivers integrated power management and communication interfaces for automotive electronic control units - engineered specifically for body electronics, gateway nodes, and comfort systems demanding functional safety, low power, and high integration.

FAQ

What is the maximum continuous current rating for each high-side driver in SPSB081C5-TR?

Each of the four high-side drivers (OUT1–OUT4) supports a continuous output current of 0.14 A with R_ON = 7 Ω. This rating is validated under ambient temperatures up to +125 °C and includes built-in overcurrent shutdown and thermal foldback to prevent damage during sustained overload conditions.

Does SPSB081C5-TR support LIN communication?

No, SPSB081C5-TR does not integrate a LIN transceiver. Unlike SPSB0815-TR and SPSB0813-TR variants, the C5 version omits the LIN interface per its product configuration - it supports CAN-FD only (ISO 11898-2/2016, SAE J2284) and is intended for CAN-centric architectures.

How is V2 configured as a tracker of V1 in SPSB081C5-TR?

V2 is configured as a tracker by setting the V2_TKR bit (bit 6) in Control Register 2 (CR2) via SPI. When V2_TKR = 1, V2 outputs 3.3 V tracking V1 ±20 mV; this mode is only valid when V1 is set to 5 V (as on SPSB081C5-TR), per Table 6 in DS14048 Rev 3.

What thermal protection mechanisms are implemented in SPSB081C5-TR?

The device implements two-tier thermal protection: a warning threshold (TW = 140–160 °C) that asserts DIAGN and sets status bits, and dual shutdown thresholds (TSD1 = 165–185 °C, TSD2 > TSD1) that disable outputs progressively. After TSD2, V1 shuts down and wake-up sources are disabled until automatic restart succeeds or VBAT_standby mode activates.

SPSB081C5-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)

SPSB081C5-TR FAQ

1.How can I place an order for SPSB081C5-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for SPSB081C5-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 SPSB081C5-TR reliable?

The price and inventory of SPSB081C5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SPSB081C5-TR is usually 5 days.

3.What payment methods are accepted for SPSB081C5-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SPSB081C5-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SPSB081C5-TR?

SPSB081C5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SPSB081C5-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 SPSB081C5-TR?

For technical support, including SPSB081C5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SPSB081C5-TR requirements.

6.How does Aetrix verify that SPSB081C5-TR is sourced from the original manufacturer or authorized distributors?

All SPSB081C5-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 SPSB081C5-TR meets industry standards.

7.What is the process for return or replacement of SPSB081C5-TR?

All SPSB081C5-TR units undergo pre-shipment inspection (PSI). If there is an issue with SPSB081C5-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 SPSB081C5-TR part is unused and in its original packaging.

Return procedure for SPSB081C5-TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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