SPSA068 - Automotive PMIC with Buck and Precise Voltage Reference | STMicroelectronics
MPN: SPSA068 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.49 | $4.49 |
| 10 | $4.1 | $41.00 |
| 100 | $3.7 | $370.00 |
| 500 | $3.3 | $1,650.00 |
| 1,000 | $2.9 | $2,900.00 |
Drop-in alternatives for SPSA068 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SPSA068-TR
β Drop-Inπ Reference alternative (not in catalog)
SPSA068
β Drop-Inβ In Stock
$2.9 / Unit
View Datasheet βSPSA068
β Drop-Inβ In Stock
$2.9 / Unit
View Datasheet βSPSA068 Maximum Ratings & Electrical Characteristics
| Output Type | Buck (Step-Down) + Voltage Reference |
| Buck Output Voltage Options | 5.0 V, 3.3 V, 1.2 V (adjustable via NVM) |
| Buck Output Current | 0.5 A and 1.0 A |
| Switching Frequency | 0.4/2.4 MHz |
| Reference Voltage Accuracy | 1% |
| Quiescent Current (LPM) | 50 ΞΌA typ |
| Integrated Power MOSFETs | Yes (HS and LS) |
| Control Interface | SPI |
| Watchdog | Window watchdog |
| Reset Output | Yes |
| Package | 32-QFN (5x5 mm) / VFQFN32L |
| Mounting Type | Surface Mount |
| Qualification | AEC-Q100 |
SPSA068 Pin Configuration
| Pin 1 | VIN β Input voltage for buck regulator |
| Pin 2 | SW β Switching node output |
| Pin 3 | GND β Ground |
| Pin 4 | VREF β Precise voltage reference output |
| Pin 5 | SPI_CS β SPI chip select |
| Pin 6 | SPI_CLK β SPI clock |
| Pin 7 | SPI_MOSI β SPI master out slave in |
| Pin 8 | SPI_MISO β SPI master in slave out |
| Pin 9 | RESET β Reset output |
| Pin 10 | WD β Window watchdog input |
| Pin 11 | EN β Enable pin |
| Pin 12 | VOUT β Buck regulator output |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
SPSA068 is suitable for 6 applications: Automotive Body Control Module, Engine Control Unit (ECU), Infotainment System, Advanced Driver Assistance Systems (ADAS), Telematics and Connectivity, Functional Safety Systems.
Automotive Body Control Module
The SPSA068 provides a regulated power supply for MCUs in body control modules, ensuring stable operation of lighting, window, and door control systems. Its AEC-Q100 qualification and integrated watchdog enhance reliability in harsh automotive environments. The buck regulator efficiently steps down battery voltage to 3.3V or 5V for the MCU, while the precise reference ensures accurate analog sensing. The SPI interface allows dynamic configuration of output voltages and monitoring of system status. With low quiescent current in LPM, it supports always-on functions like remote keyless entry. The window watchdog monitors MCU execution, triggering a reset if the software hangs, which is critical for safety. The compact 32-QFN package fits space-constrained PCB layouts. Overall, the SPSA068 simplifies power design and improves system robustness in body control applications.
Recommended
Engine Control Unit (ECU)
In engine control units, the SPSA068 supplies clean and stable power to the MCU, which manages fuel injection, ignition timing, and emissions control. The buck regulator's high efficiency reduces heat dissipation, which is crucial in the high-temperature environment of an engine bay. The 1% accurate reference voltage ensures precise analog-to-digital conversions for sensor inputs like temperature and pressure. The window watchdog and reset output provide functional safety, detecting software faults and resetting the MCU to prevent engine damage. The SPI interface enables real-time monitoring of power supply status and configuration of output voltages. The SPSA068's AEC-Q100 qualification guarantees reliable operation over the automotive temperature range. Its integrated power MOSFETs reduce external component count, saving PCB space. The low-power mode helps reduce battery drain when the vehicle is off. Overall, the SPSA068 is a robust power solution for ECUs, enhancing performance and safety.
Recommended
Infotainment System
The SPSA068 powers the MCU in infotainment systems, providing a stable 3.3V or 5V rail for the processor and peripherals. Its low quiescent current in LPM is ideal for maintaining standby functions like clock and memory retention. The buck regulator's high efficiency reduces heat, which is important in the confined space of a dashboard. The precise reference voltage ensures accurate audio and video signal processing. The SPI interface allows the infotainment system to configure output voltages and monitor power status. The window watchdog enhances system reliability by resetting the MCU if software becomes unresponsive. The compact 32-QFN package fits the tight PCB layouts of modern infotainment units. The SPSA068's AEC-Q100 qualification ensures reliable operation in the automotive environment. Overall, it provides a compact, efficient, and reliable power solution for infotainment systems.
Recommended
Advanced Driver Assistance Systems (ADAS)
In ADAS applications, the SPSA068 provides reliable power to MCUs that process sensor data for features like lane keeping and collision avoidance. The buck regulator's high efficiency and low quiescent current are essential for always-on systems. The 1% accurate reference ensures precise analog signal processing for radar and camera inputs. The window watchdog and reset output are critical for functional safety, as required by ISO 26262. The SPI interface allows configuration and monitoring of the power supply. The SPSA068's AEC-Q100 qualification ensures reliable operation in the demanding automotive environment. Its compact package saves space in the crowded ADAS module. The integrated power MOSFETs reduce external components, improving reliability. Overall, the SPSA068 is a key component in ADAS power management, ensuring system safety and performance.
Recommended
Telematics and Connectivity
The SPSA068 powers MCUs in telematics units that provide vehicle connectivity, such as GPS, cellular, and V2X communication. Its low quiescent current in LPM is crucial for maintaining communication modules in standby mode. The buck regulator efficiently steps down battery voltage to the required levels, reducing heat in the compact telematics enclosure. The precise reference voltage ensures accurate signal processing for communication protocols. The SPI interface allows the telematics unit to configure output voltages and monitor power status. The window watchdog enhances system reliability by resetting the MCU if software faults occur. The SPSA068's AEC-Q100 qualification ensures reliable operation in the automotive environment. Its compact package fits the space-constrained telematics module. Overall, it provides a reliable and efficient power solution for telematics applications.
Recommended
Functional Safety Systems
The SPSA068 is designed for functional safety applications, providing a window watchdog and reset output to monitor MCU execution. It is AEC-Q100 qualified and supports ISO 26262 requirements. The buck regulator provides a stable power supply, while the precise reference ensures accurate voltage monitoring. The SPI interface allows configuration of safety parameters. In safety-critical systems like airbag controllers and braking systems, the SPSA068 ensures that the MCU operates correctly and can be reset if a fault is detected. Its low quiescent current is beneficial for always-on safety monitoring. The compact package saves space in safety modules. The integrated power MOSFETs reduce component count, improving reliability. Overall, the SPSA068 is a key component in functional safety systems, enhancing system integrity and compliance.
Recommended
Recommended Products Summary
Engineering reference data for SPSA068 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SPSA068-TR | SPSA068 | SPSA068 |
|---|---|---|---|---|
| Package | 32-QFN (5x5 mm) | 32-QFN (5x5 mm) - same | 32-QFN (5x5 mm) - same | 32-QFN (5x5 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Buck Output Voltage Options | 5.0 V, 3.3 V, 1.2 V | 5.0 V, 3.3 V, 1.2 V | 5.0 V, 3.3 V, 1.2 V | 5.0 V, 3.3 V, 1.2 V |
| Buck Output Current | 0.5 A and 1.0 A | 0.5 A and 1.0 A | 0.5 A and 1.0 A | 0.5 A and 1.0 A |
| Switching Frequency | 0.4/2.4 MHz | 0.4/2.4 MHz | 0.4/2.4 MHz | 0.4/2.4 MHz |
| Reference Voltage Accuracy | 1% | 1% | 1% | 1% |
| Quiescent Current (LPM) | 50 ΞΌA typ | 50 ΞΌA typ | 50 ΞΌA typ | 50 ΞΌA typ |
| Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
Key Differentiators
- Integrated buck regulator and precise reference in one package (vs Discrete buck converter + reference)
- AEC-Q100 qualified for automotive applications (vs Non-automotive PMICs)
- Low quiescent current of 50 ΞΌA in LPM (vs PMICs with higher quiescent current)
Design Notes
Ensure adequate input and output capacitance for the buck regulator. A 10 ΞΌF ceramic capacitor on the input and a 22 ΞΌF ceramic capacitor on the output are recommended for stable operation. Place capacitors close to the pins to minimize parasitic inductance.
For the switching node (SW), keep the trace short and wide to minimize parasitic inductance and EMI. Use a solid ground plane underneath the IC to provide a low-impedance return path. Follow the layout guidelines in the STEVAL-SPSA068 evaluation board user manual (UM3488).
Configure the NVM settings correctly for the desired output voltage and switching frequency. Incorrect settings can lead to improper operation. Also, ensure the SPI interface is properly initialized to avoid communication errors. Refer to the datasheet for the configuration procedure.
Compliance Information
AEC-Q100 qualified per ST datasheet. RoHS and REACH compliance assumed based on ST's standard compliance, but not explicitly stated in the provided data.
