STMicroelectronics SPSA068 Buck Voltage Regulator PMIC
STMicroelectronics SPSA068 Buck Voltage Regulator Power Management IC (PMIC) features a precise voltage reference for MCU applications. All the regulators have internal power switches. Low Power Mode (LPM) allows operation under light-load conditions, reducing the quiescent current to 50μA typical. An internal programmable memory allows the selection of the primary device parameters like output voltages and switching frequencies. An SPI interface can be used for diagnostics, programming, monitoring, and an external window watchdog. The STMicroelectronics SPSA068 PMIC offers features to support applications that need to fulfill functional safety requirements as defined by the Automotive Safety Integrity Level.
Features
- AEC-Q100 qualified
- Pre-SMPS BUCK regulator, adjustable via NVM to 5.0V, 3.3V, and 1.2V at 0.5A and 1.0A load current, 0.4/2.4MHz; Via an external resistive divider, it can regulate a voltage between 5V and 1.2V
- Precise voltage reference (1%), adjustable via NVM to 5.0V, 3.3V, and 1.2V at 20mA load current
- <5μA standby mode (IQ)
- Low 50μA quiescent current in low-power active mode
- SPI interface with CRC
- Programmable soft start
- Voltage supervisors
- Spread frequency spectrum
- Reset output
- Adjustable window watchdog supervisors
- VREF tracking of VBUCK in the power-up phase
- Short circuit protected outputs and fault detection pin to microcontroller
- Low external component number
- Thermal warning and thermal shutdown
- 5.0mm x 5.0mm x 1.0mm, QFN32L Epad package
Applications
- Portable devices
- Consumer electronics
- Industrial automation
- Telecommunications
- Automotive
- IoT devices
- Medical equipment
- LED drivers
Specifications
- 4.2V to 19V operating voltage range
- 3.8V to 4.2V undervoltage threshold
- 0.05V to 0.2V undervoltage hysteresis
- 40μs typical undervoltage filter time
- 2.4MHz typical main oscillator frequency
- 0.4MHz typical auxiliary oscillator frequency
- ±6% to ±15% line transient regulation
- ±10% to ±15% load transient regulation
- 200mΩ to 395mΩ switch-on resistance range
Evaluation Board
STMicroelectronics STEVAL-SPSA068 Evaluation Board
Based on the SPSA068 buck voltage regulator for automotive MCU applications.
Block Diagram
Complete Your Design
STMicroelectronics Standard Products
A broad range of drop-in replacements for general-purpose analog ICs, discretes, and serial EEPROMs.
Published: 2024-11-25
| Updated: 2025-09-24