AC7815-PMIC
Automotive multi-channel PMIC with triple output regulators and power sequencing for MCU power management
Product Overview
Description
The AC7815-PMIC is a multi-channel power management IC designed for automotive MCU power supply applications.
With triple output regulators (core, I/O, analog), integrated power sequencing, and AEC-Q100 qualification, it provides complete power solution for automotive MCUs.
The device includes voltage monitoring, watchdog timer, and comprehensive protection features.
Product Series
AC
Primary Application
MCU power supply systems
Key Features
- Triple output voltage regulators
- Integrated power sequencing
- Independent voltage monitoring
- Watchdog timer with programmable timeout
- Power good indicators
- Thermal shutdown protection
- Current limiting per channel
- AEC-Q100 Grade 1 qualified
Specifications
| Input Voltage | 3.5V to 40V |
|---|---|
| Output Channels | 3 (1x core, 1x I/O, 1x analog) |
| Output Current | 1.5A total (configurable) |
| Power Sequencing | Programmable delay |
| Voltage Monitoring | Independent per channel |
| Package | TSSOP-24, QFN-32 |
Applications
MCU power supply systems
Power conversion and supply
Automotive ECU power
Automotive and EV electronics
Multi-rail power systems
Electronic system design
Safety-critical power
Electronic system design
ADAS system power
Automotive and EV electronics
FAE Expert Insights
"The AC7815-PMIC is my go-to solution for multi-rail MCU power supply designs. The integrated triple regulators eliminate the need for multiple discrete PMICs, reducing BOM cost and PCB area. The programmable power sequencing ensures proper MCU startup with controlled voltage ramping. I have successfully used this PMIC in multiple ECU designs with complex power requirements. The independent voltage monitoring provides early warning of power supply issues. The watchdog timer adds an extra layer of system reliability. For automotive MCU applications requiring multiple power rails, this PMIC offers excellent integration and value."
Integrated triple-output PMIC with sequencing and monitoring for MCU applications
— Dr. Michael Chen, BeiLuo
Frequently Asked Questions
How does the power sequencing work?
The AC7815-PMIC provides programmable power sequencing with configurable delay between regulator turn-on. This ensures proper startup order for MCUs requiring specific power-up sequences. The sequencing is configured via external resistors or SPI interface. Each regulator has independent enable control and power-good indication.
Programmable sequencing ensures proper MCU startup order and prevents latch-up.
What is the purpose of voltage monitoring?
Independent voltage monitoring for each channel provides early warning of power supply issues. The monitoring circuits detect undervoltage and overvoltage conditions. This enables the MCU to take corrective action or enter safe state. Voltage monitoring is essential for functional safety applications.
Voltage monitoring provides power supply health monitoring for safety systems.
Can the watchdog timer be disabled?
Yes, the watchdog timer can be enabled or disabled via SPI configuration. When enabled, the timeout period is programmable. The watchdog requires periodic servicing by the MCU. If not serviced within the timeout period, the PMIC can reset the MCU or trigger an interrupt.
Enable watchdog for safety-critical applications, disable for development.
What protection features are included?
The AC7815-PMIC includes comprehensive protection features: current limiting per channel, thermal shutdown, undervoltage lockout, and overvoltage protection. These features protect both the PMIC and the powered MCU from damage. Fault conditions are reported via status registers.
Comprehensive protection ensures reliable operation in harsh automotive environments.
Is AC7815-PMIC suitable for ASIL applications?
Yes, the AC7815-PMIC is designed for ASIL applications with independent voltage monitoring, watchdog timer, and comprehensive diagnostics. These features support functional safety requirements. The PMIC can be used in systems requiring up to ASIL-D safety levels when combined with appropriate safety MCU.
AC7815-PMIC supports ASIL applications with safety monitoring features.