MPQ70331FS-AEC1

MPQ70331FS-AEC1

45V, 3A HV Buck, 2A LV Buck, 250mA LV Boost, ASIL-D PMIC, AEC-Q100 Qualified

Description

The MPQ70331FS-AEC1 is an ASIL-D compliant power management integrated circuit (PMIC) with advanced safety features for automotive applications. It consists of a high-voltage (HV) primary synchronous buck converter, a low-voltage (LV) secondary synchronous buck converter, and a synchronous boost converter with excellent transient response.

Voltage monitoring is implemented via a voltage supervisor to monitor the battery input voltage (V_IN), output rails, and two external channels, along with critical internal voltage signals, including the VCC voltage (V_CC) and bandgap reference. Clock monitoring, leakage monitoring, and thermal monitoring are also implemented.

Built-in self-testing (BIST) is included for critical analog and logic functions. A failsafe state machine manages fault handling and controls the safety outputs. An integrated, configurable watchdog can be configured in window and Q&A modes. The safety-related blocks have independent voltage regulators, bandgaps, and oscillators, which offer redundancy to achieve failsafe operation.

The serial peripheral interface (SPI) allows for flexibility through configurability. The one-time programmable (OTP) memory allows settings to be permanently stored. SPI transactions and the data in the registers and OTP are protected via cyclic redundancy check (CRC).

The MPQ70331FS-AEC1 is available in a TQFN-34 (6mmx6mm) package, and it is AEC-Q100 qualified.

Features & Benefits

Built for Tough Automotive Transients:
- Load Dump Up to 45V
- Cold Crank Down to 4.5V
Optimized Board Size and BOM:
- 3A High-Voltage (HV) Buck Regulator
- 2A Low-Voltage (LV) Buck Regulator
- 250mA LV Boost Regulator
Optimized for EMC/EMI:
- Configurable Fixed Switching Frequency (f_SW) from 0.38MHz to 2.5MHz
- Frequency Spread Spectrum (FSS) for EMI Reduction
- CISPR 25 Class 5 Compliant
Advanced Monitoring:
- Window or Q&A Watchdog
- Battery Failure Pre-Warning
- Microcontroller Unit (MCU) Alive Detection
- Clock Monitoring
- Reset and Interrupt to the MCU
- Error Input Signal Monitoring
- Diagnostic Output Pin
- Short-Circuit Protection (SCP) and Over-Current Protection (OCP)
- Thermal Warning and Shutdown
Functional Safety:
- Built-In Self-Testing (BIST)
- Hardware Capability Up to ASIL-D
- Documents Available for ISO26262 System Design to ASIL-D
- Failure Modes Effects and Diagnostic Analysis (FMEDA)
- Safety Manual
Additional Features:
- Buffered Voltage Reference Output
- Serial Peripheral Interface (SPI) with Cyclic Redundancy Check (CRC)
- One-Time Programmable (OTP) Memory
- Available in a TQFN-34 (6mmx6mm) Package with Wettable Flanks
- Available in AEC-Q100 Grade 1
MPSafe^TM: Developed for Functional Safety Applications: ISO 26262 Compliant