MPQ70333FS-AEC1

MPQ70333FS-AEC1

MPSafe^TM, 45V, 3A Buck and 250mA Boost ASIL-D PMIC, AEC-Q100 Qualified

概要

The MPQ70333FS is an ISO 26262, ASIL-D, functional safety capable power management IC (PMIC) with advanced safety features for automotive applications. It consists of a high-voltage (HV) primary synchronous buck converter and a low-voltage (LV) secondary 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 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 MPQ70333FS is available in TQFN-34 (6mmx6mm) package, and is AEC-Q100 qualified.

機能と利点

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
- 250mA Low-Voltage (LV) Boost Regulator
Optimized for EMC/EMI:
- 380kHz to 2.5MHz Configurable Fixed Switching Frequency (f_SW)
- Frequency Spread Spectrum (FSS) for EMI Reduction
- CISPR 25 Class 5 Compliant
Advanced Monitoring:
- Window or Q&A Watchdog
- Battery Failure Pre-Warning
- Microcontroller (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 Capable Up to ASIL-D
- Documents Available for ISO 26262 System Design to ASIL-D
- Failure Modes Effects and Diagnostic Analysis (FMEDA)
- Safety Manual
Additional Features:
- Buffered Voltage Reference Output
- SPI Interface 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