MPQ70336FS-AEC1

MPQ70336FS-AEC1

MPSafe^TM, ASIL-D, 36V, 4A Buck Converter with 4-Channel Voltage Monitor PMIC, AEC-Q100 Qualified

Description

The MPQ70336FS-AEC1 is an ASIL-D hardware capable power management IC (PMIC) featuring a buck converter and an integrated, 4-channel voltage monitor. It is engineered for automotive safety applications that require an off-battery safety power supply and additional voltage rails monitored for safety.

The MPQ70336FS-AEC1 features a synchronous, step-down switching regulator that provides up to 4A of peak output current (I_OUT) with peak current mode control. The configurable switching frequency (f_SW) ranges between 350kHz and 2.5MHz.

High power conversion efficiency across a wide load range is achieved by scaling down f_SW under light-load conditions to reduce the switching and gate driving losses. Frequency foldback helps prevent inductor current (I_L) runaway during start-up. Thermal shutdown provides fault-tolerant operation.

Each of the four voltage monitor inputs has configurable over-voltage (OV) and under-voltage (UV) thresholds. Highly accurate high-frequency (HF) and low-frequency (LF) voltage monitoring can detect when the voltage thresholds are reached. Two of the inputs are differential, making them optimal for remote voltage-sensing to monitor rails with high current levels.

The MPQ70336FS-AEC1 can record the order in which voltage rails are sequenced, as well as their associated timestamps. The device is accessible through an I²C interface.

With the integration of sophisticated functional safety features including built-in self-testing (BIST), diagnostics, and write protection, this device is targeted to support applications with a high automotive safety integrity level up to ASIL-D.

The MPQ70336FS-AEC1 is available in a TQFN-25 (3mmx6mm) package with wettable flanks.

Features & Benefits

Designed for Automotive Applications:
- Load Dump Up to 42V
- Cold Crank Down to 3.1V
- Operating Junction Temperature (T_J) from -40°C to +150°C
- Available in a TQFN-25 (3mmx6mm) Package with Wettable Flanks
- Available in AEC-Q100 Grade 1
Highly Integrated Safety Power Supply:
- 4A Peak Output Current (I_OUT)
- Minimum 65ns On Time and 50ns Off Time
- x4 Voltage Monitors
- x2 Single-Ended Channels, x2 Differential Channels:
  - Adjustable Over-Voltage (OV) and Under-Voltage (UV) Thresholds for High-Frequency (HF) and Low-Frequency (LF) Components: 0.2V to 5.5V
  - Accuracy: ±0.5% for >1V, ±5mV for <1V
- Power Sequence Recording
- Power Good (PG) Output
- Over-Current Protection (OCP) with Hiccup Mode
Optimized for EMC/EMI:
- Frequency Spread Spectrum (FSS) Modulation
- Symmetric VIN Pinout
- CISPR 25 Class 5 Compliant
- 350kHz to 2.5MHz Configurable Switching Frequency (f_SW)
- MeshConnect^TM Flip-Chip Package
Flexibility with Digital Configurability:
- I²C Interface with Packet Error Checking (PEC)
- One-Time Programmable (OTP) Memory
Functional Safety:
- Built-In Self-Testing (BIST)
- Interrupt Output Pin (Fault Reporting)
- Cyclic Redundancy Check (CRC) Protection on Registers
- Write Protection for Critical Registers
- Hardware Capable Up to ASIL-D
- ISO 26262 Functional Safety Certified