MPQ73350FS-AEC1

MPQ73350FS-AEC1

MPSafe^TM, 40V, High Output Current, Synchronous Dual Buck Converter, AEC-Q100 Qualified

Description

The MPQ73350FS-AEC1 is a synchronous dual buck converter designed for automotive safety applications. It has a wide input voltage (V_IN) range, fast transient response, high efficiency, rich monitoring and protection features, and good EMI performance.

The MPQ73350FS-AEC1 can be selected to operate in either 2-channel mode or single-output multi-phase mode. For 2-channel mode, the output current (I_OUT) for each buck is up to 7A with the capability for 12A with a heatsink. Multiple MPQ73350FS-AEC1 chips can be placed in parallel to support up to four phases. The switching frequency (f_SW) is configurable from 200kHz to 2.2MHz, or it can be synchronized via an external clock signal. Frequency spread spectrum (FSS) is featured to improve EMI performance.

Comprehensive protection features include input under-voltage lockout (UVLO), input over-voltage protection (OVP), cycle-by-cycle peak current limiting, output OVP, output short-circuit protection (SCP), and thermal shutdown. Different configurations can easily be configured via the selectable SPI or I²C interface. The one-time programmable (OTP) memory allows for vast flexibility through programmability.

The MPQ73350FS-AEC1 is available in a TQFN-28 (5mmx6mm) package, and is AEC-Q100 qualified.

Features & Benefits

High Output Power (P_OUT) Capability:
- 14A or 24A (with Heatsink) Parallel Channels
- 7A or 12A (with Heatsink) per Channel
- Multi-Chip, Multi-Phase Capability
- Low-Resistance High-Side and Low-Side MOSFETs (HS-FET and LS-FET, Respectively)
Built for Automotive Applications:
- Load Dump Up to 40V
- Cold Crank Down to 3V
- Wide Output Voltage (V_OUT) Range:
  - Up to 9V with Internal FB Divider
  - Up to 15V with External FB Divider
- Low Quiescent Current (I_Q) and Shutdown Current (I_SD)
- Zero-Delay PWM^TM (ZDP^TM) Control
Optimized for EMI/EMC:
- Frequency Spread Spectrum (FSS)
- 200kHz to 2.2MHz Switching Frequency (f_SW)
- Quiet-FET^TM Switching Technology
- CISPR 25 Class 5 Compliant
- Mesh-Connect^TM Flip-Chip Package

Advanced Monitoring and Protection Features:

Windowed Watchdog Timer
8-Bit SAR Analog-to-Digital Converter (ADC) Monitors the Output Current (I_OUT), V_OUT, Input Voltage (V_IN), and Temperature
Cycle-by-Cycle Current Limiting
Input/Output Over-Voltage Protection (OVP)
Output Short-Circuit Protection (SCP)
Thermal Shutdown (TSD)

Achieves Functional Safety Goals:

MPSafe^TM Certified to ISO 26262
Built-In Self-Testing (BIST)
Bandgap Redundancy
Real-Time Register Cyclic Redundancy Check (CRC)
Protected Memory and Registers

Additional Features:

Internal Soft Start (SS)
Clock Synchronization
Power Good (PG) Indicators
Selectable Advanced Asynchronous Modulation (AAM) Mode or Forced Continuous Conduction Mode (FCCM)
Selectable Serial Peripheral Interface (SPI) or I²C Interface with Optional CRC
One-Time Programmable (OTP) Memory
Available in a TQFN-28 (5mmx6mm) Package with Wettable Flanks
Available in AEC-Q100 Grade 1