- MPQ8835A-AEC1
MPQ8835A-AEC1
36V, 6A, Four-Switch, Synchronous Buck-Boost Converter with I2C Interface, AEC-Q100 Qualified
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Description
The MPQ8835A-AEC1 is a 36V synchronous four-switch buck-boost converter with integrated MOSFETs. The wide 3V to 36V input voltage (VIN) range makes the device well-suited for multi-purpose automotive and industrial applications.
The device can deliver up to 6A output current (IOUT) at certain input supply ranges with excellent efficiency. The fully integrated four-switch configuration allows the chip to flexibly change the converter topology between buck, boost, and buck-boost mode. This optimizes performance and efficiency with input voltages that are above, below, or even equal to the output voltage (VOUT). It also ensures seamless transitions between the adjacent operational regions.
The I2C interface and one-time programmable (OTP) memory provide flexibility for configurable features. The various parameters can be adapted by writing the settings in the device in such a way that no hardware changes are required. The diagnostic functions can also be read by the I2C bus.
The switching frequency (fSW) can be configured as 280kHz, 420kHz, 600kHz, or 1MHz. In addition, the configurable frequency spread spectrum (FSS) function can dither fSW periodically for improved EMI performance.
Robust fault protections 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.
The MPQ8835A-AEC1 requires a minimum number of readily available, standard external components. The MPQ8835A-AEC1 is available in a small QFN-19 (4mmx5mm) with wettable flanks, and it is available in AEC-Q100 Grade 1.
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Features & Benefits
- Designed to Handle Automotive Transients:
- 3V to 36V Wide Input Voltage (VIN) Range
- Load Dump Up to 40V
- Cold Crank Down to 3V
- 1V to 24V Output Voltage (VOUT) Range
- Up to 6A of Continuous Output Current (IOUT)
- Single-Channel, Four-Switch, Synchronous Buck-Boost Configuration:
- Internal Buck High-Side Power MOSFET (HS-FET)
- Internal Buck Low-Side (LS) Synchronous Rectifier
- Internal Boost Low-Side Power MOSFET (LS-FET)
- Internal Boost High-Side (HS) Synchronous Rectifier
- Extends Vehicle Battery Life:
- 1μA Shutdown Current
- 130μA Quiescent Current (IQ)
- Easy-to-Optimize Efficiency and EMI Performance:
- Configurable 280kHz, 420kHz, 600kHz, or 1MHz Switching Frequency (fSW)
- Switching Frequency Spread Spectrum (FSS)
- Configurable Switching Speed
- Rich Protections and Diagnostics:
- Input Under-Voltage Lockout (UVLO)
- Cycle-by-Cycle Current Limiting
- Over-Current Protection (OCP)
- Output Over-Voltage Protection (OVP)
- Input Over-Voltage Protection (OVP)
- Output Under-Voltage Protection (UVP)
- Over-Temperature Shutdown
- Additional Features:
- Integrated 5V/60mA LDO to Supply External Microcontroller Unit (MCU)
- I2C-Configurable Reference Voltage (VREF) Range: 0.1V to 2.147V with 1mV Resolution
- I2C-Configurable ALT Indicates Faults and Events
- Configurable I2C Slave Address
- Line Drop Compensation
- Enable (EN) Shutdown Passive Discharge
- Accurate Output Current Monitor
- Selectable Automatic Pulse-Frequency Modulation (PFM) Mode/Pulse-Width Modulation (PWM) Mode and Forced PWM Mode
- One-Time Programmable (OTP) Memory for Default Parameter Setting
- Available in a QFN-19 (4mmx5mm) Package
- Available with Wettable Flanks
- Available in AEC-Q100 Grade 1
- Functional Safety System Design Capable:
- MPSafeTM Compatible - Functional Safety Supporting Document Available

Active Part Numbers:
MPQ8835AGVE-xxxx-AEC1-Z MPQ8835AGVE-xxxx-AEC1-P MPQ8835AGVE-0000-AEC1-Z MPQ8835AGVE-0000-AEC1-P
Part numbers ending in P and Z are the same parts. P and Z only indicates reel size.
Meaning of P & Z
MPQ8835A-AEC1 Resources
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PRODUCT CATEGORY
STEP-DOWN/STEP-UP (BUCK-BOOST) CONVERTERS AND CONTROLLERSPRODUCT CATEGORY -
APPLICATION
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APPLICATION
DISPLAY (NAVIGATION, HEADS-UP, CLUSTER)APPLICATIONAutomotive displays — which include the center display, heads-up display (HUD), and gauge instrument cluster — show key information and interactive content to the driver. The center information display is connected to the head unit, and provides navigation and other in-cabin infotainment controls. The automotive HUD and gauge instrument cluster provide easy-to-access information for the driver. Th...
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APPLICATION
INFOTAINMENT SYSTEMSAPPLICATIONAutomotive in-vehicle infotainment systems are becoming increasingly software-driven to enhance safety and security, as well as the overall driving experience. Modern cars integrate driving and environmental information, passenger entertainment, wireless connections, and navigation into a centralized infotainment system architecture. However, with the rise of sophisticated in-vehicle infotainment ...
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REARVIEW CAMERAS (OFF BATTERY)APPLICATIONRearview cameras are perhaps the most well-known camera subsystem used in advanced driver assistance systems (ADAS) applications. As this feature is being offered and expected in more and more vehicles, these camera systems must offer high integration and fast data processing to enable accurate, real-time monitoring of possible hazards behind the vehicle and channeling information directly to an L...
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APPLICATION
DRIVER MONITORING SYSTEMSAPPLICATIONDriver monitoring systems are one of the latest developments in automotive safety technology. As part of a holistic human-machine interface (HMI), driver monitoring systems track vital sign parameters and driver attentiveness, so that in the event that the driver is unable to operate the vehicle, assistance can be provided. Of course, advanced new features add design complexity and additional cons...
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APPLICATION
SENSOR FUSION DOMAIN CONTROLLERSAPPLICATIONPerception-sensing systems have become a popular ADAS offering in new vehicles, and will continue to expand as new cars integrate radar with cameras and even LIDAR systems. However, each of these sensors has strengths and limitation — thats where sensor fusion comes in. By combining the inputs from all of the cars perception-sensing systems, the driver is provided with the best possible informatio...
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ARTICLE
CHOOSING THE PROPER PARAMETERS IN FREQUENCY SPREAD SPECTRUM (FSS) DESIGNARTICLEThe frequency spread spectrum (FSS) technique has been widely applied in power converters to reduce electromagnetic interference (EMI) noise. However, in practice, there are multiple parameters in FSS design that must be considered to optimize EMI performance with minimal side effects. This article introduces FSS parameters such as modulation shape, frequency, and depth, and analyzes their impact ...
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ARTICLE
DESIGN CONSIDERATIONS TO SUSTAIN AUTOMOTIVE CRANK CONDITIONSARTICLEModern vehicles using 12V battery systems are subjected to a number of transient conditions. Some transients involve high-voltage pulses, while others may be under low-voltage conditions. Crank transients are low-voltage conditions that occur when a car engine starts, and the car battery drops several volts below its normal operating range for a brief time. The requirements to maintain normal veh...
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