Технические характеристики
MPQ2179AGQHE-AEC1-Z is an AEC-Q100 Grade 1 qualified automotive-grade synchronous step-down DC-DC converter from Monolithic Power Systems, integrating high-side and low-side power MOSFETs inside a single chip for compact point-of-load power conversion.
Suffix Explanation
- MPQ2179A: Automotive buck converter core model with enhanced performance
- GQHE: 8-pin ultra-miniature QFN surface mount package specification
- AEC1: AEC-Q100 Grade 1 automotive reliability certification
- -Z: Standard tape-and-reel packaging for automated SMT assembly; -P stands for tray packaging
1. Core Electrical Specifications
Input Parameters
- Operating input voltage range: 2.5 V ~ 5.5 V DC
- Built-in input undervoltage lockout to prevent unstable power-up under low input voltage
Output Parameters
- Continuous peak output current: 3 A
- Adjustable output voltage range: 0.6 V ~ 5 V, set via external feedback resistor divider
- Fixed switching frequency: 2.4 MHz, supporting small-size peripheral inductors and capacitors
- Constant On-Time (COT) control architecture for ultra-fast load transient response and simple loop compensation
- Feedback voltage precision reaches 1% for stable output voltage regulation
- Supports 100% maximum duty cycle operation for low dropout scenarios
- Equipped with enable pin for system power sequence control, external soft-start pin to suppress inrush current during startup, and open-drain Power Good pin to indicate stable output voltage
- Internal MOSFET on-resistance: 65 mΩ for high-side switch and 35 mΩ for low-side switch to maintain high conversion efficiency
2. Integrated Comprehensive Protection Functions
- Cycle-by-cycle over-current limiting protection to avoid excessive inductor current
- Output over-voltage protection to prevent downstream chip damage caused by abnormal high voltage
- Hiccup-mode short-circuit auto-recovery protection when output terminal is shorted
- Thermal shutdown protection that disables switching signals when junction temperature exceeds threshold and restarts operation after temperature cools down
- Built-in output discharge function to pull down output voltage rapidly after device shutdown
3. Package & Mechanical Information
- Package Type: 8-pin QFN with exposed thermal pad
- Package dimension: 1.5 mm × 2.0 mm ultra-small footprint
- Moisture Sensitivity Level: MSL 1, no mandatory time limit for reflow soldering after package opening
- Side tin plating process improves solderability and production yield during PCB mounting
4. Environmental & Compliance Standards
- Operating junction temperature range: -40 ℃ ~ +150 ℃
- Strictly compliant with AEC-Q100 Grade 1 automotive electronic component reliability standards
- RoHS lead-free and halogen-free compliant, fully conforming to REACH regulatory requirements
- Designed to withstand harsh electromagnetic interference inside vehicle electronic systems
5. Typical Application Scenarios
Power supply for automotive instrument clusters, in-vehicle infotainment and navigation systems Telematics control units, automotive camera modules and smart key electronic circuits Battery-powered portable industrial equipment and handheld detection instruments Embedded control boards for intelligent vehicle body electronic modules Miniaturized IoT terminal and sensor power conversion modules inside passenger vehicles
LXB Semicon supplies original MPS MPQ2179AGQHE-AEC1-Z automotive-grade 3A synchronous buck switching regulator IC
