MPQ2143DJ-AEC1-LF-Z

MPQ2143DJ-AEC1-LF-Z is an automotive-grade DC-DC buck regulator from Monolithic Power Systems (MPQ2143 family). It integrates the high-side/low-side MOSFETs and control circuitry to provide a compact, high-efficiency step-down converter for automotive applications.
What it does:
- Converts a wide automotive input (12/24V battery range) to a stable, lower output rail for microcontrollers, sensors, and peripherals.
- Offers adjustable output via an external feedback network, with a control scheme suitable for fast transient response.
Key features (typical):
- High efficiency switching regulator with current-mode control
- Enable/disable input, soft-start, and protection features
- Protections: overcurrent/short-circuit, overvoltage, undervoltage lockout, thermal shutdown
- Lead-free (LF) part, automotive-qualified (AEC1), with a specific package variant (Z)
Typical applications:
- Power rails for ECUs, automotive sensors, camera modules, infotainment, LED drivers
datasheet notes:
- For exact electrical specs, pinout, recommended components, and evaluation boards, refer to the MPQ2143DJ-AEC1-LF-Z datasheet on the manufacturer’s site.

Key features of MPQ2143DJ-AEC1-LF-Z (automotive-grade dual buck regulator):
- Automotive qualified: AEC-Q100 (AEC1), lead-free (LF).
- Dual synchronous buck regulators with integrated high/low-side MOSFETs.
- Wide input range: 4.5 V to 42 V (transients higher).
- Output: adjustable per channel via external resistors (typical 0.8 V to about 5 V range).
- Each channel up to ~3 A (typical) output capability.
- Switching frequency: around 2.2 MHz (PWM/current-mode control) for small inductors and fast response.
- Remote sense to improve regulation accuracy.
- Enable/shutdown control and programmable soft-start.
- Protective features: UVLO, overcurrent (cycle-by-cycle), overtemperature, and output overvoltage protection.
- Compact, Pb-free QFN package suitable for automotive applications.
- Wide operating temperature range: typically -40°C to 125°C.
Note: exact per-channel current ratings and output voltage ranges depend on external resistor settings and package variant; consult datasheet for precise numbers.

QFN package: 16-pin, 4×4 mm body, lead-free, automotive-grade (AEC1) and RoHS compliant.

- Pin count: 20 pins (QFN package)
- Function: Automotive-grade synchronous buck DC-DC regulator (integrated MOSFETs) for stepping down input power to rails used in automotive electronics.

- Manufacturer: Monolithic Power Systems, Inc. (MPS).
- Company type: A US-based fabless semiconductor company specializing in power-management ICs (DC-DC converters, PMICs) for automotive, industrial, and consumer markets.