NXP Semiconductors MFS5600AMMABESR2

Overview

MFS5600AMMABESR2 from NXP Semiconductors is a QM-grade automotive dual-buck power management IC integrating a 3 A internal-FET buck regulator (SW1) and a 15 A external-FET buck controller (SW2), both configured for 5 V output at 450 kHz, with ±2 % output accuracy, AEC-Q100 Grade-1 qualification, and operation from –40 °C to 150 °C junction temperature. It serves as primary voltage regulation and functional safety monitoring in infotainment and ADAS domain controllers.

For engineers reviewing the MFS5600AMMABESR2 datasheet, MFS5600AMMABESR2 pinout, MFS5600AMMABESR2 application, or MFS5600AMMABESR2 equivalent, this page delivers verified technical context, confirmed pin functions, real-world automotive use cases, and validated alternative options - all grounded in NXP's FS5600 Rev. 4.2 product data sheet and ordering documentation.

Technical Context

The MFS5600AMMABESR2 implements two independent buck topologies: SW1 uses peak-current-mode control with integrated high- and low-side FETs (R_DS(on) = 105 mΩ / 46 mΩ), internal current sensing, and programmable soft-start; SW2 employs external MOSFETs driven by dedicated gate outputs (SW2GHS/SW2GLS), current-sense inputs (SW2CSP/SW2CSN), and compensation (SW2COMP) for flexible high-current design.

As a QM variant, it omits windowed watchdog timer, FS0B fail-safe output, VMON1–VMON2 inputs, and LBIST - retaining only GPIO1/VDDOTP, GPIO2/VMON3, GPIO3/VMON4 (configured as GPOs), I²C interface (SCL/SDA), PGOOD1/PGOOD2, and EN1/EN2 enable controls - while supporting OTP-based configuration of output voltage, switching frequency, PFM/PWM mode, and current limit.

Key Specifications

Pinout & Package

Package: 32-lead 5 mm × 5 mm WF-QFN (SOT617-24(SC)) with exposed thermal pad (EPAD) requiring ground connection via multiple vias.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-buck automotive power management applications.

Compared with MFS5600AMMABESR2, MFS5600AMBAFES adds mandatory safety infrastructure for ASIL B systems but increases design complexity, while MPQ4436-AEC1 reduces integration and configurability to meet basic automotive buck needs at lower BOM cost.

Availability

MFS5600AMMABESR2 is available at Aetrix Electronics and suitable for infotainment, ADAS domain controllers, and telematics control units requiring stable component supply, AEC-Q100-compliant performance, and long-term automotive lifecycle support.

Supply support for MFS5600AMMABESR2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on automotive, industrial, and IoT applications, with deep expertise in functional safety, secure connectivity, and power management ICs.

The FS5600 product line was designed specifically for automotive domain controllers needing dual-rail, configurable, and AEC-Q100-qualified power regulation - balancing integration, safety flexibility, and thermal resilience across QM, ASIL B, and enhanced ASIL B variants.

FAQ

What is the output voltage configuration of the MFS5600AMMABESR2?

The MFS5600AMMABESR2 is factory-configured via OTP for 5 V output on both SW1 (integrated 3 A buck) and SW2 (external-FET 15 A controller), with ±2 % accuracy across –40 °C to 150 °C. SW1 uses an internal resistor divider; SW2 requires external feedback resistors set to 5 V. This fixed 5 V/5 V configuration is confirmed in Table 2 of the FS5600 datasheet for part number MFS5600AMMABES.

Does the MFS5600AMMABESR2 include a watchdog timer or fail-safe output?

No, the MFS5600AMMABESR2 is a QM-grade device and does not include a windowed watchdog timer or FS0B fail-safe output. These features are exclusive to ASIL B and Enhanced ASIL B variants (e.g., MFS5600AMBAFES). The QM version retains only PGOOD1/PGOOD2, GPIOs, and I²C - consistent with its role in non-safety-critical automotive subsystems.

What package type and thermal characteristics apply to the MFS5600AMMABESR2?

The MFS5600AMMABESR2 uses a 32-pin 5 mm × 5 mm WF-QFN (SOT617-24(SC)) with exposed EPAD. Its thermal resistance is R_θJA = 29.4 °C/W (customized 2s6p board), enabling operation up to 150 °C junction temperature. The EPAD must be connected to ground via ≥4 thermal vias to maintain safe thermal performance in automotive under-hood environments.

Can the MFS5600AMMABESR2 be used without external MOSFETs for both regulators?

Yes - SW1 operates fully integrated with internal high- and low-side FETs delivering up to 3 A at 5 V. SW2, however, requires external high-side and low-side MOSFETs (driven by SW2GHS/SW2GLS) and current-sense circuitry (via SW2CSP/SW2CSN). The MFS5600AMMABESR2 provides only the controller logic, gate drivers, and feedback interface for SW2; external FETs are mandatory for that channel.

Is I²C communication supported on the MFS5600AMMABESR2, and what is its purpose?

Yes, the MFS5600AMMABESR2 supports I²C via SCL and SDA pins (pins 2 and 3) for OTP programming, status register reads (e.g., PGOOD, fault flags), and runtime configuration. During development, GPIO1/VDDOTP serves as OTP supply; in production, I²C enables field firmware updates and health monitoring - critical for telematics and infotainment modules requiring post-deployment adaptability.