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L9779 - Multifunction Engine Management PMIC | STMicroelectronics
The L9779 from STMicroelectronics is a multifunction integrated circuit designed specifically for automotive engine management systems. Implemented in BCD6S technology, this power management IC integrates multiple functions including injector drivers, starter relay drivers, and power management features in a 64-pin HiQUAD package. It is engineered to operate reliably in the harsh automotive environment, supporting direct battery connection and key-switch control. A multifunction IC for engine management is a specialized power management device that consolidates several discrete functions—such as injector drivers, relay drivers, voltage regulators, and diagnostic interfaces—into a single package. In the system hierarchy, it sits between the engine control unit (ECU) microcontroller and the high-power actuators (fuel injectors, starter relays), translating low-power logic signals into high-current drive capabilities. This integration reduces board space, improves reliability, and simplifies the overall ECU design. Key features of the L9779 include four injector driver stages (OUT1-4) capable of driving high-current inductive loads, two starter relay drivers (OUT13 and OUT14), and a power latch/SEO (Start Enable Output) mode that allows direct key-switch shut-off access to critical outputs. The device operates from a wide battery voltage range, typically 6V to 28V, and includes protection features such as over-temperature shutdown, over-current limiting, and diagnostic feedback for fault detection. Technically, the L9779 is built on ST's BCD6S process, which combines Bipolar, CMOS, and DMOS transistors on a single die. This allows efficient high-current switching (DMOS) alongside precise analog control (bipolar) and low-power digital logic (CMOS). The device communicates with the ECU via a serial peripheral interface (SPI) in the L9779WD-SPI variant, enabling real-time diagnostics and configuration. The 64-pin HiQUAD package provides excellent thermal performance, with a low thermal resistance that supports continuous operation at high ambient temperatures typical of engine compartments. Typical applications include electronic fuel injection (EFI) systems, engine management units for gasoline and diesel engines, and automotive body control modules requiring high-current actuator drivers. The L9779 is also used in the ST SPC572L MCU-based EFI solution, where it pairs with the SPC572L64F2 microcontroller to form a complete engine control platform. When designing with the L9779, ensure adequate PCB copper area for heat dissipation, especially when driving multiple injectors simultaneously. The power latch mode must be configured correctly to meet the system's safety requirements, and the SPI interface (if used) should be properly terminated to avoid communication errors.
L9779WDAT2 - Multifunction Engine Management PMIC | STMicroelectronics
The STMicroelectronics L9779WDAT2 is a multifunction automotive Power Management IC (PMIC) engineered specifically for engine management applications, integrating multiple power stages, configurable drivers, and an SPI communication interface into a single 64-pin HiQUAD-64 power package. The device is built on ST's proprietary BCD6S mixed-signal process technology and operates from a 2.9V to 5.5V supply rail, providing multiple regulated outputs for microcontroller, sensor, and actuator power domains within an automotive ECU. According to the STMicroelectronics datasheet, the L9779WD integrates configurable power stages (CPS), a stepper motor driver with high-side and low-side outputs (OUT21 to OUT28), injector predriver stages, and watchdog functionality, making it a system-basis chip for gasoline and alternative-fuel powertrain ECUs. Background Knowledge: A Power Management IC (PMIC) for engine management is a highly integrated mixed-signal device that consolidates analog voltage regulation, power MOSFET predrivers, communication transceivers, and diagnostic logic into a single silicon die. The PMIC sits between the automotive battery/12V rail and the engine control unit's microcontroller, sensors, and actuators, providing clean, regulated voltages and protected high-current drive channels. In the broader system hierarchy, the L9779WDAT2 belongs to the automotive-power category: PMIC -> mixed-signal IC -> semiconductor. PMICs of this type are typically qualified to AEC-Q100 and operate across the -40C to +150C automotive grade-0 temperature range. Key features include SPI-configurable output mapping, integrated watchdog timer, over-current and thermal-shutdown protection on each driver stage, and configurable high-side/low-side predrivers capable of driving external N-channel MOSFETs for solenoid and injector loads. The HiQUAD-64 power package offers an exposed thermal pad for direct PCB heat dissipation, supporting the high continuous currents required in multi-channel fuel injection and idle-speed control applications. Architecture-wise, the L9779WDAT2 combines a central SPI-controlled register map with multiple independent analog and power blocks, including 5V and 3.3V linear regulators, charge-pump boost stage for high-side drivers, and gate-driver pre-stages with diagnostic feedback. The BCD6S technology permits high-voltage analog blocks (up to 40V tolerant load management), dense CMOS logic for SPI state machine, and DMOS power stages on a single monolithic die. Typical applications include gasoline direct-injection ECUs, electronic throttle control modules, idle-speed stepper motor control, transmission solenoids, and body-control modules requiring multi-channel driver integration. When designing with this part, engineers should follow ST's reference PCB layout for the HiQUAD-64 thermal pad and place sufficient bulk capacitance on the 5V main supply rail to absorb injector flyback energy. The integrated watchdog and SPI diagnostics significantly reduce firmware burden by handling reset supervision and fault reporting in hardware. This page synthesizes verified distributor pricing, AEC-Q100 automotive qualification details, drop-in same-package alternatives, and practical PCB layout guidance not consolidated in the manufacturer datasheet alone.
MC13892AJVK - PMIC for i.MX51/37/35/27, 4 Buck + 12 LDO | NXP
The NXP MC13892AJVK is a Power Management Integrated Circuit (PMIC) designed specifically for the NXP i.MX51, i.MX37, i.MX35, and i.MX27 application processor families. It integrates four buck (step-down) switching regulators and twelve low-dropout (LDO) linear regulators in a single 139-pin MAPBGA package (7x7 mm), providing all the supply rails required by a portable multimedia or navigation device. What is a PMIC? A Power Management Integrated Circuit (PMIC) is a highly integrated semiconductor device that consolidates multiple voltage regulators, battery management functions, and often user-interface features (LED drivers, keypad scanners, RTC, ADC channels) into a single chip. In the broader taxonomy, a PMIC sits below the power-management category and above discrete DC-DC converters and LDOs; it is the central power orchestrator of any battery-powered application-processor platform. By replacing dozens of discrete regulators, a PMIC reduces board area, simplifies power sequencing, and improves overall system efficiency. Key features of the MC13892AJVK include: four synchronous buck converters (SW1-SW4) capable of powering the application processor core, memory, and I/O rails; twelve general-purpose LDOs for auxiliary supplies; integrated battery management with charger, coulomb counter, and backup-battery switchover; a 10-bit ADC for system monitoring; multiple GPIO pins; and an SPI/I2C control interface for dynamic voltage scaling. The device supports dynamic voltage-frequency scaling (DVFS) by slewing buck output voltages under software control, which dramatically reduces processor power consumption in portable use cases. Typical applications include personal media players, GPS / navigation devices, portable industrial terminals, e-readers, and other handheld/mobile devices based on i.MX application processors. The wide input range (typically 2.7 V to 4.5 V from a single-cell Li-Ion cell) and the high integration level make the MC13892AJVK the default companion chip for legacy i.MX designs. When designing with this part, pay close attention to the inductor and capacitor selection for the buck converters, follow the recommended PCB layout in the datasheet, and use the NXP evaluation board layout as a starting point. Confirm power-up sequencing via the I2C/SPI control interface matches your processor's rail-requirements. This page synthesizes distributor pricing, pin-compatible PMIC alternatives from the same MAPBGA-139 footprint, and practical design notes not found on the manufacturer datasheet alone.
MC13892JVK - i.MX PMUIC, 4 Buck + 12 LDO PMIC | NXP
The NXP (formerly Freescale) MC13892JVK is a Power Management and User Interface IC (PMUIC) designed specifically for the i.MX51, i.MX37, i.MX35, and i.MX27 application processor families, integrating 4 buck switching regulators, 12 LDO regulators, a battery management system, and LED driver / user-interface logic in a single 139-ball PBGA package measuring 7x7 mm. The device targets portable media players, navigation devices, smart mobile handsets, and other handheld applications where tight PCB area, long battery life, and clean rail sequencing are mandatory. A Power Management IC (PMIC) is an integrated circuit that consolidates multiple voltage regulators (typically buck converters and LDOs) along with supervisory functions such as power sequencing, voltage monitoring, battery charging, and thermal protection into one package. The PMIC sits between a single-cell Li-Ion/Li-Poly battery or wall-adapter input and the dozens of power rails that an application processor subsystem requires, replacing what would otherwise be 15 to 25 discrete regulators and significantly reducing both board area and quiescent current. Key features of the MC13892JVK include four synchronous buck converters (typically configured at 1.05 A, 1.0 A, and dual lower-current rails), twelve low-dropout linear regulators ranging from 30 mA to 300 mA of output current, an integrated Li-Ion / Li-Poly battery charger with JEITA-compliant temperature sensing, a real-time clock supply, and a backlight LED driver capable of driving a string of series white LEDs. The chip also includes I2C control, programmable power-up / power-down sequencing, and hardware reset output to the host processor. Architecturally, the device combines NXP's Smart Power technology with a 0.13 um mixed-signal process to deliver high buck-converter efficiency (>90 % at typical loads) while maintaining the low-noise analog performance required by the audio CODEC and RF transceiver rails of an i.MX-based handheld design. The on-chip charge management supports pre-charge, fast-charge, and termination states, and includes a thermistor input for JEITA safety temperature windows. Typical applications include portable media players, personal navigation devices (PNDs), e-readers, smart industrial handhelds, wearable medical telemetry, and any battery-powered i.MX51/37/35/27 platform. The wide input voltage range (typically up to 6 V from USB / wall adapters) and the high level of integration make it a common reference design companion to the i.MX family. When designing with the MC13892JVK, engineers should pay close attention to the buck-switcher inductor and capacitor selection to meet ripple targets, lay out the PBGA thermal balls on multiple inner copper pours to keep junction temperature below 105 C, and follow NXP's reference manual for the exact power-up sequence to prevent latch-up of the i.MX processor core supply. This page synthesizes distributor availability, datasheet excerpts, and cross-reference alternatives to the MC13892JVK that are not consolidated in the manufacturer datasheet, providing a single triage point for engineers evaluating or sourcing this part.
MC32PF3000A4EP - i.MX7 PMIC, 4 Buck + 1 Boost + 6 LDO | NXP
The NXP Semiconductors MC32PF3000A4EP is a configurable Power Management Integrated Circuit (PMIC) targeting NXP i.MX7 and i.MX6 application processors, integrating 4 buck converters, 1 boost regulator, and 6 LDOs in a single 48-pin QFN (7x7 mm) package with exposed thermal pad. The PMIC is pre-programmed for i.MX7 application processor use and operates from a 2.8V to 5.5V supply input. A PMIC (Power Management Integrated Circuit) is a highly integrated device that consolidates multiple voltage rails, sequencing logic, and supervisory functions for a host processor. Positioned in the system power hierarchy, a PMIC sits between the battery or DC input and the application processor's internal voltage domains. The PF3000 specifically targets battery-powered and low-power applications, providing dynamic voltage scaling (DVS) controlled through an I2C interface to extend battery life on i.MX 6DualLite and i.MX 7-series single-core Cortex-A processors. Key features of the MC32PF3000A4EP include 4 buck converters, 6 LDOs, one boost regulator, an integrated Coulomb counter for battery fuel gauging, and I2C programmability for output voltage, sequencing, and fault behavior. The device supports software-controlled dynamic voltage scaling, allowing the host processor to lower its core voltage during periods of light load. Operating temperature range spans -40C to +85C industrial grade. Architecturally, the PF3000 uses a programmable state machine and OTP (one-time programmable) memory to set default rail voltages, sequence timing, and protection thresholds without external component overhead. Built-in supervisory functions include under-voltage, over-voltage, over-current, and thermal shutdown protection. A built-in watchdog timer and reset generator reduce the bill of materials for processor companion circuits. Typical applications include i.MX7 and i.MX 6DualLite portable handheld terminals, industrial HMI panels, wearables, portable medical devices, point-of-sale terminals, and low-power IoT edge gateways. The integrated fuel gauge and DVS capability make the part especially attractive for battery-powered designs where every milliamp matters. When designing with the MC32PF3000A4EP, follow the NXP reference design schematic closely and use the supplied OTP configuration to ensure proper i.MX7 boot sequencing. Note that the part ships as a consumer-grade variant; for AEC-Q100 automotive qualification, review the MC33PF3000A5ES or MC34PF3000A5EP variants from the same family. This page synthesizes NXP PF3000 family datasheet specifications, drop-in alternate parts verified against the same QFN-48 footprint, and a practical design notes set not aggregated in any single manufacturer document.
MC34903CP3EK - System Basis Chip PMIC, 32-SOIC-EP | NXP
The NXP MC34903CP3EK is a System Basis Chip (SBC) power management IC combining two 3.3 V/400 mA LDOs, a CAN 1 Mbps transceiver, LIN 2.0 interface, multiple wake-up inputs, and high-side switches in a 32-pin SOIC-EP package. It is engineered as an analog companion chip for microcontrollers in industrial and automotive body modules, integrating voltage regulation, bus communication, monitoring, and load control into a single IC. What is a System Basis Chip? An SBC is a mixed-signal power management IC that consolidates the discrete functions found around a microcontroller (DC rails, communication transceivers, watchdog, wake-up logic) onto one silicon die. SBCs sit above the linear regulator, switching regulator, and transceiver families in the power management hierarchy, providing a single regulated power tree and bus interface for the host MCU. The MC34903 belongs to NXP's 34903/4/5 second-generation SBC family, optimized for industrial sensor and actuator nodes. Key features include dual 3.3 V LDO outputs each rated at 400 mA, a CAN 1 Mbps physical layer compliant with ISO 11898, a LIN 2.0 slave interface, three wake-up inputs supporting cyclic and edge-triggered sensing, multiple high-side drivers, an SPI/SCI configuration interface, and integrated thermal shutdown. The 32-pin SOIC-EP package provides an exposed thermal pad for improved heat dissipation at the high-side driver loads. Operating input range is 6 V to 27 V (with 5.5 V to 40 V transient capability). The architecture pairs an internal charge pump to drive the high-side N-channel MOSFETs efficiently, while the CAN and LIN transceivers share a common analog supply rail generated from the main buck pre-regulator. This integration reduces BOM count by approximately 20-30 discrete components per node and improves EMI robustness by keeping bus transceivers co-located with their regulator bypass capacitors. Typical applications include industrial CAN nodes (sensor clusters, valve manifolds), body controllers and HVAC modules in automotive networks, building automation gateways, and LIN-actuated mirror/lighting modules. The wide input range and integrated bus interfaces make the MC34903 a fit for 12 V and 24 V industrial bus architectures. A key design consideration is that the MC34903 is part of NXP's mature industrial SBC portfolio and has been moved to End-of-Life per the manufacturer product page; designers should evaluate the recommended replacement and qualify a drop-in substitute before committing to new designs. This page synthesizes distributor pricing, datasheet sources, and pin-compatible alternatives drawn from the manufacturer cross-reference, going beyond the single-product focus found on standard distributor listings.
MC34905CS3EK - SBC with CAN/LIN, 2x 3.3V/400mA LDOs | NXP
The NXP MC34905CS3EK is a second-generation System Basis Chip (SBC) that integrates a high-speed CAN transceiver, a LIN 2.0 transceiver, two 3.3V/400mA low-dropout (LDO) regulators, and multiple wake-up sources into a single 32-pin SOIC-EP package. It is designed for automotive and industrial body-electronics modules where PCB area, quiescent current, and EMC compliance are critical. What is a System Basis Chip? An SBC is a power-management and communication IC category that sits between a microcontroller (MCU) and the vehicle bus (CAN/LIN). It combines voltage regulators, physical-layer transceivers, and supervisory functions into one device, allowing the MCU to be powered, woken up over the bus, and protected from transients in a smaller footprint than discrete implementations. SBCs sit in the hierarchy: SBC -> PMIC -> power management IC -> semiconductor. Key specifications include two 3.3V LDO outputs each rated at 400mA (one MCU rail, one sensor/peripheral rail), a 5.5V to 28V operating input range with load-dump survivability, 1Mbps CAN physical layer, and LIN 2.0 conformance. The device supports 3/4 selectable wake-up sources (CAN, LIN, timer, and dedicated pin), has an operating temperature range of -40C to +125C, and is qualified to AEC-Q100 for automotive applications. Architecturally, the MC34905CS3EK integrates an HS-CAN ISO 11898-5 transceiver with low-power modes, a LIN 2.0/2.1 transceiver, and dual tracking LDOs with internal MOSFETs. The integrated watchdog and reset generator allow direct connection to automotive MCUs such as the S08 and MPC56xx families. The exposed thermal pad on the SOIC-EP package provides a low theta_JA for sustained high-current regulator operation. Typical applications include automotive body controllers, HVAC modules, seat controllers, lighting modules, and industrial CAN/LIN nodes. The wide VIN tolerance makes the part well suited to 12V and 24V systems, with the 3.3V rails directly powering the host MCU and sensors. Designers should pay attention to layout: the exposed pad must be soldered to a sufficiently large copper island for thermal performance, and CAN/LIN bus traces should be kept short and routed with characteristic impedance control. A 100nF decoupling capacitor close to VCC and a reverse-polarity protection diode at VBAT are typical design practices.
MC34912G5ACR2 - LIN SBC PMIC, 2x 5V LDOs, DC Predriver | NXP
The NXP MC34912G5ACR2 is a Serial Peripheral Interface (SPI)-controlled System Basis Chip (SBC) for MCU-based automotive and industrial nodes, integrating a LIN 2.5 transceiver, two 5.0 V/200 mA LDOs, a 5.5 V-18 V DC motor predriver with current sense, four wake-up inputs, and enhanced EMC, all in a 32-pin LQFP (7x7 mm) package. The part on-board 5 V regulators deliver up to 200 mA each (referred to on some datasheet sheets as the 5.0V/6020mA notation that reflects pulsed/sense current capability), while VDD for the MCU is supplied through an independent switch-mode-friendly path. The predriver section drives low-side N-channel MOSFETs or relays for small brushed DC loads and supports programmable current-limit and PWM control. SPI registers configure VDDT threshold, watchdog window, LIN slope, and the analog multiplexer that routes battery, temperature, or pin voltages back to the MCU ADC. A System Basis Chip (SBC) is an automotive power-management IC that consolidates voltage regulation, physical-layer communication, and wake-up logic into one package, sitting between the battery/MCU and the rest of the ECU in the body-control hierarchy: SBC -> PMIC -> power management IC -> semiconductor. The MC34912 family targets LIN-slave nodes such as door modules, seat controllers, mirror adjusters, HVAC flaps, and lighting clusters where an external MCU plus discrete LIN transceiver and regulators would otherwise inflate BOM count and PCB area. Key features include 5.5 V-18 V (max 27 V transient) supply operation, LIN 2.0/2.1/2.2/J2602 compliant transceiver with integrated slope control, configurable cyclic-sense current down to sub-100 µA, two parallel 5 V regulators with selectable current limit, and an internal predriver capable of switching inductive loads with freewheeling protection. The analog MUX (AMUX) and internal bandgap let the host MCU measure battery voltage and chip temperature through a single ADC channel. Operating modes span Normal, Stop, Sleep, and Cyclic Sense for software-controlled power states with wake-up from LIN bus, wake pins, or CS timer. Typical applications include automotive door modules, seat controllers, smart mirror adjusters, HVAC damper motors, rear lighting nodes, and general LIN slave ECUs. The wide supply range also allows 12 V industrial sensor nodes that share the LIN bus with the rest of the system. The integrated EMC hardening (selectable LIN slew rate, controlled output edges, and load-dump tolerance) reduces external filter components and helps designs meet OEM conducted/radiated requirements. When designing with this SBC, place 100 nF/4.7 µF ceramics at VDDT/VBAT and keep the LIN pull-up and ESD network close to the LIN pin; respect the 27 V load-dump rating and derate junction temperature at high ambient. SPI programming of the watchdog window must be set before exiting Reset to avoid unintended MCU lockouts.
MCZ33742SEG - SBC with HS-CAN & 5V LDO | NXP Semiconductors
The NXP Semiconductors MCZ33742SEG is a System Basis Chip (SBC) with Enhanced High-Speed CAN Transceiver (SBC-E-HS-CAN) that integrates a 1.0 Mbps CAN 2.0 compliant transceiver, a SPI control interface (up to 4.0 MHz), and a fully protected 5.0 V low-dropout regulator with current limiting, overtemperature prewarning, and reset output. The device is supplied from a 5.5 V to 18 V (5.5 V–27 V tolerant) automotive bus rail and packages into a 28-pin wide-body SOIC with 42 mA typical quiescent supply. A System Basis Chip (SBC) is a power-management-plus-communication IC that consolidates the functions commonly surrounding a microcontroller in an automotive ECU: a voltage regulator, a CAN (Controller Area Network) or LIN physical transceiver, watchdog logic, and protective features. The SBC sits between the vehicle's 12 V battery bus and the MCU, providing a regulated logic rail and the physical layer for in-vehicle networking. As an automotive-grade mixed-signal IC, the MCZ33742SEG belongs to the power management IC (PMIC) and transceiver hybrid category used inside body, chassis, and powertrain ECUs. Key features include 1.0 Mbps CAN transceiver with bus diagnostic capability (TXD-dominant-timeout, bus-fault detection), SPI control at frequencies up to 4.0 MHz for configuration and diagnostics, and a fixed 5.0 V LDO with current limit, overtemperature prewarning, output voltage monitoring, and reset generation. The output drive stage includes a sense input for closed-loop regulation across a remote load. The device operates over -40 °C to +125 °C, qualifying it for under-the-hood ECU environments. Architecturally, the MCZ33742SEG combines a high-speed CAN physical layer (ISO 11898-5 compliant) with an LDO regulator, SPI-mapped control/status registers, and several fault-protection blocks (overtemperature, undervoltage, overcurrent, TXD dominant timeout). The high-side driver with sense feedback enables load-dump-tolerant supply of downstream 5 V microcontrollers and sensors while the CAN transceiver supports standard CAN 2.0A/B frames up to 1 Mbps on a bus-protected physical interface. Typical applications include automotive HVAC control units, body controllers, instrument cluster power and communication, ECU power and CAN interfacing, and industrial CAN-enabled sensor hubs. The integrated LDO plus CAN transceiver reduces external component count on space-limited modules. The diagnostic features (TXD dominant timeout, bus fault, overtemperature prewarning) simplify ASIL-ready firmware development under ISO 26262 processes. When designing with this device, decouple VCC and VDD pins with 100 nF ceramic capacitors placed within 2 mm of the IC pins and follow NXP application note SAB089 for high-speed CAN bus termination (120 Ω at each end, split termination recommended). Always respect the absolute maximum load-dump rating of 40 V on VBAT to avoid catastrophic regen silicon die failure.
MCZ33903C5EKR2 - SBC with CAN/LIN, 5V MCU Regulator | NXP
The NXP MCZ33903C5EKR2 is a second-generation System Basis Chip (SBC Gen2) integrating a high-speed CAN transceiver, a LIN interface, and a 5.0 V / 3.3 V selectable MCU voltage regulator in a 32-pin SOIC Wide EP package. It targets automotive and industrial networked nodes requiring a single-chip power-and-comms front end. A System Basis Chip is a power management IC that combines a voltage regulator, communication transceivers (CAN, LIN, FlexRay), and system-level protections into one package. It sits between the battery / 12 V bus and the microcontroller, simplifying BOM, reducing PCB area, and providing deterministic behavior under fault conditions such as load dump, reverse battery, and ground loss. The MCZ33903C5EKR2 includes a fully-protected embedded 5.0 V regulator for the CAN driver, voltage/current/temperature protection, extremely low quiescent current in Low-Power (LP) modes for sleep compliance, and part-number-selectable 5 V / 3.3 V MCU rail with the option of an external PNP transistor to extend current capability and share dissipation. The HS-CAN transceiver operates from 9 V / 12 V / 15 V / 18 V / 24 V bus rails with 20 kbps-class normal and sleep modes; the LIN interface complies with ISO 17987. Architecturally the device combines an LDO regulator core with CAN/LIN physical-layer transceivers, watchdog logic, SPI configuration, and reset generation, which together cut the MCU area of an automotive BCM or body controller. The exposed pad (EP) of the SOIC-32W lowers thermal resistance when the external PNP transistor is used for high-current MCU rails, which is critical for ECU thermal budgets. Typical applications include automotive body control modules (BCM), HVAC modules, instrument clusters, gateway ECUs, and industrial sensor actuators connected via CAN or LIN. The wide input range supports 12 V and 24 V battery systems used in trucks, off-highway vehicles, and industrial machines. When designing with this part, ensure the exposed pad is soldered to a continuous copper pour to meet thermal performance. The 5 V / 3.3 V output voltage is selected by part-number ordering options, not by external pins - verify the desired MCU rail voltage at ordering time. The low-quiescent LP modes must be sequenced correctly through SPI commands to avoid spurious CAN-bus wake events. This page synthesizes distributor pricing, drop-in alternatives, and engineering design notes not collected in the manufacturer datasheet, with parameters anchored to the FindIC and DigiKey listings as of 2026-10-15.
MCZ33903CP5EK - SBC Gen2 with Hi-Speed CAN, 32-SOIC EP | NXP
The NXP MCZ33903CP5EK is a second-generation System Basis Chip (SBC Gen2) integrating a 5V/3.3V-selectable voltage regulator for the host MCU, a high-speed CAN transceiver compliant with ISO 11898-2 and ISO 11898-5, an SPI-controlled companion interface, and comprehensive system protection, all housed in a 32-pin SOIC wide-body package with an exposed thermal pad. A System Basis Chip (SBC) is a category of multi-functional automotive IC that combines power management with one or more communication transceivers (CAN, LIN, FlexRay) into a single package. SBCs sit hierarchically below the host microcontroller on the vehicle network, acting as the power-and-protocol gateway between the MCU, sensors, and the in-vehicle bus. By collapsing what used to require three or four discrete ICs into one part, SBCs reduce PCB area, quiescent current, and BOM cost in automotive ECUs. Key features of the MCZ33903CP5EK include an integrated HS-CAN transceiver supporting 20 kbps bus speeds in Normal and Sleep modes, a 5V/3.3V LDO with the option of an external PNP transistor to extend current capability and share dissipation, voltage/current/temperature protection, and extremely low quiescent current in low-power modes for battery-friendly standby. The chip also exposes two 5V/400 mA protected supplies (V1 and V2) for sensors or peripherals, and full local/bus failure diagnostics for the CAN network. Architecturally, the device pairs a fully-protected embedded 5V voltage regulator with an independent ISO 11898-compliant CAN physical layer. The exposed pad on the SOIC-32 WP package enables higher dissipation than the standard SOIC-32, which is critical because the device drives both itself and external loads. Built-in window watchdog and SPI diagnostics give the host MCU visibility into faults from the supply rail all the way to the bus pins, helping automotive platforms meet ISO 26262 functional-safety goals. Typical applications include automotive body controllers, gateway ECUs, instrument clusters, infotainment head units with CAN connectivity, chassis modules, and HVAC control units. The wide 9V to 27V (and tolerant up to 40V) input range makes it drop-in ready for 12V and 24V vehicle battery rails, and the AEC-Q100 qualification (Automotive temperature grade) suits it for under-hood and cabin environments across passenger and commercial vehicles. When designing with the MCZ33903CP5EK, always solder the exposed thermal pad to a properly sized copper pour; the chip drives two 400 mA rails so dissipation can be significant. Decouple VBAT, V1, V2, and VDD with the capacitor values recommended in the manufacturer datasheet, and provide a clean chassis ground for the CAN shield. This page synthesizes NXP datasheet data, distributor stock signals, drop-in alternatives, and application-specific design notes not found on a single distributor product page.
SC900844JVK - 14-LDO PMIC for Ultra-Mobile Apps | NXP
The NXP SC900844JVK is a highly integrated power management IC (PMIC) designed for ultra-mobile and embedded applications. Housed in a 338-ball MAP-BGA package measuring 11x11 mm, this PMUIC integrates 5 switching regulators, 14 LDOs, 10 buck converters, and an ADC for comprehensive multi-rail power management in space-constrained designs. A power management IC (PMIC) is a single-chip semiconductor device that consolidates multiple voltage regulators, supervision functions, and often battery management onto one die to power complex SoCs, processors, and peripheral subsystems. PMICs sit within the broader power management hierarchy between discrete voltage regulators and full system-on-chip power domains, offering engineers a single point of control for sequencing, voltage scaling, fault protection, and efficiency optimization. By replacing dozens of discrete regulators, PMICs reduce PCB footprint, quiescent losses, and design complexity in battery-powered products. Key features of the SC900844JVK include an input voltage range of 3V to 4.4V optimized for single-cell Li-ion battery operation, an industrial temperature grade suitable for consumer and embedded environments, and surface-mount compatibility for high-volume reflow assembly. The device integrates ADC monitoring rails for telemetry of current versus voltage across all output domains, enabling dynamic power-state coordination with the host processor. The architecture follows a digital PMU (PMUIC) topology where switching converters handle high-current core rails at high efficiency, while LDOs provide clean low-noise outputs for analog and RF subsystems. The integrated ADC channel allows software-driven load-line calibration and dynamic voltage scaling, critical for ultra-mobile devices where battery life and thermal envelope are primary constraints. Typical applications include tablet power trees, ultra-mobile PC platforms, embedded single-board computers, smartphone companion PMICs, and industrial handheld terminals. The wide feature integration makes the SC900844JVK particularly attractive for low-power SoC designs requiring sequenced multi-rail power. Designers should note that the 338-ball MAP-BGA package requires multi-layer PCB with via-in-pad and laser-drilled microvia technology; standard 4-layer FR-4 stackups are typically adequate for the 11x11 mm footprint. Decoupling capacitor placement must follow the reference layout in the manufacturer datasheet exactly to maintain switching regulator stability.
SI3402-B-GMR - 802.3af/at PoE+ PD Controller + DC-DC, 20-QFN | Skyworks
The Skyworks Solutions SI3402-B-GMR is a fully-integrated IEEE 802.3-compliant Power-over-Ethernet Powered Device (PoE PD) controller with an on-chip PWM switching regulator and hot-swap FET, delivered in a 20-pin 5x5 mm QFN package. According to the manufacturer datasheet, the device operates from a 37 V to 57 V input rail (typical PoE 48 V), delivers up to 13 W of output power, and supports Class 0-3 signatures with automatic two-step inrush current limiting for compatibility with legacy pre-standard PSE equipment. The integrated switching regulator eliminates the need for an external FET or Schottky bridge, collapsing the PoE front end and DC-DC converter into a single 5x5 mm footprint. A PoE PD controller is a specialized PMIC that negotiates IEEE 802.3af/at classification with the Power Sourcing Equipment (PSE), controls the hot-swap turn-on sequence with controlled inrush, and then converts the 48 V Ethernet line voltage into one or more usable system rails (commonly 5 V, 12 V, or 3.3 V). Within the broader taxonomy, the SI3402-B sits in the PMIC family of power management ICs, more specifically the Power-over-Ethernet controller sub-category, which in turn belongs to the industrial Ethernet and IP-phone/IoT power-supply hierarchy. Compared with a discrete hot-swap + buck-converter implementation, the SI3402-B reduces BOM count, lowers PCB area, and provides a single silicon reference design that has been pre-qualified for radiated EMI. Key differentiating features include 100 V absolute-maximum transient survivability on the line side, an internal 0.5 ohm hot-swap switch, an integrated low-EMI switching regulator with synchronous rectifier, and a dedicated maintain-power-signature (MPS) current source. The device implements the full 802.3-2012 Type 1 detection, classification, and operating-mode state machine, and supports both isolated and non-isolated flyback or buck topologies. A thermal-shutdown block and undervoltage lockout complete the protection suite, allowing the IC to be safely deployed on heat-constrained PoE load boards without external supervisory circuitry. The architecture combines an analog current-mode PWM controller, a 100 V-rated internal hot-swap FET, and a 0.6 A internal switching element, with a precision bandgap-derived reference for the classification signature. The low-EMI gate-drive scheme limits dV/dt on the switching node, allowing designers to meet EN 55022 / FCC Part 15 Class B without complex shielding. Because the switching FET and hot-swap FET are integrated, case-temperature rise is dominated by output power and PCB copper area, making thermal layout the single most critical design variable. Typical applications include IP phones, wireless access points, PoE-powered security cameras, IoT gateways, and industrial sensors that harvest power from a structured Ethernet cable. Each application benefits from the integrated topology: dropping the part count, shrinking the board, and removing the design risk of a discrete 100 V hot-swap design. The wide input range also supports non-standard 50 V and 54 V rail systems. When designing with this device, allocate at least 1 square inch of inner-layer copper to dissipate Class-3 full-load power, and follow Skyworks application note AN956 (Using the Si3402-B in Isolated and Non-Isolated Designs) for the recommended transformer, snubber, and feedback component selections. Designers transitioning from the obsolete SI3402-A can reuse the same PCB layout, with only modest resistor and capacitor value changes per the cross-reference guide. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a typical distributor product listing, and cross-references the part against the published Skyworks datasheet.
TLE9461ESV33XUMA1 - OPTIREG Lite SBC, CAN FD, 5V/3.3V LDO | Infineon
The Infineon TLE9461ESV33XUMA1 is a monolithic System Basis Chip (SBC) from the OPTIREG Lite family, integrating a 5 V / 3.3 V low-dropout regulator, a CAN FD transceiver capable of 5 Mbps, a watchdog, and low-power modes in a single PG-TSDSO-24-1 exposed-pad power package. It is purpose-built for various CAN automotive applications where board space, quiescent current, and functional safety are all critical, including body controllers, gateways, and zonal ECUs. What is a System Basis Chip? An SBC is a multi-functional power and communication IC that consolidates the functions previously served by separate components: a voltage regulator, a bus transceiver (such as CAN, LIN, or FlexRay), reset generation, watchdog supervision, and sometimes wake-up logic. SBCs sit between the vehicle battery and the microcontroller in the system hierarchy: SBC -> power management IC -> automotive semiconductor. By merging these functions into one die, an SBC reduces PCB area, lowers quiescent current, and simplifies ASIL functional-safety design by providing a single, characterized supply source for the MCU. Key features include a 5 V LDO delivering up to 250 mA for the host microcontroller, a separate 3.3 V LDO rail, hardware and software watchdog modes, a CAN FD transceiver meeting ISO 11898-1, under-voltage and over-voltage detection, and thermal shutdown. The exposed pad (EP) of the PG-TSDSO-24-1 package gives a low thermal resistance to the PCB, allowing the device to drive 250 mA continuously without a heatsink in typical ambient conditions. The architecture uses a high-side DMOS power switch for the 5 V LDO, a low-quiescent linear regulator for the 3.3 V rail, and a differential CAN transceiver compliant with ISO 11898-2. The CAN FD interface supports bit rates up to 5 Mbps in the data phase, while the integrated slope control minimizes EMI on the bus. Typical applications include automotive body control modules, CAN gateway ECUs, HVAC controllers, seat and lighting modules, and BCM power management. It is well suited as a supply-and-transceiver companion to Infineon AURIX and other 5 V microcontrollers used in CAN networks. When designing with this device, ensure the exposed pad has sufficient copper pour (typically 1 cm x 1 cm on outer layers) and that the bus termination is 120 Ω at the cable ends. Use Infineon’s configuration tool to set watchdog timing, fail-safe behavior, and wake sources before firmware bring-up. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the Infineon datasheet, giving automotive engineers a single point of comparison for OPTIREG Lite SBC selection.
TLE9461ESXUMA1 - OPTIREG Lite SBC, 5V LDO + CAN FD | Infineon
The Infineon TLE9461ESXUMA1 is an OPTIREG Lite System Basis Chip (SBC) integrating a 5 V microcontroller supply LDO with a CAN FD transceiver and a watchdog, housed in a 24-pin PG-TSDSO-24-1 exposed-pad power package. Designed for automotive CAN applications, the TLE9461ES provides a regulated 5 V/250 mA LDO rail, a CAN FD transceiver compliant with ISO 11898-1, and a window watchdog for microcontroller supervision. A System Basis Chip (SBC) is a multi-functional power and communication IC that combines on a single die the voltage regulators, communication transceivers, and supervision features that an automotive Electronic Control Unit (ECU) needs to interface with a microcontroller and the vehicle bus. SBCs sit at the intersection of power management ICs and interface ICs in the automotive semiconductor hierarchy, and the OPTIREG family is Infineon's automotive-grade SBC line. Key features include an integrated CAN FD transceiver supporting data rates up to 5 Mbit/s, a window watchdog with multiple time-out windows, a TEST pin for SBC development mode, and software compatibility with the broader TLE926x and TLE927x SBC families. The device also offers overtemperature and short-circuit protection, a wide input voltage range suitable for 12 V automotive rails, and an exposed thermal pad that enables sustained operation at elevated ambient temperatures. The TLE9461ES uses a monolithic BiCMOS power process, integrating the LDO pass element, the CAN transceiver line driver/receiver, and the watchdog timer on a single die. The exposed pad on the bottom of the PG-TSDSO-24-1 package provides a low-thermal-resistance path to the PCB copper pour, which is essential for the 250 mA continuous LDO load and the transient CAN bus events. Typical applications include automotive body controllers, HVAC modules, seat and mirror controllers, lighting ECUs, gateway modules, and CAN node peripherals that need a compact single-chip 5 V supply plus CAN interface. The wide input range also enables 12 V and 24 V truck-bus compatibility. When designing with the TLE9461ES, ensure the exposed pad is soldered to a copper pour of at least 1 square centimeter to keep junction temperature within AEC-Q100 Grade 1 limits. Use Infineon's recommended 100 nF + 4.7 µF input capacitor network and place the CAN bus termination as close to the CANH/CANL pins as possible to meet IEC 62228-4 EMC requirements. This page synthesizes distributor stock, real-time pricing, pin-compatible SBC alternatives, and EMC layout guidance beyond the manufacturer datasheet.