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MC34903CS5EK - SBC, LIN, 2x 5V/400mA LDO, 32-SOIC-EP | NXP
The NXP MC34903CS5EK is a second-generation System Basis Chip (SBC) for industrial MCU modules that integrates two 5.0 V/400 mA low-dropout (LDO) regulators, a LIN 2.1 interface, a high-speed CAN transceiver, and 2/3 wakeup input capability into a single 32-pin SOIC-EP (exposed-pad) package. The part was originally launched by Freescale Semiconductor and is now part of the NXP portfolio after the 2015 acquisition. Per the NXP product page, MC34903CS5EK has reached End of Life and is being phased out, with PCN replacement guidance published by Rochester Electronics and NXP. A System Basis Chip (SBC) is a mixed-signal analog companion IC for a microcontroller that consolidates power, communication, and supervisory functions onto one die. The taxonomy: SBC -> analog companion IC -> power management + transceiver IC -> mixed-signal semiconductor. By co-integrating 5 V LDOs, CAN, and LIN, the SBC eliminates discrete power and interface circuitry, reduces BOM count, and provides unified fault handling through one SPI-controlled status register. Key features of the MC34903CS5EK include two independent 5.0 V ±2% tracking LDOs delivering up to 400 mA each, a LIN 2.1 physical layer compliant with ISO 9141, a high-speed CAN physical layer compliant with ISO 11898, and configurable 2/3 wakeup pins for low-power sleep/standby modes. The IC supports wide battery supply input from 5.5 V to 28 V (load-dump tolerant in automotive bus variants), low standby current, and an SPI bus for diagnostics and configuration. The MC34903CS5EK is targeted at industrial CAN/LIN nodes, building automation, HVAC controllers, sensor nodes, and industrial sensor-actuator modules. The wide VIN range directly supports 12 V and 24 V industrial backplanes without additional pre-regulation. End-of-life status makes this part suitable for legacy designs only; new designs should use the recommended NXP replacement (see selection_guide). When designing with the MC34903CS5EK, ensure the exposed pad is soldered to a sufficient copper area (>= 1 square inch) on inner or top PCB layers to meet the 32-SOIC-EP thermal budget. The LIN/CAN bus pins require external protection (TVS + common-mode choke) per IEC 61000-4-2 for industrial EMC compliance. This page synthesizes distributor inventory, EOL replacement guidance, and parametric drop-in alternatives - information not bundled in the original manufacturer datasheet.
MCP1321T-20LI/OT - 2.0V Supervisor w/ WDI, SOT-23-5 | Microchip
The Microchip Technology MCP1321T-20LI/OT is a voltage supervisory circuit with a 2.0V precision monitoring trip point, packaged in a 5-pin SOT-23 (OT) surface-mount package on tape-and-reel. It combines an active-low open-drain reset output with an active-high push-pull reset output, a watchdog timer input (WDI), and a programmable reset delay, providing a single-chip brown-out / WDT solution for microcontrollers. The device is part of Microchip's MCP1321 family, which offers trip points from 2.0V to 4.7V in 100 mV increments. What is a voltage supervisor? A voltage supervisor (also called a reset IC, voltage monitor, or microprocessor supervisory circuit) is a power-management IC that monitors a system's supply rail and asserts a reset signal whenever the rail drops below a precise threshold. Supervisors sit between the power supply and the microcontroller's reset pin, complementing internal POR/BOD circuitry with higher accuracy (typically ±1-2%) and additional features such as watchdog timers, manual reset inputs, and complementary reset outputs. They belong to the broader category of power-management ICs and are essential whenever deterministic power-up / power-down behavior is required. Key features of the MCP1321T-20LI/OT include: low supply current (microchip product page lists low-Iq operation), precision 2.0V ±1.5% (typical) trip point, watchdog input time-out of 1600 ms (L-option), reset delay of 200 ms (I-option), and complementary reset outputs. The open-drain /RESET line allows wired-OR connection with other supervisors or push-button reset circuits, while the active-high push-pull RESET drives a standard logic input directly without an external pull-up. Technically, the device integrates a precision bandgap reference, a comparator, a counter for the watchdog timer, and an internal pull-up on /RESET. The WDI input must be toggled by the host MCU within the watchdog window; failure to do so asserts the reset outputs. Reset delay and WDI time-out are decoded from the device suffix (LI = 1600 ms WDI / 200 ms reset). Typical applications include MCU brown-out protection in 3.3V and 5V systems, watchdog supervision of battery-powered sensors, embedded industrial controllers, IoT edge nodes, and any system requiring deterministic power-on reset behavior. Design consideration: the open-drain /RESET pin requires an external pull-up resistor to VDD, while the active-high RESET does not. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes that are not found in the manufacturer datasheet alone.
MCZ33689DEW - System Basis Chip with LIN Transceiver | NXP
The NXP MCZ33689DEW is a SPI-controlled System Basis Chip (SBC) that integrates multiple frequently used functions for MCU-based systems plus a Local Interconnect Network (LIN) transceiver, all in a 32-pin SOIC package. It combines a 5V/3.3V linear regulator, multiple watchdog topologies, a LIN 2.1/2.0/1.3 physical layer transceiver, and SPI-configurable housekeeping functions into a single IC, reducing discrete BOM count in automotive body electronics modules. A System Basis Chip (SBC) is a power-management + communication hybrid IC designed for automotive body and convenience domains. It sits between the battery (typically 6V-18V in 12V systems, with load-dump transients up to 40V) and a host MCU, providing a regulated logic rail, robust in-vehicle network connectivity, and supervisory functions such as watchdog, reset generation, and fault detection. MCZ33689DEW belongs to the SBC family hierarchy: SBC > power-management IC > PMIC > automotive IC > semiconductor. Key features include a 5V/3.3V selectable LDO regulator delivering up to 200 mA for MCU and sensor supply, an integrated LIN 2.1-compliant transceiver with up to 20 kbit/s data rate, configurable window or timeout watchdog, low quiescent current in standby mode, and protection against load-dump, reverse battery, and overtemperature. The SPI interface allows the host MCU to adjust regulator voltage, watchdog timing, and LIN mode at runtime. The 32-pin SOIC package supports gull-wing mounting for robust automotive manufacturing. The device uses a mixed-signal BiCMOS process with onboard charge pump to drive the LIN bus dominant state, eliminating external pull-up components. Its internal voltage reference and low-drop architecture deliver stable MCU rail even during cranking pulses (as low as 5V on a 12V battery). An integrated LIN slope control reduces EMI emissions to meet automotive EMC standards. Typical applications include body control modules, door/window/seat control units, HVAC climate nodes, steering wheel switch interfaces, and lighting controllers. Any 12V automotive node with LIN-commissioned sensors and a host MCU benefits from this SBC integration. When designing with MCZ33689DEW, follow NXP application notes on LIN bus termination and load-dump protection. Add a reverse-battery protection diode or P-MOSFET at VBAT, decouple the LIN pin per SAE J2602, and verify thermal performance under sustained fault conditions. Watchdog topology selection (window vs timeout) must match the host MCU's response timing. This page synthesizes distributor pricing, drop-in-compatible alternatives, and application guidance not aggregated in a single manufacturer document, helping hardware engineers shorten the design-in cycle for 12V LIN body-electronics modules.
MCZ33811EGR2 - 5-Ch Solenoid Monitor IC, SPI, 16-SOIC | NXP
The NXP MCZ33811EGR2 is a 5-channel solenoid monitor integrated circuit that verifies proper electrical and mechanical solenoid operation in automotive electronic control units. Housed in a 16-pin SOIC wide-body (0.295 inch / 7.50 mm) package supplied on tape and reel, the device operates from a 7 V to 17 V supply rail with a typical quiescent supply current of 1 mA across the automotive -40 °C to +125 °C temperature range. Each of the five channels integrates a solenoid driver voltage monitoring stage that compares the switched battery rail against an internal reference and reports the result back to the host microcontroller over an SPI-compatible serial peripheral interface used for fault communication and threshold setup. A solenoid monitor IC is a specialized power-management and supervisory block that sits alongside the low-side solenoid drivers in a transmission, engine, or body controller and continuously checks that each inductive load is being driven correctly. It belongs to the broader hierarchy of supervisory / monitoring ICs -> power-management ICs -> mixed-signal automotive semiconductors. The MCZ33811EGR2's job is to detect open-load, short-to-battery, short-to-ground and over-current conditions on five independent solenoid outputs without disturbing the actuation path itself, which is why its supply current is held to roughly 1 mA even with all five channels active. Key features include five independent solenoid monitoring channels, an SPI interface for diagnostics and programmable thresholds, integrated fault latching and reporting, an automotive temperature grade rated for under-hood environments, and the wide-body 16-SOIC footprint that is shared across NXP's 33xxx analog companion family. The architecture uses five analog comparators with a precision bandgap-derived threshold, a digital SPI slave, and on-chip fault registers that flag each channel independently so the host MCU only needs to poll one register per channel rather than five separate status lines. Typical applications include automatic transmission solenoid monitoring, engine management solenoid banks, electronic stability control hydraulic valves, body controller load monitoring, and any 12 V automotive subsystem where a microcontroller must verify that five solenoids are being actuated reliably and detect wiring faults before they propagate into drivability or emissions problems. When designing with the MCZ33811EGR2, place 100 nF bypass capacitors on the VBAT supply pin as close to the package as possible and keep the SPI traces short and ground-referenced to preserve noise margin in the harsh automotive environment. The SPI MOSI, MISO, SCLK and CS pins require 4.7 kΩ pull-ups on the open-drain MISO line per the NXP application circuit. This page synthesizes distributor pricing, drop-in alternatives and practical design notes that are not found in the manufacturer datasheet alone, including a comparison of the MCZ33811EGR2 against the MCZ33996EK, MCZ33903DS3EK and other members of NXP's analog companion family.
MIC2776N-YM5-TR - Adjustable Voltage Supervisor SOT-23-5 | Microchip
The Microchip MIC2776N-YM5-TR is a micropower adjustable voltage supervisor with a 0.3V internal reference threshold, manual reset input, and an active-low open-drain reset output, housed in a 5-pin SOT-23-5 package. It monitors a single supply rail and generates a power-on reset signal for microcontrollers and microprocessors. A voltage supervisor (also called a reset generator or supervisory circuit) is a power management IC that watches a supply rail and asserts a reset signal whenever the voltage falls below a defined trip point. Within the component hierarchy, the MIC2776 sits in the power management IC family alongside voltage regulators and battery monitors, serving as the first line of defense against brown-out conditions that could corrupt microcontroller memory or cause uncontrolled I/O states. Key features include the adjustable under-voltage detector built around a precision 300 mV reference: an external resistor divider sets the trip point to any rail voltage above 0.3V, making the device suitable for monitoring 1.8V, 2.5V, 3.3V, and 5V systems. The manual reset (MR) input allows a push-button or host processor to force a reset, and hysteresis on the comparator prevents chatter near the threshold. The reset timeout is at least 140 ms, set by an external capacitor on the delay pin, ensuring processors have adequate stabilization time before code execution begins. Internally, the MIC2776 combines a bandgap reference, a micropower comparator, a delay generator, and an open-drain output stage. The open-drain output can be pulled up to any voltage rail, permitting level translation between the monitored rail and the target processor's reset input - a key advantage when supervising a 1.8V core from a 3.3V domain. Quiescent current is in the microampere class, so the device adds negligible load to battery-powered rails. Typical applications include reset generation for 8-bit and 32-bit microcontrollers (such as the Motorola 68HC11 family cited in the Microchip datasheet), battery-powered portable instruments, industrial control nodes, and set-top or consumer electronics requiring a reliable brown-out guard. Design consideration: because the trip point is set by an external divider, use 1% or better tolerance resistors and account for the internal hysteresis when calculating the release threshold, so noise near the comparator trip region does not cause repeated resets. This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing tiers, pin-compatible drop-in alternatives, comparison tables, and practical design notes in one place. Pricing shown as of 2026-10-16.
MIC803-46D2VM3-TR - 4.63V Processor Supervisor | Microchip
The Microchip Technology MIC803-46D2VM3-TR is a single-voltage microprocessor supervisor with a 4.63 V reset threshold, 20 ms reset delay, and open-drain reset output in a 3-pin SOT-23 package. It monitors a 1.2 V to 5.5 V supply and provides accurate power-fail detection for microprocessor, microcontroller, and embedded systems. A voltage supervisor, also called a supervisory circuit or reset controller, belongs to the power-management IC hierarchy. It monitors a system supply and signals the digital controller when voltage crosses a programmed threshold. This prevents a processor from operating below its valid input range, which can cause unreliable execution, corrupted memory, or unpredictable peripheral behavior. The key MIC803-46D2VM3-TR features include a 4.63 V nominal reset threshold, ±2.5% threshold tolerance, open-drain active-low reset output, and a 20 ms reset delay. Its three-terminal implementation keeps the circuit compact and suitable for space-constrained embedded equipment. The open-drain output allows the reset node to be pulled up to the local logic supply and permits wired connection with other supervisor signals. This variant belongs to the MIC803 family, whose part-number encoding identifies different reset thresholds and timing options. The D2 designation is associated with the 20 ms reset delay, while 46 identifies the 4.63 V threshold. Exact accuracy, hysteresis, current consumption, and temperature limits should be confirmed in the Microchip MIC803 datasheet before production release. Typical uses include monitoring 5 V processor rails, industrial controllers, battery-powered instruments, automotive electronics, IoT equipment, and consumer products. Place the device near the protected supply or logic rail and route the reset trace away from high-current switching nodes. A pull-up resistor is required on the open-drain reset output, and its value should balance rise time, power consumption, and downstream reset-input capacitance. The primary design trade-off is fixed threshold selection versus adjustable monitoring. This part offers a simple, low-component-count solution for systems with a known rail voltage. For rails requiring programmable thresholds, wider tolerance, different delay, or active-high reset behavior, select a matching supervisor after checking polarity, timing, package pins, and maximum supply voltage. This page consolidates verified manufacturer and distributor information, identifies family-level replacement risks, and highlights the pull-up, layout, and threshold considerations that are not apparent from a distributor title alone. Datasheet links are provided for complete electrical characteristics and ordering details.
MPQ6411GS-33-AEC1-Z - 3.3V Windowed Watchdog Timer AEC-Q100 | MPS
The Monolithic Power Systems MPQ6411GS-33-AEC1-Z is a fixed 3.3V automotive-grade windowed watchdog timer in an 8-pin SOIC package with a fixed threshold of approximately 3V (typ. 3.3V system monitor) and a single monitoring channel. It is qualified to AEC-Q100 and designed to monitor microcontroller activity by detecting trigger pulses within a defined time window. According to the MPS datasheet, the MPQ6411 family offers a single-channel supervisor topology and uses a fixed voltage detection threshold to assert a low-active reset output. A windowed watchdog timer is a type of processor supervisor that requires the host microcontroller to send a periodic trigger pulse within both a minimum and a maximum time window. This is in contrast to a simple watchdog timer that only enforces a maximum interval. The MPQ6411 belongs to the power management -> voltage supervisor (PMIC supervisor) sub-category, which sits hierarchically under supervisory circuits, reset ICs, and processor supervisors. Compared to a simple voltage reset IC (POR), a windowed watchdog can also detect premature triggers, fault-locked MCUs, and code execution that is too fast. Key features of the MPQ6411GS-33-AEC1-Z include AEC-Q100 grade-1 qualification for automotive use, a fixed 3.3V monitoring threshold, active-low reset output, open-drain or push-pull reset signaling, and a wide operating temperature range of -40C to +125C (TJ). The 8-SOIC package is a JEDEC-standard surface-mount outline (3.90 mm body width) that is compatible with high-volume automotive PCB assembly lines. The AEC1 suffix denotes the automotive grade; the GS suffix denotes the 8-SOIC package and reel orientation; the -33 suffix denotes the 3.3V threshold variant. The MPQ6411 windowed watchdog architecture uses an internal oscillator to define the upper and lower window boundaries. The host MCU must toggle the WDI pin within this window; a missing trigger asserts reset, and a trigger arriving too early also asserts reset. This dual check protects against both hung firmware and runaway fast code loops. The internal reference and comparator are trimmed at factory to deliver a stable threshold across automotive temperature extremes. Typical applications include automotive ECU watchdog supervision, body and chassis controller monitoring, ADAS sensor MCU supervision, industrial PLC safety monitoring, and any mission-critical MCU system requiring detection of both code stall and code runaway. The -33 threshold version is selected when the MCU and logic rail operate at 3.3V nominal. When designing with the MPQ6411, choose the watchdog window time to be wider than the longest legitimate MCU loop period and narrower than the application safety reaction time. Tie RESET to the MCU NRST input and ensure the WDI edge is on a regular GPIO, not a peripheral pin that may be reconfigured at runtime. This page synthesizes verified distributor inventory, AEC-Q100 compliance notes, drop-in same-brand alternatives, and practical watchdog-window design guidance not consolidated in the MPS datasheet alone.
MPQ6411GS-AEC1-Z - Automotive Windowed Watchdog Timer, AEC-Q100 | MPS
The Monolithic Power Systems (MPS) MPQ6411GS-AEC1-Z is an AEC-Q100 qualified windowed watchdog timer IC housed in an 8-pin SOIC package, designed to monitor microcontroller activity and generate a reset signal when the MCU trigger pulse falls outside a defined timing window. It integrates a 1-channel supervisor architecture with open-drain reset output, operating from a wide supply range with low quiescent current, and is targeted at automotive electronic control units where functional safety (ISO 26262) and AEC-Q100 Grade 1 qualification are mandatory. The Z suffix denotes tape-and-reel packaging for high-volume automotive production lines. What is a Windowed Watchdog Timer? A windowed watchdog timer is a supervisory circuit that requires the host MCU to issue a periodic trigger pulse within a precisely defined upper-bound and lower-bound time window. If the trigger arrives too early, too late, or is missing entirely, the supervisor asserts a reset signal to the MCU. Compared to a simple watchdog (which only checks for missing triggers), a windowed watchdog also catches code-execution faults that would cause premature triggers - making it a cornerstone of ASIL-rated automotive firmware architectures. Key features include a programmable watchdog timeout window, a fixed reset pulse width, an open-drain RESET output (active low), and an integrated mode selector (MODE pin) that toggles between windowed watchdog and standard watchdog behavior. The device operates across the full automotive -40C to +125C junction temperature range, draws minimal quiescent current (low-uA range) to preserve battery life in always-on subsystems, and provides power-on reset functionality during VCC ramp-up. The 8-pin SOIC (narrow body) footprint simplifies PCB layout and supports hand-rework for prototype builds. The MPQ6411 uses a precision internal oscillator that defines the watchdog timing window with tight accuracy across temperature, removing the need for an external timing component. Communication with the MCU is via a single bidirectional WDI (watchdog input) pin and the RESET output pin, allowing firmware developers to implement a fail-safe heartbeat with minimal GPIO overhead. The MODE pin provides flexibility for OEMs that prefer a non-windowed standard watchdog in legacy firmware branches. Typical applications include automotive body control modules, powertrain ECUs, chassis domain controllers, battery management system (BMS) main controllers, and ADAS sensor hubs. It is also used in industrial PLCs and railway signaling controllers where IEC 61508 SIL-rated supervision is required. The combination of AEC-Q100 Grade 1 qualification and a wide operating voltage makes the MPQ6411 a fit for 12V automotive bus systems. When designing with the MPQ6411, place a 0.1 uF decoupling capacitor as close as possible to the VCC pin and keep the WDI trace short to avoid coupling noise that could be misinterpreted as a spurious trigger. Configure the WDI window in firmware to be at least 2x the worst-case MCU loop execution time to prevent false resets during transient processing peaks.
MPQ6411GS-Z - Windowed Watchdog Timer SOIC-8 | Monolithic Power Systems
The Monolithic Power Systems MPQ6411GS-Z is a windowed watchdog timer supervisor in an 8-pin SOIC package that monitors microcontroller activity and issues a reset signal when trigger pulses arrive outside a programmable time window. It delivers single-channel supervision with a reset output that drives low during power-up, under-voltage events, or when the MCU fails to service the watchdog in time, and operates from a wide supply range that supports 3.3V and 5V rails common in automotive ECUs, industrial controllers, and safety-critical embedded systems. The MPQ6411GS-Z is the standard-grade (non-automotive) variant of the MPQ6411 family; the -AEC1-Z suffix denotes the AEC-Q100 qualified version. A watchdog timer is a dedicated supervisor IC that resets a microcontroller when the firmware becomes unresponsive. The windowed variant goes beyond a simple timeout by requiring a service pulse within an upper-bound window, catching both "stuck-too-long" and "stuck-too-fast" (runaway) firmware faults, which is essential for functional-safety designs targeting ISO 26262 or IEC 61508. The MPQ6411 is a member of the broader supervisory / power-management hierarchy: supervisor -> voltage monitor -> PMIC -> semiconductor. Key features include programmable watchdog window timing set by an external capacitor on the WDT pin, an open-drain active-low reset output, a MODE pin that selects between long-window and short-window watchdog behavior, internal pull-up on WDI, and a low quiescent current suitable for always-on monitoring. The SOIC-8 (G suffix) package offers standard surface-mount handling with a thermal resistance suitable for the device's low dissipation profile. Internally, the MPQ6411 combines a precision internal reference, an oscillator-based timing core, and a window-comparator logic block. The WDT capacitor charges and discharges through a controlled current source, generating a triangular waveform whose upper and lower thresholds define the service window. Reset is asserted only when the WDI trigger falls outside that window, providing deterministic fault detection. Typical applications include automotive ECU supervision, ADAS sensor processors, industrial PLC safety monitors, battery management system (BMS) MCUs, and any safety-critical embedded design where firmware lockups must be caught within a deterministic time bound. The wide operating temperature range further supports under-hood and outdoor industrial deployments. When designing with this device, place the WDT timing capacitor close to the WDT pin and follow MPS application-note guidance on PCB layout for noise immunity. Verify that the chosen window period is shorter than the maximum fault-tolerant latency required by the system safety analysis. This page synthesizes MPQ6411 family datasheet parameters, same-brand MPQ6411 drop-in alternatives (AEC1, -33, -P, -Z variants), and practical design notes that complement the manufacturer datasheet with selection guidance.
NIS6351MT1TXG - 5V 3A Electronic eFuse | onsemi
The onsemi NIS6351MT1TXG is a +5V resettable electronic fuse (eFuse) protection IC delivering up to 3 A of continuous output current in a compact 10-pin WDFNW (3x3 mm) package. It integrates overcurrent protection, thermal latch, and fault shutdown functions in a single surface-mount device for USB power rail protection. An electronic fuse (eFuse) is an active circuit-protection IC that replaces traditional passive PPTC fuses and discrete fuse elements. Sitting within the hierarchy of power management ICs, an eFuse monitors the current flowing into a load and disconnects the power path within microseconds when a fault such as a short circuit, overcurrent, or overtemperature event is detected. Unlike one-time polymer fuses, an electronic fuse can reset automatically or latch off under system control, dramatically improving reliability and serviceability of hot-plug interfaces such as USB ports. The NIS6351 is described by onsemi as a cost-effective, resettable fuse which can greatly enhance the reliability of a USB application from both catastrophic and shutdown failures. Key characteristics include the 5 V rated input rail, 3 A current capability, a thermal latch feature, and a lead-free, RoHS-compliant WDFNW-10 (3x3 mm) footprint suited to space-constrained portable designs. The 'thermal latch' behavior means that once a severe overtemperature or overcurrent event trips the device, it stays off until the fault is removed and the part cools, protecting both the IC and downstream circuitry from repeated fault cycling. Typical applications include USB port power protection in host and peripheral devices, 5V distributed power rails in notebook computers and docking stations, hot-swappable accessory protection, and general-purpose 5V rail current limiting in industrial and consumer electronics. Where a robust, resettable protection element is required on a 5V line, the NIS6351 fits directly in series with the power path. For design, ensure that PCB copper area under the exposed pad of the WDFNW-10 package is adequate for the worst-case power dissipation during a fault, and follow onsemi datasheet layout guidance for input/output capacitance placement. Verify the current-limit setting against your USB port specification (e.g., USB 2.0 vs USB 3.0 current classes). This page synthesizes distributor pricing, availability, datasheet references, and practical design guidance not consolidated in the manufacturer datasheet alone.
NJU2103AM-TE1 - 3.8V System Reset IC | Nisshinbo
The Nisshinbo Micro Devices NJU2103AM-TE1 is a 3.8 V fixed-threshold system reset IC with three supply-voltage monitors, an active-low reset output, and an 8-pin surface-mount DMP package. The listed distributor specification identifies a 20 V maximum supply rating, 280 uA operating current, -0.3 V reset-level parameter, and 910 mW power dissipation. Its core function is to detect abnormal supply-voltage conditions and assert a reset signal so that a connected processor or control circuit can restart in a defined state. A voltage supervisor, also called a reset controller or supply-voltage detector, belongs to the power-management IC hierarchy. It compares one or more supply rails with internal or external thresholds and controls a reset or enable signal when a rail crosses the specified condition. Unlike a general-purpose comparator, a supervisor is designed for simple threshold monitoring, defined output behavior, and reliable system-startup coordination. The NJU2103A family provides three voltage monitors, according to the manufacturer product page. This multi-monitor architecture can supervise several related rails in one compact device and reduce the component count compared with separate single-channel supervisors. The -TE1 ordering code denotes the supplied package and tape-and-reel presentation, while the AM portion identifies the monitored threshold variant. Exact threshold tolerance and timing values should be confirmed in the manufacturer datasheet before release. The open-drain or open-collector reset architecture gives the designer control over the output polarity, pull-up voltage, and reset-release behavior. A pull-up resistor can connect the output to the logic supply used by the host controller. The output can therefore participate in wired-reset arrangements without imposing the monitor supply voltage directly on the receiving logic rail. Delay and debounce behavior must be selected against the host device's minimum reset pulse requirement. Typical uses include microcontroller reset circuits, industrial controllers, embedded systems, consumer equipment, and multi-rail power supervision. The compact DMP-8 package supports surface-mount assembly and fits control boards where space is constrained. Its principal design trade-off is monitoring capability versus the need to verify exact pin functions, threshold accuracy, and timing in the NJU2103A datasheet before schematic sign-off. Place the supervisor close to the monitored supply entry point and keep the reset trace away from high-current switching nodes. Confirm pull-up voltage compatibility, unused-monitor termination, exposed-pad grounding where applicable, and all absolute maximum ratings. This page combines verified distributor data, manufacturer family information, replacement guidance, and practical integration notes rather than repeating raw catalog parameters alone.
PM8805TR - IEEE 802.3bt PoE-PD Controller 57V 2A | STMicroelectronics
The STMicroelectronics PM8805TR is an IEEE 802.3bt Power over Ethernet (PoE) powered device (PD) interface and power system-in-package delivering up to 99.9 W, with a 57 V input rating, 2 A hot-swap output current capability, 33.5 V UVLO threshold, and a 43-pin VFQFPN (8x8 mm) exposed-pad package. A PoE powered device interface is the front-end circuit in any Ethernet-powered equipment that negotiates and extracts power from the PoE link. Within the power-management hierarchy, it sits above the raw powered line and below downstream DC-DC converters: it performs detection, classification, inrush control and isolation before local regulators take over. The PM8805 integrates this interface as a system in package, dramatically reducing external component count. Key features include dual embedded active bridge rectifiers with their own gate driving circuitry, an integrated charge pump to drive high-side hot-swap MOSFETs, a fully compliant 802.3bt PD interface supporting Type 3 and Type 4 power classes, and hot-swap protection. Because the bridge, hot-swap switch and PD controller share one package, board area and BOM cost shrink versus discrete solutions. Technically, the active bridge eliminates the four-schottky-diode rectifier front end, cutting conduction losses and improving overall power conversion efficiency for high-power 802.3bt deliveries. The controller supports 802.3af, 802.3at (PoE+) and 802.3bt on two channels, with undervoltage lockout at 33.5 V ensuring valid PoE voltage before power-up sequencing begins. Typical applications include IEEE 802.3bt wireless access points, IP security cameras, PTZ domes, network switches, video doorbells and any Ethernet-terminal equipment drawing up to 99.9 W from the powered line. When designing with the PM8805, provide a generous exposed-pad thermal connection on the PCB and observe the datasheet layout guidelines for the hot-swap path to manage inrush current and thermal stress during power classification and startup. This page synthesizes distributor pricing, application guidance, and availability information not found in the manufacturer datasheet, as of 2026-10-19.
REF1930 - 3V Dual-Output Voltage Reference | Texas Instruments
The Texas Instruments REF1930 is a precision, low-power, dual-output series voltage reference delivering a fixed 3V VREF output plus a 1.5V VREF/2 output with ±0.1% initial accuracy and up to 20 mA output current capability. It comes in the compact 5-pin SOT-23-THIN (DDC) package and operates from -40C to +125C. A voltage reference is a precision circuit that produces a stable output voltage independent of supply variation, load changes, and temperature. It is a fundamental building block of analog and mixed-signal systems, providing the conversion reference for ADCs, DACs, and comparators. References are either shunt or series types; the REF1930 is a series reference, operating like a low-dropout regulator that sources current to the load while holding a precise voltage. Key features include ±0.1% initial accuracy, a dual-output architecture (VREF and VREF/2) that eliminates a separate mid-supply bias divider, low quiescent current suitable for battery-powered portable instruments, and 20 mA sourcing capability for driving ADC reference inputs and op-amp bias networks. The REF1930 uses a bandgap-based architecture with internal trimming to minimize initial error. The dual-output design is particularly valuable in single-supply systems where bipolar input signals must be biased around a mid-rail common-mode point at an ADC input. The SOT-23-THIN package suits space-constrained portable designs. Typical applications include ADC input biasing, portable instrumentation, data acquisition systems, battery monitoring, and industrial process control front ends. Design tip: decouple both outputs adequately with ceramic capacitors, and limit DC loading on the VREF/2 output to preserve its accuracy.
REF3030AIDBZR - 3V 0.2% 50ppm/C Reference | TI
The Texas Instruments REF3030AIDBZR is a precision, low-power, low-dropout series voltage reference providing a fixed 3V output with ±0.2% initial accuracy and 50 ppm/°C maximum temperature drift in a 3-pin SOT-23-3 package. It sources up to 25 mA of load current while drawing only 42 µA quiescent current (typical), making it ideal for battery-powered and space-constrained designs. A voltage reference is a foundational building block in analog and mixed-signal systems: it establishes the stable benchmark voltage from which ADCs and DACs convert signals, comparators make decisions, and precision amplifiers operate. The REF3030AIDBZR belongs to the REF30xx family of CMOS series (bandgap) voltage references, a subset of the broader voltage reference category that includes shunt and series topologies, ultimately within power management ICs. Key features include low dropout operation with input voltages as low as 3.05V, enabling use directly after low-voltage LDOs or one-cell-lithium rails; 50 ppm/°C max drift ensuring stable output from -40°C to +125°C; and low 42 µA quiescent current that extends battery life in portable instruments. The CMOS architecture minimizes supply sensitivity and keeps line and load regulation tight. Technically, the device uses a CMOS bandgap core whose stable voltage is buffered by an output amplifier, achieving approximately 50 µVrms of output noise from 10 Hz to 10 kHz. Internal compensation ensures stability with capacitive loads up to 10 µF, and the series topology needs only 1 µF input decoupling in most designs. Typical applications include precision data-acquisition references for ADCs in battery-powered handheld meters, sensor-node systems, industrial process control, and comparator/op-amp bias rails in portable instrumentation. Design tip: place a 0.1 µF bypass capacitor close to the output pin and a 1 µF capacitor on the input; maintain VIN of at least 3.05V to keep the part in regulation. Pricing starts around $0.13 at volume as of 2026-08-30.
TCAN843-Q1 - 5Mbps CAN FD Transceiver Sleep | TI
The Texas Instruments TCAN843-Q1 is an automotive-grade, high-speed Controller Area Network (CAN) transceiver meeting the physical layer requirements of the ISO 11898-2:2024 high-speed CAN specification. It supports both classical CAN and CAN FD data rates up to 5 Mbps and is offered in 14-pin leaded (SOT and SOIC) and leadless (VSON) packages with wettable flanks for improved automated optical inspection (AOI). A CAN transceiver is the physical-layer interface between a CAN controller in a microcontroller and the differential twisted-pair bus. It converts logic-level TXD/RXD signals into differential CANH/CANL signals, providing the drive strength, fault tolerance, and noise immunity required in harsh automotive and industrial environments. Key features include 5 Mbps CAN FD support, four operating modes (normal, silent, standby, and low-power sleep), and a VIN pin tied to the microcontroller I/O supply that supports a 3.3V to 5.5V logic range. The INH output pin enables system-level battery-current reduction by selectively gating power supplies, allowing a low-current sleep state while the transceiver monitors the bus for wake-up frames. Protection features include thermal shutdown (TSD), TXD-dominant time-out (TXD DTO), load-dump support on VSUP, undervoltage protection, and CAN bus fault tolerance in 12V and 24V systems. The robust bus interface with high ESD tolerance ensures reliable operation in body electronics, gateways, and battery management systems. Typical applications include body control modules, gateway modules, battery management systems, and industrial transportation networks where always-on nodes must minimize quiescent battery drain while maintaining network responsiveness. When designing with the TCAN843-Q1, use proper 120-ohm bus termination, place the transceiver close to the connector to minimize stub length, and connect VIN to the microcontroller I/O supply to set the digital interface logic level.
TPD3S714AQRVCRQ1 - Automotive USB 2.0 Protection IC | TI
The Texas Instruments TPD3S714AQRVCRQ1 is an automotive-grade single-chip USB 2.0 interface protection IC integrating short-to-battery protection, short-circuit protection, and ESD protection for the USB connector VBUS line (5.25 V, up to 500 mA) and the USB data lines, housed in a 16-pin WQFN (RVC) package and qualified to AEC-Q100 for automotive deployment. An interface protection IC is a power-management and surge-suppression device that sits between a host controller and an external connector, guarding both the power rail and the high-speed data pins against fault conditions. Within the system hierarchy it belongs to the broader families of surge suppression ICs, circuit protection devices, and power management ICs. In automotive USB systems, connector pins are exposed to shorts to the 12-V battery rail, shorts to ground, load-dump transients, and electrostatic discharge, all of which can destroy unprotected transceivers. The TPD3S714-Q1 family integrates a current-limited VBUS power switch with short-to-battery and short-to-ground fault response, together with integrated data-line switches that provide best-in-class bandwidth for minimal signal degradation during USB short-to-battery events. The high-bandwidth data switches isolate the USB 2.0 D+/D- lines at fault detection, protecting the downstream transceiver while preserving signal integrity during normal full-speed and high-speed operation. According to the TI datasheet, the device is a single-chip solution for automotive USB hubs, head units, rear-seat entertainment, telematics, and media interface applications. Single-chip integration of the VBUS FET, data switches, and fault-control logic reduces BOM count versus discrete TVS, FET, and controller solutions, and the integrated solution reduces the protection response time relative to external discrete implementations. Typical applications include automotive USB charging ports and hubs, infotainment head units, rear-seat charging modules, and telematics control units where USB connectors face harsh fault environments. Design consideration: confirm the VBUS current-limit setting and fault flag behavior against the host controller power-sequencing requirements, and provide solid ground pours under the WQFN exposed pad for thermal and ESD performance. This page adds distributor pricing, drop-in family alternatives, design notes, and comparison data beyond the manufacturer datasheet.
TPS16630PWPR - 60V 6A eFuse with Adjustable PLIM | TI HTSSOP-20
The Texas Instruments TPS16630PWPR is a 60 V, 6 A integrated-FET electronic fuse (eFuse) with adjustable output power limiting (PLIM), housed in a 20-pin HTSSOP (PWP) PowerPAD package. Per the TI TPS1663x datasheet, it integrates a 31 mΩ pass FET, supports an operating input range of 4.5 V to 60 V, and offers an adjustable current-limit threshold from 0.6 A to 6 A with ±7% accuracy at room temperature. An eFuse (electronic fuse) is a solid-state circuit-protection device that replaces a traditional fusible link or PTC. Compared with a one-shot fuse, an eFuse can auto-retry or latch off, log faults, and offer precise, programmable thresholds. eFuses sit within the broader category of hot-swap controllers and power-path protection ICs, which in turn belong to the power-management IC family. PLIM adds a programmable output-power clamp on top of the current limit, allowing designers to cap inrush energy in capacitive loads and protect upstream sources from sustained over-power events. Key features of the TPS16630PWPR include: integrated 31 mΩ Rds(on) FET; 0.6 A to 6 A adjustable ILIM (±7%); 4.5 V to 60 V operating VIN; fast short-circuit response with circuit-breaker mode; output slew-rate control via dV/dT pin; adjustable UVLO and overvoltage lockout (OVLO); MODE pin for latch-off or auto-retry selection; fault flag (FLG) output; thermal shutdown; and a -40°C to +125°C junction-temperature operating range. The HTSSOP-20 PowerPAD package exposes a thermal pad that drops θJA to roughly 28 °C/W when properly soldered, supporting 6 A continuous current at modest VIN-VOUT deltas. Architecturally, the device uses an N-channel MOSFET controlled by an internal charge pump, an analog control loop for current and power limiting, and a fault-management state machine. The PLIM block multiplies sensed input voltage by load current and compares it against an external resistor-set reference, producing a power ceiling independent of load impedance. This approach allows tighter protection in applications where current alone is not enough to characterize stress on the source. Typical applications include 24-V industrial PLC I/O rails, factory-automation sensors, USB-PD source protection in 12-V/24-V adapters, server-board auxiliary rails, and automotive body-electronics loads operating on 12-V/24-V battery systems. Designers reach for the TPS16630PWPR when discrete hot-swap controllers plus external FETs become too large or too expensive for the BOM. When designing with this part, choose the ILIM resistor using RILIM = 12 kΩ × 6 A / ILIM and verify inrush energy stays within the SOA of the input source. The PowerPAD must be soldered to a copper area of at least 1 in² for the thermal performance quoted in the datasheet, and decoupling capacitors should be placed within 2 mm of IN and OUT pins to keep high-di/dt transients out of the control loop. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, structured for engineers evaluating the TPS16630PWPR against discrete hot-swap, fuse, and TVS solutions.
TPS2291L02BYCJR - 2A 22mΩ Load Switch | TI
The Texas Instruments TPS2291L02BYCJR is a compact 5.5V, 2A load switch with 22 mΩ on-resistance and 90 nA quiescent current, housed in a 4-ball DSBGA (0.62 mm x 0.62 mm) wafer-scale package. A load switch is a power management IC that places a power MOSFET between a supply rail and its load, allowing a controller to gate power on and off electronically. In the system power hierarchy, load switches sit between the voltage regulator (or battery) and downstream loads such as sensors, radios, and processors, providing controlled power sequencing, inrush limiting, and leakage isolation. They are essential in battery-powered designs where every microamp of standby drain matters. Key features of the TPS2291L02 include an input voltage range of 1.05V to 5.5V, a maximum continuous current of 2A, and an extremely low 90 nA quiescent current. A quick output discharge (QOD) function actively pulls the output low when the switch is disabled, preventing floating rails from back-powering the load. The controlled turn-on time limits inrush current during startup, and the enable (EN) pin interfaces directly with low-voltage control signals from MCUs and processors. Internally, the device uses an N-channel MOSFET as the pass element, driven by an internal charge pump, which enables low RON across the full input range while keeping the die tiny enough for a 0.62 mm square DSBGA footprint. This makes it suitable for space-constrained portable designs. Typical applications include smartphone and tablet peripheral rail switching, battery-powered IoT sensor power gating, camera module power control, and power sequencing in multi-rail processor systems where module power-up order must be enforced. When designing with this part, remember that DSBGA packages require careful PCB layout: lands must be non-solder-mask-defined per TI recommendation, and inspection is best done with X-ray. Also budget for the switch's RON-related drop at 2A continuous load. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS22954-Q1 - 5.7V 5A 14mΩ Load Switch | TI | Automotive
The Texas Instruments TPS22954-Q1 is a single-channel N-channel high-side load switch rated for 5.7 V input, 5 A continuous current, with an ultra-low 14 mΩ on-resistance, housed in a 10-pin WSON (DQC, 3x2 mm) package. This automotive-grade power-distribution switch integrates controlled turn-on, adjustable rise time, voltage monitoring, and output discharge functions in a compact footprint. A load switch is a power management IC placed in series with a voltage rail to connect or disconnect power to downstream loads under logic control. Within the power management hierarchy, load switches sit between the supply and the load, complementing voltage regulators by adding switching, inrush control, sequencing, and fault protection. They are essential wherever rails must be turned on softly, sequenced in order, or monitored for faults. Key features of the TPS22954-Q1 include the 14 mΩ typical on-resistance that minimizes voltage drop and conduction loss at full 5 A load, a wide 0.7 V to 5.7 V operating range covering 1.0 V, 1.8 V, 3.3 V, and 5 V rails, an adjustable rise time via an external capacitor for controlled inrush, and quick output discharge for defined rail states. The device is characterized for operation over the -40°C to +105°C ambient range required by automotive applications. Technically, the switch uses a low-RON N-channel MOSFET pass element with an integrated charge pump to drive the gate above the rail, delivering very low insertion loss. Controlled turn-on suppresses inrush current peaks that would otherwise cause supply droop, while voltage monitoring and output diagnostics give the system controller visibility into rail health - valuable for functional-safety oriented designs. Both DQC (0.5 mm pitch) and DSQ (0.4 mm pitch) package versions are supported on the TPS22954EVM evaluation module. Typical applications include automotive ADAS and infotainment power rails, electronic control unit (ECU) subsystem sequencing, power switching for cameras, displays, and communication modules, and general high-current rail switching in industrial systems where a Q100-class device is preferred. A key design consideration is thermal management: at 5 A and 14 mΩ, conduction losses are roughly 0.35 W (estimated from I²R), so a solid ground-plane pour under the die attach pad is important. Also account for the adjustable rise-time capacitor sizing against your inrush budget. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design guidance not found in the manufacturer datasheet.
TPS22990NDMLT - 10A, 5.5V, 3.9mOhm Load Switch | TI
The Texas Instruments TPS22990NDMLT is a 5.5 V, 10 A single-channel load switch with 3.9 mOhm on-resistance, housed in a 10-pin WSON (3x2 mm) package. It integrates an N-channel MOSFET high-side switch operating from a 0.6 V to 5.5 V input range, with a controlled and adjustable turn-on and an integrated power-good (PG) indicator. A load switch is a power management IC that sits between a supply rail and its load, using an internal MOSFET to connect or disconnect power under logic control. Load switches belong to the broader family of power distribution switches and hot-swap devices within power management ICs. They protect downstream circuitry during power sequencing, limit inrush current, and isolate faulty or idle loads to save energy in multi-rail systems. Key differentiating features of the TPS22990NDMLT include the very low 3.9 mOhm on-resistance, which minimizes conduction losses at the full 10 A continuous current (approximately 0.39 W of estimated I2R dissipation), the wide 0.6 V to 5.5 V input range that supports low-voltage core rails as well as standard 5 V and 3.3 V rails, adjustable rise time for inrush-current control, and soft-start behavior. An integrated power-good output simplifies rail monitoring and power-sequencing handshakes, and the TPS22990N variant adds optional output discharge functionality to actively pull the output low when the switch is off. Technically, the device uses an N-channel MOSFET as the pass element and requires a bias supply above the input rail to fully enhance the switch, keeping the on-resistance low even at sub-volt input levels. The controlled turn-on circuitry charges the output gradually, with the slew rate settable by an external capacitor, allowing designers to trade startup time against inrush current and voltage droop on the upstream rail. Typical applications include SSD and storage power distribution, server and datacenter point-of-load switching, FPGA and ASIC core-rail power sequencing, battery-powered portable systems, and industrial 5 V rail isolation. When designing with this part, provide a solid ground plane and adequate copper area for the VOUT pins, since 10 A of continuous current demands low-impedance thermal and electrical paths. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS23521 - -10V to -80V Hot Swap Controller | Texas Instruments
The Texas Instruments TPS23521 is a high-performance hot swap controller for -10V to -80V telecom power systems, integrating dual current limit and dual gate drive in a 16-pin TSSOP (PWT/PWR) package. It enables safe board insertion and removal from live -48V backplanes, serving network routers, switches, and other high-power telecom equipment. A hot swap controller is a power management IC that safely connects and disconnects a load from a live power bus, limiting inrush current and preventing connector arcing and system glitches. It works with an external pass MOSFET, current sensing, and gate control, and belongs to the broader power management IC hierarchy alongside e-fuses and hot swap controllers. Key features include a 200V absolute maximum rating for survivability during lightning surge tests per IEC61000-4-5, dual current limit with dual gate drive for independent control of two MOSFETs, and a soft start capacitor disconnect function that enables soft start at power-up while improving transient response in normal operation. The device operates over -40C to +85C and is RoHS compliant. The TPS23521 uses a proprietary architecture providing precise current sensing and fast response to overcurrent faults. Its high-voltage capability and robust design make it well suited for harsh telecom environments with -48V battery plants, where input transients from lightning surge and hot swapping are common design challenges. Typical applications include -48V hot swap in telecom rectifiers, network routers, Ethernet switches, and base station power distribution. With appropriate external MOSFETs, the dual gate drive supports high-current designs up to several hundred amps. Design tip: choose the soft start capacitor to limit inrush current to safe MOSFET SOA levels, and provide low-inductance, thermally adequate PCB paths for the external pass devices. Pricing varies by package suffix and quantity; refer to authorized distributors for current stock and pricing as of 2026-08-30.
TPS23882RTQT - 8-Ch Type-3 PoE PSE Controller | TI
The Texas Instruments TPS23882RTQT is an 8-channel, Type-3, 2-pair Power Sourcing Equipment (PSE) controller with SRAM programmability and 200 mOhm current sense resistors, housed in a 56-pin VQFN (8x8 mm) package. It inserts power onto Ethernet cables in accordance with IEEE 802.3bt, and also supports 802.3at (PoE+) and 802.3af (PoE) standards. A PoE PSE controller is a power management IC that sits at the switch or injector side of an Ethernet link. It performs powered-device detection, classification, mutual identification, and controlled power application per the IEEE 802.3 power-over-Ethernet specifications, protecting both the cable plant and the PD from faults such as overcurrent and inrush events. Key features include 8 independent PoE channels for 2-pair power delivery, IEEE 802.3bt Type-3 compliance, on-chip SRAM for firmware and configuration flexibility, and reduced 200 mOhm sense resistors that lower power dissipation versus earlier generation designs. The TPS23882 improves on the TPS2388 with these lower sense resistance values and SRAM programmability, simplifying thermal design in high-density switches. Architecturally, the device integrates detection and classification engines per port, I2C and autonomy-mode operation, port remapping, and protection features including overcurrent, overload, and short-circuit handling. Port remapping and pin-to-pin compatibility with the TPS2388, TPS23880, and TPS23881 devices enable interchangeable 2-layer PCB designs across different system PoE power configurations, easing migration from previous generation PSE designs. Typical applications include enterprise PoE switch line cards, midspan injectors, campus and industrial network infrastructure, and wireless access point powering systems where multiple 802.3bt-capable ports are required in a compact footprint. A key design consideration is sizing the external hot-swap MOSFETs and sense resistors for the per-port current class, and providing adequate copper area under the VQFN exposed pad for thermal dissipation at full 8-port load. This page synthesizes distributor pricing, pin-compatible family alternatives, and practical design notes not found in the manufacturer datasheet.
TPS26400PWPR - 42V 2A eFuse w/ Reverse Polarity | Texas Instruments
The Texas Instruments TPS26400PWPR is a 42-V, 2-A industrial eFuse (electronic fuse) with integrated reverse-input polarity protection, housed in a 16-pin HTSSOP (PWP) package with an exposed thermal pad. It is designed for 4.5 V to 42 V operation and integrates a low-impedance N-channel MOSFET pass element, programmable current limit, and reverse-input blocking in a single IC. An eFuse (electronic fuse) is a solid-state circuit-protection device that replaces a traditional glass-cartridge fuse or PTC with an integrated MOSFET-based switch. It detects overcurrent, overvoltage, short-circuit, and reverse-polarity faults in microseconds, then either latches off or auto-retries depending on configuration. Within the broader system hierarchy, eFuses sit between discrete protection components (TVS diodes, PTC) and supervisor ICs in the power-management block, providing fast, resettable protection for downstream rails loads. Key features of the TPS26400PWPR include an integrated back-to-back FET topology for true reverse-input blocking down to -42 V, an adjustable current-limit threshold set by an external resistor (RILIM), programmable inrush current slew rate via SS pin, and a fault output (FLT) for system telemetry. The device operates over the -40 °C to +125 °C industrial temperature range and offers an IMON current-monitor output for accurate load-current measurement. The TPS26400PWPR uses TI's proprietary hot-swap controller architecture with charge-pump gate drive, enabling a typical Rds(on) of approximately 30 mΩ in the pass FET path. Internal comparators monitor VIN, VOUT, and current-sense voltages with programmable response timing, while the FAULT pin supports latch-off or auto-retry modes. Reverse-polarity protection is achieved without additional series diodes loss, preserving efficiency in 24-V industrial bus applications. Typical applications include 24-V industrial PLC I/O protection, factory-automation sensor and actuator rails, motor-drive auxiliary supplies, building-automation backplane power, and PoE/PoDL powered-device input protection. The wide 4.5 V to 42 V input range also covers 12-V and 36-V automotive and telecom nominal buses. When designing with this device, derate the HTSSOP-EP package carefully at high VIN and full 2-A load - at VIN = 24 V and VOUT = 12 V, the IC dissipates roughly 24 W under fault conditions and requires substantial copper pour to keep junction temperature in spec. This page synthesizes distributor pricing, drop-in alternatives (TPS26600PWPR, TPS2HB50AQPWPRQ1, etc.), and practical design notes not found in the TI datasheet alone.
TPS26636PWPR - 60V, 6A eFuse with Power Limit & Surge Protection
The Texas Instruments TPS26636PWPR is a 4.5-V to 60-V, 31-mΩ, 0.6-A to 6-A integrated eFuse (electronic fuse) with output power limiting and surge protection, housed in a 20-pin HTSSOP (PWP) package with an exposed thermal pad. It combines a 31-mΩ N-channel FET, programmable current limit, true RMS power-limiting, and surge protection in a single hot-swap IC, eliminating the discrete MOSFET + supervisor + TVS combination typically required for 24-V/48-V industrial input protection. An eFuse (electronic fuse) is a solid-state circuit-protection IC that replaces traditional PTC fuses, polyfuses, or mechanical circuit breakers with an integrated MOSFET and analog control loop. It monitors input voltage, load current, and junction temperature, and reacts within microseconds to overcurrent, short-circuit, overvoltage, and thermal events. Within the power-management IC hierarchy, eFuses sit between ideal-diode/ORing controllers and hot-swap controllers, providing fast, resettable protection for downstream DC rails. The TPS26636 is specifically classified as a power-limiting eFuse, meaning it can clamp sustained output power rather than just current. Key specifications include 4.5 V to 60 V operating input range, 0.6 A to 6 A adjustable current limit (set by ILIM pin resistor), 31-mΩ typical on-resistance, integrated surge protection, programmable inrush slew rate via dVdT pin, load current analog output (IMON), fault output (FLTb), and reverse-current blocking when reverse-current protection is required. The -40 °C to +125 °C junction temperature range and 20-HTSSOP PowerPAD package with low θJA support demanding industrial and telecom environments. Architecturally, the TPS26636 uses a charge-pump-driven N-channel MOSFET, a precision current-sense amplifier, an internal bandgap reference, and a configurable power-limit engine. Power limiting is computed as an analog multiplier of VIN × IOUT, allowing the device to fold back current at high line voltage, protecting upstream wiring from over-dissipation. The integrated TVS-style surge clamp and reverse-blocking comparator remove external TVS/MOSFET pairs from the BOM, which is a significant board-area and reliability win. Typical applications include 24-V industrial PLC I/O, factory-automation sensor backplanes, 48-V telecom rectifier secondary protection, motor-drive auxiliary rails, e-mobility accessory power, and any 24-V/48-V distributed-bus system where sustained fault energy must be bounded. The TPS26636 is also widely used as a USB-PD sink protection element at the 20-V/5-A tier. When laying out the PCB, place input/output ceramic capacitors within 5 mm of their respective pins and stitch the thermal pad to a copper pour of at least 1 sq. inch on each layer, plus thermal vias in a 1.2-mm grid, to keep the 31-mΩ FET below thermal shutdown at maximum dissipation. The IMON output can drive an ADC directly for telemetry - this is rare in discrete-fuse replacements. This page synthesizes distributor pricing, drop-in alternatives, and practical layout notes that go beyond the manufacturer datasheet to help procurement and design engineers evaluate the TPS26636PWPR for industrial protection designs.