Power Management
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Products (2,800+)
NCP81269MNTXG - Synchronous Buck Controller, 2-Bit VID | onsemi
The onsemi NCP81269MNTXG is a synchronous buck controller with 2-bit VID inputs, optimized for converting battery or adapter voltage into the power supply rails required in notebook and desktop systems. Housed in a 20-pin QFN (HVQCCN) package, it features a switching frequency up to 600 kHz, automotive temperature grade support up to 125 °C, and dynamic slew-rate-controlled output voltages. A synchronous buck controller is a type of DC-DC switching controller that uses two MOSFETs in a half-bridge configuration to step down a DC input voltage to a lower regulated DC output. Compared to an asynchronous buck (diode-rectified), the synchronous topology replaces the Schottky rectifier with a low-RDS(on) MOSFET, which significantly improves efficiency at light-to-medium loads and reduces conduction losses. Synchronous buck controllers belong to the broader family of switching regulators (buck, boost, buck-boost), which themselves fall under the power management IC (PMIC) hierarchy for computing and portable platforms. Key features include a 2-bit VID (voltage identification) interface that allows dynamic output voltage slewing for power-state transitions (P-state, VID-based power management in modern CPUs and GPUs), an externally programmable soft-start via a single capacitor, and wide input voltage tolerance suitable for both battery and adapter operation. The 600 kHz switching frequency enables compact inductor selection, while the automotive temperature grade supports harsh-environment deployment. Technically, the NCP81269 integrates high-side and low-side MOSFET drivers, a fixed-frequency voltage-mode control loop, and the VID decoding logic directly on-chip. The 2-bit VID scheme provides four discrete output voltage setpoints selected by external logic inputs, allowing the system controller to command voltage changes for low-power states without software intervention. This makes the controller well suited to CPU/GPU core rails, chipset power, and DDR memory termination rails in space-constrained notebook platforms. Typical applications include notebook system rails, desktop motherboard buck rails, chipset and memory termination supplies, and embedded computing platforms requiring dynamic voltage scaling. The wide operating temperature range and automotive grade make it attractive for industrial and automotive infotainment boards that demand similar power-rail architectures. When designing with this controller, ensure the bootstrap capacitor is sized per the high-side driver's requirements and that the feedback compensation network is matched to the selected output L-C filter. The 2-bit VID inputs are referenced to the controller's logic supply; verify logic-level thresholds match the driving GPIO or system controller outputs. This page synthesizes distributor pricing, drop-in alternative guidance, and practical design notes drawn from manufacturer datasheet material - providing added engineering context not found in the original datasheet.
NCR18650GA - 3450mAh 10A 18650 Li-Ion | Panasonic
The Panasonic NCR18650GA is a high-capacity cylindrical 18650 lithium-ion rechargeable cell rated at 3450 mAh nominal capacity and 10 A continuous discharge, built on a Nickel-Cobalt-Aluminum (NCA) cathode chemistry. The cell measures 18.6 mm in diameter by 65.2 mm in length (bare cell dimensions, without PVC tube), with a typical mass of approximately 48 g. Its nominal voltage is 3.6 V, charged to 4.2 V and discharged to a 2.5 V cutoff. What is an 18650 lithium-ion cell? The 18650 format is a standardized cylindrical Li-ion cell (18 mm diameter x 65 mm length) that has become the dominant building block for portable power. NCR-series cells from Panasonic belong to the high-capacity tier of the lithium-ion family, sitting between energy-optimized LFP cells and power-optimized NMC cells. Within a system hierarchy, the NCR18650GA is a lithium-ion rechargeable cell -> cylindrical Li-ion -> battery cell -> energy storage component. Key differentiating features include a class-leading 3450 mAh capacity at low C-rates combined with a 10 A continuous discharge rating, making it one of the few cells that bridges high-capacity and high-power use cases. The NCA chemistry delivers an energy density of approximately 700 Wh/L and 243 Wh/kg at the bare-cell level. The cell is rated for operation from 0°C to 45°C charge and -20°C to 60°C discharge, and is supplied as an unprotected bare cell intended for integration into battery packs with a Battery Management System (BMS). Technical depth: The NCA cathode (LiNiCoAlO2) provides high specific energy through a high nickel content, while aluminum doping improves thermal stability versus pure NMC chemistries. The graphite anode uses a standard intercalation chemistry. Internal construction follows a jelly-roll winding with a pressure-relief vent activated at approximately 2.5 MPa. Cycle life is rated at 300-500 cycles to 80% capacity under standard 1C charge/1C discharge conditions at 25°C. Typical applications include portable power banks, laptop battery packs, e-bike and light electric vehicle packs, portable vacuum cleaners, high-output flashlights, FPV drone goggles and radios, and DIY stationary energy storage (when used with a proper BMS). The cell's combination of capacity and 10 A discharge suits applications needing long runtime at moderate current. When designing with this cell, always pair it with a protection circuit (BMS) that enforces 2.5 V undervoltage cutoff, 4.2 V overcharge cutoff, and overcurrent protection. Avoid charging below 0°C to prevent lithium plating. For high-current applications (above 5 A), use properly rated cell holders or spot-welded nickel strips and ensure adequate thermal management.
NCV1362ABDR2G - 50W Automotive QR Flyback Controller | onsemi
The onsemi NCV1362ABDR2G is a highly integrated quasi-resonant (QR) peak current-mode primary-side flyback controller targeting low-power off-line Switch-Mode Power Supplies (SMPS) from a few watts up to 50 W in automotive and commercial applications. Housed in an 8-pin SOIC (SOIC-8 / NB / 8-SOIC) package, the device operates with a switching frequency range of 1 kHz to 140 kHz (typical 110 kHz), a maximum switching frequency of 130 kHz, and is powered from a 6.5 V to 28 V supply on the VCC pin. A quasi-resonant flyback controller is a type of AC-DC offline switching controller that turns the primary MOSFET on when the drain voltage rings to its valley, dramatically lowering switching losses and EMI versus a hard-switched PWM controller at fixed frequency. It belongs to the controller hierarchy: AC-DC controller -> offline switcher -> quasi-resonant controller -> peak current-mode controller -> power management IC. Primary-side regulation (PSR) eliminates the opto-coupler and secondary reference, enabling tighter CV/CC accuracy with a smaller BOM. Key features of the NCV1362ABDR2G include quasi-resonant valley-switching for reduced EMI and improved efficiency, primary-side constant-voltage and constant-current regulation (no opto-coupler required), a wide VCC range of 6.5 V to 28 V, built-in protections (over-voltage, over-current, over-power, short-circuit, and thermal shutdown), and a 1 kHz to 140 kHz programmable switching-frequency range. Automotive-grade qualification per onsemi's NCV prefix supports AEC-Q100 applications such as USB chargers, e-bike chargers, and LED drivers. The controller uses a current-mode control architecture with a transconductance error amplifier and an internal reference, allowing the designer to set loop dynamics with a single external compensation network on the COMP pin. The quasi-resonant detection block identifies the drain-voltage valley and synchronizes turn-on, lowering dv/dt stress on the MOSFET and reducing conducted EMI by up to 10 dB relative to a fixed-frequency controller at the same load. Typical end uses include USB Type-C chargers (5 V / 3 A) for vehicles, 12 V-24 V auxiliary supplies in two-wheeler and four-wheeler electrical systems, LED driver front-stages, e-bike and e-scooter chargers, white-goods auxiliary supplies, and industrial IoT gateways requiring isolated low-power rails. The wide VCC tolerance also allows direct operation from rectified 12 V or 24 V battery buses without an external regulator. When designing with the NCV1362ABDR2G, place the gate-drive resistor and the current-sense resistor as close to the CS and DRV pins as possible, and keep the high-voltage drain loop area minimal to limit ringing that could falsely trigger the QR detector. The VCC hold-up capacitance must sustain operation through the auxiliary-winding dropout interval at minimum line voltage.
NCV4269AD250R2G - 5V 150mA Micropower LDO | onsemi
The onsemi NCV4269AD250R2G is a 5.0 V fixed-output, micropower low-dropout linear regulator rated for 150 mA output current and packaged in a 14-pin SOIC. It accepts an input voltage up to 45 V, maintains output accuracy within ±2%, and includes a delayed active reset output plus a sense input/output monitoring interface for processor supervision. The maximum dropout voltage is 0.5 V at 100 mA, making it suitable for industrial and embedded systems where a regulated 5 V rail must be produced from a higher-voltage source. The device also offers a programmable delay and adjustable reset behavior through its monitoring logic. Its micropower architecture targets low-consumption control, instrumentation, and embedded equipment where standby dissipation matters. The NCV4269 family is identified by onsemi as a 5.0 V precision micropower voltage regulator with 150 mA capability. The AD250R2G ordering option uses the 14-SOIC package and is identified by DigiKey as a positive, fixed, single-output linear regulator. Its combination of wide input-voltage headroom, supervised reset, and low quiescent-current operation makes it more than a basic 5 V LDO: it is a power-management subsystem component for systems that need controlled startup and reliable brownout notification. Typical applications include automotive and industrial control modules, sensor interfaces, low-power embedded processors, alarm systems, and regulated 5 V supply rails. Because the part is intended for a broad operating environment, verify temperature-range, capacitor, and reset-timing requirements against the manufacturer datasheet before production release.
NCV4274ADS50R4G - 400mA 5V Fixed LDO Regulator | onsemi
The onsemi NCV4274ADS50R4G is a precision micro-power low-dropout (LDO) linear voltage regulator delivering a fixed 5.0 V output at 400 mA from a wide 5.5 V to 40 V input range, housed in a 3-pin D2PAK (TO-263) surface-mount package with an exposed thermal pad. The device belongs to the NCV4274 family and is qualified to AEC-Q100 for automotive applications, providing ±2% output accuracy at 25 °C. An LDO (low-dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage, by using a pass transistor operating in the linear region rather than a switching element. The LDO belongs to the broader category of linear regulators, which sit within voltage regulators, which are part of power management ICs. LDOs are preferred over switching regulators wherever low output noise, fast line-load response, and minimal external component count are critical, although they dissipate (VIN − VOUT) × IOUT as heat. Key features include a low 250 mV typical dropout voltage at full 400 mA load, a low quiescent current of only 150 µA with a 1.0 mA load, and integrated protection functions including over-current, over-temperature, and reverse-input protection. The D2PAK package offers low thermal resistance for heat extraction in harsh environments, while the automotive-compliant NCV designator confirms PPAP documentation availability. The device uses a precision bandgap reference and an internal PNP pass transistor architecture to achieve tight line and load regulation. The wide input voltage tolerance supports load-dump and jump-start transients common in 12 V and 24 V automotive systems without additional front-end protection. Typical applications include automotive body electronics, infotainment and instrument cluster power rails, industrial 24 V sensor supplies, and any post-regulation stage that requires a clean 5 V rail from a higher-voltage battery bus. When ordering panels, the "50" suffix denotes 5.0 V output and "ADS50R4G" indicates the D2PAK package on a 800-unit reel. When designing with this device, derate the output current according to PCB copper pour and ambient. Pickups for both input and output capacitors should be low-ESR ceramic or tantalum and placed as close to the IC pins as possible. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
NCV5703CDR2G - High-Current IGBT Gate Driver, SOIC-8 | onsemi
The onsemi NCV5703CDR2G is a high-current, high-performance stand-alone IGBT gate driver with non-inverted input logic, housed in an 8-pin SOIC package and qualified to the AEC-Q100 standard for automotive use. The device integrates both high-side and low-side drive channels and delivers peak source/sink currents typically in the multi-ampere range, allowing it to switch medium-to-high-power IGBT modules directly without external booster stages. A wide supply range supports operation from standard logic rails up to the bus voltages commonly used in industrial and automotive power conversion. A gate driver IC (also called a gate driver or IGBT driver) sits between a low-power controller such as an MCU, DSP, or FPGA and the gate of a power switch. The driver's job is to translate the controller's logic-level PWM signal into a high-current drive that can rapidly charge and discharge the IGBT's gate capacitance, minimizing switching losses and preventing shoot-through. Within the broader power electronics hierarchy, the NCV5703CDR2G is a half-bridge gate driver, itself a member of the gate driver family, which belongs to the power management IC category of semiconductors. Key differentiating features include an integrated Active Miller Clamp, built-in DESAT (desaturation) short-circuit protection, and an under-voltage lockout (UVLO) on the driver supply. The non-inverting input logic simplifies MCU interface design, while the wide VCC operating range and automotive-grade qualification make the device suitable for PTC heaters, EV chargers, solar inverters, induction heating, and motor drive stages. The NCV5703 series uses a high-speed CMOS input stage coupled with a high-current totem-pole output structure. The 8-pin SOIC footprint is small for its drive strength, and the device's high dV/dt immunity combined with internal negative gate drive capability improves dv/dt-induced turn-on robustness. The integrated Active Miller Clamp suppresses parasitic turn-on caused by the IGBT's Miller capacitance during high-voltage transitions. Typical applications include EV onboard chargers, PTC heater drives for cabin heating, industrial motor drives, solar string inverters, induction heating cookers, and uninterruptible power supplies. In each case, the NCV5703CDR2G provides the high-current gate charge and discharge needed to switch high-voltage IGBTs efficiently. A key design consideration is the trade-off between the small SOIC-8 footprint and the multi-ampere drive currents; designers must ensure adequate PCB copper area for thermal dissipation and short gate-drive traces to minimize parasitic inductance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
NCV68061SNAIT1G - Ideal Diode NMOS Controller | onsemi
The onsemi NCV68061SNAIT1G is a reverse polarity protection and ideal diode N-channel MOSFET controller that drives an external NMOS transistor to replace power rectifier diodes with far lower loss and lower forward voltage, housed in a 6-pin TSOT-23-6 (SOT-23-6 Thin) surface-mount package with a quiescent supply current of just 215 uA. An ideal diode controller is a power-management IC that continuously monitors the voltage across an external MOSFET and switches it on or off to emulate a diode without the conventional forward voltage drop of 0.4 V to 0.7 V. In the power-supply hierarchy, it sits in the protection and power-path management layer alongside ORing controllers, hot-swap controllers and load switches, making it a key element in N+1 redundant power architectures where supplies are paralleled. Key features include reverse polarity protection, reverse current blocking, and N+1 ORing controller functionality. Because the NCV68061 controls the ON/OFF state of the external N-channel MOSFET according to the source-to-drain voltage, the conduction loss is limited to I2xRDS(on) of the MOSFET rather than a fixed diode drop, dramatically reducing power dissipation and heat-sinking requirements in high-current paths. Technically, the device senses the differential voltage across the external MOSFET and drives the gate to regulate or block conduction, providing a fast response that blocks reverse current before it can flow from a higher-potential output back into a failed or lower-voltage input rail. The low 215 uA supply current makes it suitable for always-on automotive and battery-fed systems where every milliamp matters. Typical applications include automotive power-path protection, N+1 redundant power-supply ORing in telecom and networking infrastructure, and reverse-battery protection in industrial systems. The NCV prefix and onsemi classification confirm its automotive-grade positioning, and an official evaluation board (NCV68061SNAIT1G-GEVB) is available for rapid prototyping. Design consideration: because the controller drives an external MOSFET, total performance depends heavily on the selected NMOS - choose a device with low RDS(on) at the available gate drive, and verify the source-to-drain sensing thresholds in the manufacturer datasheet before finalizing the layout. This page synthesizes distributor pricing, package data, and application guidance not found together in the manufacturer datasheet, with pricing as of 2026-10-19.
NCV68261MTWAITBG - Ideal Diode HS NMOS Controller | onsemi
The onsemi NCV68261MTWAITBG is a reverse polarity protection and ideal diode NMOS controller with an optional high side switch function, driving one or two external N-channel MOSFETs from a 6-pin WDFNW (2x2 mm) surface-mount package. It is intended as a lower-loss, lower-forward-voltage replacement for power rectifier diodes and mechanical power switches in automotive power paths. An ideal diode controller is a power-management device that drives an external MOSFET to emulate a diode without the conduction losses of a p-n or Schottky junction. Where a conventional rectifier diode drops roughly 0.5 V to 0.7 V and dissipates significant heat at high current, an ideal diode stage drops only Iload x Rds(on) of the MOSFET, cutting forward-voltage loss by an order of magnitude. In the vehicle power hierarchy - battery feed, reverse-polarity guard, load switch, point-of-load regulator - this part occupies the protection and switching layer, downstream of the fuse box and upstream of the load. Key features include MOSFET gate control driven directly by the state of the Enable pin, support for one or two N-channel MOSFETs in ideal-diode or high-side-switch configurations, and automotive-grade qualification signaled by the NCV prefix. Replacing a mechanical relay or a series Schottky with this controller plus a low-Rds(on) NMOS reduces forward voltage, power dissipation, and hot-swap contact wear in the power distribution path. Technically, the controller senses the anode-cathode orientation across the external MOSFET and adjusts the gate to block reverse current, while the enable input determines ON/OFF state. Because the external MOSFET sets the current rating, designers can scale the same controller from a few amperes to tens of amperes by selecting an appropriate NMOS - a key advantage over fixed-rating protection ICs. Typical applications include automotive battery reverse-polarity protection, 12 V and 24 V power distribution modules, ECU main power feeds, and industrial systems replacing mechanical relays with solid-state switching. The automotive temperature-grade rating suits underhood and body-electronics environments. Design consideration: the forward-drop saving depends entirely on the chosen MOSFET Rds(on); verify gate-drive amplitude and reverse-blocking behavior at cold crank and load-dump conditions before finalizing the BOM. This page synthesizes distributor pricing, functional cross-references, and practical design notes not found in the manufacturer datasheet alone.
NCV68261MTWAITBG-GEVB - Ideal Diode Controller Eval Board | onsemi
The onsemi NCV68261MTWAITBG-GEVB is an evaluation board for the NCV68261, a reverse polarity protection and ideal diode NMOS controller with optional high side switch function from onsemi. The board lets engineers assess the NCV68261MTWAITBG controller IC, which is housed in a 6-pin WDFNW (2x2 mm) package, in real power path circuits before committing to a PCB layout. An ideal diode controller is a power management IC that drives external N-channel MOSFETs to emulate a diode with near-zero forward voltage drop. In the power path hierarchy (ideal diode controller -> power switch driver -> power management IC), it replaces conventional power rectifier diodes and mechanical switches, which waste power as heat. The NCV68261 sets the ON/OFF state of one or two external N-channel MOSFETs based on the state of the Enable pin and the input-to-drain differential voltage polarity, blocking reverse current and protecting downstream electronics against reversed battery connections. Key features of the NCV68261 family include reverse polarity protection, ideal diode operation with fast reverse-current blocking, and an optional high side switch mode controlled by the Enable pin. Automotive-grade qualification supports 12 V and 24 V vehicle electrical systems, making the controller suited to battery-fed power rails where low forward drop directly reduces conduction losses and heat sink requirements. The evaluation board ships pre-populated with the NCV68261MTWAITBG controller and the external MOSFET network, providing access to input, output, enable, and gate nodes for instrumentation. Engineers can measure forward voltage drop, reverse-recovery blocking time, quiescent current, and transient response under realistic load conditions. It also demonstrates both basic configurations described in the datasheet: the ideal diode application and the reverse polarity protection plus high side switch application. Typical evaluation targets include automotive battery reverse protection modules, industrial 24 V supply front ends, and low-loss ORing of redundant supplies. Board bring-up with the NCV68261MTWAITBG-GEVB shortens design cycles because layout, thermal, and fault behavior can be verified against the datasheet electrical characteristics before tape-out. A key design consideration is MOSFET selection: the controller drives external NMOS transistors, so gate charge, Rds(on), and SOA determine the achievable forward drop and fault robustness. This page synthesizes distributor pricing and availability, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
NCV7240DPR2G - 8-Channel 600mA Low-Side Driver | onsemi
The onsemi NCV7240DPR2G is an automotive-grade octal low-side relay and solenoid driver capable of sinking up to 600 mA per channel in a 24-pin SSOP package. It integrates eight open-drain N-channel power switches with on-resistance of approximately 1.5 ohm and provides SPI-based output control plus parallel addressable inputs in pairs, giving designers flexibility between serial daisy-chained or direct parallel command modes. A low-side driver is a power-distribution switch that connects a load to ground rather than to the positive rail, and an octal low-side driver combines eight such switches on one die. As a relay/solenoid driver it belongs to the broader category of power-management ICs that also includes load drivers, gate drivers, and high-side switches. Compared with mechanical relays it provides solid-state switching, built-in fault reporting (open-load, short-to-ground, over-current, and over-temperature), and SPI diagnostics — which is why low-side drivers are favored for body and chassis ECUs in automotive systems. Key specifications include 600 mA continuous drain current per channel, 8 channels independently controlled, an operating supply range suitable for 12 V automotive rails, integrated protection features (open-load detection, short-to-ground detection, over-load shutdown, and per-channel thermal shutdown), a serial-peripheral-interface (SPI) for programming and diagnostics, and IN1–IN4 parallel inputs that can override the SPI register in pairs. The 24-pin SSOP package has a thermal resistance of approximately 67 C/W and is qualified to automotive grade. Typical applications include driving automotive relays, solenoids, lamps, and LEDs in body-control modules, junction boxes, instrument panels, and HVAC blower controls. Its parallel-IN override also enables hardware-only operation in safety-critical or pre-boot stages where the SPI master is not yet active. When designing with the NCV7240DPR2G, ensure adequate thermal copper under the SSOP exposed thermal area to dissipate worst-case 8-channel on-state loss, and bypass the logic and VCC pins with 100 nF ceramics placed within 3 mm of each pin. The combination of SPI diagnostics and parallel-IN override provides robust operation across both normal communication-driven and fail-safe fallback control modes. This datasheet, pricing, and drop-in compatibility synthesis were compiled from multiple distributor and manufacturer sources not aggregated on any single distributor page. It is intended as an engineering supplement to the manufacturer datasheet, not a substitute for the original.
NCV7685DQR2G - 12-Ch 60mA LED Linear Driver, I2C, Automotive | onsemi
The onsemi NCV7685DQR2G is a 12-channel linear constant-current LED driver with 60 mA per channel and I2C programmable PWM dimming, housed in a 24-pin SSOP-EP package with exposed thermal pad. Designed for automotive lighting regulation, it integrates twelve programmable current sources sharing a common reference and supports 128 duty-cycle steps per output with independent channel control. The device operates from a wide supply range typical of automotive 12 V/24 V systems and communicates via a standard I2C serial interface for configuration and diagnostics. A linear LED driver (also called linear current regulator or LED constant-current sink) is a class of power management IC that regulates the current flowing through each LED string by dissipating the excess input-to-LED voltage as heat on a linear regulator element. Linear LED drivers belong to the broader category of LED drivers, which sit inside power management semiconductors and are valued for their low EMI signature because they do not switch at high frequency like buck/boost converters. This makes linear drivers ideal for applications where conducted and radiated noise must be minimized, such as automotive rear-combination lamps, instrument clusters, and interior ambient lighting. Key features of the NCV7685DQR2G include twelve 60 mA current sinks with shared reference, 128-step PWM dimming per channel, I2C addressable control, integrated thermal protection, and a PWM frequency that can be programmed through the serial interface. Each channel can be independently enabled or disabled and assigned its own duty cycle, enabling per-LED brightness control for animation effects. The device supports open-circuit, short-circuit, and over-temperature fault reporting through the I2C status registers. Architecturally, the IC combines twelve matched low-side current mirrors with a single internal bandgap reference, providing channel-to-channel current matching within a tight tolerance suitable for uniform brightness across multi-LED strings. The SSOP-EP package with exposed pad provides a low thermal resistance path, allowing higher total dissipation at elevated ambient temperatures typical of underhood and lamp-housing environments. Typical applications include automotive rear lamps (tail, brake, turn), daytime running lights, interior ambient lighting, instrument-panel backlighting, and status indicators where individual LED brightness control and fault diagnostics are required. It is also used in body-control modules and BCM-driven lighting subsystems. A key design consideration is total power budget: at 60 mA per channel with all 12 channels active at full current, headroom voltage on each channel becomes heat. Designers should compute worst-case (VIN - VLED) x Iout and verify junction temperature against the SSOP-EP thermal resistance to avoid thermal shutdown. A trade-off versus switching LED drivers is lower EMI but higher dissipation. This page synthesizes distributor pricing, drop-in same-package equivalents, and engineering design notes not found in the manufacturer datasheet alone.
NCV8730ASN500T1G - 150mA 38V LDO, 5.0V Fixed, TSOP-5 | onsemi
The onsemi NCV8730ASN500T1G is a 150 mA CMOS low-dropout (LDO) linear regulator with a fixed 5.0 V output, 38 V maximum input voltage, and 1 µA quiescent current, housed in a 5-pin TSOP (TSOP-5 / SOT-23-5 equivalent) package and qualified to AEC-Q100 for automotive applications. The device is engineered for always-on, battery-powered systems where a wide input range and ultra-low standby current are required, and it integrates a Power-Good (PG) open-drain output for rail monitoring and power-sequencing tasks. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage. Within the broader system hierarchy, an LDO belongs to the family of linear regulators, which in turn sit under voltage regulators, a sub-category of power management integrated circuits (PMICs). Unlike switching regulators, an LDO dissipates the voltage difference (VIN − VOUT) × IOUT as heat, but it introduces no switching noise, making it ideal for analog, RF, and microcontroller supply rails. Key features of the NCV8730ASN500T1G include the 38 V absolute-maximum input rating, 1 µA typical quiescent current (per the onsemi NCV8730 datasheet), a Power-Good flag that asserts when the output is in regulation, and built-in protections such as current limit and thermal shutdown. The CMOS architecture provides fast transient response to sudden load steps, and the 5-pin TSOP package keeps the PCB footprint compact for space-constrained modules. Architecturally, the NCV8730 uses a PMOS pass element driven by a precision bandgap reference, and the fixed 5.0 V variant (denoted "SN500" in the ordering code) eliminates external feedback resistors. The PG comparator monitors the output and pulls the open-drain PG pin low if VOUT falls below approximately 92% of nominal, which a host MCU or sequencer can use to detect brown-out conditions. Typical applications include automotive body electronics and sensor modules, industrial battery-powered instrumentation, IoT and smart-sensor nodes, low-power microcontroller rails, and standby power rails in energy-harvesting systems. The wide VIN range also makes it suitable for 12 V/24 V automotive buses post-protection. When designing with this part, place input and output ceramic capacitors as close as possible to the pins and keep the PG pull-up resistor value low enough to meet the required rise time. Designers should also evaluate the worst-case power dissipation (PD = (VIN − VOUT) × IOUT) to confirm the TSOP-5 thermal envelope is not exceeded. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the NCV8730ASN500T1G that are not found in the manufacturer datasheet alone.
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.
NJM2835DL1-05-TE1 - 500mA 5V LDO Regulator | Nisshinbo
The Nisshinbo Micro Devices NJM2835DL1-05-TE1 is a 500 mA low-dropout (LDO) linear voltage regulator with a fixed 5.0 V output in a TO-252-3 (DPAK) surface-mount package. According to the Mouser listing for the part, the device features a 45 uVrms noise floor, 75 dB ripple rejection, a 0.18 V typical dropout, and is stable with only a 2.2 uF ceramic output capacitor. The 5.0 V fixed output variant is supplied in tape-and-reel packaging and operates over a wide input voltage range up to 15.5 V. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage - the so-called dropout condition. As a subclass of linear regulators, LDOs sit within the broader category of voltage regulators, which themselves fall under power management ICs (PMICs). LDOs are preferred over switching regulators in noise-sensitive analog, audio, RF, and sensor signal-chain applications because they add no switching ripple to the rail, at the cost of dissipating extra energy as heat when VIN is significantly higher than VOUT. The NJM2835DL1-05-TE1 uses advanced bipolar technology from the NJM2835 family to deliver low noise and high ripple rejection in a small form factor. Internal protection includes current limit, thermal shutdown, and the built-in noise bypass capacitor that allows the 45 uVrms noise specification without an external bypass network. The TO-252-3 (DPAK) package provides a drain-tab thermal pad for board-level heat spreading, and the 2.2 uF minimum ceramic output capacitor requirement supports compact designs. Typical applications include post-regulation after a DC-DC switching converter in noise-sensitive subsystems, 5 V supply rails for microcontrollers, sensors, and audio codec analog sections, USB-powered devices, point-of-load regulation on industrial 12 V/24 V backplanes, and consumer appliances where a clean 5 V rail is required from a higher-voltage bus. The wide input range also makes it usable on 12 V automotive subsystems (cold-crank tolerant within datasheet limits). When designing with this part, observe the dropout limit at maximum load (a 500 mA load at low VIN approaches dropout when VIN approaches 5.05 V). Place the input and output capacitors close to the IC body to ensure stability and minimize output impedance at high frequency.
NJM2882F05-TE1 - 300mA LDO Regulator, 5V Fixed, SOT-23-5
The Nisshinbo Micro Devices NJM2882F05-TE1 is a 300 mA low-dropout (LDO) linear voltage regulator with a fixed +5.0 V output, packaged in a 5-pin SOT-23-5 (MTP5) surface-mount outline. It delivers 75 dB ripple rejection at 1 kHz and 30 µVrms output noise, accepting input voltages up to 14 V and integrating ON/OFF control, short-circuit protection, and over-temperature protection. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only marginally above the output. Within the broader power management hierarchy, an LDO sits beneath DC-DC converters and standard linear regulators, providing cleaner, lower-noise rails at the cost of dissipating (VIN - VOUT) × IOUT as heat. The NJM2882 belongs to the LDO family, itself a sub-category of linear regulators and ultimately of power management ICs. Key features include a typical dropout of 180 mV at 100 mA, a low 1.0 µF output capacitor requirement for stability, and a quiescent current of 180 µA. The fixed +5.0 V output eliminates external resistor dividers, simplifying BOM and layout, while the active-high enable pin supports power sequencing and standby modes. Advanced bipolar technology achieves the combination of low noise and high PSRR demanded by handheld and portable equipment. The bipolar process architecture trades slightly higher quiescent current versus CMOS LDOs for superior noise and ripple rejection at audio frequencies. Combined with a 300 mA load capability in a 2.8 × 2.9 mm MTP-5 footprint, the device is well-suited for space-constrained designs where clean power is mandatory and PCB real estate is at a premium. Typical applications include portable consumer electronics, USB-powered peripherals, audio codec and headphone amplifier rails, microcontroller supply in battery chargers, and industrial sensor modules. Any system requiring a clean 5 V rail from a higher-voltage source such as a Li-ion cell, 9 V wall adapter, or 12 V bus is a strong candidate for the NJM2882. When designing with this part, ensure the input voltage remains above the dropout threshold plus 5 V across all load and line transients, and use a low-ESR 1.0 µF or greater ceramic capacitor on the output within a few millimetres of the VOUT pin for stable regulation. This page synthesizes distributor pricing, drop-in alternatives within the SOT-23-5 footprint, and practical design notes drawn from the Nisshinbo datasheet - information not consolidated on the manufacturer product page alone.
NJM7815FA - 15V 1.5A Positive 3-Terminal Regulator | Nisshinbo
The Nisshinbo Micro Devices NJM7815FA is a monolithic 3-terminal positive fixed-voltage linear regulator delivering 15 V at up to 1.5 A in an isolated TO-220F (3-pin + tab) through-hole package. As a member of the legacy NJM7800 series, it integrates the pass transistor, bandgap reference, and protection circuitry on a single bipolar die constructed with the New JRC Planar epitaxial process. A linear voltage regulator (also called an LDO when operated near dropout, or simply a 3-terminal regulator in this fixed-output form) is a device that maintains a constant DC output voltage from a higher, often noisy DC input. It sits within the power-management IC hierarchy between discrete Zener-diode regulators and fully integrated switching converter modules, and the NJM7800 family occupies the high-current (>0.5 A) tier of that hierarchy. Key specifications include a fixed 15 V output, 1.5 A maximum load current, 2 V typical dropout, and internal thermal overload, short-circuit, and safe-area protection. The bipolar architecture provides excellent line and load regulation, low output impedance, and high ripple rejection at audio frequencies, while the isolated TO-220F tab simplifies PCB mounting by eliminating the need for an insulating washer. Typical applications include 15 V op-amp analog rails in audio equipment, industrial control boards, instrumentation power supplies, and any subsystem that requires a clean, stable positive rail above the standard 12 V supply level. The device also serves as a building block in linear post-regulation stages following switching pre-regulators. When using this part, ensure that the input-to-output differential stays above the dropout voltage at full load, and that the power dissipation stays within the TO-220F thermal limits. The isolated tab simplifies chassis-mount heatsink attachment without extra insulation hardware. This page consolidates distributor stock, parametric drop-in equivalents in the TO-220F footprint, and practical design notes that complement the manufacturer datasheet.
NJM7915FA - -15V 1.5A Negative LDO Regulator TO-220F | NJR
The NJR (Nisshinbo Micro Devices) NJM7915FA is a monolithic 3-terminal negative voltage regulator that delivers a fixed -15 V output at up to 1.5 A, housed in an isolated TO-220F (3-pin + tab) through-hole package. Built on NJR's planar epitaxial process, the part is the negative-polarity companion to the popular 78xx positive LDO family and is intended for split-supply analog, op-amp, and audio circuits that require a clean negative rail. Key specifications include 1.5 A continuous output current, fixed -15 V output with ±4% tolerance, internal current-limit and thermal-shutdown protection, and a typical line/load regulation suitable for op-amp AVDD rails. A negative linear regulator (also called a negative LDO or negative 3-terminal regulator) is a type of voltage regulator that produces a stable negative output voltage relative to ground from a more-negative input rail. In the power-management IC hierarchy, the NJM7915FA sits below adjustable switching controllers and above simple Zener shunts, occupying the same product category as the LM7905, LM7912, and LM7915 from Texas Instruments. The device replaces discrete resistor-Zener or op-amp-based negative references with a single drop-in IC, saving PCB area and improving temperature coefficient. Because output polarity is fixed at -15 V, the regulator is commonly paired with a +15 V (NJM7815FA) device to create ±15 V analog supplies. The most important feature of the NJM7915FA is its high 1.5 A output current in a TO-220F isolated package, which allows direct mounting to a heatsink without an insulating washer when the tab is internally isolated. Additional features include internal short-circuit current limiting, thermal shutdown at approximately 150 °C junction, low quiescent current compared to older LM79xx designs, and excellent ripple rejection because the part uses the same bandgap reference architecture as NJR's 78xx series. The TO-220F (FA suffix) variant provides full isolation between the metal tab and the die, simplifying mechanical assembly and reducing the risk of tab-to-ground shorts during production. In application, the NJM7915FA is typically placed after a transformer-rectifier-capacitor bulk filter and provides a regulated -15 V rail for op-amps, DACs, ADCs, instrumentation amplifiers, and audio preamplifiers. Designers should add a 0.33 µF input capacitor and a 0.1 µF output capacitor (tantalum or low-ESR ceramic) close to the IC, plus adequate heatsinking when VIN-VOUT differential exceeds 5 V at high load. As of 2026-10-09 distributor pricing puts the part at roughly $0.75-$1.20 in 1-piece quantity and under $0.50 at 1k reels. Designers should consider the power dissipation budget carefully: at 1.5 A load with VIN = -20 V and VOUT = -15 V, dissipation is 7.5 W and a heatsink is mandatory. The isolated TO-220F tab allows direct mounting to a grounded chassis without an insulating pad. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet. Engineers comparing the NJM7915FA to cross-brand 7915 regulators will find a side-by-side parametric comparison below.
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.
NJU39610D2 - Dual 7-bit DAC Stepper Motor Controller | DIP-22 | NJR
The Nisshinbo Micro Devices NJU39610D2 is a microstepping motor controller with dual 7-bit+sign digital-to-analog converters (DACs), housed in a 22-pin DIP (D2) through-hole package designed to pair with the NJM3771 precision stepper motor driver. The part provides two independent reference-rail DACs that deliver sinusoidal full-step/microstep current profiles to the dual H-bridge driver, enabling smooth low-vibration motion in two-phase bipolar stepper systems. A microstepping controller is a specialized mixed-signal IC that converts digital position commands (typically from an 8-bit microcontroller such as the 6800/8051/Z80 family) into dual analog reference voltages that command the current setpoint of each motor phase. By dividing each full step into smaller microsteps through precise analog current control, microstepping dramatically reduces resonance, audible noise, and torque ripple compared with full-step or half-step excitation. The NJU39610 family sits in the motion-control hierarchy between a host processor and a power H-bridge driver such as the NJM3771, ultimately controlling a brushless DC or two-phase bipolar stepper motor. Key features include dual 7-bit+sign DACs for two independent phase current references, parallel 8-bit microprocessor-compatible data bus interface (compatible with 6800, 6801, 8051, Z80, and similar families in 8-bit data mode), TTL-compatible inputs (except reset), and a -20°C to +85°C commercial operating temperature range. The on-chip dual DAC architecture eliminates external trim and matching of discrete references, simplifying the analog signal chain while preserving monotonicity across the full output swing. Architecturally the NJU39610D2 combines CMOS digital logic for host interfacing and sequencing with precision bipolar DAC cores, allowing low-power operation from a single 5 V nominal supply while producing accurate current setpoints. The device is specified for office-automation and industrial equipment duty cycles where predictable microstep accuracy over temperature is required. Through-hole DIP-22 packaging supports legacy industrial designs, breadboarding, and field-replacement scenarios where socketed ICs are preferred over surface-mount alternatives. Typical applications include office-automation printers and plotters, CNC and pick-and-place equipment, factory automation positioning stages, textile and packaging machinery, medical instrumentation positioning, and robotic actuator control. The NJU39610D2 is most often paired with the NJM3771 driver to complete the analog control loop for 2-phase bipolar stepper motors. When designing with this device, ensure the host microcode initializes the DAC latches before energizing the motor and follow the timing diagrams for /CS, /WR, and the two address pins exactly to avoid spurious phase current updates. Decouple VCC with a 0.1 µF ceramic capacitor placed within 10 mm of the supply pin and keep analog ground returns short and isolated from digital switching currents.
NJW4107U2-33A-TE1 - 45V 300mA Fast LDO 3.3V Fixed | Nisshinbo
The Nisshinbo NJW4107U2-33A-TE1 is a 45V-rated, 300 mA fast-transient-response low-dropout (LDO) linear regulator with a fixed 3.3 V output, packaged in a 5-pin SOT-89-5 (U2 suffix). It operates from 4.0 V to 40 V input, supports an On/Off control pin, and offers output voltage accuracy of ±1.0% at 25 °C and ±1.5% across the full -40 °C to +125 °C automotive temperature range. The wide VIN range and AEC-Q100 Grade 1 qualification (T1 specifier) make it a robust choice for harsh-environment rails. What is an LDO (Low-Dropout) linear regulator? An LDO is a class of linear voltage regulator that maintains a regulated output voltage even when the input voltage is only marginally higher than the output - the minimum differential is the "dropout voltage." LDOs sit within the broader taxonomy of linear regulators, then voltage regulators, then power-management ICs in the semiconductor hierarchy. Unlike switching regulators, LDOs introduce no switching noise but dissipate VIN-VOUT times IOUT as heat, so they are favored for noise-sensitive analog and RF rails where clean supply is more important than efficiency. Key features include a wide 4.0 V to 40 V operating input range (transient-tolerant to 45 V), a 300 mA continuous load capability, an On/Off (enable) pin for power sequencing, internal current limit and thermal shutdown, and a low quiescent current optimized for always-on standby rails. The fast transient response specification is the headline differentiator over general-purpose LDOs. Internally, the device combines a high-side P-channel pass element with a precision bandgap reference and error amplifier. The architecture achieves fast line/load transient response by minimizing the dominant pole at the pass transistor gate, allowing the output to recover quickly from load steps - critical for digital logic rails that draw large dynamic currents. Typical applications include automotive body electronics and sensor rails, industrial PLC I/O and 24 V-bus post-regulation, battery-powered portable equipment, and 12 V/24 V industrial sensor power. Designers choose the NJW4107U2 family when a wide VIN, fixed output, and fast transient response are required in a small SOT-89-5 footprint. When designing with this part, place input and output ceramic capacitors as close to the pins as possible, respect the SOA at high VIN-VOUT differentials (derate at elevated Ta), and use the On/Off pin for power sequencing in multi-rail systems. The exposed die-pad of the device (L2 suffix variants) further improves thermal dissipation versus standard SOT-89-5. This page synthesizes distributor pricing, drop-in alternative coverage, and practical design notes not found in the manufacturer datasheet alone, giving engineers a faster path from MPN selection to qualified BOM.
NJW4132U2-A - 40V 1.75A Boost Converter IC | Nisshinbo
The Nisshinbo Micro Devices NJW4132U2-A-TE2 is a 45V-tolerant, 1.75A output current boost (step-up) switching regulator IC integrating a 40V power MOSFET in a compact SOT-89-5/6 surface-mount package. It operates from a wide 4.5V to 40V input range and produces an adjustable output from 1V up to ~38V, making it well suited for industrial 24V/28V bus rails and battery-powered systems that must be boosted above the supply voltage. A boost converter (also called a step-up switching regulator) is a switching power topology that uses an inductor, a power switch, and a rectifier diode to deliver an output voltage higher than the input. The NJW4132U2-A falls within the broader DC-DC switching regulator category (DC-DC > switching regulator > boost converter > PMIC) and is intended for applications where the input must be raised to a higher rail without the heat penalty of a linear regulator. Compared with a linear LDO, a boost converter trades lower efficiency for much smaller size and far less heat dissipation at high VIN-to-VOUT ratios. Key features include 45V absolute maximum input rating, 1.75A internal MOSFET current capability, high switching frequency that allows the use of small low-ESR MLCC output capacitors, integrated soft-start, cycle-by-cycle overcurrent protection, thermal shutdown, and an enable/shutdown pin for power sequencing. The exposed-pad SOT-89-5/6 footprint keeps the part area minimal while providing adequate thermal dissipation for sub-3W designs on a 1-square-inch copper pour. Typical applications include driving strings of white LEDs from a 12V or 24V rail, biasing industrial sensors from a 24V PLC supply, generating local 15V or ±12V rails from a single-cell Li-ion pack, and supplying LCD bias generators in point-of-sale and metering equipment. The wide input range also supports USB-PD and automotive 12V battery systems. When designing with the NJW4132U2-A, place the input capacitor, output capacitor, boost inductor, and catch diode as close to the IC as possible, and follow the manufacturer recommended land pattern to keep switching-node copper area short and quiet. Keep the feedback traces away from the SW node and use the EN pin to control inrush and standby current.
NJW4132U2-A-TE2 - 40V 1.75A Boost Converter | Nisshinbo Micro Devices
The Nisshinbo Micro Devices NJW4132U2-A-TE2 is a 45V-tolerant, 1.75A peak-current boost (step-up) switching converter IC with an integrated low-RDS(on) N-channel MOSFET, housed in a compact SOT-89-5/6 surface-mount package. It accepts a wide 4.5V to 40V input range, supports adjustable output voltages from 1V upward (set by external feedback resistor), and operates at high switching frequency with low-ESR MLCC support on the output - making it ideal for space-constrained industrial and automotive subsystems. What is a boost converter? A boost converter is a switching DC-DC converter topology that produces an output voltage higher than its input. In the broader power management hierarchy, it sits under DC-DC converters, which themselves belong to power management ICs (PMICs). Boost converters use an inductor, switch, diode, and output capacitor to store and release energy, achieving efficiencies typically 80-95% that far exceed linear regulators when VIN is significantly below VOUT. Key features of the NJW4132U2-A-TE2 include: 1.75A internal switch current, wide VIN 4.5V to 40V, high-frequency operation enabling small external LC components, MLCC-compatible output, integrated 45V MOSFET for derating transistor strength, built-in overcurrent protection, thermal shutdown, and an enable/standby pin. The SOT-89-5/6 package provides an exposed tab for thermal dissipation and occupies a footprint suitable for handheld and panel-mount designs where board area is at a premium. The NJW4132U2 uses peak-current-mode PWM control with internal compensation, providing stable transient response across line and load variations. The wide 40V input withstand capability allows direct connection to 12V or 24V industrial battery rails, while the high-side drive architecture and internal 45V MOSFET derating protect against inductive switching transients. According to the Nisshinbo Micro Devices datasheet, the converter maintains regulation across the full input range and offers cycle-by-cycle current limiting. Typical applications include industrial 24V bus boost to 36V/48V rails, automotive bias supplies from 12V battery to logic-level rails, LED backlight boost converters for panel displays, and battery-powered portable instruments. The wide input range particularly suits 12V/24V lead-acid battery systems where cold-crank transients and load-dump surges exceed normal operating voltage. When designing with this device, derate the internal MOSFET at high VIN - the 45V rating provides margin against load-dump transients in 24V automotive systems. Place the input capacitor close to the IC and use a Schottky rectifier with low reverse recovery to maximize efficiency. According to the Nisshinbo datasheet, the feedback resistor divider should use 1%-tolerance parts for output voltage accuracy. This page synthesizes distributor pricing, drop-in SOT-89-5 same-brand alternatives (NJW4132U2-B-TE2, NJW4132U2-C-TE2 family variants), and practical design notes not found in the manufacturer datasheet.
NJW4132U2-CT1-TE1 - 45V/1.75A 2MHz Boost Converter | Nisshinbo
The Nisshinbo Micro Devices NJW4132U2-CT1-TE1 is a 45V/1.75A current-mode boost (step-up) switching regulator IC housed in a compact SOT-89-5/6 surface-mount package. It operates from a wide 4.5V to 40V input range, integrates a 45V/1.75A power MOSFET, and switches at a fixed 2.0 MHz oscillation frequency that supports small ceramic output capacitors. The output voltage is externally adjustable, with the standard variant tracking a 1V reference, and the device delivers up to 2.25A of switch current per the distributor catalog listings. A boost (step-up) converter is a type of switching DC-DC converter that produces an output voltage higher than its input voltage. Boost converters belong to the broader switching regulator family, which also includes buck (step-down), buck-boost, and SEPIC topologies. Within the power management hierarchy they sit between the linear regulator (low noise, low VIN-VOUT headroom) and the charge-pump (low power, simple architecture). High-frequency switching regulators like the NJW4132 enable small magnetics and ceramic output capacitors, replacing the bulky electrolytics required by older converters running at 100 kHz to 500 kHz. Key features include the 2 MHz switching frequency that minimizes passive component footprint, integrated 45V power switch that withstands automotive load-dump transients, ceramic output capacitor compatibility for low-ESR designs, and built-in protections (overcurrent, thermal shutdown, undervoltage lockout) per the manufacturer datasheet. The 4.5V to 40V input range covers 5V, 12V, 24V, and 36V industrial bus rails. The NJW4132U2 uses peak-current-mode control architecture with internal slope compensation, providing stable loop response across a wide range of load and line conditions. The 2 MHz oscillator and small SOT-89-5/6 package allow single-sided PCB assembly in space-constrained applications. The high 45V switch rating supplies designs that must ride through load-dump pulses on 12V or 24V automotive buses. Typical applications include bias supplies for LCD/OLED display panels, point-of-load (POL) regulators after a 12V or 24V bus, LED backlight drivers, battery-powered industrial equipment, and energy-harvesting power conditioning. The wide VIN range and small footprint make it particularly attractive for body-electronics and metering end nodes. When designing with this part, ensure the inductor saturation current exceeds the 1.75A peak switch rating, and place input capacitors close to the IC to minimize switching noise. The thermal pad of the SOT-89-5/6 package requires adequate copper to keep junction temperature below the 150C maximum under worst-case load. This page synthesizes distributor stock and pricing, drop-in same-package alternatives, and practical thermal design notes that supplement the manufacturer's datasheet and help shorten the design review path.
NJW4181U3-05B - 100mA 5V 35V LDO Regulator SOT-89-3 | NJR
The Nisshinbo Micro Devices (formerly New Japan Radio / NJR) NJW4181U3-05B is a high-input-voltage, low-quiescent-current 5V fixed positive-output LDO linear regulator that delivers up to 100 mA from a wide 6.7 V to 35 V input rail and is offered in the SOT-89-3 (U3) surface-mount package. Its three key parameters are 5.0 V fixed output, 100 mA maximum load, and a 9 uA typical quiescent current. An LDO (Low-Dropout) linear regulator is a DC voltage regulator that holds its output nearly constant even when the input-to-output differential approaches the minimum headroom the device needs to stay in regulation. LDOs sit under the broader hierarchy of linear regulators, which in turn belong to the family of voltage regulators and ultimately the power management IC category that supplies clean rails to analog, digital, and mixed-signal subsystems. Unlike switching regulators, an LDO does not switch - it dissipates (VIN - VOUT) * IOUT as heat - and therefore adds no switching noise to the supply, which is the principal reason LDOs are favored for low-power analog bias, sensor excitation, and always-on reference rails. The NJW4181U3-05B distinguishes itself with a 9 uA typical quiescent current and 20 uA maximum quiescent current, an input withstand of 35 V (well above the 24 V industrial bus voltage), 625 mW power dissipation, and an integrated current limit plus thermal shutdown. Its high PSRR across the audio band keeps switching-supply ripple out of downstream analog stages. The part is RoHS compliant, ships in a SOT-89-3 footprint with an exposed tab that doubles as the ground/heat-spreading pad, and is targeted at always-on industrial sensor nodes, metering, and automotive accessory rails where input transients can swing high. Architecturally, the NJW4181U3 series uses a PNP pass element topology that yields a low dropout of roughly 0.2 V at 40 mA, a precision bandgap reference, and CMOS control logic. Because there is no enable pin, the regulator is on whenever VIN exceeds the turn-on threshold of about 6.7 V. Designers must respect the 35 V absolute-maximum input rating and provide adequate PCB copper on the SOT-89-3 tab to keep junction temperature within the 150 C maximum at the worst-case VIN/VOUT/IOUT combination. Typical applications include 24 V industrial sensor biasing, battery-powered metering that draws microamps of standby current, microcontroller and op-amp supply rails in HVAC controls, automotive body-electronics accessory power, and post-regulation cleanup for switching converters feeding analog front-ends. The combination of low Iq, high VIN, and a tiny SOT-89-3 footprint makes it well suited for sealed or space-constrained modules. When designing with this part, observe the SOT-89-3 PCB layout guideline of using the exposed tab as both electrical ground and primary thermal path; 1 oz copper pours of roughly 100 mm^2 keep theta_JA in the 100 C/W range for 1 W dissipation. Bypass with a 1 uF ceramic input capacitor and a 1-10 uF ceramic output capacitor for stability across the full load range. This page synthesizes distributor pricing, drop-in alternatives in the SOT-89-3 footprint, and practical design notes not found in the manufacturer datasheet, all derived from sources verified as of 2026-10-09.