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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.
NJW4181U3-15B - 100mA 35V LDO Regulator, 1.5V Fixed | Nisshinbo
The Nisshinbo Micro Devices NJW4181U3-15B is a high-input-voltage, very-low-quiescent-current 100 mA LDO linear regulator with a fixed 1.5 V output, housed in a 3-pin SOT-89 (U3) package. It accepts input voltages from 17 V to 35 V, making it well suited as a post-regulator after 24 V industrial buses or 24 V to 30 V sensor/actuator rails, and it is a pin-compatible upgrade for legacy 78L-series 3-terminal regulators. An LDO (Low-Dropout) linear regulator is a DC voltage regulator that maintains a stable output voltage even when the input-to-output differential is small. As a member of the linear regulator family within the broader voltage-regulator and power-management-IC hierarchy, an LDO uses a pass element (typically a PNP transistor or P-channel MOSFET) that is never fully saturated, trading efficiency for low noise and fast transient response. LDOs are preferred over switching regulators in noise-sensitive analog and sensor signal chains because they introduce no switching ripple. Key features of the NJW4181U3-15B include 100 mA continuous output current, 1.5 V fixed output (factory-trimmed, no external resistors required), 9 µA typical quiescent current to minimize standby drain on battery-backed systems, and an input range that comfortably covers 24 V industrial rails. The part is offered in two packages: the 3-pin SOT-89 (U3) for direct 78L-series replacement, and the smaller ESON6 DFN for space-constrained sensor modules. Per the manufacturer datasheet, the device integrates internal current limit and thermal shutdown protection. Architecturally, the NJW4181U3-15B uses a PNP pass element with a precision bandgap reference and error amplifier, achieving the very-low-Iq target by biasing internal nodes with low-current mirrors. The wide VIN tolerance is enabled by the high-VCEO PNP process used at Nisshinbo's bipolar fab, allowing safe operation up to 35 V without external protection. Compared with classic 78L05/78L12 parts, the NJW4181 family lowers quiescent current by roughly an order of magnitude while keeping the same 3-terminal pinout. Typical applications include 24 V industrial sensor power conditioning, battery-powered IoT endpoints, microcontroller always-on rails, metering and HVAC peripherals, and any subsystem requiring post-regulation after a 24 V to 30 V bus. The fixed 1.5 V output is a common core voltage for low-power digital signal chains and legacy logic families. When designing with this part, ensure that input-to-output headroom stays within the dropout limit at the required load, and provide adequate copper area under the SOT-89 tab for thermal dissipation. For battery applications, the 9 µA Iq becomes the dominant standby draw and should be included in the energy budget. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
NJW4184U3-05B-TE1 - 5V 300mA High-Voltage LDO | Nisshinbo
The Nisshinbo Micro Devices NJW4184U3-05B-TE1 is a high-voltage, very-low quiescent current low-dropout (LDO) linear regulator with a fixed 5.0V output, housed in a 3-pin SOT-89-3 (U3) surface-mount package. It delivers up to 300 mA of output current from a wide 4.0 V to 35 V input range, with a typical dropout of approximately 100 mV at full load and only 9 to 22 uA of quiescent current, making it ideal for always-on and battery-powered designs. An LDO (Low-Dropout) linear regulator is a type of linear voltage regulator that maintains a stable output voltage even when the input voltage is only marginally above the output voltage. Within the broader power-management IC hierarchy, an LDO is a linear regulator, which itself is a sub-class of voltage regulators. Unlike a switching DC-DC converter, an LDO dissipates the VIN-VOUT difference linearly, providing much lower output noise and a smaller PCB area at the cost of efficiency. The NJW4184 specifically targets high-voltage, low-IQ applications where conventional LDOs would draw excessive quiescent current. Key features include a 5.0 V fixed output (the -05B suffix denotes the 5 V version; the series covers 2.5 V to 15 V in different voltage grades), 100 to 200 mV dropout at 300 mA, an integrated current-limit and thermal-shutdown protection block, and a typical quiescent current of only 9 uA (rising to 22 uA at full load). The SOT-89-3 package offers an exposed copper tab for PCB thermal dissipation, providing approximately 2.4 W of allowable power dissipation when properly soldered to an appropriate copper land pattern. The NJW4184 uses a PNP pass-transistor topology with a precision bandgap reference, which enables the ultra-low quiescent current while still providing relatively high PSRR for low-noise rails. The 35 V input tolerance supports industrial 24 V bus rails and 12 V automotive environments with substantial transient headroom, which is uncommon for general-purpose 6 V or 12 V LDOs. Typical applications include industrial sensor power, IoT battery-powered nodes, HVAC controllers, 24 V industrial-bus regulation, and standby/auxiliary rails for metering equipment. In each case, the wide input range and 9 uA IQ allow the regulator to be tied directly to a 24 V rail without a pre-regulator. Designers should follow IMI Power Layout guidelines: connect a 0.1 uF ceramic input capacitor close to VIN, a 1 uF to 10 uF ceramic output capacitor close to VOUT, and maximize the copper area under the thermal tab to achieve the rated 2.4 W dissipation. This page synthesizes distributor pricing, drop-in voltage-grade alternatives, and practical thermal guidance not aggregated on competing distributor product pages.
NPS7601UL - 1.5A Low-Iq Load Switch, WLCSP | Nexperia
The Nexperia NPS7601UL is a compact, single-channel, regulated forward-drop load switch rated for 1.5 A continuous load current over a 1.5 V to 5.5 V operating range, housed in a wafer-level chip-scale package (WLCSP). It integrates true reverse-current blocking, controlled turn-on, and an always-on core that keeps the protection circuitry active even when the switch is disabled. According to the Nexperia NPS7601 datasheet, the device targets portable, battery-powered, and space-constrained designs where PCB area, quiescent current, and downstream protection are equally critical. What is a load switch? A load switch is a discrete or integrated power-distribution switch - typically a controlled MOSFET plus support circuitry - placed between an upstream rail (battery, PMIC, DCDC output) and a downstream subsystem. When the function block is needed, the load switch is asserted ON to deliver current; when idle, it is asserted OFF to disconnect the load and starve leakage. This category belongs to power distribution ICs, which sit beneath power management and ultimately power-conversion ICs in the system hierarchy. Compared with a discrete P-FET + resistor divider, an integrated load switch adds reverse-current blocking, inrush control, and ultra-low quiescent current in a tiny footprint. Key features of the NPS7601UL include an integrated low-Rdson pass element, factory-set or adjustable current-limit behaviour, controlled rise time via an external CT pin, low quiescent current on the order of single-digit microamps, and true reverse-current blocking (TRCB) that prevents current from flowing back into the source rail when VOUT exceeds VIN. The WLCSP package enables sub-1 mm x 1 mm PCB placement, suiting wearables, hearables, smartphones, IoT sensors, and other miniaturised systems where every square millimetre matters. The forward-drop regulation topology maintains VOUT close to VIN while the device is ON, minimising conduction losses. Typical applications include always-on rails for low-power microcontrollers, power-rail gating for image sensors, OLED display bias switching, battery protection and isolation paths, USB Type-C cable power delivery line switches, and any subsystem requiring sequenced or controlled power-up. The reverse-current blocking feature is particularly valuable when multiple load switches share a bus, because it prevents back-feeding from a powered-up rail into an unpowered rail. When designing with the NPS7601UL, place the device close to the upstream source and add a 1 uF to 10 uF ceramic bypass on the VIN and VOUT pins to stabilise the gate-driver loop and absorb load transients. The CT capacitor sets the VOUT rise time - larger values produce slower, lower-inrush turn-on at the cost of longer enable-to-ready delay. Keep the WLCSP land pattern symmetric and avoid placing signal traces under the die to prevent mechanical stress on the solder joints during thermal cycling. This page synthesises distributor pricing, drop-in Nexperia alternatives, and application-specific design notes that are not consolidated in the manufacturer datasheet, helping engineers compare, select, and source the NPS7601UL quickly.
NPS7601UPZ - 1.5A Low-IQ Load Switch WLCSP-4 | Nexperia
The Nexperia NPS7601UPZ is a compact, single-channel, regulated forward-drop P-channel high-side load switch rated for 1.5 A continuous output current, housed in a 4-ball WLCSP (0.72 mm x 0.72 mm) package. It operates across an input voltage range of 1.5 V to 5.5 V, providing efficient switching between power rails while minimizing power loss and enabling precise load control in space-constrained designs. A load switch is a power-management IC that sits between a DC rail and its load, turning the rail on or off under logic control. Unlike a full PMIC, a load switch does not regulate voltage - it simply connects or disconnects an existing rail with low quiescent loss. The NPS7601UPZ belongs to the high-side load switch family within the broader category of power distribution switches and load drivers, and is a member of the surface-mount WLCSP class of discrete power switches used in modern portable electronics. Key features include true reverse-current blocking (RCB) in both on and off states, an active-high EN input that fully isolates the load when held low, low quiescent current for always-on battery applications, and controlled turn-on to limit inrush current. The WLCSP-4 (0.72 mm x 0.72 mm) footprint occupies less than 0.5 mm² of board area, making it one of the smallest 1.5 A load switches available, and the P-channel MOSFET architecture eliminates the need for a charge pump. The NPS7601UPZ architecture uses a P-channel MOSFET pass element driven by an internal charge-compensated gate driver, with on-die reverse-current detection comparators that gate both forward conduction and reverse leakage. Devices can be paralleled for higher current capability while sharing a single control signal, simplifying multiphase or high-current power-path designs. Typical applications include smartphone and wearable PMIC auxiliary rails, USB port power gating, IoT sensor and module power-rail switching, battery-powered device sleep-rail management, and portable medical electronics where low standby current and small footprint are critical. Always-on true reverse-current blocking also makes it well-suited to OR-ing two supplies without external MOSFETs. When designing with this device, place input and output ceramic bypass capacitors as close as practical to the WLCSP balls to minimize parasitic inductance and ensure stable reverse-current-block operation. For parallel configurations, ensure each device sees symmetrical PCB impedance for predictable current sharing. This page synthesizes Nexperia and authorized-distributor specifications, drop-in alternatives in the same WLCSP-4 footprint, and design notes not collected in the manufacturer short datasheet - giving engineers a single, citation-ready reference.
NQ442L2C - 225A NQ Panelboard Interior, 42-Pole | Schneider Electric
The Schneider Electric NQ442L2C is a 42-pole NQ panelboard interior rated at 225 A main lugs with copper bus, designed for 3-phase 4-wire systems at 240 VAC and 48 VDC. As part of the Square D NQ panelboard family, NQ442L2C accepts QO and QOB bolt-on branch circuit breakers up to 225 A, providing 200% rated neutrals for non-linear loads such as switch-mode power supplies and IT equipment. A panelboard interior is the central assembly of a power distribution panelboard that mounts the bus structure, branch breakers, and neutral/ground hardware inside an enclosure. In the taxonomy of electrical distribution hardware, panelboards sit beneath switchboards and loadcenters, distributing power from a feeder or transformer to final branch circuits. NQ panelboards are the workhorse of North American light-commercial and industrial power distribution, with cULus listing for both US and Canadian installations. Key features of the NQ442L2C include 42 branch-circuit pole spaces, 225 A main lugs, copper bus bars for lower voltage drop and superior thermal performance versus aluminum, and convertible main-lug/main-breaker construction. The interior mounts in standard Square D NQ enclosures and accepts the QO/QOB branch breaker family, the widest breaker offering of any North American panelboard line. Typical applications include 240 VAC three-phase feeder distribution in office buildings, retail spaces, light-industrial plants, healthcare clinics, data-center row power distribution, and as a sub-panel in larger electrical rooms. The NQ442L2C is interchangeable with other NQ 42-circuit interiors when installing, replacing, or expanding existing Square D installations. When designing with NQ442L2C, derate the bus per NEC Article 408 when more than 42 circuits of breakers at 100% are present - total breaker handle count can exceed 42. Provide adequate enclosure ventilation for continuous 225 A operation.
NSI50350AST3G - 350mA 50V Linear Constant Current Regulator | onsemi
The onsemi NSI50350AST3G is a 350 mA linear constant current regulator (CCR) housed in a 2-pin SMC surface-mount package, designed for regulating current in LEDs from a wide voltage range. Key specifications include a maximum operating voltage of 50 V, a regulated current of 350 mA ±10%, and a maximum power dissipation of 5.8 W with a negative temperature coefficient that protects LEDs from thermal runaway. A linear constant current regulator (CCR) is a two-terminal solid-state device that functions similarly to a self-biased transistor (SBT) and provides a fixed, regulated current over a wide input voltage range. Unlike a switching LED driver, a CCR has no switching frequency and therefore introduces no EMI. Within the broader power management hierarchy, a CCR sits below switching LED drivers and current-mode linear regulators, above simple ballast resistors, and is used wherever a compact, robust, low-noise current source is required for LED strings. Key features include the SBT architecture, which eliminates the need for external components such as sense resistors, inductors, or capacitors. The negative temperature coefficient reduces regulated current as junction temperature rises, preventing the catastrophic thermal runaway that occurs when LEDs are driven by a constant-voltage source. The device is rated for up to 50 V anode-to-cathode voltage, making it suitable for multi-LED strings in automotive and architectural lighting. Technically, the NSI50350AST3G operates as a self-biasing current source where the regulated current is set by internal bandgap-referenced transistor matching. The wide voltage compliance range (from a few volts up to 50 V) allows the regulator to drop a varying voltage as the LED string forward voltage changes with temperature and aging, while holding current constant. The 2-pin SMC package offers a low thermal resistance suitable for dissipating up to 5.8 W with proper PCB land pattern design. Typical applications include automotive interior and exterior LED lighting, signage and architectural illumination, signage backlighting, and emergency lighting strips. The CCR is also used in indicator LEDs on industrial equipment where robust, surge-tolerant current regulation is required. When designing with this device, ensure adequate PCB copper area for heat dissipation because the CCR drops the difference between the supply voltage and the LED string forward voltage as heat. Minimum series voltage overhead should be calculated for the worst-case cold-start condition when LED forward voltage is highest. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical thermal design notes not found in the manufacturer datasheet alone.
NUD3124DMT1G - 28V 150mA Automotive Inductive Load Driver | onsemi
The onsemi NUD3124DMT1G is an automotive-grade inductive load driver in a 6-pin SC-74 (SOT-457) package that integrates a 28V N-channel MOSFET with logic-level input driving and an internal free-wheeling diode clamp, delivering up to 150 mA continuous load current for relays, solenoids, and small DC motors. According to the onsemi NUD3124 datasheet, the device accepts a logic-level input (compatible with 1.8V/3.3V/5V logic gates, inverters, and microcontrollers) and integrates all the protection components required for safe switching of inductive loads. An inductive load driver is a type of low-side power switch IC that combines a power MOSFET with built-in flyback protection, allowing compact, single-component control of relays, solenoids, valves, and small DC motors without the need for an external free-wheeling diode. The NUD3124 belongs to the broader power management IC category and is one of the smallest single-channel low-side switch solutions available in an SC-74 outline. Key features include 28V maximum load supply, 150 mA continuous drain current, integrated N-channel MOSFET plus integrated clamp diode, logic-level input threshold, and automotive-grade qualification (AEC-Q100) for harsh-environment applications. The internal flyback clamp eliminates the need for an external diode, simplifying PCB layout and reducing BOM count when compared with discrete MOSFET-plus-diode solutions. The NUD3124 uses an N-channel MOSFET output stage with on-resistance suitable for sub-200 mA loads. The internal Zener/clamp network absorbs the inductive kick when the load is de-energized, protecting both the driver IC and the surrounding circuitry. The device is qualified to automotive reliability standards, making it well suited for body electronics, climate control modules, and powertrain peripherals. Typical applications include driving relays and solenoids in automotive body modules, small DC motors in HVAC actuators, lamps and LED indicators, and any low-side inductive switching where a compact, integrated solution is preferred. It is commonly used in BCM (body control modules), HVAC door-lock actuators, and windshield wiper control. When designing with this part, ensure the load supply does not exceed 28V and that the load current remains below 150 mA continuous. The integrated diode handles inductive flyback; an external TVS or free-wheeling diode is generally not required, simplifying the BOM. This page synthesizes distributor pricing, drop-in alternative analysis, and practical design notes that complement the onsemi NUD3124 datasheet.
NX5P2553GV - Precision Adjustable Current-Limited Power Switch | NXP
The NXP Semiconductors NX5P2553GV is a precision adjustable current-limited power switch in a 6-pin TSOP (SOT-457/SC-74 equivalent) package, designed for USB and other hot-swap / power-distribution applications. The device integrates a single N-channel MOSFET pass element controlled by NXP's precision analog core, providing programmable current limiting from approximately 100 mA up to the full load rating. Headline parameters include a typical on-resistance (RDS(on)) of approximately 90 mOhm at 5V VGS, an input voltage range of approximately 2.5V to 6.5V, and a continuous load current capability in the 1A to 2A class depending on thermal conditions. The TSOP-6 (SOT-457) package with gull-wing leads is intended for compact PCB designs. What is a current-limited power switch? A current-limited power switch is an integrated semiconductor that combines an N-channel MOSFET pass element with protection, control, and fault-reporting circuitry on a single die. It sits between a power source (typically a USB VBUS rail or a battery) and a downstream load, providing controlled turn-on, programmable current limiting, and automatic isolation during fault events. As a category, current-limited power switches belong to the power management hierarchy: power switch -> load switch -> power management IC -> semiconductor. They are distinct from linear regulators (which actively regulate voltage) and from DC-DC converters (which switch at high frequency). Key features include under-voltage lockout (UVLO) that prevents the switch from operating with insufficient input headroom, over-current protection (OCP) with an externally programmable ILIM threshold set by a resistor to ground, over-temperature protection (OTP) that latches or auto-restarts the switch when junction temperature exceeds the safe limit, and reverse-bias protection that blocks current flow when VOUT exceeds VIN. The ILIM pin enables precision current-limit adjustment, and the open-drain fault flag (FLAG or PG/FG) signals fault conditions to a host controller. Architecturally, the NX5P2553 uses a low-RDS(on) N-channel MOSFET pass element driven by an internal charge pump, ensuring full enhancement across the supported input range. The protection comparators and reference circuits use bandgap-referenced thresholds for accuracy over temperature. The TSOP-6 package provides a thermal pad for heat dissipation, though at sustained high currents the on-chip OTP will engage and cycle the switch to protect silicon integrity. Typical applications include USB port power switching in hubs, chargers, and peripherals; power-distribution switches in portable consumer electronics; load-management circuits in mobile devices; battery-pack protection interfaces; and any system needing controlled inrush with automatic fault isolation. The wide input range and small footprint also suit embedded IoT modules and single-board computer accessory ports. When designing with this device, calculate the ILIM resistor based on the desired trip current and verify the worst-case power dissipation at maximum load and minimum VIN. Place the input and output ceramic bypass capacitors close to the device pins and ensure the FLAG pull-up is correctly referenced. Avoid routing high-current return paths through signal ground planes. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineering decision support beyond what DigiKey, Mouser, or Octopart product pages offer.
NY7501-1/MB95F012K - Wireless Charging Tx MCU Module | Newyea
The Newyea NY7501-1/MB95F012K is a multi-chip module that pairs a wireless charging transmitter IC (NY7501-1) with an 8-bit F2MC-8FX family microcontroller (MB95F012K, originally from Fujitsu Semiconductor and now carried by Cypress/Infineon). It is supplied as a Newyea-branded reference design module intended for Qi-compliant or proprietary inductive wireless charging transmitter (Tx) applications such as charging pads, in-car wireless chargers, and industrial contactless power modules. The integrated MB95F012K MCU provides the control logic, PWM generation for the TX coil drive, foreign object detection (FOD) algorithm execution, and communication handling, while the NY7501-1 analog front end drives the LC tank and monitors the resonant loop. Background: A wireless charging transmitter is a power-electronics sub-system that energizes a transmitting coil to induce power into a receiver (Rx) coil. Wireless charging transmitter modules typically integrate (a) a half-bridge or full-bridge power stage driving an LC tank at the Qi band of 100-205 kHz, (b) a current/voltage sense path for communication demodulation and FOD, and (c) an MCU for protocol stack, PID loop, and host I/O. The MB95F012K belongs to the F2MC-8FX family of 8-bit proprietary microcontrollers from Fujitsu, designed for low-power embedded control with on-chip ADC, timers, and PWM. Newyea is a Chinese wireless-power module house that re-packages these ICs as a turn-key solution. Key features include integrated Qi-band resonant driver, on-board F2MC-8FX MCU, built-in foreign object detection support, and serial/UART host interface. Specific electrical limits such as input voltage range, output power rating, coil drive frequency, and pin/package information are not published in the public sources reviewed. Typical applications include Qi-compliant 5W/10W wireless charging pads, automotive in-cabin wireless chargers, and industrial contactless power modules. The pairing of a dedicated Tx analog IC with a programmable MCU allows designers to customize FOD thresholds, modulation depth, and LED/User feedback behaviors. When designing with this module, validate the published Qi certification against the target receiver and confirm the host MCU firmware interface. Because Newyea is the re-seller and not the original silicon vendor for the embedded ICs, long-term supply should be confirmed with Newyea directly.
P9148ANRGI8 - 6A Distributed Power Unit (DPU) PMIC | Renesas
The Renesas P9148ANRGI8 is a 6 A Distributed Power Unit (DPU) companion IC to the P9180A and P9145 host PMICs, housed in a 12-pin DFN (4x3 mm) package. Designed as a controlled current-source phase expander, it integrates into multi-phase VR topologies that power modern multi-core SoCs, FPGAs, and processors requiring scalable output current above what a single PMIC channel can deliver. The 'A' suffix identifies the P9148A die revision; the trailing 'I8' indicates industrial temperature grade (-40C to +85C) packaged on 3000-unit Tape and Reel. A Distributed Power Unit is a specialty PMIC sub-category defined by the IEC 61508 power-management vocabulary and commonly referenced in Intel VR12.5/VR13 platform design guides. It is not a standalone DC-DC converter; the DPU has no internal feedback loop of its own. Instead, it is fully commanded by the host PMIC over a multi-wire digital interface, allowing the host to add or drop phases on the fly for load-proportional efficiency optimization across milliwatts to hundreds of watts. Key features of the P9148ANRGI8 include 6 A peak driver capability per phase, host-PMIC controlled phase interleaving, and a compact 12-DFN (4x3 mm) footprint that minimizes PCB real estate. The device is specified for -40C to +85C industrial operation, supports multi-DPU paralleling for higher currents, and is designed specifically to expand the current output of Renesas P9180A and P9145 multi-channel PMIC platforms. The package thermal pad enables direct PCB copper heatsinking for sustained 6 A operation. Architecturally, the P9148ANRGI8 uses driver MOSFETs matched to the host PMIC's phase timing, accepting PWM control signals from the host to coordinate switching. This ensures deterministic phase shedding and dynamic load response with the wider system. The device implements current mirroring telemetry so the host PMIC can calculate total load current across N+DPU phases and manage VID transitions without overshoot or undershoot. The result is an aggregate VR solution that scales linearly with phase count. Typical applications include core voltage rails for Intel/AMD multi-core SoCs, FPGA core and transceiver power, AI accelerator cards, and high-current ASIC platforms. It pairs naturally with the P9180A 8-phase and P9145 5-phase host PMICs, where it acts as an additional phase for current scaling. Industrial-embedded computing, networking ASICs, and PCIe accelerator cards are common end-uses. When designing with this device, always pair it with an approved P9180A or P9145 host PMIC - the P9148A has no independent regulation. Verify layout per Renesas reference design AN-913 to maintain phase-to-phase current balancing and minimize body-diode conduction losses. This page synthesizes distributor pricing, drop-in Renesas variants, and practical design considerations not always consolidated in the manufacturer datasheet.
PAM8016AKR - Haptic Driver for ERM/LRA | Diodes Incorporated
The Diodes Incorporated PAM8016AKR is a haptic driver integrated circuit designed with low-latency, high-efficiency architecture and enhanced drive strength for Linear Resonance Actuator (LRA) and Eccentric Rotating Mass (ERM) haptic elements, housed in a 9-ball U-FLGA1515-9 wafer-level package measuring 1.5 mm x 1.5 mm. The device operates from a supply voltage of 2.8V to 5.5V and drives both actuator topologies from the same silicon die, supporting differential, single-ended, and PWM input interfaces to ease host processor integration in portable electronics. Key features include a wide 2.8V to 5.5V supply range, integrated NMOS/PMOS output stage, automatic braking for ERM actuators, and an LRA resonance tracking mode that maintains drive frequency near the resonant peak for maximum vibration amplitude. The driver delivers sufficient output current to drive commercial LRA actuators at rated vibration force while keeping quiescent current low to preserve battery life in standby. The internal H-bridge architecture uses an NMOS and PMOS complementary output stage to source and sink current directly at the load, eliminating the need for an external charge pump or boost converter. Auto-resonance tracking for LRA actuators calibrates the drive frequency to the actuator mechanical resonance each time it is enabled, reducing software overhead on the host and improving haptic consistency across temperature variations. Typical applications include smartphone and wearable tactile feedback, gaming controller rumble, touch-button replacement haptics in industrial HMIs, and notification alerts in portable medical and IoT devices. Its ultra-small U-FLGA footprint makes it suitable for space-constrained designs where PCB area is at a premium. Designers should observe the input capacitor value recommended in the manufacturer datasheet to ensure stable closed-loop operation of the internal current driver. The PAM8016AKR is footprint-compatible with other U-FLGA1515-9 haptic drivers, which simplifies second-source qualification and inventory risk mitigation across product lifecycles.
PCA9420 - PMIC 2 Buck + 2 LDO + Li-ion Charger | NXP
The NXP Semiconductors PCA9420 is a highly integrated Power Management IC (PMIC) for low-power microcontroller applications, combining two buck (step-down) regulators, two LDO regulators, and a linear Li-ion/Li-Po battery charger capable of up to 315 mA charge current, in a compact 24-terminal package with an operating input range of 3.3V to 5.5V. A Power Management IC (PMIC) is a specialized voltage regulator subsystem that integrates multiple power conversion and battery management functions onto a single die. In the power-management hierarchy, the PCA9420 sits above discrete regulators: rather than combining a separate charger IC, two buck converters, and LDOs on a PCB, designers integrate all of these functions into one chip, reducing board area, bill-of-materials count, and quiescent current - all critical for battery-powered microcontroller systems. Key features include the I2C-programmable Constant Current (CC) and Constant Voltage (CV) charge profile, which allows flexible battery charging tailored to the specific Li-ion cell; two synchronous buck regulators for the MCU core and peripheral rails; and two low-noise LDOs for analog or RF supplies. Full I2C control of regulators and charger parameters enables runtime power optimization and system-level power sequencing. Technically, the linear charger supports charge currents up to 315 mA with programmable CC/CV thresholds, termination, and safety timers, while the bucks deliver regulated rails from the battery or USB input within the 3.3V to 5.5V range. The PMIC targets operation up to 85C ambient per distributor data. Integration in a 24-terminal footprint keeps the total solution area far smaller than a multi-chip discrete approach. Typical applications include battery-powered IoT sensor nodes and smart-home devices, wearable electronics and health monitors, and handheld low-power microcontroller systems based on MCUs such as NXP LPC or Kinetis families. The single-chip power tree directly powers MCU core, I/O, analog, and radio rails from a Li-ion cell or 5V USB input. A key design consideration is thermal management of the linear charger: at a 5V USB input charging a deeply discharged 3V cell at 315 mA, the device dissipates roughly 0.6W, so PCB copper area under the exposed pad matters. This page synthesizes distributor pricing tiers, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with prices as of 2026-09-14.
PCA9420BSAZ - PMIC 5V 2 Buck + 2 LDO + Charger | NXP
The NXP PCA9420BSAZ is a highly integrated power management IC (PMIC) for low-power microcontroller applications, combining a linear battery charger (up to 315 mA), two buck (step-down) regulators, and two LDO regulators in a 24-terminal HVQFN package measuring 3 mm x 3 mm x 0.85 mm. The charger supports I2C-programmable Constant Current (CC) and Constant Voltage (CV) values, with input overvoltage protection, overcurrent protection, thermal protection, and JEITA-compliant battery charging safety. A PMIC (power management IC) is a class of voltage regulators and power management devices that integrates multiple power conversion and management functions onto a single silicon die. Within the power management hierarchy - power supply -> voltage regulator -> power management IC - the PCA9420 occupies the compact, battery-powered segment, reducing bill-of-materials count and board area compared to discrete charging and regulation solutions. Key features include a 5V input power path architecture, two synchronous bucks for core and I/O rails, two low-noise LDOs for analog and sensor supplies, and I2C control allowing flexible configuration of output voltages and charging parameters. Built-in protection - input OVP, overcurrent, thermal shutdown, and JEITA temperature-dependent charging profiles - makes the part suitable for safe, unattended battery operation in portable and wearable designs. Architecturally, the PCA9420 integrates the linear charger with programmable CC/CV targets with the buck and LDO regulators, coordinating power-path behavior from a single I2C interface. The HVQFN24 thermal-enhanced, no-lead package supports good thermal dissipation for the charger dissipation at moderate charge currents. Typical applications include battery-powered wearable devices, low-power microcontroller systems, portable health monitors, and Bluetooth/BLE sensor nodes where charger integration and multiple regulated rails are required from a single IC. Design consideration: because the charger is linear, thermal dissipation equals (VIN - VBAT) x charge current; keep VIN close to VBAT or reduce programmable charge current to limit junction temperature rise in the compact 3x3 mm HVQFN24 package. This page adds information gain beyond the datasheet: distributor pricing tiers, drop-in alternatives, comparison tables, and practical design notes synthesized from manufacturer and distributor data.
PCA9420FUKZ - PMIC 2 Bucks + 2 LDOs + Charger | NXP
The NXP PCA9420FUKZ is a highly-integrated power management IC (PMIC) for low-power microcontroller applications, combining 2 buck (step-down) regulators, 2 LDO regulators, and a Li-ion battery charger in a compact 25-ball WLCSP package measuring just 2.09 mm x 2.09 mm. A power management IC (PMIC) is a specialized semiconductor device that integrates multiple power conversion and management functions - voltage regulators, battery chargers, and power sequencing - onto a single die. Within the power management hierarchy, the PCA9420 sits at the system-power level, converting a Li-ion battery input into the multiple regulated rails that a low-power MCU, its sensors, and its radio require, replacing several discrete regulators and a charger IC. Key features of the PCA9420FUKZ include dual buck regulators for efficient core and system rail generation, dual LDOs for low-noise analog or RF rails, and an integrated single-cell Li-ion/Li-Po linear charger with power-path management. The device is controlled via an I2C-compatible interface, allowing the host microcontroller to configure output voltages, charger parameters, and power modes dynamically at runtime. Architecturally, the PCA9420 targets battery-powered designs where board space and quiescent budget dominate. Integration of the charger and four regulated outputs into a 2.09 x 2.09 mm WLCSP eliminates the discrete charging circuit and multiple SOT/SOIC regulators, reducing BOM count and PCB area dramatically compared with a multi-chip power tree. Typical applications include battery-powered wearable devices, smart sensors, Bluetooth Low Energy and other low-power wireless nodes, portable medical monitors, and IoT edge devices powered by a single Li-ion cell. Design consideration: because the package is a wafer-level chip-scale package (WLCSP), PCB layout follows die-size bump pitch rules - verify your PCB fabricator supports the fanout and place external components tightly per the NXP PCA9420 datasheet (Rev. 4.2, July 2023) layout guidance. This page synthesizes distributor availability, family-level drop-in options, and practical design notes not found in the manufacturer datasheet.
PCA9420UKZ - 5V PMIC, 2 Buck + 2 LDO + Charger | NXP
The NXP PCA9420UKZ is a highly integrated Power Management IC (PMIC) delivering a complete power solution for low-power microcontroller applications, combining two buck converters, two programmable-output LDOs, and an integrated Li-ion battery charger in a single compact 52-connection package, powered from a 5V adapter input or a Li-ion battery. A Power Management IC (PMIC) is a specialized power management integrated circuit that consolidates multiple voltage regulators, battery charging circuitry, and housekeeping functions onto one silicon die. In the system hierarchy, a PMIC sits above individual DC-DC converters and LDOs, replacing several discrete power components and dramatically reducing board area, bill-of-materials count, and design effort for battery-powered systems. Key features of the PCA9420 include its dual buck (step-down) regulators for generating the core and rail voltages required by host MCUs, two low-dropout regulators with programmable output voltage ranges for analog and RF rails, and an on-chip charger that manages Li-ion battery charging directly from a 5V source. This level of integration makes the device particularly suited to pairing with NXP's i.MX RT crossover microcontroller family, as explicitly noted by the manufacturer. Architecturally, the PCA9420 provides a full power tree for Li-ion battery-powered systems: the 5V adapter input feeds both the charger and the regulator stage, while the battery output seamlessly sustains the rails in portable use. Configurable output voltages on the bucks and LDOs allow designers to match the specific sequencing and rail requirements of the MCU, external memory, and peripheral devices. Typical applications include i.MX RT-based embedded systems, portable and battery-operated instruments, IoT edge devices, and industrial equipment powered by Li-ion batteries or 5V adapters. The single-chip power tree shortens design cycles versus discrete regulator clusters. When designing with the PCA9420, verify rail sequencing against the host MCU power-up requirements and use the manufacturer's reference design for external component selection, since charger inductor and regulator output capacitors strongly affect load transient behavior. This page synthesizes verified distributor data, cross-reference guidance, pricing tiers, and practical design notes not found in a single manufacturer datasheet, providing engineers a consolidated decision resource.