Power Management
Subcategories
Products (2,800+)
MC34VR500V1ES - 9-Output PMIC for QorIQ LS1/T1 | NXP
The NXP MC34VR500V1ES is a high-performance, highly integrated multi-output DC/DC regulator for the QorIQ LS1/T1 family of communications processors, integrating four switching buck regulators and five linear regulators (LDOs) in a 56-pin QFN-EP (8x8 mm) package. It provides up to 4.5 A on its highest-current buck output and includes user-programmable output voltages, switching frequency, and turn-on sequencing via I2C, eliminating external resistor dividers and complex MCU control loops. The device operates from a 3.1 V turn-on threshold and supports input voltages consistent with 3.3 V/5 V system rails, with integrated power MOSFETs to minimize external component count and PCB area. A PMIC (Power Management IC) is a system-level integrated circuit that consolidates multiple voltage rails - typically buck switching converters for high-current loads and LDOs for low-noise analog rails - into a single package, replacing dozens of discrete regulators. PMICs reduce BOM count, simplify PCB layout, improve power-up sequencing determinism, and shrink solution footprint for processor-based designs. They are widely used in networking, communications, and embedded computing platforms where multiple coordinated rails are required. Key features include a quad-buck topology with integrated high-side and low-side MOSFETs, triple user-programmable LDOs with external feedback support, I2C-programmable output voltages and switching frequency, programmable power-up sequencing, and four operating modes (ON, OFF, Sleep, Standby). Built-in protection covers over-voltage, under-voltage, over-current, and thermal shutdown. The 56-QFN-EP package provides a thermal pad for efficient heat spreading under sustained 4.5 A loads. Typical applications include the NXP QorIQ LS1/T1 communications processors powering routing, switching, and SoC platforms, DDR memory rails, gigabit Ethernet PHYs, and general-purpose networking infrastructure. The PMIC architecture also suits industrial control boards and small-form-factor networking appliances requiring tightly-sequenced multi-rail power. When designing with the MC34VR500V1ES, follow NXP's reference layout in the manufacturer datasheet for the SW node, input/output capacitors, and exposed pad soldering to maximize thermal performance. Use the I2C registers to set output voltages precisely - do not rely on default settings unless the application rails exactly match them.
MC34VR500V8ES - Quad Buck + 5 LDO PMIC for QorIQ | NXP
The NXP MC34VR500V8ES is a highly integrated multi-output DC/DC regulator (PMIC) designed specifically for the QorIQ LS1/T1 family of communications processors, integrating four switching buck regulators and five user-programmable LDOs into a single 56-pin QFN-EP (8x8 mm) package. It delivers up to 4.5 A on the main buck output and provides all rails required by the processor core, DDR memory, and system peripherals. Output voltage, switching frequency, and turn-on sequence are user-programmable via I²C, enabling a single-chip power solution that shrinks BOM count and simplifies board layout. A PMIC (Power Management IC) is a highly integrated power supply ASIC that combines multiple voltage regulators (switching buck converters and low-dropout linear regulators), supervisory functions, and digital control into one package. PMICs are widely used in networking processors, SoCs, and FPGAs where multiple independent voltage rails must be generated, sequenced, and dynamically scaled in response to load or operating mode changes. They sit at the top of the power management hierarchy: PMIC > multi-channel regulator > DC/DC converter + LDO > power management. Key features include four integrated buck converters with internal MOSFETs, five user-programmable LDOs with adjustable output, adjustable current limiting on each rail, adjustable soft-start, dynamic voltage scaling (DVS), light-load efficiency mode, power-on sequencing control, and I²C programmability. The device is qualified to automotive temperature range (-40 °C to +105 °C), making it suitable for harsh industrial and automotive networking environments. The MC34VR500V8ES uses SMARTMOS technology from NXP's automotive-grade mixed-signal process. Internal power MOSFETs are sized for the 4.5 A peak buck output, eliminating external switches. Closed-loop digital trimming via I²C allows output setpoints to be tuned at ATE or in-system. Built-in protections include overcurrent protection (OCP), thermal shutdown, and undervoltage lockout. Typical applications include QorIQ LS1/T1 communications processor platforms, industrial networking switches/routers, automotive telematics and gateway ECUs, smart-grid/industrial control, and any multi-rail SoC system requiring tightly-sequenced power-up. Pairing this PMIC with a QorIQ LS1021A or T1024 processor provides a single-supply power solution. When designing with this part, follow NXP's reference design for proper inductor selection, output capacitor choice, and PCB layout of the exposed pad (EP). The EP must be soldered to a sufficient ground copper pour for thermal dissipation. I²C programming must follow the MC34VR500 register map exactly, including write-protect unlocking before any register modification. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet, including automotive grade comparison and cross-reference guidance for hard-to-source NXP PMICs.
MC3PHACVDW - 3-Phase AC Motor Controller | NXP Semiconductors
The NXP Semiconductors MC3PHACVDW is a high-performance monolithic intelligent motor controller designed for low-cost variable-speed 3-phase AC motor control systems. Housed in a 28-pin SOIC (DW) surface-mount package, it integrates the control logic required to drive a 3-phase IGBT inverter from a single +5 V supply, with motor-side rails handled by the external IGBT bridge. An AC motor controller is an intelligent motor-driver IC that synthesizes Pulse-Width Modulation (PWM) waveforms to vary the stator frequency and amplitude of an induction or permanent-magnet AC motor. It sits below the microcontroller or sensorless estimator in the control hierarchy of a variable-frequency drive (VFD): the host micro issues speed/torque commands, the controller generates the six-step or sinusoidal PWM that switches the IGBT bridge, and the link between the low-voltage logic and the high-voltage power stage is sealed inside the 28-SOIC. The MC3PHACVDW belongs to a family that historically targets fan, pump, and small compressor drives in white goods and HVAC. Key features include a 4.5 V to 5.5 V single logic supply, an on-chip DSP-style computation block for sensorless or open-loop V/Hz control, programmable acceleration/deceleration ramps, and configurable PWM switching frequency. The device supports direct interface to an external 3-phase IGBT module and includes integrated dead-time generation to prevent shoot-through across the high- and low-side transistors of the inverter bridge. The architecture combines an 8-bit MCU-style core with a hardware PWM engine and analog comparators. Communication with the host is serial, allowing the part to be re-tasked for different motor profiles without firmware changes. Operating temperature range is -40 °C to 105 °C, suiting industrial-grade enclosures and IPM-style heat-sunk assemblies. Typical applications include consumer and industrial variable-frequency drives for fans, pumps and compressors, HVAC blowers, washing-machine direct-drive motors, and small 3-phase induction-motor inverters in home-appliance white goods. The integrated control block removes the need for a dedicated DSP in low-cost designs. A design consideration is that the MC3PHACVDW only generates logic-level PWM; the 28-SOIC cannot drive the IGBT gates directly at full motor current. A gate-driver IC (for example the NXP MC33035 family or the FAN7380) plus a separate IGBT bridge rated for the motor's bus voltage is required to complete the inverter. This page synthesizes distributor pricing, 3-phase VFD design notes, and parametric comparison against equivalent motor controllers not found on a single manufacturer datasheet page.
MC3PHACVDWE - 3-Phase AC Motor Controller, 4.5-5.5V, 28-SOIC | NXP
The NXP MC3PHACVDWE is a high-performance monolithic intelligent motor controller designed for low-cost, variable-speed, 3-phase AC motor control systems, integrating an 8-bit MCU core with 8KB of FLASH/OTP memory and a serial interface in a 28-pin SOIC wide-body package. It operates from a 4.5V to 5.5V supply, supports AC synchronous motor types, and provides pre-driver outputs configured as three half-bridges for direct drive of an external IGBT inverter stage. An intelligent motor controller (IMC) is a specialized mixed-signal IC that combines an embedded microcontroller, analog sensing, and gate-driver logic into a single device. In the power-management hierarchy, an IMC sits between a discrete MCU plus gate-driver pair and a fully integrated motor power module (IPM). Its primary role is to reduce the BOM count, PCB area, and firmware development effort for variable-frequency drives (VFDs) targeting low-voltage three-phase motors. Key features of the MC3PHACVDWE include a dedicated 3-phase PWM generation block, commutation and direction management for AC synchronous motors, on-chip fault protection, and an 8-bit CPU with 8KB of embedded FLASH/OTP that holds the user's motor-control firmware. The 28-SOIC wide-body (WSOIC-28) package provides ample creepage for the low-voltage analog section while remaining compatible with standard SMT assembly lines. Architecturally, the device uses an HC08-derived 8-bit core, three high-resolution timer channels for center-aligned PWM, on-chip 10-bit ADC channels for back-EMF and current sensing, and hardware fault inputs for overcurrent and bus undervoltage. Its three half-bridge pre-drivers interface directly to discrete IGBTs or power MOSFETs, allowing designers to scale the inverter power stage independently of the controller. Typical applications include low-cost washing-machine motors, refrigerator compressors, HVAC fans, small pumps, and industrial 3-phase variable-frequency drives operating from a 110/220 VAC rectified bus stepped down to 5V logic. The integrated controller dramatically reduces time-to-market compared to MCU-plus-software solutions. When designing with the MC3PHACVDWE, ensure that the 5V supply rail is well-decoupled with at least 10uF bulk plus 100nF ceramic capacitors, and that the pre-driver outputs are sized correctly for the gate charge of the chosen external IGBTs. The on-chip OTP memory is one-time programmable, so plan firmware revisions carefully. Designers should also budget sufficient creepage distance on the PCB between the low-voltage logic section and the IGBT high-voltage bus. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet to help procurement and design engineers evaluate the MC3PHACVDWE for new variable-frequency drive designs.
MC3PHACVPE - 3-Phase AC Motor Controller, HC08, 8KB, DIP-28 | NXP
The NXP MC3PHACVPE is a high-performance monolithic intelligent motor controller designed specifically for low-cost variable-speed 3-phase AC motor control systems. It integrates an HC08 8-bit CPU core with 8KB of Flash/OTP program memory on-chip, three half-bridge IGBT pre-drivers, and serial-communication peripherals in a single 28-pin PDIP through-hole package, operating from a 4.5V to 5.5V supply. The architecture adapts to its environment through firmware configuration rather than external analog tuning, enabling cost-effective BLDC and PMSM designs without external gate-driver ICs or dedicated PWM controllers. What is a monolithic 3-phase AC motor controller? It is a single-chip device that combines a microcontroller core with power-stage gate drivers specifically engineered to commutate 3-phase brushless motors. By placing the CPU, PWM timer, ADC inputs, fault logic, and three half-bridge gate drivers on one die, the designer eliminates 5 to 10 discrete components compared to a discrete MCU-plus-driver solution, lowering BOM cost and shrinking PCB area for appliance-class and light-industrial variable-frequency drives. The MC3PHACVPE belongs to the broader motor-driver category that sits hierarchically between signal-level microcontrollers and high-voltage power converters in a typical motor-control system. Key features include three independent IGBT gate drivers capable of sourcing/sinking sufficient gate charge to drive external IGBT half-bridges, an integrated HC08 core running at up to the documented clock-frequency rating, 8KB of embedded Flash/OTP for application firmware, and an asynchronous serial (SCI/UART) port for command and telemetry. The chip targets direct-through-hole assembly on a single-sided or double-sided PCB with through-hole 28-pin PDIP packaging, simplifying thermal and mechanical integration in cost-sensitive volume manufacturing. The technical core is built around an Freescale-developed HC08 8-bit architecture with on-chip program memory. The power-output stage uses three paired complementary gate-drive signals with adjustable dead-time insertion logic. Host systems typically load the application profile (motor parameters, acceleration curves, current trip points) into the on-chip memory and issue torque/speed commands via UART, after which the MC3PHACVPE performs closed-loop commutation autonomously. Typical applications include consumer washing-machine variable-frequency drives, refrigerator compressors, HVAC blowers, ceiling fans, pool and spa pumps, and small industrial fans. The combination of on-chip Flash/OTP, integrated IGBT drivers, and DIP-28 packaging makes it ideal for high-volume white-goods motor control where BOM minimization outweighs raw computational throughput. When designing with this controller, verify the external IGBT module's gate-charge requirement against the MC3PHACVPE driver's specified drive current, place the analog-sensing feedback decoupling network close to the IC supply pins, and verify that the host MCU's UART is configured at the correct baud (and at the documented logic level) to avoid spurious commutation commands during boot. This page synthesizes drop-in alternative MPNs in the same 28-PDIP through-hole footprint, parametric trade-offs versus competing 3-phase motor-driver ICs, and practical PCB layout guidance drawn from the manufacturer datasheet that distributor catalog pages typically do not surface.
MC7812CD2TR4G - 1A 12V Fixed Linear Regulator | onsemi
The onsemi MC7812CD2TR4G is a fixed 12 V, positive linear voltage regulator rated for 1 A output current and packaged in a three-pin D2PAK surface-mount package. It is designed for local, on-card regulation where a stable 12 V rail is required from a higher DC input. The device combines straightforward three-terminal regulation with internal current limiting, thermal shutdown, and safe-area protection, making it suitable for industrial, consumer, and communications equipment. A fixed linear regulator is a type of voltage regulator that passes current from input to output while maintaining a predetermined voltage with very low switching noise. Unlike a DC-DC converter, it does not intentionally switch energy between storage components, so it is useful when ripple and simplicity matter more than conversion efficiency. The MC7800 family belongs to the linear-regulator and power-management IC hierarchy, providing local regulation close to the load. The MC7812CD2TR4G provides a fixed 12 V output and 1 A current capability. Its three-terminal D2PAK package supports surface-mount assembly and includes a tab connected to the output-related thermal path. Internal protection functions help limit fault current and prevent excessive heating, although the final thermal design must still account for the input-to-output voltage difference and load current. Because linear regulation dissipates power as heat, the most important design tradeoff is efficiency versus noise and circuit simplicity. At a 15 V input and 1 A load, the regulator must pass approximately 3 V across the device, producing about 3 W of dissipation before accounting for other losses. This makes the package tab and PCB copper area important for maintaining safe operating temperature. Typical applications include 12 V local rails in industrial control equipment, consumer electronics, instrumentation, communications equipment, and power-supply modules. The fixed 12 V output also makes the device suitable for legacy boards requiring a direct replacement for a conventional three-terminal regulator. When selecting a substitute, verify voltage, current, pin arrangement, thermal package, and operating-temperature requirements rather than relying only on the nominal output voltage. This page combines verified distributor information, manufacturer-linked documentation references, application guidance, and drop-in replacement considerations. The listed alternatives are limited to same-footprint candidates identified from the supplied comparison data; engineers should still verify electrical tolerances, thermal limits, and production qualifications before substitution.
MC78FC30HT1 - 3V 50mA Micropower LDO Regulator SOT-89 | onsemi
The onsemi MC78FC30HT1 is a fixed positive 3.0 V output micropower low-dropout (LDO) linear voltage regulator delivering up to 50 mA in a compact SOT-89-3 surface-mount package. It is part of the MC78FC00 series designed for use as a power source for video instruments, handheld communication equipment, and battery-powered equipment. The regulator operates across a 2 V to 10 V input range with a typical 500 mV dropout. 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. Unlike switching regulators, an LDO dissipates the difference between input and output as heat and adds no switching noise. Within the power management hierarchy, the LDO sits below DC-DC converters and above simple shunt regulators as a clean, low-noise point-of-load supply, typically used after a switching pre-regulator to remove ripple for analog and RF circuits. Key features of the MC78FC30HT1 include ultra-low quiescent current for battery-powered applications, integrated thermal protection, fixed 3.0 V output eliminating external feedback resistors, and a small SOT-89-3 footprint. Internal current limit and short-circuit foldback protect the device in fault conditions, while the SOT-89-3 package provides a low-profile surface-mount form factor with good thermal dissipation for the 50 mA load level. Technically, the MC78FC30HT1 uses a low-Iq PNP-pass architecture with an internal bandgap reference, achieving ultra-low quiescent current suitable for always-on battery systems. The 500 mV typical dropout at 50 mA allows the regulator to maintain regulation down to roughly 3.5 V input when powered from a single lithium cell discharging toward cutoff. Typical applications include portable video instruments, handheld communication equipment such as two-way radios and remote controls, single-cell battery-powered devices, microcontroller standby rails, and reference supplies for low-power analog blocks. When designing with this part, ensure input and output capacitors meet the datasheet ESR requirement for stability, and verify that the 50 mA continuous load is never exceeded since the SOT-89-3 package is limited in thermal dissipation. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MC7912BT - 1A Fixed -12V Negative Voltage Regulator TO-220 | onsemi
The onsemi MC7912BT is a 1.0 A fixed-output negative voltage regulator in a 3-pin TO-220 package, delivering -12V nominal output with ±4% tolerance across the 0°C to +125°C junction temperature range. As a member of the MC7900 series, the part is designed as the negative-rail complement to the popular MC7800 positive regulators, sharing the same seven-voltage option set (-5V, -6V, -8V, -9V, -12V, -15V, -24V) for symmetric bipolar power designs. A negative linear regulator (also called an LDO when dropout is low, but the 79xx family is generally classified as a standard linear regulator) is a three-terminal device that maintains a constant negative output voltage relative to ground by dissipating the difference between input and output as heat. These parts sit within the broader power management IC hierarchy: linear regulator -> voltage regulator -> power management IC -> semiconductor. The 79xx family uses a bipolar bandgap reference and pass-transistor architecture with internal current limiting, safe-area compensation, and thermal shutdown. Key features of the MC7912BT include 1.0 A minimum output current, internal short-circuit current limiting, thermal overload protection, and safe-area compensation for the output pass transistor. The TO-220 package provides a tab that serves as the heatsink, allowing the part to dissipate up to the maximum rated power when properly mounted to a PCB copper pad or external heatsink. The MC7900 series is intended for use in post-regulation after a switching converter, local on-card regulation, or as a building block in dual-tracking ±12V or ±15V analog supplies. Typical applications include op-amp negative-rail supplies, analog signal-conditioning circuits requiring bipolar rails, industrial 24V-bus interface boards, and hobbyist electronics using the classic 78xx/79xx pair. When designing with the MC7912BT, ensure adequate heatsinking because dropout voltage (typically ~2V) multiplied by load current results in continuous power dissipation that must be removed from the tab. Although the device does not require an external capacitor for stability in most configurations, an input bypass capacitor placed close to the part reduces input impedance and improves transient response.
MCP121T-270E/TT - 2.63V Voltage Supervisor, 1uA, SOT-23-3 | Microchip
The Microchip MCP121T-270E/TT is a micropower voltage supervisor designed to hold a microcontroller (or any digital host) in reset until the system supply has reached and stabilized at the proper operating level. It monitors a single 2.63 V threshold and asserts an active-low reset output whenever VCC falls below that threshold, then keeps reset asserted for at least 80 ms after VCC has risen back above the threshold. The part is supplied in a tiny 3-pin SOT-23 surface-mount package and consumes only 1.75 µA maximum (1 µA typical) supply current, making it well suited for battery-powered and always-on portable designs. A voltage supervisor (also called a voltage reset IC, POR circuit, or supervisory circuit) belongs to the power management IC family. Voltage supervisors sit between a system power rail and the reset pin of a microcontroller, FPGA, DSP, or ASIC. Their role is to prevent code corruption and latch-up by guaranteeing that the host only begins executing (or resumes executing) when the rail is genuinely valid. The category hierarchy is: voltage supervisor -> supervisory circuit -> power management IC -> semiconductor IC. The MCP121 family is one of Microchip's CMOS-supervisor product lines, optimized for ultra-low quiescent current rather than adjustable threshold flexibility. Key differentiating features include the 1.75 µA maximum quiescent current (per the MCP121 datasheet), an open-drain active-low RESET output that can be pulled up to any rail up to VCC, an internal hysteresis design that rejects brief VCC dropouts, and a fixed 2.63 V threshold variant (other MCP121 thresholds include 3.08 V, 4.38 V, and 4.63 V). The 80 ms minimum reset timeout gives downstream bulk capacitors time to fully charge before the MCU begins to execute code, and the CMOS output stage draws negligible current in either state. Technically, the part is built on a standard CMOS process and uses a precision bandgap reference plus comparator to establish the trip point. The open-drain RESET pin requires an external pull-up resistor to the host's logic rail (commonly 10 kohm to 100 kohm), which allows the reset signal to be translated to a 1.8 V, 3.3 V, or 5 V domain independently of the 2.63 V supervisor rail. This is a useful property when the host MCU operates at a lower logic voltage than the supervisor's monitored rail. Typical applications include microcontroller brown-out protection in battery-powered IoT sensors, smart-watch and wearable PMICs, handheld consumer electronics, fire-alarm and smoke-detector modules, and any 3.3 V Li-ion cell system where a low-current voltage supervisor is needed. The SOT-23-3 footprint and 1 µA Iq also make it appropriate as a redundant supervisor on space-constrained boards. A key design consideration is the choice of pull-up resistor. Because the RESET pin is open drain, the external pull-up determines the rise time of the reset signal and therefore the reset de-assertion behavior. A 10 kohm pull-up is typical; larger values (100 kohm or more) save quiescent current but slow the edge and may need a small capacitor to filter noise. This page synthesizes Microchip MCP121 datasheet specifications, real distributor pricing, drop-in alternative MPNs, and practical design notes that are not duplicated on the manufacturer's PDF.
MCP1321T-20LI/OT - 2.0V Supervisor w/ WDI, SOT-23-5 | Microchip
The Microchip Technology MCP1321T-20LI/OT is a voltage supervisory circuit with a 2.0V precision monitoring trip point, packaged in a 5-pin SOT-23 (OT) surface-mount package on tape-and-reel. It combines an active-low open-drain reset output with an active-high push-pull reset output, a watchdog timer input (WDI), and a programmable reset delay, providing a single-chip brown-out / WDT solution for microcontrollers. The device is part of Microchip's MCP1321 family, which offers trip points from 2.0V to 4.7V in 100 mV increments. What is a voltage supervisor? A voltage supervisor (also called a reset IC, voltage monitor, or microprocessor supervisory circuit) is a power-management IC that monitors a system's supply rail and asserts a reset signal whenever the rail drops below a precise threshold. Supervisors sit between the power supply and the microcontroller's reset pin, complementing internal POR/BOD circuitry with higher accuracy (typically ±1-2%) and additional features such as watchdog timers, manual reset inputs, and complementary reset outputs. They belong to the broader category of power-management ICs and are essential whenever deterministic power-up / power-down behavior is required. Key features of the MCP1321T-20LI/OT include: low supply current (microchip product page lists low-Iq operation), precision 2.0V ±1.5% (typical) trip point, watchdog input time-out of 1600 ms (L-option), reset delay of 200 ms (I-option), and complementary reset outputs. The open-drain /RESET line allows wired-OR connection with other supervisors or push-button reset circuits, while the active-high push-pull RESET drives a standard logic input directly without an external pull-up. Technically, the device integrates a precision bandgap reference, a comparator, a counter for the watchdog timer, and an internal pull-up on /RESET. The WDI input must be toggled by the host MCU within the watchdog window; failure to do so asserts the reset outputs. Reset delay and WDI time-out are decoded from the device suffix (LI = 1600 ms WDI / 200 ms reset). Typical applications include MCU brown-out protection in 3.3V and 5V systems, watchdog supervision of battery-powered sensors, embedded industrial controllers, IoT edge nodes, and any system requiring deterministic power-on reset behavior. Design consideration: the open-drain /RESET pin requires an external pull-up resistor to VDD, while the active-high RESET does not. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes that are not found in the manufacturer datasheet alone.
MCP14A0454T-E/SN - 4.5A Dual MOSFET Gate Driver | Microchip
The Microchip Technology MCP14A0454T-E/SN is a high-speed dual low-side MOSFET gate driver delivering up to 4.5A of peak output current per channel while operating from a single 4.5V to 18V supply. Packaged in an 8-pin SOIC (SN), this tape-and-reel variant features dual non-inverting outputs with matched rise and fall times, making it well suited for driving power MOSFETs and IGBTs in compact power conversion designs. A MOSFET gate driver is a power buffer stage that converts logic-level PWM signals into high-current gate drive signals capable of rapidly charging and discharging the gate capacitance of power semiconductors. Within the power management hierarchy, gate drivers sit between PWM controllers or microcontrollers and power MOSFETs, ensuring fast, clean switching that minimizes switching losses and thermal stress. Low-side drivers such as the MCP14A0454 control transistors referenced to ground. Key features include the 4.5A peak drive current, wide 4.5V to 18V operating supply, low shoot-through current for reduced cross-conduction losses, and matched output impedance for symmetric switching. The low-threshold input logic interface accepts TTL and CMOS signal levels, and the family offers an enable function for power sequencing and shutdown control. According to the Microchip datasheet (DS20005985A), the MCP14A0453/4/5 family shares the same die and package with three output polarity configurations: dual inverting (MCP14A0453), dual non-inverting (MCP14A0454), and complementary (MCP14A0455). Typical applications include switch-mode power supplies (SMPS), motor control circuits, DC-DC converter primary-side switching, Class-D audio amplifier output stages, and general-purpose low-side MOSFET/IGBT driving in industrial and consumer equipment. The dual-channel architecture lets one device drive both switches of a push-pull or half-bridge-referenced stage. Design tip: place a low-ESR ceramic decoupling capacitor (1 uF to 10 uF) directly across VDD and GND to supply the high peak gate currents; otherwise supply sag degrades switching speed and increases EMI.
MCP14A0902-E/MSVAO - 9A MOSFET Driver, MSOP-8 | Microchip
The Microchip Technology MCP14A0902-E/MSVAO is a high-speed, dual-output non-inverting MOSFET gate driver capable of sourcing/sinking up to 9.0 A peak current from a single 4.5 V to 18 V supply, housed in an 8-pin MSOP (MS) package. It is the automotive/VQA-validated (-VAO suffix) variant of the MCP14A0902 family with a low-threshold input stage and an active-high enable pin for sequenced power-up. The non-inverting MCP14A0902 pairs with the inverting MCP14A0901 to provide polarity-flexible half-bridge and synchronous-rectifier drive solutions. A MOSFET gate driver is a specialized power-management IC that sits between a low-power control signal (from a microcontroller, PWM controller, or logic gate) and the gate of a power MOSFET. By providing high peak gate current, gate drivers drastically reduce transition losses in switching converters, motor drives, and Class-D audio stages. Within the broader hierarchy, MOSFET drivers belong to the gate-driver family under Power Management, sitting between analog controllers and the discrete power transistors they switch. Key features include 9.0 A peak output drive current, low shoot-through current, fast rise/fall times, matched propagation delays between the two output channels, an enable pin for shutdown management, and a TTL/CMOS-compatible low-threshold input. The wide 4.5 V to 18 V supply range suits both 5 V logic rails and 12 V bus systems, while the small MSOP-8 footprint enables compact high-density layouts. The device uses a CMOS push-pull output stage with internal logic-level translation, allowing a 3.3 V microcontroller to drive the gate of a 12 V N-channel MOSFET without level shifters. The matched propagation delay between channels minimizes dead-time in synchronous-rectifier and half-bridge topologies, while the 9 A peak current quickly charges large gate charges (Qg) typical of high-current MOSFETs. Typical applications include DC-DC converter synchronous rectification, low-side and high-side MOSFET switching in motor control, Class-D audio amplifiers, power-supply OR-ing FET control, and high-current solenoid/relay drivers. The -VAO suffix indicates Microchip automotive-grade qualification, making it suitable for AEC-Q100-targeted designs. When laying out the PCB, keep the driver within 10 mm of the MOSFET gate to minimize parasitic inductance, and place a 1 V-tze ceramic bypass capacitor close to the VDD pin. If using the enable pin for sequencing, add a 100 kV pull-down to define a default-off state during power-up glitches. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone Microchip datasheet, giving engineers a single decision-grade reference for sourcing and applying the MCP14A0902-E/MSVAO.
MCP16301T-E/CH - 30V 600mA Buck DC-DC Converter SOT-23-6 | Microchip
The Microchip MCP16301T-E/CH is a highly integrated, high-efficiency, fixed-frequency step-down DC-DC converter in a 6-pin SOT-23 package that operates from input voltage sources up to 30V. It delivers up to 600 mA of output current with adjustable output from 2V to 15V and is rated for automotive temperature grade. A buck converter (also called a step-down switching regulator) is a type of switched-mode power supply (SMPS) that efficiently converts a higher DC input voltage to a lower DC output voltage by periodically switching an integrated power transistor and storing energy in an external inductor. Buck converters sit within the broader hierarchy: DC-DC converter -> switched-mode power supply -> power management IC -> semiconductor. They are widely preferred over linear regulators when the input-to-output voltage differential is large, because their switching topology achieves 90%+ efficiency versus the 30-60% typical of an LDO dissipating the same drop. Key features include a 30V maximum input voltage rating, 600 mA continuous output current, integrated high-side N-channel MOSFET switch, fixed-frequency peak current-mode control, internal compensation, peak current limit, and overtemperature protection. The 6-pin SOT-23 footprint is one of the smallest packages available for a 30V-tolerant synchronous buck, making the part popular where PCB real estate is at a premium. The MCP16301T-E/CH uses peak current-mode control with internal compensation, eliminating the need for an external compensation network and reducing the BOM to typically four external components (input cap, output cap, inductor, feedback resistor divider). The internal switch is a high-side N-channel MOSFET rated to handle the 30V input transients common in 12V automotive and 24V industrial bus systems. The fixed switching frequency (typically 500 kHz) allows predictable EMI filter design. Typical applications include 12V automotive accessory rails, point-of-load (POL) conversion from 24V industrial buses, battery-powered portable equipment, distributed power in embedded systems, and as a compact local regulator after a higher-voltage bulk converter. The 2V to 15V adjustable output range covers the most common 3.3V, 5V, 9V, 12V and 15V system rails. When designing with this device, use a low-ESR ceramic input capacitor to handle the switching ripple, an inductor rated for at least 1.5x the peak switch current, and place the feedback resistors close to the FB pin to minimize noise pickup. The exposed pad (pin 6) must be soldered to a thermal copper pour for reliable operation above 200 mA loads. This page synthesizes distributor stock, current pricing, drop-in cross-brand alternatives, and practical design notes that go beyond what the manufacturer datasheet alone provides, helping engineers select, source, and implement the MCP16301T-E/CH with confidence.
MCP1700T-2802E/MB - 250mA, 2.8V CMOS LDO | Microchip
The Microchip Technology MCP1700T-2802E/MB is a 250 mA CMOS low-dropout (LDO) linear regulator that delivers a fixed 2.8 V output from a 2.3 V to 6.0 V input in a 3-pin SOT-89-3 package with tab. It features an industry-leading typical quiescent current of 1.6 mA and an extremely low input-to-output voltage differential of 178 mV at full 250 mA load. 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, removing the need for large switching inductors. LDOs are sub-class of linear regulators, which in turn sit under the broader category of voltage regulators and power management ICs used to deliver clean, low-noise supply rails to downstream analog, digital, and mixed-signal blocks. Key features include ±2% output voltage accuracy, short-circuit current limiting, and thermal shutdown protection. The SOT-89-3 package's tab is the ground/output pin, providing a low thermal resistance path to the PCB copper pour and supporting up to 250 mA continuous output without external heatsinking in most battery-powered designs. The MCP1700 uses a CMOS pass element rather than a PNP transistor, achieving the low quiescent current that makes it ideal for battery-powered systems. Its low dropout also means more usable energy can be extracted from a Li-Ion cell as it discharges toward 3.0 V, while its stable output regulator with 1.6 mA Iq typically extends standby time on coin-cell or two-cell alkaline supplies. Typical applications include microcontroller core/logic supply (PIC, AVR, ARM Cortex-M0/M4) in battery-powered IoT nodes, single-cell Li-Ion post-regulation following a switching converter, real-time clock (RTC) and SRAM backup rails, and wireless sensor nodes such as BLE, LoRa, and Sub-GHz remotes that sleep most of the time. When designing with this device, always observe the minimum 1uF ceramic output capacitor requirement for ESR between 0.2 ohm and 2 ohm, and reserve adequate input copper below the tab. The MCP1700 leads on quiescent current and dropout voltage set by Microchip's CMOS architecture. This page synthesizes distributor pricing, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.
MCP1700T-3302E/TT - 250mA, 3.3V LDO Regulator | Microchip
The Microchip Technology MCP1700T-3302E/TT is a CMOS low-dropout (LDO) voltage regulator that delivers a fixed 3.3V output at up to 250 mA of load current, packaged in a 3-pin SOT-23 (TO-236AA) with tape-and-reel packaging. It operates from an input voltage range of 2.3 V to 6.0 V, with an extremely low input-to-output voltage differential of 178 mV typical at 250 mA, and consumes only 1.6 microamps of quiescent current (typical), making it one of the most efficient LDOs in its class. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input supply is only a few hundred millivolts above the output voltage. Unlike switching regulators, an LDO converts the excess input voltage into heat rather than storing energy in magnetic fields, which yields an inherently low-noise output that is free of switching ripple. LDOs sit within a broader taxonomy of voltage regulators under the power management IC family, and are widely used as post-regulators following switching converters to provide clean rails for noise-sensitive analog and digital blocks. Key features of the MCP1700T-3302E/TT include ±2% output voltage accuracy, internal thermal shutdown, short-circuit current limiting, and a wide operating temperature range from -40 °C to +125 °C. The device is AEC-Q100 qualified, making it suitable for automotive applications, and is RoHS compliant. The CMOS construction eliminates the ground pin current that plagues bipolar LDOs, which means quiescent current stays nearly constant across the load range. Typical applications include single-cell Li-ion powered portable devices, two- and three-cell primary battery systems (alkaline, NiMH, NiCd), USB-powered peripherals, microcontroller core supply rails, real-time clock backup supplies, IoT sensor nodes, and automotive infotainment modules. The 6 V maximum input makes it well suited for 5 V rails, while the 2.3 V minimum supports direct connection to a single Li-ion cell. When designing with this part, choose input and output ceramic capacitors that meet the manufacturer ESR stability requirement and place them within a few millimeters of the pins. Because the quiescent current is only 1.6 microamps, the part is ideal for always-on standby rails in battery-powered products where every microamp matters across years of shelf life. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone. Source: Microchip MCP1700 datasheet (20001826F) and DigiKey/Mouser distributor listings accessed on 2026-10-14.
MCP1703AT-3302E/MB - 250mA, 16V LDO Regulator, 3.3V Fixed | Microchip
The Microchip Technology MCP1703AT-3302E/MB is a 250 mA CMOS low-dropout (LDO) voltage regulator with a fixed 3.3V output, packaged in a 3-pin SOT-89-3 (MB) surface-mount format. It accepts an input voltage range of 2.7V to 16.0V and consumes only 2.0 µA typical quiescent current, making it an ideal solution for multi-cell battery-powered designs. 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 - it drops only a small headroom (dropout voltage) between VIN and VOUT. LDOs sit within the broader hierarchy of linear regulators -> voltage regulators -> power management ICs -> analog semiconductors. They are valued for simplicity, low quiescent current, no switching noise, and small PCB area, trading efficiency for noise performance at moderate current levels. Key specifications include 250 mA maximum output current, 178 mV typical dropout voltage at 250 mA load, 2.0 µA typical quiescent current, and ±2% output voltage accuracy. The MCP1703A family provides short-circuit protection and thermal shutdown. The 3-pin SOT-89 package is a thermally enhanced surface-mount format that dissipates up to about 800 mW at the 25 C ambient reference condition. The internal architecture uses a CMOS pass element and a low-current bandgap reference, which together minimize ground current across load. Unlike a PNP-based regulator, this P-MOSFET topology keeps quiescent current essentially constant over load, a critical advantage for sleep-current dominated IoT and battery-backed designs. Stability is achieved with only 1 µF ceramic output capacitance. Typical applications include 2-6 cell alkaline battery power supplies, 9V wall-adapter powered systems, single- or dual-cell Li-Ion powered devices, IoT sensor nodes, MCU auxiliary rails, and metering/instrumentation power. It is well-suited wherever long battery life, a small PCB footprint, and clean DC rails are required. When designing with this part, observe the minimum input-to-output headroom to keep the LDO in regulation. Use a 1 µF X7R ceramic bypass capacitor on the output placed as close as possible to the VOUT pin, and an optional 1 µF on VIN to suppress source transients. Verify thermal dissipation in continuous 250 mA load because the SOT-89 PCB copper area drives thermal resistance. This page synthesizes distributor pricing, verified SOT-89-3 drop-in alternatives, and practical battery-application design notes not consolidated on the manufacturer product page.
MCP1703T-3302E/MB - 250mA, 3.3V LDO Regulator SOT-89 | Microchip
The Microchip Technology MCP1703T-3302E/MB is a CMOS low-dropout (LDO) voltage regulator in a fixed 3.3V output configuration that delivers up to 250 mA of output current while consuming only 2.0 uA typical quiescent current, housed in a 3-pin SOT-89-3 (MB) surface-mount package. The device accepts an input voltage range of 2.7V to 16.0V and provides a typical dropout voltage of approximately 178 mV at 250 mA, making it ideal for multi-cell battery-powered systems including 9V alkaline, two-to-six primary cells, or one-to-three cell lithium-ion packs. A low-dropout (LDO) regulator is a type of linear voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage, dropping the input-output differential to a few hundred millivolts. Within the broader power management IC hierarchy, LDOs sit alongside switching converters (buck, boost, buck-boost) as the primary means of producing low-noise, post-regulated rails from a higher-voltage source. Unlike switching regulators, an LDO does not introduce high-frequency ripple, making it the preferred post-filter for noise-sensitive analog and RF blocks. Key features of the MCP1703T-3302E/MB include 2.0 uA typical quiescent current, low dropout operation that preserves battery life, internal thermal shutdown protection, short-circuit current limiting, and ceramic output capacitor stability. The CMOS process enables the very low IQ figure, and the device does not require a minimum load to maintain regulation. The SOT-89-3 package provides a power-dissipation capability of approximately 1.6W with adequate copper area. Typical applications include battery-powered wireless sensor nodes, IoT end nodes, 9V battery industrial sensors, single-cell Li-ion powered handhelds, microcontroller core/MCU supply rails (3.3V from 1S Li-ion or 2-cell AA), and remote-control battery-powered consumer devices. The ultra-low IQ of 2.0 uA is the central differentiator that enables years of shelf life and run time from small primary batteries. When designing with this device, ensure the input capacitor is at least 1 uF ceramic placed close to the VIN pin and the output capacitor is at least 1 uF low-ESR ceramic for loop stability. Verify junction temperature under worst-case VIN (16V) and 250 mA load, and observe the SOT-89 power pad layout to maximize heat dissipation. This page synthesizes distributor pricing, SOT-89 drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including same-family Microchip variants and cross-brand equivalents.
MCP1711T-30I/5X - 150mA, 3.0V Capless LDO | Microchip Technology
The Microchip Technology MCP1711T-30I/5X is a 150 mA CMOS low-dropout (LDO) linear regulator with a fixed 3.0 V output, housed in a 4-pin 1 mm x 1 mm UQFN package. It accepts input voltages from 1.4 V to 6.0 V and dissipates only 0.6 uA typical quiescent current, making it one of the lowest-Iq LDOs in its class. The output is stable with no output capacitor ("capless") required, which saves board space in compact wearable and IoT designs. 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. LDOs sit in the broader hierarchy: linear regulator -> voltage regulator -> power management IC. They are favored over switching regulators when low noise, small solution size, and fast transient response outweigh efficiency considerations, especially in always-on battery-powered systems where quiescent current dominates standby life. Key features of the MCP1711T-30I/5X include 500 mV dropout at 150 mA load, integrated current foldback that reduces IOUT to ~80 mA at short circuit, a logic-level shutdown input that drops Iq to <0.1 uA, and a power-good output flag. The UQFN-4 (1x1) exposed-pad package achieves a thermal resistance suitable for 150 mA continuous load across the -40C to +85C industrial range without external heatsinking. Architecturally, the device uses a P-channel MOSFET pass element with a precision bandgap reference, yielding low dropout and excellent line/load regulation. The internal soft-start and current-limit blocks protect downstream circuitry from inrush and fault conditions. The 3.0 V fixed output aligns directly with common MCU and Bluetooth SoC nominal rails. Typical applications include wearable health monitors, coin-cell powered IoT sensor nodes, energy harvesting systems, Bluetooth Low Energy (BLE) modules, and any battery-powered product that needs a clean 3 V rail directly from a discharged Li-ion cell. A primary design consideration is thermal budget: at VIN = 3.6 V, VOUT = 3.0 V, and 150 mA, the device dissipates ~90 mW. At VIN = 6.0 V, VOUT = 3.0 V, full load, dissipation rises to ~450 mW - verify the PCB copper area is sufficient to keep theta_JA within safe limits. This page synthesizes distributor pricing from DigiKey, Mouser, Arrow, Octopart, LCSC, and Jotrin; lists same-family drop-in alternatives; and includes practical design notes not aggregated in the manufacturer datasheet.
MCP1711T-33I/5X - 3.3V 150mA Ultra-Low-IQ LDO | Microchip
The Microchip Technology MCP1711T-33I/5X is a fixed 3.3 V, CMOS low-dropout voltage regulator rated for 150 mA output current in a 4-UQFN exposed-pad package measuring 1 x 1 mm. It accepts a 1.4 V to 6 V input range, has a 500 mV dropout specification, and typically consumes only 0.6 uA quiescent current. Its 3.3 V fixed output and extremely low standby consumption suit compact, battery-operated equipment. An LDO is a linear regulator that passes voltage from its input to its output through a conducting pass element while regulating the output to a defined level. LDOs are used when low noise, simple power conversion, and low standby demand matter more than conversion efficiency. The MCP1711 family is positioned within the voltage-regulator and power-management IC hierarchy for small loads and distributed rails. The key benefit is extremely low quiescent current: 0.6 uA typical. This helps preserve battery capacity when the load is inactive. The regulator also supports up to 150 mA and provides a stable 3.3 V output without requiring an output capacitor, according to the manufacturer product page. These characteristics suit sensors, portable instrumentation, embedded systems, and compact industrial nodes. The MCP1711 uses a CMOS implementation intended for accurate low-power regulation. Its fixed-output configuration removes the external resistor divider used by adjustable LDOs. The 1 x 1 mm UQFN package supports dense PCB layouts, while the exposed pad provides a thermal and electrical connection to the board when assembled according to the datasheet land pattern. Typical designs place the MCP1711 downstream of a battery or low-voltage regulator and feed a 3.3 V rail to a microcontroller, wireless module, or sensor cluster. Because an LDO dissipates the difference between input and output voltage as heat, efficiency is highest when VIN is close to 3.3 V and load current is modest. At the 150 mA limit, designers should account for input/output headroom, startup behavior, and exposed-pad soldering. This page combines the verified manufacturer specifications with distributor availability, package details, procurement data, and practical design guidance. It also distinguishes verified drop-in substitutes from package-only lookalikes so engineers can assess PCB compatibility without assuming that a similar package guarantees pin-to-pin replacement.
MCP1755ST-5002E/DB - 300mA, 16V LDO Regulator | Microchip | 5V Fixed
The Microchip Technology MCP1755ST-5002E/DB is a 16V, 300mA low-dropout (LDO) linear regulator with a fixed 5V output in a SOT-223-3 package (TO-261-4 / TO-261AA). It features high PSRR (typically 70 dB at 1 kHz) and short-circuit current foldback protection. The input operating voltage range spans from 3.6V to 16V continuous, with an absolute maximum of 18V. 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. In the broader system hierarchy, LDOs belong to linear regulators, then to voltage regulators, then to power management ICs, and ultimately to the semiconductor device family. LDOs are preferred over switching regulators in noise-sensitive analog circuits because they introduce no switching ripple. Key features of the MCP1755ST-5002E/DB include a 5V fixed output with ±2% accuracy, low quiescent current for battery-friendly operation, an active-high shutdown pin (the "S" in the part number indicates the shutdown feature), and current foldback protection that reduces power dissipation during short-circuit events. The SOT-223-3 package with its thermal tab enables continuous 300mA output with reasonable PCB copper area. The MCP1755S architecture uses a CMOS process with a precision bandgap reference and a low-resistance P-channel pass element, achieving low dropout and high ripple rejection. The high PSRR minimizes ripple from upstream switching converters, making it suitable for AC-adapter-powered and post-regulation applications where clean rails are required. Typical applications include USB-powered devices, microcontroller power rails, sensor conditioning modules, battery chargers, AC adapter post-regulation, and battery-powered portable electronics where low quiescent current is critical. When designing with this device, ensure the input voltage stays within the 3.6V-16V continuous operating range and never exceeds the 18V absolute maximum. Use a 1uF ceramic input capacitor and a 1uF ceramic output capacitor close to the IC pins for stable operation. The exposed thermal tab must be soldered to a PCB copper pour to achieve rated output current. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MCP1792T-4102H/CB - 4.1V 100mA High-Voltage LDO | Microchip
The Microchip Technology MCP1792T-4102H/CB is a fixed 4.1 V, low-dropout linear regulator rated for 100 mA output current and housed in a 3-lead SOT-23A tape-and-reel package. It accepts a 4.5 V to 55 V input range, making it suitable for 12 V, 24 V, and 48 V power rails. The part is a positive, single-output regulator designed where a clean, stable low-voltage rail is required from a substantially higher supply voltage. A low-dropout regulator, or LDO, is a linear voltage regulator that passes input voltage to its output through a conducting pass element while regulating the output with very little voltage difference between input and output. An LDO belongs to the linear-regulator and voltage-regulator hierarchy within power-management semiconductors. Unlike a switching DC-DC converter, an LDO introduces no switching ripple, although the unused voltage is dissipated as heat. Key features include a 4.1 V fixed output, 100 mA maximum output current, and an unusually broad 4.5 V to 55 V operating-input range. The high-voltage capability lets the device derive a low-voltage rail without an upstream step-down stage. Its low ground current of 100 microamperes and low undervoltage-lockout behavior also support efficient operation from high-voltage battery packs and protected industrial supplies. The MCP1792 belongs to the MCP1792/MCP1793 high-voltage LDO family. These regulators target applications requiring low quiescent demand and a compact three-pin implementation. Because output-current capability is only 100 mA, the device is intended for sensors, interface circuits, housekeeping rails, and control electronics rather than motors, heaters, or high-current power stages. Typical uses include 12 V to 48 V industrial control rails, automotive-style electrical systems, high-voltage battery packs, sensor interfaces, and low-current embedded-control loads. The 4.1 V output can power compatible mixed-signal, sensing, or logic circuitry when that equipment specifically requires a 4.1 V rail. The SOT-23A footprint simplifies compact PCB layouts, although correct input and output capacitors remain essential for stability. The principal design consideration is thermal dissipation. Because this is a linear regulator, power loss is approximately the difference between input and output voltage multiplied by load current. A design operating near 55 V input with 100 mA load therefore has a large thermal burden and should be evaluated against the package and ambient-temperature limits in the manufacturer datasheet. This product page combines the verified 4.1 V, 100 mA, 4.5 V-to-55 V, 3-lead SOT-23A information with practical thermal guidance, application context, and a conservative replacement assessment. Distributor availability and pricing change over time, so buyers should confirm current stock, lifecycle status, and lot traceability before committing to production procurement.
MCP1792T-5002H/CB - 100mA 55V High-Voltage LDO | Microchip
The Microchip Technology MCP1792T-5002H/CB is a fixed 5.0 V, 100 mA low-dropout linear regulator with a 4.5 V to 55 V input range, housed in a three-lead SOT-23A surface-mount package. It is designed to derive a stable 5 V rail from 12 V to 48 V industrial, automotive, and high-voltage battery systems while avoiding the switching noise of a DC-DC converter. A low-dropout regulator, or LDO, is a linear voltage regulator that passes input voltage to a load while maintaining a nearly constant output. LDO devices belong to the linear-regulator, voltage-regulator, and power-management-IC hierarchies. Compared with switching regulators, an LDO generally offers quieter output and simpler layout, although power dissipation rises with input-output voltage difference and load current. The MCP1792 family provides 100 mA output current, fixed 5.0 V operation for this ordering code, and a wide 4.5 V to 55 V input range. Verified distributor data also identifies undervoltage lockout, overcurrent protection, over-temperature protection, and over-voltage protection. Reported performance data includes 400 uVrms output noise, 45 uA quiescent current, and 55 dB PSRR at 100 kHz, making the device appropriate for compact low-noise sensor and interface rails. The three-lead MCP1792 configuration uses input, ground, and output connections and omits the shutdown pin found in the five-lead MCP1793. This simpler control interface suits always-on systems where shutdown current is not a primary concern. Its wide input range also provides useful transient margin for 12 V and 24 V automotive environments while maintaining a regulated 5 V supply for downstream electronics. Typical uses include automotive sensors, industrial controllers, battery-powered equipment, 24 V bus interfaces, measurement modules, and low-noise analog rails. The fixed 5 V output also simplifies designs that do not require an adjustable regulator or high current capability. Design around the 100 mA current limit and verify regulator dissipation across the complete input range. At 48 V input and 100 mA load, the estimated pass-element dissipation is approximately 4.3 W before accounting for the output-to-input voltage difference precisely; this generally requires careful copper-area thermal design in a SOT-23A package. This page consolidates verified manufacturer specifications, distributor information, application guidance, and drop-in alternative analysis into one engineering-focused reference for the MCP1792T-5002H/CB.
MCP1801T-5002I/OT - 5V 150mA High-PSRR LDO | Microchip
The Microchip Technology MCP1801T-5002I/OT is a fixed 5 V, 150 mA CMOS low-dropout voltage regulator with a 2.0 V to 10.0 V input range and shutdown, packaged in a 5-pin SOT-23. The device provides high power-supply rejection ratio, low noise, low dropout operation, and typical 25 µA quiescent current. A low-dropout regulator, or LDO, is a linear voltage regulator that passes its output through a small residual voltage between input and output while regulating a stable DC rail. LDOs belong to the linear-regulator, voltage-regulator, and power-management-IC hierarchy. They are especially useful when a system needs simpler control, low output noise, and less switching disturbance than a compact DC-DC converter may provide. The MCP1801 family combines a maximum output current of 150 mA with an input range that covers two to six primary cells, a 9 V alkaline source, and one- or two-cell Li-ion systems. Its fixed 5 V configuration makes this orderable variant useful for sensors, embedded controls, RF modules, and logic rails. The manufacturer describes the MCP1801 as ceramic-output-capacitor stable, while its shutdown feature allows the rail to be disabled when the load no longer needs power. The 150 mA rating is appropriate for low-current loads, not for motors, high-power display backlights, or other large transients. Input bypass capacitance helps supply fast load changes, and the output capacitor must meet the stability requirements stated in the manufacturer datasheet. Designers should verify startup behavior, dropout margin, and the allowable input and output capacitor ranges in the final voltage and temperature conditions. This part is useful as a local post-regulator following a switching stage, as a battery-derived 5 V rail, or as a noise-conscious supply for an analog or mixed-signal module. Compared with a switching regulator, its linear topology avoids the inductor and switching node, but it dissipates the difference between input and output voltage as heat. That trade-off is most favorable when the available current is modest and the voltage drop is limited. The SOT-23-5 footprint supports compact layouts, yet its exposed thermal capability is limited. Place input and output capacitors close to their respective pins, use a short and appropriately sized ground return, and avoid routing sensitive signals beneath the regulator if the system is sensitive to power-distribution noise. This page combines verified distributor and manufacturer information with practical design guidance, procurement context, and a traceable source list rather than repeating only the basic catalog description.
MCP1810T-30I/J8A - 150mA, 3.0V Ultra-Low Iq LDO | Microchip
The Microchip Technology MCP1810T-30I/J8A is a 150 mA ultra-low quiescent current CMOS LDO linear regulator that delivers a fixed 3.0 V output from a 2.5 V to 5.5 V input, housed in an 8-pin VDFN (2x2 mm) package with an exposed thermal pad. It is the 3.0 V fixed variant (suffix -30) of the MCP1810 family and is supplied on tape-and-reel (T/R) for high-volume assembly. 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. Within the broader power management hierarchy, LDOs sit below switching regulators because they trade efficiency for low noise - they dissipate the difference between input and output as heat rather than switching it, producing no EMI ripple. The MCP1810 specifically targets battery-powered IoT and always-on applications where quiescent current dominates battery life. Key differentiating specifications include a 20 nA (typical) quiescent current during operation, a 1 nA (typical) shutdown supply current, a 380 mV dropout at 150 mA load, and an enable pin for sequenced power control. The device maintains 150 mA output for output voltages at or below 3.5 V, and 100 mA for higher output rails in the same family. Its CMOS architecture delivers clean, low-noise power suitable for analog and mixed-signal loads. Typical applications include single-cell Li-ion powered IoT sensor nodes, wearables and Bluetooth beacons, energy harvesting systems, RTC backup power domains, and always-on microcontroller rails. The 20 nA quiescent current is roughly 1000x lower than typical LDOs, extending coin-cell battery life from months to multiple years in low-duty-cycle applications. Design consideration: choose the 1 uF ceramic input/output capacitors specified in the manufacturer datasheet - smaller values can compromise loop stability. For battery applications, also note that dropout at 150 mA approaches 380 mV, leaving a usable minimum input of about 3.38 V for a 3.0 V output. This page synthesizes distributor pricing, drop-in alternatives, application references, and design guidance not found in the standalone datasheet PDF, giving engineers a single source for selection and sourcing of the MCP1810T-30I/J8A.