Power Management
Subcategories
Products (2,800+)
MIC2514BM5 - IttyBitty High-Side Switch, SOT-23-5 | Microchip
The Microchip Technology MIC2514BM5 is an integrated high-side power switch combining a TTL-compatible input with a protected P-channel MOSFET in a compact 5-pin SOT-23-5 package, with an operating temperature range of -40C to +85C. Originally introduced by Micrel Semiconductor (now part of Microchip Technology), it replaces a discrete high-side driver plus MOSFET combination in low-voltage applications. A high-side switch is a power switching device placed between the supply rail and the load, controlling power delivery by switching the positive supply rather than the ground path. High-side switching is preferred in automotive, industrial, and portable systems because a switched-off load remains referenced to ground, avoiding ground-float faults and simplifying fault diagnostics. The MIC2514 belongs to the power management IC category, sitting within load-switch and hot-swap protection devices under semiconductor power control. Key features include the integrated protected P-channel MOSFET output stage, a TTL-compatible logic input that interfaces directly with microcontroller GPIO or logic-level control signals, and integrated protection functions that reduce external component count. The IttyBitty SOT-23-5 package occupies minimal board area, making the part attractive where a discrete solution would need several square millimeters of PCB space plus placement and routing overhead. Technically, the P-channel MOSFET architecture allows the switch to be turned on by pulling the control input low relative to the input supply, with internal charge or level-shift circuitry handling the gate drive. The protection circuitry guards against fault conditions that would otherwise destroy a discrete MOSFET without driver supervision. Because it switches the positive rail, the part eliminates the need for a separate gate-drive supply or charge pump that an N-channel high-side solution would require at these low voltages. Typical applications include USB and peripheral port power switching, low-voltage load switching in battery-powered portable equipment, and replacing discrete driver-plus-MOSFET high-side configurations in low-voltage industrial boards. When designing with the MIC2514BM5, verify the continuous load current, on-resistance, and fault-protection thresholds against the manufacturer datasheet, as these determine thermal rise and protection timing in the end application. This page synthesizes verified distributor data, drop-in alternative guidance, datasheet sourcing, and practical design notes not consolidated in the manufacturer datasheet alone.
MIC2514YM5-TR - 1.2A High-Side Power Switch | Microchip
The Microchip Technology MIC2514YM5-TR is an integrated high-side power distribution switch combining a TTL-compatible control input with a protected P-channel MOSFET in a 5-pin SOT-23-5 (SC-74A/SOT-753) package. It operates from a 3 V to 13.5 V input supply and supports a rated switch current of 1.2 A with a current-limit specification up to 1.9 A. A high-side switch, sometimes called a power distribution switch or load switch, is a power management IC that places a switching element between a supply rail and a load, controlling power delivery from the positive side of the rail. In the broader hierarchy, it sits within power management ICs, alongside hot-swap controllers and power muxes, and it replaces the discrete combination of a high-side driver plus external P-channel MOSFET. Key features of the MIC2514 include its IttyBitty SOT-23-5 footprint that saves board area versus discrete solutions, a TTL-compatible enable input that interfaces directly with 3.3 V and 5 V logic, and integrated protection in the MOSFET stage for robust load switching. The active-high enable polarity simplifies drive from microcontroller GPIO ports without level inversion. Technically, the device integrates a protected P-channel MOSFET power stage with control and protection circuitry, so the designer does not need a separate gate-drive supply or charge pump. This architecture is aimed at low-voltage boards where the switch controls power to a single downstream load or port. Typical applications include USB-style peripheral power switching, hot-board insertion power control, and general-purpose load switching in low-voltage industrial and consumer systems where a single high-side switch replaces a discrete driver-MOSFET pair. Design consideration: keep the input within the 3 V to 13.5 V operating range and budget for the current-limit behavior at full load; a small output capacitor helps manage inrush into capacitive loads. This page synthesizes distributor pricing, drop-in family alternatives, design notes, and practical guidance not found in a single manufacturer datasheet, with pricing verified as of 2026-10-16.
MIC2558BM - PCMCIA Dual Card Socket VPP Switch Matrix | Micrel
The Micrel Semiconductor MIC2558BM is a PCMCIA dual card socket VPP switching matrix that switches the four voltages required by PCMCIA (Personal Computer Memory Card International Association) card VPP1 and VPP2 pins, providing selectable 12.0V flash-programming and card-power voltages from a compact SOIC package. Per the Micrel datasheet, the device integrates two independent switching channels (VPP1 and VPP2) so a single IC can serve a dual-slot PCMCIA card cage. A VPP switching matrix, sometimes called a card-socket power switch, is a specialized power management IC in the broader family of load switches and power-distribution switches. In PC Card (PCMCIA) hosts, the VPP pins of a card socket must present 0V (grounded), 12V (programming voltage for flash cards), or the card's VCC voltage (3.3V or 5V read/write operation), and the switching matrix routes the correct voltage to each socket pin under host controller command. This function sits between the system power rails and the card socket in the notebook or embedded host power architecture. Key features of the MIC2558 include dual-channel operation covering both VPP1 and VPP2 pins of a PCMCIA socket, selectable 12.0V programming voltage output, low on-resistance switching paths to minimize voltage drop during card flash programming, and logic-level control inputs compatible with standard PCMCIA host controller GPIO outputs. The B grade suffix denotes the commercial operating temperature grade, and the M suffix denotes the SOIC surface-mount package. Architecturally, the device uses MOSFET switch segments arranged in a matrix so that any one of the available input voltages can be connected to either VPP output, with break-before-make switching behavior preventing momentary shorts between supply rails. Internal gate-drive circuitry ensures the external MOSFET switches are driven fully on for low drop-out, eliminating the need for discrete level shifters or drivers in the host design. Typical applications include notebook and laptop PCMCIA card slots, industrial embedded hosts with PC Card interfaces, flash-card programming fixtures, and legacy CardBus development systems where 12V VPP flash programming voltage must be supplied to memory cards. When designing with the MIC2558, ensure the 12V programming rail can deliver the card VPP programming current and observe datasheet logic-input timing to guarantee break-before-make switching between voltage states. This page synthesizes distributor sourcing data, drop-in alternative guidance, and practical design notes not found in the manufacturer datasheet.
MIC2776N-YM5-TR - Adjustable Voltage Supervisor SOT-23-5 | Microchip
The Microchip MIC2776N-YM5-TR is a micropower adjustable voltage supervisor with a 0.3V internal reference threshold, manual reset input, and an active-low open-drain reset output, housed in a 5-pin SOT-23-5 package. It monitors a single supply rail and generates a power-on reset signal for microcontrollers and microprocessors. A voltage supervisor (also called a reset generator or supervisory circuit) is a power management IC that watches a supply rail and asserts a reset signal whenever the voltage falls below a defined trip point. Within the component hierarchy, the MIC2776 sits in the power management IC family alongside voltage regulators and battery monitors, serving as the first line of defense against brown-out conditions that could corrupt microcontroller memory or cause uncontrolled I/O states. Key features include the adjustable under-voltage detector built around a precision 300 mV reference: an external resistor divider sets the trip point to any rail voltage above 0.3V, making the device suitable for monitoring 1.8V, 2.5V, 3.3V, and 5V systems. The manual reset (MR) input allows a push-button or host processor to force a reset, and hysteresis on the comparator prevents chatter near the threshold. The reset timeout is at least 140 ms, set by an external capacitor on the delay pin, ensuring processors have adequate stabilization time before code execution begins. Internally, the MIC2776 combines a bandgap reference, a micropower comparator, a delay generator, and an open-drain output stage. The open-drain output can be pulled up to any voltage rail, permitting level translation between the monitored rail and the target processor's reset input - a key advantage when supervising a 1.8V core from a 3.3V domain. Quiescent current is in the microampere class, so the device adds negligible load to battery-powered rails. Typical applications include reset generation for 8-bit and 32-bit microcontrollers (such as the Motorola 68HC11 family cited in the Microchip datasheet), battery-powered portable instruments, industrial control nodes, and set-top or consumer electronics requiring a reliable brown-out guard. Design consideration: because the trip point is set by an external divider, use 1% or better tolerance resistors and account for the internal hysteresis when calculating the release threshold, so noise near the comparator trip region does not cause repeated resets. This page adds value beyond the manufacturer datasheet by synthesizing distributor pricing tiers, pin-compatible drop-in alternatives, comparison tables, and practical design notes in one place. Pricing shown as of 2026-10-16.
MIC28516T-E/PHA - 70V/8A Sync Buck Regulator | Microchip
The Microchip Technology MIC28516T-E/PHA is a 70V-input, 8A-output synchronous DC/DC buck regulator featuring Hyper Speed Control adaptive on-time architecture, integrated low-FOM N-Channel trench FETs, and external soft start in a 32-pin VQFN-EP (5x5 mm) package. It operates from 4.5V to 70V input with adjustable output from 0.6V to 32V and ±1% output accuracy. A buck regulator (step-down switching converter) is a power management IC that efficiently converts a higher DC input voltage to a lower DC output voltage using high-speed switching of integrated power MOSFETs and energy storage in an external inductor and capacitor. Within the broader power management hierarchy, buck regulators sit under DC-DC converters, which themselves belong to the power management IC (PMIC) family. The synchronous topology replaces the traditional Schottky rectifier with a low-side FET, dramatically improving efficiency at high output currents. Key specifications include 8A continuous output current, 4.5V-70V wide input range, 0.6V-32V adjustable output, and Hyper Speed Control that delivers ultra-fast transient response without the loop-compensation complexity of classical voltage-mode controllers. Additional features include external soft-start, internal high-side bootstrap switch, thermal-shutdown, input undervoltage lockout, and a PGOOD indicator. The 32-VQFN exposed-pad package provides a low thermal-resistance path for dissipating power at full 8A load. Internally, the MIC28516 uses Microchip's enhanced adaptive on-time Constant On-Time (COT) controller co-packaged with a pair of low figure-of-merit N-Channel trench MOSFETs. This architecture eliminates the need for external compensation components and achieves fast transient response by modulating the on-time based on input voltage, output voltage, and desired switching frequency - typically 200 kHz to 1 MHz adjustable. Typical applications include industrial 24V/48V point-of-load regulation, telecom and networking equipment power, automotive 12V/24V accessory rails, battery-powered systems up to 60V, distributed power architectures, and general-purpose wide-Vin step-down conversion. Designers value this part when they need a high-current, wide-Vin buck in a compact thermally-enhanced package without writing a compensation network. When designing, choose the external feedback resistor divider for the desired output, size the inductor for 20-40% peak-to-peak ripple, and use ceramic output capacitors with low ESR. The exposed pad must be soldered to a sufficient copper pour (typically 1 sq inch minimum) to keep junction temperature within the 125C operating limit at full 8A load. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical PCB layout/design notes not found in the manufacturer datasheet alone.
MIC29151T-3.3G - 1.5A LDO 3.3V Fixed TO-263-5 | Microchip
The Microchip (formerly Micrel) MIC29151T-3.3G is a high-current, low-dropout (LDO) linear voltage regulator delivering a fixed 3.3V output at up to 1.5A in a 5-pin TO-263-5 surface-mount package. It is part of the MIC29150/29300/29500/29750 high-current LDO family, designed for applications requiring tight regulation, low quiescent current, and robust on-chip protection. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input-to-output voltage differential is small — typically a few hundred millivolts. LDOs sit hierarchically under linear regulators, then voltage regulators, then power management ICs, and ultimately semiconductors. Unlike switching regulators, LDOs add no switching noise to the output, making them ideal as post-regulators following switchers, or for directly powering noise-sensitive analog and digital loads. Key features of the MIC29151T-3.3G include a typical dropout of 350 mV at 1.5A, ±1% initial output accuracy, very low quiescent current, an active-high enable pin for power sequencing, an error flag output (FLG) for monitoring VOUT regulation, and internal protection circuitry including thermal shutdown, current limiting, and reverse-battery protection. The TO-263-5 (DPAK-style) package provides a thermal pad that, with proper PCB copper area, allows sustained 1.5A operation without external heatsinking at moderate VIN-VOUT differentials. The regulator uses a classical PNP-pass architecture with a bandgap reference, which is the engineering foundation for its low-dropout capability and fast transient response. On-chip protection blocks monitor junction temperature and output current independently, and a logic-level FLG pin signals when the output drops approximately 5% below nominal — useful for cascaded power-rail monitoring in multi-supply systems. Typical applications for the MIC29151T-3.3G include 5V-to-3.3V post-regulation in industrial control boards, USB peripheral power, microcontroller and DSP core supplies, battery-backed 3.3V rails, networking line-card logic supplies, and FPGA/MCU auxiliary rails where switching noise from upstream converters must be cleaned up before reaching the load. When designing with the MIC29151T-3.3G, ensure that the worst-case VIN-VOUT differential times load current stays within the package's SOAR limits; at 1.5A the dropout near 350 mV means VIN must be at least approximately 3.65V for regulation. Minimum ESR-stable output capacitance of 10 uF is required, and the enable pin must not be left floating — tie it high through a resistor for always-on operation. This page consolidates the manufacturer datasheet, distributor stock and pricing, drop-in cross-brand equivalents, and practical design notes that supplement — and go beyond — the datasheet's nominal specification tables.
MIC29152WT - 1.5A LDO Regulator, Adjustable, TO-220-5 | Microchip
The Microchip Technology MIC29152WT is a high-current 1.5A low-dropout (LDO) linear voltage regulator with an adjustable output of 1.25V to 26V, housed in a 5-pin TO-220 through-hole package with tab. It accepts input voltages from 2.5V to 26V and uses a PNP pass element to deliver a typical dropout of 350-425 mV at full 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. LDOs sit within the broader hierarchy of voltage regulators and power management ICs (PMICs), and are favored for their low noise, simplicity, and fast transient response when compared to switching regulators. The MIC29152WT builds on Micrel's proprietary Super Beta PNP process, which allows high-current delivery with a single PNP transistor and eliminates the need for external PNP pass devices. Key features include a 1.5A continuous output current, 350-425 mV typical dropout at full load, an active-high shutdown pin for power sequencing, an adjustable output set by an external resistor divider, internal current limiting, thermal shutdown, and reverse-battery protection. The TO-220-5 package provides a low thermal resistance path through the tab for efficient heat dissipation. The PNP pass architecture with Super Beta process technology yields excellent load transient response and low quiescent current, making this part suitable for post-regulator filtering of switching supplies and for battery-powered applications. The wide VIN range allows operation directly from multi-cell battery stacks, 5V or 12V rails, or post-regulated intermediate voltages. Typical applications include post-regulation for switching power supplies, battery-powered equipment, USB and peripheral power rails, industrial 12V/24V systems, and high-current point-of-load regulation for FPGAs, microcontrollers, and DSPs. The shutdown pin enables power sequencing in multi-rail systems. When designing with this device, verify that VIN - VOUT remains above the dropout threshold under worst-case load to maintain regulation. Add adequate copper area or a heatsink to the TO-220 tab for high dissipation scenarios above 2W. This page synthesizes distributor pricing, drop-in compatible alternatives from same-package Microchip parts, and practical design notes that are not collated in the manufacturer datasheet alone.
MIC29302BU - 3A Adjustable LDO Regulator, 26V VIN | Microchip
The Microchip Technology MIC29302BU is a 3.0 A high-current, high-accuracy, low-dropout (LDO) linear regulator housed in a 5-lead TO-263 (D2Pak, BU suffix) surface-mount package with an exposed thermal tab. It operates from a VIN range of 2.25 V to 26 V and delivers an adjustable output from approximately 1.25 V up to 25 V, with a typical dropout voltage of 370 mV at full 3 A load. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input-to-output voltage differential is very small. LDOs sit hierarchically under linear regulators, which in turn belong to the broader voltage regulator family within power management ICs. They are preferred over switching regulators in noise-sensitive applications because they introduce no switching ripple, at the cost of lower efficiency when VIN-VOUT is large. Key features include ±2 % output accuracy, reverse-battery protection, current limiting, thermal shutdown, and an active-high TTL-compatible shutdown (EN) pin. The regulator uses Microchip's proprietary Super βeta PNP pass-element architecture, which keeps ground current low across the load range. The TO-263-5 package with the metal tab tied to the die enables continuous 3 A operation when soldered to adequate copper area. Typical applications include point-of-load regulation after a switching converter, industrial 24 V-to-5 V/3.3 V rails, automotive body modules (non-safety), battery-powered equipment with reverse-polarity protection, and motor-driver auxiliary supplies. The reverse-battery feature is particularly valued in 12 V/24 V lead-acid systems where mis-wiring is a real risk. When using this part, choose output capacitor ESR carefully (per datasheet curve) to avoid output instability, and lay out copper pour under the tab to keep junction temperature within limits - thermal resistance of approximately 2 C/W junction-to-case allows 15 W dissipation with a moderate heatsink.
MIC4120YML-TR - 6A Low-Side MOSFET Gate Driver | Microchip
The Microchip Technology MIC4120YML-TR is a 6 A peak non-inverting low-side MOSFET gate driver IC in an 8-pin MLF (2x2 mm) surface-mount package, supplied on tape and reel. A low-side MOSFET driver is a power-management interface IC that translates logic-level control signals into the high-current gate charge and discharge currents needed to rapidly switch power MOSFETs referenced to ground. Within the signal-chain hierarchy, it sits between a PWM controller or microcontroller GPIO and the power MOSFET gate, providing voltage regulation-independent drive strength that logic outputs alone cannot deliver. Key features include 6 A peak output current capable of driving the largest MOSFETs with an improved safe operating margin, logic-compatible input thresholds accepting any input from 2.4 V to VS without external speed-up capacitors or resistor networks, and negative input voltage protection of up to 5 V below ground. The non-inverting output polarity simplifies firmware development compared with inverting driver alternatives. Architecturally, the MIC4120 is an improved version of the popular MIC4420, incorporating proprietary input circuits that tolerate input undershoot and latch-up-resistant output stages. These circuits protect against damage from electrostatic discharge and electrical overstress, making the part tough and efficient in demanding switching environments. The MLF package offers low inductance for fast gate-current delivery. Typical applications include switch-mode power supplies, DC-DC converter primary-side switching, motor drive gate interfaces, and class-D amplifier output stages where high peak gate current shortens switching transitions and reduces switching losses. Design consideration: keep the driver gate trace short and place a low-ESR decoupling capacitor close to the supply pin, because 6 A peak gate currents can induce significant ground bounce in long loops. This page synthesizes distributor pricing, drop-in alternatives, pinout guidance, and practical design notes not found in the manufacturer datasheet alone.
MIC4420BN - 6A Peak Low-Side MOSFET Driver | Microchip
The Microchip Technology MIC4420BN is a single-channel low-side MOSFET gate driver IC delivering 6 A peak output current in an 8-pin PDIP through-hole package. It is a non-inverting driver fabricated on a bipolar/CMOS/DMOS process and operates from a 4.5 V to 18 V supply. According to the manufacturer datasheet, the device is capable of 6 A peak output and can drive the largest MOSFETs with low switching losses. A low-side gate driver (also called a non-inverting MOSFET driver) is a power-management building block that sits between a low-power control signal (typically from a microcontroller or PWM controller) and the gate of a power MOSFET. Its job is to translate a logic-level PWM input into a high-current drive that can rapidly charge and discharge the MOSFET's gate capacitance, slashing switching losses and eliminating the need for the controller to source/sink gate current directly. Gate drivers belong to the broader power-management IC family and sit alongside voltage regulators, supervisors, and motor drivers. Key features of the MIC4420BN include a 4.5 V to 18 V supply range, can-to-margin switching speeds with typical rise/fall times in the nanosecond range, and matched propagation delays between the input and output edges. The driver is rated for 6 A peak output current both sourcing and sinking, allowing it to handle high gate-charge MOSFETs at high PWM frequencies. The bipolar/CMOS/DMOS process combines low quiescent current with high peak-current capability and rugged latch-up immunity. Typical applications include switch-mode power supplies, motor-drive half-bridge low-side drivers, solenoid drivers, and Class D audio amplifier output stages. Because the part is non-inverting, it can drop into circuits designed around the ubiquitous TC4420 footprint without changing the logic polarity, making it a popular first-pass driver in power designs.
MIC4426YN - Dual 1.5A Inverting MOSFET Driver | Microchip
The Microchip (Micrel) MIC4426YN is a dual 1.5A-peak low-side MOSFET gate driver fabricated on a BiCMOS/DMOS process for low power consumption and high efficiency, supplied in an 8-pin PDIP (0.300 inch, 7.62 mm) through-hole package. It delivers two inverting drivers that translate TTL or CMOS input logic levels to output voltage swings within 25 mV of either the positive supply rail or ground, and it operates from a 4.5 V to 18 V supply with a typical propagation delay of 17 ns. What is a low-side MOSFET driver? A low-side gate driver is a power-management IC that sits between a low-power logic signal (microcontroller PWM output, comparator, or logic gate) and the gate of a power MOSFET or IGBT. Because the driver can source and sink large peak currents (1.5 A in the case of the MIC4426YN), it charges and discharges the MOSFET gate capacitance far faster than the logic device can on its own, slashing switching losses and reducing heat in switch-mode power supplies, motor half-bridges, and pulsed-load circuits. In the broader taxonomy, low-side drivers are a sub-category of gate drivers, which sit under power management and semiconductor ICs. Key features include 1.5 A peak output current per channel, matched rise and fall times for low distortion, 25 mV maximum output offset from either rail, an input threshold that is independent of supply voltage, 6 pF typical input capacitance, and -5 V ESD protection on logic inputs. The driver withstands up to 500 mA of reverse current in either polarity without latching and survives 5 V noise spikes on the ground pin, giving it the ruggedness expected of an industrial-grade driver. Architecturally, the MIC4426YN uses a BiCMOS/DMOS output stage that combines bipolar input logic with DMOS power transistors. This topology achieves the 25 mV rail-to-rail swing that comparable bipolar drivers cannot reach - bipolar parts typically swing only to within 1 V of the rails - and it does so while drawing microamp quiescent current. Two independent inverting channels share bias and protection but otherwise operate without mutual interference. Typical applications include switch-mode power supply (SMPS) synchronous-rectifier gates, DC-DC converter MOSFET drive, motor-driver low-side switches, solenoid and relay coil drivers, line drivers for pulse transformers, and level-shifted interfaces to power MOSFETs in industrial and telecom equipment. The 18 V supply ceiling comfortably drives standard 12 V logic-level and -10 V/-12 V threshold MOSFETs. For design success, place a 1 uF or larger low-ESR bypass capacitor within 1 cm of the VDD pin to keep the high-peak current transients off the upstream supply; otherwise the driver can pull the rail low enough to reset adjacent logic. Keep input traces short and away from switching nodes to avoid false triggering from drain-voltage coupling. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, datasheet-derived specifications, and practical design notes that go beyond what the manufacturer datasheet alone provides.
MIC4451YN - 12A Inverting Low-Side MOSFET Driver | Microchip
The Microchip Technology MIC4451YN is a CMOS inverting low-side gate driver that delivers 12 A peak output current in an 8-pin PDIP through-hole package. It accepts logic-level inputs from 2.4 V up to the supply rail (V_S) and operates from a 4.5 V to 18 V supply. The MIC4451 inverts its input and is offered alongside the non-inverting MIC4452, both rated for 12 A peak sink/source and an output resistance of 0.8 ohm. A low-side gate driver is a power-management IC that sits between a low-power logic controller (microcontroller, FPGA, gate-driver logic output) and the gate of a high-current MOSFET or IGBT. Its purpose is to translate a weak 3.3 V or 5 V logic signal into a strong, fast 0-12 V gate-drive pulse capable of switching large power transistors in nanoseconds, thereby reducing switching losses and avoiding the shoot-through caused by slow gate transitions. Low-side MOSFET drivers -> gate drivers -> power management ICs -> semiconductor devices is the standard taxonomy for this category. Key features of the MIC4451YN include 12 A peak output drive, a low 0.8 ohm output impedance for fast edges, 4.5 V to 18 V supply operation, and proprietary input circuits that tolerate negative input swings down to -5 V without latch-up damage. Internal ESD protection, thermal shutdown, and latch-up immunity make the part suitable for harsh industrial environments. The bipolar/CMOS/DMOS process achieves high peak current in a small die while keeping quiescent supply current modest. Architecture-wise, the MIC4451YN combines a CMOS input stage with a DMOS push-pull output stage, allowing high peak currents without external boost capacitors or speed-up networks. Typical rise/fall times of 20-40 ns into 1000 pF loads make the driver fast enough to switch most TO-220 and TO-247 power MOSFETs efficiently. The device's wide V_S range also makes it compatible with both 5 V and 12 V logic-level designs and with 12 V/24 V industrial supply rails. Typical applications include switch-mode power supply (SMPS) gate drives, motor-driver half-bridge low-side stages, solenoid and relay drivers, DC-DC converter synchronous-rectifier drives, and pulse transformer drivers. The 12 A peak capability is sufficient to switch the largest discrete MOSFETs in sub-1 kW power stages without external discrete buffer transistors. When designing with this part, place a 1 uF low-ESR bypass capacitor directly across V_S and GND to handle the high di/dt of the output stage, and keep the gate-drive loop area minimal to limit ringing. The inverting topology means the MOSFET is ON when the logic input is LOW - verify this against your control firmware to avoid shoot-through in half-bridge configurations. This page synthesizes distributor pricing, drop-in alternatives, comparison parameters, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for part selection.
MIC4452ZT - 12A Non-Inverting Low-Side MOSFET Driver | Microchip
The Microchip Technology MIC4452ZT is a non-inverting, low-side CMOS MOSFET gate driver capable of 12 A peak output from a 4.5 V to 18 V supply. It is packaged in a five-lead TO-220 with tab and is supplied in tube packaging. The device uses a bipolar, CMOS, and DMOS process to provide efficient gate charging for power MOSFETs in demanding switching circuits. A MOSFET gate driver is a specialized power-management IC that converts a low-current logic command into the high peak-current charge and discharge pulses required by a power MOSFET gate. In the broader hierarchy, the MIC4452ZT is a gate driver, then a power MOSFET driver, a power management IC, and a semiconductor. Low-side placement means the driver sits on the same supply side as the MOSFET source referenced to ground. Key verified characteristics include a 12 A peak output, low-side configuration, non-inverting input operation, and approximately 15 ns propagation delay. The manufacturer states that MIC4451 and MIC4452 accept any logic input from 2.4 V up to the supply voltage without external speed-up capacitors or resistor networks. This simplifies control interfaces across different logic-voltage domains. The CMOS output stage can charge and discharge large MOSFET gates rapidly, reducing switching transition time and associated conduction or switching losses. Its 12 A peak capability provides a substantial drive-current margin over the average gate current required during switching. The MIC4452 is the non-inverting member of the family, whereas MIC4451 uses an inverting input configuration. Typical uses include DC motor control, power-converter switching, load drivers, and general high-current MOSFET switching. The TO-220-5 construction also offers a larger thermal path than small surface-mount driver packages, although exact junction-temperature and thermal-resistance limits must be taken from the manufacturer datasheet. Designers should verify absolute maximum voltage, input thresholds, output behavior, and thermal conditions against the official datasheet before production use. Gate resistance, dead time, layout inductance, and the selected MOSFET remain critical to switching performance. The verified material does not provide complete pricing or a complete pin-level mapping, so those details are marked as needed rather than inferred.
MIC47100-1.2YML - 1A Low-VIN LDO, 1.2V Fixed | Microchip
The Microchip MIC47100-1.2YML is a 1 A high-speed, low-VIN LDO linear regulator that delivers a fixed 1.2 V output from input voltages between 1 V and 3.6 V, packaged in an 8-lead 2 mm × 2 mm VDFN (MLF) thermally-enhanced MLP footprint. It combines a 80 mV typical dropout, sub-bandgap reference architecture and excellent transient response into one of the smallest 1 A LDO footprints available. An LDO (Low-Dropout) linear regulator is a member of the linear regulator family that maintains a regulated output even when VIN approaches VOUT. LDOs sit below switching regulators in the power management hierarchy but above simple Zener shunts, offering the lowest noise and fastest transient response at the cost of efficiency. The MIC47100-1.2YML belongs to the high-current, low-VIN segment specifically designed to follow a lower-voltage switching converter and provide the final, clean rail. The headline specifications include 1 A continuous output current, 1.2 V fixed output (±2 % initial accuracy), 80 mV dropout at 1 A, stable operation with only a 1 µF ceramic output capacitor, and an active-high enable pin for sequencing. Thermal performance is enabled by the exposed-pad VDFN package which keeps junction temperatures manageable even at the device's 1 A rating without external heatsinking. Architecturally, the MIC47100-1.2YML uses a P-channel MOSFET pass element and an internal sub-bandgap reference that allows VIN as low as 1 V while still regulating 1.2 V out - a combination impossible with conventional bandgap designs. Internal soft-start, current limit and thermal shutdown complete the protection suite. Typical applications include FPGA/CPLD core voltage rails, ASIC point-of-load supplies, networking SoC auxiliary rails, DDR memory termination, DSP core supplies, and any board that needs a quiet, post-switcher 1.2 V rail. The 1 µF ceramic-only stability eliminates bulky tantalum or polymer capacitors in space-constrained designs. Designers should pay attention to PCB layout: the exposed pad must be soldered to a sufficient copper area (a minimum of 25 mm² is recommended) to achieve rated thermal performance, and the input capacitor should be placed within 5 mm of the VIN pin to control input impedance during transients. This page consolidates distributor pricing, same-family and cross-brand drop-in alternatives, and engineering notes - information not aggregated in a single place in the manufacturer datasheet, giving engineers faster decisions when sourcing a low-VIN, 1 A 1.2 V LDO.
MIC47100YML-TR - 1A Low-VIN LDO Regulator | Microchip | 8-MLF
The Microchip Technology MIC47100YML-TR is a high-speed, low-VIN low-dropout (LDO) linear regulator that delivers up to 1A of output current from a 1V to 3.6V input rail, packaged in an 8-pin 2 mm × 2 mm MLF® (also marketed as DFN) with an exposed pad for thermal dissipation. 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. LDOs sit within the broader hierarchy of linear regulators, themselves a sub-family of voltage regulators and ultimately part of the power management IC (PMIC) category. Because they burn the excess VIN−VOUT as heat, LDOs add no switching noise to the rail - making them the default choice for point-of-load supplies that follow a switching pre-regulator. Key features of the MIC47100 include an adjustable output range from 0.8V to 2V (the YML variant) plus fixed-voltage members, an ultra-low 80 mV typical dropout at full 1A load, and stability with only a 1 µF ceramic output capacitor - eliminating the bulky tantalum or electrolytic capacitors required by older LDOs. The part also integrates a single active-high enable pin for sequenced power-up and a "zero off-mode-current" shutdown state, allowing downstream battery savings in portable systems. Architecturally, the MIC47100 uses a high-bandwidth pass element and a precision bandgap reference to deliver fast transient response to load steps, which is critical for powering modern FPGAs, ASICs, and high-speed digital logic. The wide VIN range (down to 1V) lets the part regulate point-of-load rails directly from a 1.2V or 1.5V intermediate bus, removing an extra regulator stage. Typical applications include FPGA/ASIC core and I/O voltage rails in networking switches, DDR memory termination supplies, portable/handheld point-of-load regulation, industrial single-board computers, and any board that needs a clean, low-noise 1A rail generated from an existing low-voltage bus. When designing with the MIC47100YML-TR, keep input-to-output headroom below 3.6V and place the 1 µF ceramic input/output capacitors as close to the IC as possible. The exposed pad must be soldered to a sufficient ground copper pour to keep junction temperature within the -40 °C to +125 °C operating range. This page synthesizes distributor pricing, same-brand and cross-brand alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers an actionable reference for selecting the MIC47100YML-TR.
MIC5206-3.0YM5-TR - 150mA 3.0V Fixed LDO | Microchip Technology
The Microchip Technology MIC5206-3.0YM5-TR is a 150 mA fixed-output 3.0 V low-dropout (LDO) linear regulator housed in a 5-pin SOT-23-5 surface-mount package. It features an ultra-low dropout voltage of 17 mV (typical) at light loads and 165 mV at 150 mA, with 600 µA (typical) ground current at 100 mA output, and ±1 % initial output voltage accuracy. The -3.0YM5-TR variant is the fixed 3.0 V output ordering code in the MIC5206 series, supplied on a 3,000-piece tape-and-reel. 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, eliminating the need for a step-down switching pre-converter in many low-headroom applications. In the broader system hierarchy, the LDO sits inside the linear regulator class, which itself belongs to the voltage regulator family and ultimately the power management IC (PMIC) category. LDOs are favored over switching converters where low noise, small board area, and fast transient response outweigh efficiency concerns. Key features of the MIC5206-3.0YM5-TR include very low ground current, a logic-compatible active-high enable/shutdown input, an internal undervoltage monitor, thermal shutdown, and current-limit protection. The device requires only 1 µF of output capacitance for stability when the ESR is in the recommended range, simplifying BOM and layout. The SOT-23-5 footprint exposes a tab tied to ground for improved thermal dissipation in a compact package. Architecturally, the MIC5206 uses a PNP pass transistor topology, which gives it the low-dropout characteristic that older NPN regulators could not achieve. The reference, error amplifier, and feedback network are trimmed at the factory to deliver better than 1 % initial accuracy on the fixed -3.0 V output code, and a flag output indicates an undervoltage condition for system monitoring. Typical applications include powering microcontroller core rails, real-time-clock (RTC) backup supplies, post-regulation after a switching converter, USB peripheral power, and battery-powered handheld electronics. The enable pin allows the host microcontroller to shut the regulator down for sleep-mode current savings, while the undervoltage flag supplies reset signaling. Compared with a buck converter, the MIC5206-3.0YM5-TR adds no switching noise to the rail but does dissipate (VIN - 3.0 V) × IOUT as heat, so reserve thermal headroom in the layout. When designing with this part, place the input/output 1 µF ceramic capacitors as close as possible to the IN and OUT pins and ensure the enable pin is driven by a logic-level source, not left floating. The datasheet also recommends keeping the junction temperature below 125 °C for reliable long-term operation, which usually requires less than ~250 mW dissipation in the SOT-23-5 footprint on a standard 1 oz copper 2-layer board. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, with citations back to the original Microchip datasheet and current distributor listings as of 2026-10-16.
MIC5207-5.0YM5-TR - 180mA 5V Fixed LDO Regulator | Microchip
The Microchip Technology MIC5207-5.0YM5-TR is a 180 mA fixed-output low-dropout (LDO) linear regulator delivering a precise 5.0 V output from a 2.5 V to 16 V input rail, housed in a 5-pin SOT-23-5 surface-mount package. It features a typical dropout voltage of 165 mV at 150 mA load, ultra-low ground current of 720 µA at 100 mA, and initial output accuracy better than 3%. A reference bypass pin is included to further reduce output noise for noise-sensitive analog loads. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only marginally higher than the output voltage. LDOs sit within the broader hierarchy of voltage regulators → power management ICs → semiconductor devices. Unlike switching regulators, LDOs introduce no switching noise but dissipate (VIN - VOUT) × IOUT as heat, making them preferred for low-current, low-noise analog rails in battery-powered and portable systems. Key features include CMOS/TTL-compatible enable input for power sequencing, reversed-battery protection, internal current limiting, and thermal shutdown. The reference bypass pin (BYP) connects an external capacitor to lower output noise well below the level of a conventional LDO, suiting precision analog and RF applications. The MIC5207 series is offered in both fixed (1.5V–5.0V) and adjustable versions. The regulator uses a PNP pass transistor architecture with a low-noise reference and bandgap, optimized for hand-held and battery-powered devices. The 5-pin SOT-23-5 footprint is industry standard and supported by Microchip's evaluation boards, simplifying PCB integration. Quiescent current remains low across load, an important metric for sleep-mode current budgets in portable equipment. Typical applications include USB peripherals, wireless dongles, handheld instruments, RFID readers, cellular telephones, and battery-powered sensor modules. The fixed 5.0 V output is convenient for MCU rails, Bluetooth/Wi-Fi module supplies, and ADC reference buffering in space-constrained designs. Design tip: keep trace lengths from IN and OUT to their respective bypass capacitors short to maintain stability and minimize noise coupling. For lowest noise, place a 10 nF to 100 nF capacitor on the BYP pin. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
MIC5209-3.3YS - 500mA 3.3V Fixed LDO Regulator SOT-223 | Microchip
The Microchip Technology MIC5209-3.3YS is a 500 mA low-noise low-dropout (LDO) linear regulator with a fixed 3.3 V output, packaged in a 3-pin SOT-223-3 (TO-261-4) package. It accepts input voltages from 2.5 V to 16 V, achieves a typical dropout of 10 mV at light loads and less than 500 mV at full 500 mA load, and provides output voltage accuracy better than 1 %. The MIC5209-3.3YS is specifically designed for handheld and battery-powered applications where long battery life and small PCB footprint are critical. An LDO (Low-Dropout) regulator is a type of linear voltage regulator that maintains a stable, accurate output voltage even when the input-to-output voltage differential is very small. Within the broader power-management integrated circuit (PMIC) hierarchy, LDOs sit beneath DC-DC converters and switching regulators as the low-noise, fast-transient alternative used when the input voltage is only slightly above the desired rail. LDOs add no switching ripple, but dissipate the voltage difference as heat. Key features of the MIC5209-3.3YS include reversed-battery protection, internal current limiting, overtemperature shutdown, and an ultra-low-noise reference architecture. The SOT-223-3 package exposes a metal tab that doubles as both pin 4 (connected to VOUT) and a thermal pad, allowing the part to sustain its 500 mA continuous rating without external heatsinking on typical 1 oz copper PCB pours. The internal architecture is a classic P-channel pass-MOSFET LDO with a bandgap reference and error amplifier. The P-channel element is why the dropout voltage is so low and why the device can survive reversed battery polarity (input more negative than ground). Stability is maintained with a small 1 µF ceramic output capacitor, simplifying BOM cost and board area versus older LDO generations that required tantalum or large electrolytic output caps. Typical applications include USB peripherals, microcontroller core or I/O rails, GSM modem power supplies, post-regulation after a switching converter, battery chargers, and instrumentation. The 3.3 V fixed output makes the MIC5209-3.3YS a natural fit for 3.3 V MCUs, Bluetooth/Wi-Fi modules, and low-power sensor interfaces where 5 V or 12 V inputs must be dropped down cleanly. A key design tip: keep trace lengths short between the output pin tab and the load, because the SOT-223 tab is the primary power and thermal path. For applications above ~250 mA continuous, increase copper area under the tab to keep junction temperature below 125 °C. Per the Microchip datasheet, the derating begins around 1 W dissipation in free air. This page synthesizes distributor pricing, same-package drop-in alternatives, and design notes drawn from the Microchip datasheet - information not collected in one place on the manufacturer product page.
MIC5209-3.3YS-TR - 500mA 3.3V Low-Noise LDO | Microchip
The Microchip Technology MIC5209-3.3YS-TR is a 500 mA low-noise LDO linear voltage regulator with a fixed 3.3 V output, better than 1% output accuracy, and a dropout voltage of typically 10 mV at light loads and less than 500 mV at full 500 mA load, housed in a SOT-223-3 (SOT-223, 3-pin plus tab) surface-mount package. An LDO (low-dropout regulator) is a type of linear voltage regulator that maintains a regulated output voltage even when the input supply is only slightly above the output. Within the power management IC hierarchy, LDOs sit downstream of switching converters or battery rails, providing clean, low-noise point-of-load regulation for analog and digital loads. Key features of the MIC5209-3.3YS-TR include 500 mA output current capability, ultra-low dropout for extended battery runtime, low ground current to prolong battery life in hand-held devices, better than 1% output voltage accuracy, and internal protection consisting of reversed-battery protection, current limiting, and overtemperature shutdown. Ultra-low-noise capability is a hallmark of the MIC5209 family. Architecturally, the MIC5209 uses a precision voltage reference and error amplifier driving a PNP pass element, which enables the very low dropout figure. The low quiescent (ground) current is deliberately optimized for battery-powered operation, and the SOT-223 package offers a thermally efficient tab that doubles as the output pin, simplifying PCB thermal design. Typical applications include hand-held and battery-powered instruments, cordless telephones, portable computing and communication devices, electronic scales, and general-purpose point-of-load regulation from 5 V or Li-ion rails down to a 3.3 V logic or analog rail. Design consideration: at 500 mA load with a large input-to-output differential, power dissipation in the SOT-223 package becomes the limiting factor; keep VIN-VOUT small or provide adequate copper area on the tab. This page synthesizes distributor pricing, drop-in alternatives, design notes, and application guidance not found in the manufacturer datasheet.
MIC5219-3.3YM5 - 500mA 3.3V LDO Regulator | Microchip SOT-23-5
The Microchip Technology MIC5219-3.3YM5 is a 500 mA peak-output, fixed 3.3 V low-dropout (LDO) linear regulator housed in a 5-pin SOT-23 surface-mount package. Per the manufacturer datasheet, the MIC5219 family delivers better than 1% output voltage accuracy, ultra-low dropout voltage (typically 10 mV at light loads, less than 500 mV at 500 mA), and reverse-battery protection on the input. The fixed 3.3 V output variant (MIC5219-3.3YM5) eliminates external feedback resistors and simplifies BOM for 3.3 V rails. 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, with dropout voltages much lower than classic 7805-style regulators. LDOs sit within the power management IC hierarchy and trade efficiency for noise: unlike switching regulators, an LDO adds no switching ripple, which is critical for analog and RF subsystems. The MIC5219 family is engineered specifically for battery-powered portable systems where extended runtime, low quiescent current, and low dropout at high peak current are mandatory. Key features include a TTL/CMOS-compatible shutdown/enable input that drops quiescent current nearly to zero when disabled, current limiting, overtemperature shutdown, reversed-battery protection, and an ultra-low-noise option across the family. Output accuracy is better than 1% across line, load, and temperature. Ground current is minimized to prolong battery life, and the small SOT-23-5 footprint enables compact PCB designs. The YM5 industrial temperature grade supports -40 °C to +125 °C operation. Typical applications include USB peripherals and dongles, portable instrumentation, handheld terminals, wireless sensor nodes, post-regulation after switching converters, and any 3.3 V microcontroller or sensor bias rail where low noise and long battery life are priorities. The MIC5219-3.3YM5 also works well as a clean local rail for low-power MCUs such as PIC microcontrollers. When designing with this part, place the input and output bypass capacitors immediately adjacent to the IC with short, wide traces, and respect the absolute maximum input voltage. The shutdown pin can be driven from a GPIO for sequenced power-up in multi-rail systems. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
MIC5233-3.3BM5 - 100mA 36V LDO Regulator 3.3V | Microchip
The Microchip MIC5233-3.3BM5 is a 100 mA, high-input-voltage, low-quiescent-current CMOS LDO regulator with a fixed 3.3 V output, packaged in a 5-pin SOT-23 (M5). The MIC5233 family is engineered to deliver high accuracy and ultra-low ground current from input rails up to 36 V, making it ideal for multi-cell Li-Ion battery stacks, USB-powered designs, and 12 V/24 V industrial rails. Key electrical headline specifications include 100 mA continuous output current, 450 mV maximum dropout at full load, 2.0% initial output accuracy, and typically 18 µA quiescent current (the 'ultra-low IQ' that distinguishes the MIC5233 family from older Micrel designs). An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable, low-noise output voltage even when the input voltage is only marginally higher than the desired output - the dropout voltage defines this minimum headroom. LDOs belong to the broader class of linear regulators within power management ICs and are preferred over switching regulators in noise-sensitive analog and RF signal paths because they inject no switching ripple into the output rail. Compared with a discrete Zener-plus-pass transistor reference, an integrated LDO like the MIC5233 shrinks the BOM, removes trimming, and provides built-in current limit, thermal shutdown, and reverse-battery protection. The MIC5233 uses a CMOS architecture with a P-channel pass transistor that intrinsically provides reverse-current blocking and zero reverse leakage when the input is shorted to ground. The 5-lead SOT-23 package adds an active-low enable (SHDN) pin, allowing the host MCU to turn off the regulator for power sequencing or to extend battery standby. The MIC5233 is a µCap LDO design, which means the output is stable with a single 2.2 µF ceramic capacitor - no tantalum or large ESR reservoir is required, simplifying PCB layout and shrinking the solution footprint compared to legacy LDOs that needed 10 µF tantalum output capacitors. Typical applications include always-on battery rails in 12 V industrial sensors, USB dongles, multi-cell Li-Ion packs (3-4 cells giving 9-16 V nominal), handheld instruments, and post-regulation downstream of a switching converter to remove switching ripple. Because quiescent current is well under 1 mA even at no load, the MIC5233 suits sleep-mode and IoT endpoints that must minimize sleep current on coin-cell or Li-Ion primary cells. When laying out the PCB, place the 2.2 µF ceramic output capacitor directly across the OUT and GND pins with the shortest trace possible; ESRs below 200 mΩ ensure loop stability. Avoid routing noisy switching traces near the feedback network, and ensure the input trace has sufficient copper width to handle the worst-case 100 mA continuous load without excessive voltage droop. This page synthesizes MIC5233 family datasheet specifications, distributor pricing, drop-in SOT-23-5 alternatives, and practical design notes that are not available on a stock DigiKey or Mouser listing.
MIC5239-5.0YS-TR - 5V 500mA Low-Iq LDO SOT-223 | Microchip
The Microchip Technology MIC5239-5.0YS-TR (ordered as MIC523950YSTR) is a fixed 5V, 500mA low-dropout (LDO) linear voltage regulator in a 4-pin SOT-223 (TO-261AA) package. It operates from input voltages up to 30V with an ultra-low quiescent current of 23uA and a dropout voltage of only 350mV at full load. A low-dropout regulator is a type of linear voltage regulator that maintains a regulated output even when the input voltage is only marginally higher than the output. Within the power management IC hierarchy, the MIC5239 belongs to the LDO family of positive linear regulators, positioned as a high-input-voltage, low-quiescent-current solution that sits between standard linear regulators and full switching converters. Key differentiating specifications include the 30V maximum input rating, which allows direct connection to high-voltage battery rails; the 23uA quiescent current, which minimizes standby drain in keep-alive power circuits; the 350mV dropout at 500mA, enabling efficient post-regulation after a switching converter; and uCap output architecture that is stable with low-ESR ceramic capacitors. Architecturally, the MIC5239 uses a PNP pass element driven by a precision reference and error amplifier. The low quiescent current is achieved through a biased internal supply technique rather than a conventional resistor string, so ground-pin current stays low across the full load range. The fixed 5.0V version integrates the feedback divider internally, eliminating external resistors and reducing BOM count. Typical applications include keep-alive and always-on power in automotive and industrial systems with high-voltage batteries, USB peripheral power where 500mA is required, post-regulation of switching converter rails for noise-sensitive analog circuitry, and battery-powered instrumentation that must sleep at microamp levels. For design, ensure input-to-output headroom stays above the 350mV dropout specification at the actual load current, and place at least 1uF of ceramic output capacitance close to the pin for stability, per the manufacturer datasheet. This page synthesizes distributor pricing as of 2026-10-16, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.
MIC5318-1.8YMT - 300mA 1.8V ULDO Regulator | Microchip | 6-TMLF
The Microchip Technology MIC5318-1.8YMT is a high-performance, single-output ultra-low-dropout (ULDO) linear regulator delivering a fixed 1.8 V output at up to 300 mA from a 2.5 V to 6 V input, housed in a 6-pin 1.6 mm x 1.6 mm Thin MLF (6-TMLF) package. The -1.8 suffix denotes the fixed output voltage; the MIC5318 family also offers -1.2, -1.5, -1.85, -2.5, -2.6, -2.8, -2.85, -3.0, -3.3, and -3.6 V options. The regulator combines low total output noise with high PSRR, making it an ideal solution for RF applications where clean power directly translates to phase noise and signal-to-noise performance. An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. The MIC5318 belongs to the broader category hierarchy: ULDO -> LDO -> linear regulator -> voltage regulator -> power management IC. Compared with a standard NPN LDO, the MIC5318's PMOS pass topology enables an extremely low dropout of typically 90 mV at 300 mA, so a 2.5 V source can still regulate 1.8 V even as the cell discharges. Key differentiating specifications include 300 mA continuous output current, 90 mV typical dropout at full load, 60 dB PSRR at 1 kHz, 30 uVrms output noise, and 2% initial output voltage accuracy. The device tolerates ceramic output capacitors (uCap), requires no external compensation network, and integrates an active-low enable input for power sequencing in multi-rail designs. Thermal shutdown and current-limit protection are built in. Architecturally the MIC5318 uses a PMOS pass transistor paired with a precision bandgap reference and a discrete-loop error amplifier. The 6-TMLF exposed-pad package provides a low thermal resistance of approximately 78 C/W, allowing 300 mA delivery without external heatsinking at moderate VIN-VOUT differentials. Quiescent current is typically 90 uA with logic-low EN. Typical applications include portable and battery-powered devices where board space is critical, image sensors, GPS modules, RF power amplifiers, micro-controller cores, and noise-sensitive analog front ends. The fixed 1.8 V output also suits DDR memory termination rails and low-power MCU I/O supplies. When designing with the MIC5318-1.8YMT, place a 1 uF X5R/X7R ceramic input capacitor as close as possible to VIN and a 1 uF ceramic output capacitor at VOUT; ESR stability is maintained from near zero to 200 mOhm. The exposed pad must be soldered to a copper pour to meet the published thermal resistance. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the standalone manufacturer datasheet, giving procurement and design engineers a single decision-ready reference.
MIC5377YC5 - 150mA Adjustable LDO Regulator | Microchip | SC-70-5
The Microchip Technology MIC5377YC5 is a high-performance, general-purpose adjustable low-dropout (LDO) linear regulator that delivers up to 150 mA of output current in an ultra-compact 5-pin SC-70 package. The device accepts input voltages up to 5.5 V and supports an adjustable output range of approximately 1.0 V to 5.0 V set by an external resistor divider. Key specifications include a low dropout voltage, low quiescent current, and high output accuracy, making it a strong fit for space-constrained, battery-powered designs. According to the Microchip product page and distributor listings (DigiKey, Mouser, LCSC), the part is offered as MIC5377YC5-TR on a 3,000-piece reel. An LDO (low-dropout) linear regulator is a type of linear voltage regulator that maintains a stable, low-noise output voltage even when the input voltage approaches the output voltage, with a dropout voltage typically much lower than older standard regulators. Within the broader power-management hierarchy, an LDO belongs to the family of linear regulators, which in turn are a subclass of voltage regulators, themselves part of the power-management integrated circuit (PMIC) category of semiconductors. LDOs are valued over switching regulators in applications where switching ripple and EMI must be minimized, and the small VIN-VOUT differential produces acceptable thermal dissipation. Key features of the MIC5377YC5 include 150 mA continuous output current, low quiescent current to maximize battery life, internal soft-start circuitry, current-limit protection, and thermal-shutdown protection. The enable pin (where applicable in the MIC5376/8 family) supports an auto-discharge resistive load that pulls the output down when disabled, eliminating residual charge on downstream loads. The 5-pin SC-70 package is one of the smallest regulator footprints in the industry, ideal for hand-held, wearable, and IoT form factors where every square millimeter of PCB area is at a premium. Technically, the MIC5377 uses a PNP pass-element architecture that delivers low dropout and fast transient response. Stability is achieved with small ceramic input and output capacitors (typically 1 µF X7R), simplifying BOM cost and PCB layout. The adjustable variant allows designers to set any output voltage within its supported range, providing flexibility across multi-rail systems. Typical applications include portable and wearable electronics, IoT sensor nodes, wireless modules, hand-held instruments, and post-regulation stages after switching converters. When designing with this part, ensure the input voltage stays within the absolute maximum rating, use ceramic bypass capacitors close to the pins, and verify that the worst-case power dissipation (PD = (VIN - VOUT) × IOUT) stays within the SC-70 thermal envelope. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet alone.