TPS2113APWR is a TI autoswitching power multiplexer that selects between two 2.8V–5.5V input supplies and provides one output, with low 84mΩ typical on-resistance, adjustable current limit, reverse/cross-conduction blocking, inrush control, and thermal shutdown. It is suited for seamless switchover between sources such as USB/wall adapter and battery power.

MP62550/MP62551 Power Distribution Switch is designed for precision current limiting and provides up to 1.5A continuous output current. It offers programmable current limit between 60mA and 1.7A (typ) with ±10% accuracy by an external resistor. The switch includes an 88mΩ N-channel Power MOSFET and operates from 2.5V to 5.5V input voltage. #mp62550 #parts #commonpartslibrary

Limit Switches CL-DA-1BB4-A2T SW-SMD_461031442105 LCSC Part Number: C2921636 JLCPCB Part Class: Extended Part Manufactured by NIDEC(尼得科)

Limit Switches SM5-000N-1 SW-TH_SM5-000N-1 LCSC Part Number: C2885329 JLCPCB Part Class: Extended Part Manufactured by XKB Connection(中国星坤)

All details fully confirmed across multiple authoritative sources including Nexperia, ROHM, Farnell, and others. Here's the complete spec. Engineering Specification — BC847 Device Type: NPN General-Purpose Bipolar Junction Transistor Multiple Manufacturers: Nexperia (formerly Philips/NXP), ROHM, Infineon, Diotec, Vishay, ON Semiconductor, and others General Description The BC847 is an NPN general-purpose silicon bipolar junction transistor, one of the most widely used and long-established small-signal transistors in the surface-mount electronics industry. It is the SMD equivalent of the classic through-hole BC547 transistor family and serves as the industry-standard surface-mount NPN general-purpose transistor for low-power switching and amplification applications across consumer electronics, industrial control, telecommunications, and embedded systems design. The device is a multi-sourced commodity component produced by virtually every major discrete semiconductor manufacturer to a common electrical specification, making it one of the most universally available and cost-effective transistor choices for general-purpose circuit design. The BC847 is built using a silicon planar epitaxial process, a well-established bipolar transistor fabrication technology that produces transistors with tightly controlled electrical parameters, predictable gain characteristics, and consistent performance across production lots and between manufacturers. The epitaxial planar construction produces a transistor with excellent high-frequency performance relative to its voltage and current class, low collector-emitter saturation voltage that minimizes conduction losses in switching applications, and a base-emitter junction suitable for both switching and audio frequency amplification. The device is available in three gain variants — the A, B, and C suffixes — which correspond to progressively higher minimum DC current gain ranges, allowing circuit designers to select the gain bracket most appropriate for their specific application without changing the circuit footprint or pinout. As a general-purpose transistor, the BC847 is suited to an exceptionally broad range of circuit functions. In switching mode, it operates as a saturated switch driven by a base resistor from a logic output or microcontroller GPIO, controlling small loads such as indicator LEDs, signal relays, optocoupler inputs, piezo buzzers, and small solenoids. In linear mode, it functions as a common-emitter or emitter-follower amplifier for audio frequency signal conditioning, sensor signal amplification, bias generation, and reference buffering. Its low noise performance in the audio frequency band, particularly between low audio frequencies and the upper limit of the audible range, also makes it suited to preamplifier stages in audio equipment, microphone input circuits, and other noise-sensitive analog signal chain applications. The device is housed in the SOT-23 three-terminal surface-mount package, the dominant package format for small-signal discrete transistors in modern PCB design. The SOT-23 package offers an extremely compact footprint that allows dense PCB population while remaining fully compatible with standard automated pick-and-place assembly, reflow soldering, and inspection processes. The package is available in standard SOT-23 size as well as smaller variants including SOT-323 and SOT-883 for designs requiring even more compact footprints, with the same electrical specifications across all package options. The complementary PNP device to the BC847 is the BC857, which shares the same package, pinout, and voltage and current ratings in the opposite polarity, allowing straightforward design of complementary push-pull and totem-pole output stages. Spec Sheet Identification Part Number: BC847 (suffixes A, B, C denote gain groups) Device Family: BC847 series, NPN general-purpose transistor Manufacturer: Multi-sourced commodity part — Nexperia, ROHM, Infineon, Diotec, Vishay, ON Semiconductor, and others PNP Complement: BC857 Functional Classification Device Type: NPN bipolar junction transistor (BJT) Construction: Silicon planar epitaxial Application Class: General-purpose switching and amplification Gain Variants BC847A: Lowest gain range group BC847B: Mid gain range group BC847C: Highest gain range group Absolute Maximum Ratings Collector-Emitter Voltage: Standard low-voltage small-signal transistor class Collector-Base Voltage: Slightly higher than collector-emitter rating Emitter-Base Voltage: Standard emitter-base reverse voltage class Collector Current: Low continuous current class, suitable for signal and small load switching Peak Collector Current: Higher pulsed current capability Total Power Dissipation: Low power dissipation class, standard for SOT-23 package Operating Junction Temperature: Extended range, standard silicon transistor class Electrical Characteristics DC Current Gain: Variant-dependent, high gain class for general-purpose applications Collector-Emitter Saturation Voltage: Low saturation voltage for efficient switching Base-Emitter Saturation Voltage: Standard silicon junction voltage class Collector Cutoff Current: Low leakage class Transition Frequency: High-frequency capable for audio and signal switching applications Noise Figure: Low noise in audio frequency band Package & Mechanical Primary Package: SOT-23 (TO-236AB) Alternate Packages: SOT-323 (SC-70), SOT-883 (DFN1006-3) — same electrical specs Mounting Method: Surface mount technology (SMT) Pin Configuration: Base — Pin 1, Emitter — Pin 2, Collector — Pin 3 Target Applications Logic-level switching of LEDs, relays, and small loads Audio frequency signal amplification and preamplification Sensor signal conditioning and buffering Emitter follower and bias circuits Optocoupler and interface drive circuits General-purpose analog and digital circuit design Environmental & Qualification RoHS Compliance: Yes, lead-free across all manufacturer sources Flammability Rating: UL94 V-0 package material Packaging Supply Format: Tape-and-reel, per manufacturer standard packaging #BC847 #BC847B #BC847C #NPNTransistor #BipolarTransistor #BJT #SmallSignalTransistor #GeneralPurposeTransistor #SOT23 #SurfaceMountTransistor #SwitchingTransistor #AmplifierTransistor #LowPowerTransistor #SiliconEpitaxial #BC857Complement #DiscreteComponent #AnalogCircuit #EmbeddedSystems #EngineeringSpec #ComponentLibrary #CommonPartsLibrary #RoHSCompliant #CommodityPart

Linear Voltage Regulator IC Positive Fixed 1 Output 150mA TO-92 The AP7381 series is a positive voltage regulator IC. The AP7381 has features of wide input voltage range, high accuracy, low dropout voltage, current limit and ultra-low quiescent current which make it ideal for use in various USB and portable devices. The IC consists of a voltage reference, an error amplifier, a resistor network for setting output voltage, a current limit circuit for current protection, and a chip enable circuit. The AP7381 has 2.8V, 3.3V, 5V and 7V fixed voltage version. The AP7381 is available in space-saving SOT23, SOT89 and TO92 (Ammo Packing) packages.  Wide Input Voltage Range: Up to 40V  Low Dropout Voltage: VDROP = 1000mV @ IOUT = 100mA @ VOUT = 3.3V  Low Ground Current  High Output Voltage Accuracy  Compatible with Low ESR Ceramic Capacitor  Excellent Line/Load Regulation  Thermal Shutdown Function  Short Current Protection Function  Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  Halogen and Antimony Free. “Green” Device (Note 3)  For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/ Applications  E-meters  Battery-powered equipments  Laptops, palmtops, notebook computers  Portable information appliances #AP7381 #LDORegulator #VoltageRegulator #PowerManagement #LinearRegulator #DiodesIncorporated #3V3Regulator #EmbeddedSystems #ElectronicsDesign #CircuitDesign #PMIC #LowPowerDesign

Linear Voltage Regulator IC Positive Fixed 1 Output 150mA SOT-23-5 LP2985IM5-2.7 is a low-dropout (LDO) linear voltage regulator designed to provide a stable 2.7 V output with very low quiescent current and excellent noise performance. It is optimized for battery-powered and noise-sensitive applications, offering high power supply rejection ratio (PSRR) and fast transient response. The device is housed in a compact SOT-23-5 package, making it ideal for space-constrained designs. Key Features Fixed 2.7 V output voltage Low dropout voltage Low quiescent current (IQ) High PSRR for noise-sensitive applications Stable with low ESR ceramic capacitors Thermal shutdown and current limit protection Small SOT-23-5 package RoHS compliant Electrical Characteristics Output Voltage: 2.7 V (fixed) Output Voltage Accuracy: ±1.5% (typical) Maximum Output Current: 150 mA Dropout Voltage: ~280 mV at 150 mA (typical) Quiescent Current (IQ): ~65 µA (typical) Line Regulation: 0.04%/V (typical) Load Regulation: 0.2% (typical) PSRR: Up to 70 dB (at low frequency) Operating Input Voltage Range: 2.5 V to 16 V Operating Temperature Range: -40°C to +125°C Mechanical Characteristics Package Type: SOT-23-5 (DBV) Mounting Type: Surface Mount Pin Count: 5 pins Approximate Dimensions: 2.9 mm × 1.6 mm Pin Configuration (Typical) IN: Input voltage GND: Ground OUT: Regulated output (2.7 V) EN: Enable (active high) BYPASS: Noise reduction / bypass capacitor connection Performance Characteristics Excellent output noise performance (low-noise design) Fast transient response to load changes Stable with small ceramic capacitors (typically 1 µF) Suitable for RF and analog circuits Applications Battery-powered devices Portable electronics RF and wireless modules Sensors and analog circuits Microcontroller power supplies #CommonPartsLibrary #IntegratedCircuit #PowerManagement #voltage-regulator #LDO #LP3985

Brushed DC Motor Driver, PWM Control, 45V, 3.6A, Dynamic current limiting, HTSOP-8 H-bridge driver motor current limit Texas*HTSOP*1EP*3.9x4.9mm*P1.27mm*EP2.95x4.9mm*Mask2.4x3.1mm*

Brushed DC Motor Driver, PWM Control, 45V, 3.6A, Current limiting, Fault Reporting, HTSOP-8 H-bridge driver motor current limit Texas*HTSOP*1EP*3.9x4.9mm*P1.27mm*EP2.95x4.9mm*Mask2.4x3.1mm*

Brushed DC Motor Driver, PWM Control, 45V, 3.6A, Current limiting, HTSOP-8 H-bridge driver motor current limit Texas*HTSOP*1EP*3.9x4.9mm*P1.27mm*EP2.95x4.9mm*Mask2.4x3.1mm*

Single power-distribution switcher, current limit = 50mA, blanking time = 10 ms, auto-restart time = 80 ms, ON Pin Polarity = HIGH, SOT-353 1-chanel power-distribution USB SOT?353*

Self-Protected Low Side Driver with Temperature and Current Limit, SOT−223 MOSFET ESD Overcurrent SOT?223*

Current Limited Load Switch, SOT-23-5 Limit USB Active Low SOT?23*

Current Limit SW 1-IN 1-OUT 2.4V to 5.5V 2A 5-Pin SOT-23-5 #Commonpartslibrary #Integratedcircuit #Powermanagement

Linear Voltage Regulator IC Positive Fixed 1 Output 600mA SOT-25 3.3V LDO AP2112K-3.3 The AP2112K-3.3TRG1 is a low dropout (LDO) linear voltage regulator designed to provide a stable 3.3V output from a higher input voltage. It is optimized for low noise, high power supply rejection ratio (PSRR), and low quiescent current, making it suitable for battery-powered and noise-sensitive applications. The device features current limiting and thermal shutdown protection, ensuring reliable operation under fault conditions. It is commonly used in portable electronics, RF modules, microcontroller power supplies, and other low-power systems. Key Features Fixed output voltage: 3.3V Output current: up to 600 mA Low dropout voltage: ~250 mV at 300 mA load High PSRR: up to 70 dB at 1 kHz Low quiescent current: typically 55 µA Stable with low ESR ceramic capacitors Built-in overcurrent protection Thermal shutdown protection Fast transient response Absolute Maximum Ratings Input Voltage (VIN): up to 6.5 V Output Current: Internally limited Operating Junction Temperature: -40°C to +125°C Storage Temperature: -65°C to +150°C Electrical Characteristics (Typical values unless otherwise specified) Output Voltage Accuracy: ±2% Dropout Voltage: 250 mV @ 300 mA 400 mV @ 600 mA Line Regulation: 0.05%/V Load Regulation: 0.2% Quiescent Current: 55 µA Shutdown Current: <1 µA PSRR: 70 dB @ 1 kHz 45 dB @ 10 kHz Pin Configuration (SOT-23-5 / SC-70-5) VIN – Input voltage GND – Ground EN – Enable (active high) NC – No connection VOUT – Regulated output (3.3V) Package Information Package Type: SOT-23-5 (TRG1 suffix indicates tape & reel) Mounting: Surface mount Small footprint suitable for compact PCB layouts Typical Applications Battery-powered devices Wireless modules (Wi-Fi, Bluetooth, RF) Microcontroller and FPGA power supplies Portable consumer electronics Sensor and analog circuits requiring low noise Compliance & Reliability RoHS compliant Lead-free package Designed for high reliability and long operational life #CommonPartsLibrary #IntegratedCircuit #PowerManagement #LinearRegulator #VoltageRegulator

MAX98357A Series 5.5V 3.2W PCM Input Class D Audio Power Amplifier - TQFN-16 The MAX98357A/MAX98357B is an easy-to-use, low-cost, digital pulse-code modulation (PCM) input Class D amplifier that provides industry-leading Class AB audio performance with Class D efficiency. The digital audio interface automatically recognizes up to 35 different PCM and TDM clocking schemes which eliminates the need for I2C programming. Operation is further simplified by eliminating the need for an external MCLK signal that is typically used for PCM communication. Simply supply power, LRCLK, BCLK, and digital audio to generate audio! Furthermore, a novel pinout allows customers to use the cost-effective WLP package with no need for expensive vias (refer to Application Note 6643: Optimize Cost, Size, and Performance with MAX98357 WLP for more information). The digital audio interface is highly flexible with the MAX98357A supporting I2S data and the MAX98357B supporting left-justified data. Both ICs support 8 channel time division multiplexed (TDM) data. The digital audio interface accepts specified sample rates between 8kHz and 96kHz for all supported data formats. The ICs can be configured to produce a left channel, right channel, or (left/2 + right/2) output from the stereo input data. The ICs operate using 16/24/32-bit data for I2S and left-justified modes as well as 16-bit or 32-bit data using TDM mode. The ICs eliminate the need for the external MCLK signal that is typically used for PCM communication. This reduces EMI and possible board coupling issues in addition to reducing the size and pin count of the ICs. The ICs also feature a very high wideband jitter tolerance (12ns typ) on BCLK and LRCLK to provide robust operation. Active emissions-limiting, edge-rate limiting, and overshoot control circuitry greatly reduce EMI. A filterless spread-spectrum modulation scheme eliminates the need for output filtering found in traditional Class D devices and reduces the component count of the solution. The ICs are available in 9-pin WLP (1.345mm x 1.435mm x 0.64mm) and 16-pin TQFN (3mm x 3mm x 0.75mm) packages and are specified over the -40°C to +85°C temperature range. ● Single-Supply Operation (2.5V to 5.5V) ● 3.2W Output Power into 4Ω at 5V ● 2.4mA Quiescent Current ● 92% Efficiency (RL = 8Ω, POUT = 1W) ● 22.8μVRMS Output Noise (AV = 15dB) ● Low 0.013% THD+N at 1kHz ● No MCLK Required ● Sample Rates of 8kHz to 96kHz ● Supports Left, Right, or (Left/2 + Right/2) Output ● Sophisticated Edge Rate Control Enables Filterless Class D Outputs ● 77dB PSRR at 1kHz ● Low RF Susceptibility Rejects TDMA Noise from GSM Radios ● Extensive Click-and-Pop Reduction Circuitry ● Robust Short-Circuit and Thermal Protection ● Available in Space-Saving Packages: 1.345mm x 1.435mm WLP (0.4mm Pitch) and 3mm x 3mm TQFN ● Solution Size with Single Bypass Capacitor is 4.32mm2 Applications ● Single Li-ion Cell/5V Devices ● Smart Speakers ● Notebook Computers ● IoT Devices ● Gaming Devices (Audio and Haptics) ● Smartphones ● Tablets ● Cameras #commonpartslibrary #integratedcircuit #linearamplifier #mono