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TPS2062CDGNR - Dual 1A USB Power Switch | Texas Instruments
The Texas Instruments TPS2062CDGNR is a dual-channel, current-limited, power-distribution switch designed for USB and other hot-swap applications where heavy capacitive loads and short-circuits may be encountered. It integrates two 70-mΩ high-side N-channel MOSFET switches with independent enable inputs, providing a compact and robust power-switching solution in an 8-pin HVSSOP (DGK) package with exposed thermal pad. The device operates over an input voltage range of 2.7V to 5.5V and supports a continuous load current of 1A per channel, with a fixed current-limit threshold of 1.5A (typical) and an accurate ±20% current-limit tolerance. A power-distribution switch is a type of load switch that provides controlled power delivery to downstream circuits, offering protection against overcurrent, short-circuit, and over-temperature conditions. It sits between the power source and the load, acting as a smart switch that can be enabled or disabled via a control signal. In the system hierarchy, a power-distribution switch is a subset of power management ICs, which also include voltage regulators, DC-DC converters, and battery management devices. The TPS2062C family is specifically optimized for USB ports, where it ensures safe power delivery and protects the host controller from fault conditions. Key features of the TPS2062CDGNR include a fast overcurrent response time of 2 µs (typical), which quickly limits fault current to protect upstream components. The device also provides reverse current blocking, output discharge function, soft-start to reduce inrush current, and under-voltage lockout (UVLO) to ensure proper operation during power-up. Built-in over-temperature protection and short-circuit protection further enhance system reliability. The active-low enable inputs allow for simple logic control, and the 70-mΩ on-resistance minimizes power loss and voltage drop across the switch. Technically, the TPS2062CDGNR uses a constant-current limiting scheme that maintains a safe output current during overload conditions, preventing damage to the switch and the load. The output discharge function actively pulls the output to ground when the switch is disabled, ensuring no residual voltage remains on the load. The soft-start feature limits inrush current when driving capacitive loads, which is critical for USB applications where downstream capacitors can be large. The device is specified for operation over the industrial temperature range of -40°C to +125°C, making it suitable for a wide range of environments. Typical applications include USB ports on computers, hubs, and peripherals, as well as general-purpose power switching in consumer electronics, industrial equipment, and set-top boxes. The dual-channel configuration allows two independent loads to be controlled from a single device, saving board space and cost. The TPS2062CDGNR is also ideal for powering downstream devices in systems that require hot-swap capability, such as docking stations and battery chargers. When designing with this device, ensure that the input and output capacitors are placed close to the pins to minimize parasitic inductance and maintain stable operation. The exposed thermal pad should be soldered to a large copper area on the PCB to enhance heat dissipation, especially when operating at high currents. Additionally, the enable pins should be driven with proper logic levels to avoid unintended switching.
TPS2062DR - Dual 1A USB Power Switch | Texas Instruments
The Texas Instruments TPS2062DR is a dual-channel, current-limited power distribution switch designed for USB and general-purpose power management applications. It integrates two 70-mΩ high-side N-channel MOSFETs, each capable of delivering up to 1 A continuous current, with an input voltage range of 2.7 V to 5.5 V. The device is housed in an 8-pin SOIC (D) package and features an active-low enable input, making it suitable for power sequencing and hot-swap applications. A power distribution switch is a semiconductor device that controls and protects power delivery to downstream loads. It typically includes a high-side MOSFET, current sensing, and protection features such as overcurrent, thermal shutdown, and undervoltage lockout. In a system hierarchy, the TPS2062DR sits between the main power rail and peripheral devices, acting as a smart switch that can be turned on/off via a logic signal while providing fault protection. Key features of the TPS2062DR include a 70-mΩ high-side MOSFET, 1-A continuous current per channel, accurate current limit (1.1 A min, 2.1 A max), thermal and short-circuit protection, undervoltage lockout, deglitched fault report (OC), and a typical rise time of 0.6 ms. The active-low enable input allows for straightforward control from microcontrollers or logic gates. The device operates over a junction temperature range of -40°C to 125°C, making it suitable for industrial and automotive environments. Technically, the TPS2062DR uses a current-limited architecture that ensures safe operation under overload conditions. The accurate current limit prevents excessive current draw, protecting both the switch and the load. The deglitched fault report (OC) provides a clean signal to the host controller, avoiding false triggers from transient currents. The undervoltage lockout ensures the switch remains off until the input voltage is stable, preventing erratic behavior during power-up. Typical applications include USB port power switching, hot-swap power distribution, and power management in consumer electronics, industrial equipment, and networking devices. The dual-channel configuration allows independent control of two loads, making it ideal for applications requiring multiple power domains. When designing with the TPS2062DR, ensure adequate input and output capacitance to maintain stability and minimize voltage transients. Place the device close to the load to reduce parasitic inductance and improve fault response. The active-low enable pin should be pulled up or driven by a logic signal; do not leave it floating.
TPS2115APW - 1.25A, 5.5V Power Mux w/ Status | Texas Instruments
The Texas Instruments TPS2115APW is a 2.8-V to 5.5-V, 84-mΩ, 1.25-A autoswitching power multiplexer (power mux) housed in an 8-pin TSSOP (PW) package. It accepts two input supplies (IN1 and IN2) and delivers a regulated output to a common load with sub-ohm (84 mΩ typical) N-channel MOSFET pass elements per channel. The device features manual and automatic switchover modes, a STATUS output flag, and cross-conduction blocking logic to prevent momentary shorting between the two sources during transitions. A power mux is a category of power-management IC that arbitrates between two or more DC input sources (battery, wall adapter, USB, auxiliary rail) and routes one of them to the load. Within the broader taxonomy, power muxes sit below load switches and above simple ideal-diode OR-ing controllers, combining the low-loss benefits of MOSFET pass elements with intelligent source-selection logic. The TPS2115A family specifically targets systems requiring seamless transitions between a primary and backup supply without brown-outs on the load. Key features of the TPS2115APW include 84 mΩ typical on-resistance per channel, low 0.5 µA standby current, programmable current limiting, inrush current control, thermal shutdown protection, and a wide 2.8 V to 5.5 V operating range on both input rails. The integrated STATUS pin reflects which source is currently active, enabling host-side telemetry in multi-rail systems. Architecturally, the TPS2115APW uses back-to-back N-channel MOSFETs per channel driven by charge-pumped gate drivers. The body-diode reverse-blocking design prevents unintended current flow from a higher-voltage rail into a lower-voltage rail. The control logic implements break-before-make switching with user-programmable switchover thresholds and switching speed. Typical applications include battery-backed-up portable electronics, USB/wall-adapter power switching in handheld terminals, multi-rail industrial sensor nodes, redundancy power OR-ing in 5V systems, and any application requiring glitch-free transitions between two DC sources. When designing with the TPS2115APW, consider that the TSSOP-8 package has a thermal resistance of approximately 150 °C/W; continuous 1.25 A operation at high VIN requires adequate copper pour. The MS pin (mode select) and ILIM pin (current limit) require external component selection to balance inrush vs steady-state behavior. Cross-conduction blocking eliminates the need for external back-to-back FETs, simplifying BOM. This page synthesizes distributor pricing, drop-in alternatives within the TSSOP-8 footprint, and design guidance not found in the manufacturer datasheet alone - giving procurement and design engineers a one-stop reference for source-selection decisions.
TPS2121RUX - 22V 4.5A Priority Power MUX | Texas Instruments
The Texas Instruments TPS2121RUX is a 2.7-V to 22-V, 56-mΩ, 4.5-A priority power multiplexer (power MUX) with seamless switchover, housed in a 12-pin VQFN-HR (RUX) package measuring 2.0 mm × 2.5 mm. It manages two input power sources (IN1 and IN2) and selects one to power a single output (OUT) according to a user-defined priority scheme. The device supports up to 4.5 A continuous load current with an internal 56-mΩ (typical) Rds(on) MOSFET per channel, with adjustable current limit set by an external resistor. A power multiplexer is a load-sharing/redundancy switch that allows a system to draw power from one of two sources with priority logic, automatic switchover, and in-rush control. The TPS2121 belongs to the ORing controller / power MUX / load-switch product hierarchy, sitting between discrete MOSFET ORing designs (anode-to-cathode diodes or ideal-diode controllers) and full PMIC solutions. It integrates dual back-to-back N-channel MOSFETs, priority arbitration, adjustable current limit, soft-start, and seamless fast switchover (< 5 µs) inside a tiny QFN footprint, eliminating dozens of discrete components. Key features include 2.7-V to 22-V operating input range, 56-mΩ per-channel Rds(on), 4.5-A continuous current capability, adjustable current limit (ILIM), seamless switchover within 5 µs, and a logic-controlled priority mode (PR1 = High → IN1 priority; PR1 = Low → IN2 priority). The VQFN-HR-12 (RUX) package has an exposed thermal pad (PowerPAD) for low thermal resistance, supporting up to ~2 W continuous dissipation on a modest PCB copper pour. The device operates over -40 °C to +125 °C junction temperature and is characterized for industrial-grade environments. The architecture uses TI's priority-based power-path control: the device continuously compares IN1 and IN2 voltages against an internal reference (2.5 V typical on PR1) and switches to the higher-priority source when it is valid. During switchover, internal break-before-make control prevents cross-conduction; the output is held up by output capacitance during the brief (~5 µs) transition. The current-limit and soft-start blocks protect against in-rush spikes when a freshly-selected source is brought online. Typical applications include redundant power rails in industrial PLCs and factory automation, backup battery switching in portable medical and IoT devices, USB-C PD source multiplexing, multi-battery Point-of-Sale (POS) terminals, and automatic transfer of AC adapters versus battery in notebook docking stations. The compact 2 mm × 2.5 mm footprint makes it ideal for space-constrained designs that previously required a discrete ORing controller plus two MOSFETs. When designing with the TPS2121, place input and output ceramic capacitors as close as possible to the IC pins (10 µF minimum on IN1, IN2, and OUT recommended) to minimize voltage droop during switchover. Use the PR1 resistor divider to set the VIN1 priority threshold, set ILIM with an external resistor (RILIM = K / ILIM), and provide adequate copper area on the PowerPAD for thermal dissipation. Avoid parallel connection of multiple TPS2121 units - one device per system is standard. This page synthesizes distributor pricing, drop-in alternatives, prioritized selection guidance, and practical PCB layout notes that go beyond a typical manufacturer datasheet summary.
TPS22919-Q1 - 5.5V 1.5A Load Switch SC-70-6 | Texas Instruments
The Texas Instruments TPS22919-Q1 is a self-protected, single-channel load switch with controlled slew rate that integrates an N-channel MOSFET operating from 1.6 V to 5.5 V input, supporting up to 1.5 A of continuous current in a 6-pin SC-70 (DCK) package. The device offers a 90 mOhm typical on-resistance and AEC-Q100 Grade 1 automotive qualification. A load switch is a power management IC that acts as an electronic switch between a power rail and its load, enabling or disabling power delivery under logic control. Load switches sit within the power distribution and protection hierarchy of a system, complementing voltage regulators, e-fuses, and hot-swap controllers. They are used to sequence rails, reduce leakage in standby, and isolate faults downstream. Key differentiating features of the TPS22919-Q1 include controlled output slew rate for inrush-current limiting during turn-on, adjustable quick output discharge (QOD) that pulls the output low when the switch is off, and integrated self-protection including short-circuit current limiting. According to TI, the device is qualified for automotive applications under AEC-Q100 device temperature grade 1. The internal N-channel MOSFET pass element gives a low, well-controlled on-resistance of 90 mOhm, which limits voltage drop: at 1 A the drop is roughly 90 mV, dissipating about 90 mW. The controlled slew rate soft-starts capacitive loads, avoiding the large inrush spikes that can sag upstream rails or trip protection circuits. The QOD function is adjustable via an external resistor, letting designers trade discharge speed against pull-down current. Typical applications include automotive camera and sensor modules, infotainment power distribution, peripheral-rail switching in ADAS domains, and portable or industrial designs needing fault-isolated power gating. The wide 1.6 V to 5.5 V input range covers 1.8 V, 3.3 V, and 5 V rails in one footprint. For design, account for the Rds(on) power loss at high current, ensure the ON-pin logic threshold matches the controlling GPIO, and size the QOD resistor for the required discharge time. Do not rely on the switch to regulate voltage - it only gates the rail. This page synthesizes distributor availability data, drop-in alternatives, and practical design guidance not found in the manufacturer datasheet.
TPS2291L02BYCJR - 2A 22mΩ Load Switch | TI
The Texas Instruments TPS2291L02BYCJR is a compact 5.5V, 2A load switch with 22 mΩ on-resistance and 90 nA quiescent current, housed in a 4-ball DSBGA (0.62 mm x 0.62 mm) wafer-scale package. A load switch is a power management IC that places a power MOSFET between a supply rail and its load, allowing a controller to gate power on and off electronically. In the system power hierarchy, load switches sit between the voltage regulator (or battery) and downstream loads such as sensors, radios, and processors, providing controlled power sequencing, inrush limiting, and leakage isolation. They are essential in battery-powered designs where every microamp of standby drain matters. Key features of the TPS2291L02 include an input voltage range of 1.05V to 5.5V, a maximum continuous current of 2A, and an extremely low 90 nA quiescent current. A quick output discharge (QOD) function actively pulls the output low when the switch is disabled, preventing floating rails from back-powering the load. The controlled turn-on time limits inrush current during startup, and the enable (EN) pin interfaces directly with low-voltage control signals from MCUs and processors. Internally, the device uses an N-channel MOSFET as the pass element, driven by an internal charge pump, which enables low RON across the full input range while keeping the die tiny enough for a 0.62 mm square DSBGA footprint. This makes it suitable for space-constrained portable designs. Typical applications include smartphone and tablet peripheral rail switching, battery-powered IoT sensor power gating, camera module power control, and power sequencing in multi-rail processor systems where module power-up order must be enforced. When designing with this part, remember that DSBGA packages require careful PCB layout: lands must be non-solder-mask-defined per TI recommendation, and inspection is best done with X-ray. Also budget for the switch's RON-related drop at 2A continuous load. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS22954-Q1 - 5.7V 5A 14mΩ Load Switch | TI | Automotive
The Texas Instruments TPS22954-Q1 is a single-channel N-channel high-side load switch rated for 5.7 V input, 5 A continuous current, with an ultra-low 14 mΩ on-resistance, housed in a 10-pin WSON (DQC, 3x2 mm) package. This automotive-grade power-distribution switch integrates controlled turn-on, adjustable rise time, voltage monitoring, and output discharge functions in a compact footprint. A load switch is a power management IC placed in series with a voltage rail to connect or disconnect power to downstream loads under logic control. Within the power management hierarchy, load switches sit between the supply and the load, complementing voltage regulators by adding switching, inrush control, sequencing, and fault protection. They are essential wherever rails must be turned on softly, sequenced in order, or monitored for faults. Key features of the TPS22954-Q1 include the 14 mΩ typical on-resistance that minimizes voltage drop and conduction loss at full 5 A load, a wide 0.7 V to 5.7 V operating range covering 1.0 V, 1.8 V, 3.3 V, and 5 V rails, an adjustable rise time via an external capacitor for controlled inrush, and quick output discharge for defined rail states. The device is characterized for operation over the -40°C to +105°C ambient range required by automotive applications. Technically, the switch uses a low-RON N-channel MOSFET pass element with an integrated charge pump to drive the gate above the rail, delivering very low insertion loss. Controlled turn-on suppresses inrush current peaks that would otherwise cause supply droop, while voltage monitoring and output diagnostics give the system controller visibility into rail health - valuable for functional-safety oriented designs. Both DQC (0.5 mm pitch) and DSQ (0.4 mm pitch) package versions are supported on the TPS22954EVM evaluation module. Typical applications include automotive ADAS and infotainment power rails, electronic control unit (ECU) subsystem sequencing, power switching for cameras, displays, and communication modules, and general high-current rail switching in industrial systems where a Q100-class device is preferred. A key design consideration is thermal management: at 5 A and 14 mΩ, conduction losses are roughly 0.35 W (estimated from I²R), so a solid ground-plane pour under the die attach pad is important. Also account for the adjustable rise-time capacitor sizing against your inrush budget. This page synthesizes distributor pricing, same-package drop-in alternatives, and practical design guidance not found in the manufacturer datasheet.
TPS22970YZPR - 3.6V 4A 4.7mΩ Load Switch | Texas Instruments
The Texas Instruments TPS22970YZPR is a small, space-saving N-channel high-side load switch rated for 3.6 V operation, 4 A pulsed switch current, and 4.7 mΩ typical on-resistance, packaged in an 8-ball DSBGA (WCSP, YZP) chip-scale package. It integrates an N-channel MOSFET biased by a charge pump, an on/off logic input, and an optional output discharge resistor for controlled turn-off behavior. What is a load switch? A load switch is a power-management device that uses an internal MOSFET to connect or disconnect a downstream circuit (a "rail" or "load") from an upstream power source. Unlike a DC-DC converter, a load switch does not regulate voltage — its role is gating, inrush control, sequencing, isolation, and reverse-current blocking. Load switches belong to the broader category of power distribution switches (PDswitches), which sit hierarchically below discrete MOSFETs but above simple pass-gate FETs because they integrate control, protection, and timing into a single IC. Key features of the TPS22970YZPR include a wide input voltage range of 0.65 V to 3.6 V (compatible with 1-cell Li-ion rails as well as 1.0 V/1.2 V/1.8 V/2.5 V/3.3 V logic rails), continuous current up to 2 A and pulsed current up to 4 A, 4.7 mΩ RON that minimizes conduction loss, controlled turn-on to limit inrush current, and an internal discharge path that pulls the output to ground when the switch is disabled. The device operates over -40°C to +105°C and ships on a 0.9 mm pitch WCSP footprint measuring roughly 1.50 mm × 1.50 mm. Architecturally, the integrated charge pump generates a VGS boost above VIN so the NMOS can fully enhance even at very low input voltages — a non-trivial achievement because a standard NMOS would otherwise struggle to pass sub-1 V rails cleanly. This makes the part especially attractive for ultra-low-voltage core rails in mobile and battery-powered designs. Typical applications include power gating in smartphones, wearables, SSDs and solid-state storage modules, portable medical devices, and IoT sensor nodes where the load switch isolates a sleeping sub-system from a battery to extend standby life. The output discharge resistor is particularly useful in multi-rail systems where residual charge on a disabled rail could otherwise leak through the body diode of a downstream load. When designing with this device, pay close attention to the PCB footprint: the WCSP-8 (DSBGA) package requires NSMD pads with precise solder-mask openings and reflow profile matched to JEDEC J-STD-020. Avoid placing vias directly under the balls and follow TI's WCSP layout recommendations. This page synthesizes distributor pricing from DigiKey and Mouser, drop-in alternatives from TI's load-switch family, and practical design notes not found in the manufacturer datasheet.
TPS22990DMLR - 10A, 5.5V, 3.9mOhm Load Switch | TI
The Texas Instruments TPS22990DMLR is a single-channel N-channel high-side load switch delivering up to 10 A continuous current with a 3.9 mOhm typical on-resistance, operating over an input voltage range of 0.6 V to 5.5 V in a 10-pin WSON (3x2 mm) package (DML, WSON-10 with exposed pad). A load switch is a power distribution IC that sits between a supply rail and its load, using an internal MOSFET pass element to connect, disconnect, and protect the rail. In the power-management hierarchy, load switches are siblings of hot-swap controllers and eFuses within power distribution ICs, and they are commonly paired with DC-DC converters and LDO regulators to sequence and gate individual rails. Key features of the TPS22990 include the ultra-low 3.9 mOhm on-resistance, which minimizes voltage drop and conduction power loss at high load currents; controlled and adjustable turn-on slew rate via an external CT capacitor, which suppresses inrush current and bus voltage sag; and an integrated power-good (PG) indicator for rail monitoring and sequencing. An optional quick output discharge (QOD) function actively pulls the output low when the switch is off. Architecturally, the device integrates an N-channel MOSFET pass element with gate-drive circuitry powered from a VBIAS supply, allowing the switch to operate down to 0.6 V input while supporting modern low-voltage rails. The adjustable rise time lets designers trade startup time against inrush current for a given output capacitance. Typical applications include server and notebook point-of-load power gating, SSD and storage rail switching, multi-rail power sequencing in SoC and FPGA systems, and battery-powered equipment where low voltage drop is critical. A key design consideration: at 10 A, even 3.9 mOhm dissipates roughly 0.39 W, so PCB copper area under the exposed pad is essential for thermal management. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS22990NDMLR - 10A, 5.5V, 3.9mOhm Load Switch | TI
The Texas Instruments TPS22990NDMLR is a 5.5 V, 10 A, 3.9 mOhm single-channel N-channel high-side load switch housed in a 10-pin WSON (3x2 mm) package, featuring an adjustable controlled turn-on, integrated power-good (PG) indicator, and quick output discharge (QOD) function. A load switch is a power distribution switch, a type of power management IC that sits between a supply rail and its load to gate power on and off, control inrush current, and isolate faults. In the system hierarchy, it belongs to the family of high-side switches used in power trees alongside hot-swap controllers, e-fuses, and DC-DC converters, enabling fine-grained power sequencing and rail management. Key differentiating features include an ultra-low 3.9 mOhm on-resistance, which minimizes both the voltage drop across the switch and conduction power loss at the full 10 A continuous current, and a wide 0.6 V to 5.5 V input voltage range that spans modern sub-1 V core rails up to standard 5 V rails. The adjustable slew rate (soft-start), set via an external capacitor, suppresses inrush current during turn-on, while the integrated PG output simplifies power-rail sequencing and monitoring without external supervisory circuitry. The N-channel MOSFET architecture avoids the body-diode conduction and rds(on) penalties of older P-channel designs at high current. Internal control logic drives the gate with a controlled ramp defined by the CT pin capacitor, and the QOD option actively discharges the output when the switch is disabled, preventing floating rails in multi-rail systems. ESD protection on the pins adds robustness during assembly and handling. Typical applications include SSD and storage power distribution, FPGA and processor core-rail sequencing, networking cards, battery-powered portable systems, and server backplane point-of-load switching, all of which benefit from low-loss high-current switching with controlled turn-on. Design consideration: at 10 A, conduction loss is approximately I2 x R, so PCB copper pour on the IN and OUT pins is essential for thermal management. This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS22990NDMLT - 10A, 5.5V, 3.9mOhm Load Switch | TI
The Texas Instruments TPS22990NDMLT is a 5.5 V, 10 A single-channel load switch with 3.9 mOhm on-resistance, housed in a 10-pin WSON (3x2 mm) package. It integrates an N-channel MOSFET high-side switch operating from a 0.6 V to 5.5 V input range, with a controlled and adjustable turn-on and an integrated power-good (PG) indicator. A load switch is a power management IC that sits between a supply rail and its load, using an internal MOSFET to connect or disconnect power under logic control. Load switches belong to the broader family of power distribution switches and hot-swap devices within power management ICs. They protect downstream circuitry during power sequencing, limit inrush current, and isolate faulty or idle loads to save energy in multi-rail systems. Key differentiating features of the TPS22990NDMLT include the very low 3.9 mOhm on-resistance, which minimizes conduction losses at the full 10 A continuous current (approximately 0.39 W of estimated I2R dissipation), the wide 0.6 V to 5.5 V input range that supports low-voltage core rails as well as standard 5 V and 3.3 V rails, adjustable rise time for inrush-current control, and soft-start behavior. An integrated power-good output simplifies rail monitoring and power-sequencing handshakes, and the TPS22990N variant adds optional output discharge functionality to actively pull the output low when the switch is off. Technically, the device uses an N-channel MOSFET as the pass element and requires a bias supply above the input rail to fully enhance the switch, keeping the on-resistance low even at sub-volt input levels. The controlled turn-on circuitry charges the output gradually, with the slew rate settable by an external capacitor, allowing designers to trade startup time against inrush current and voltage droop on the upstream rail. Typical applications include SSD and storage power distribution, server and datacenter point-of-load switching, FPGA and ASIC core-rail power sequencing, battery-powered portable systems, and industrial 5 V rail isolation. When designing with this part, provide a solid ground plane and adequate copper area for the VOUT pins, since 10 A of continuous current demands low-impedance thermal and electrical paths. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS22991IBNRAAR - 5.5V 2.7A Load Switch UQFN-HR | Texas Instruments
The Texas Instruments TPS22991IBNRAAR is a 5.5V, 2.7A, 28 mOhm single-channel load switch with controlled slew rate, housed in a 4-pin UQFN-HR (RAA) package measuring just 0.85 mm x 0.75 mm with 0.4 mm pitch. The device integrates an N-channel MOSFET that operates over a 1.0V to 5.5V input voltage range and is characterized for operation from -55C to +125C, covering extreme-temperature and wide-temperature industrial designs. A load switch is a type of power management IC (power distribution switch) that gates a voltage rail on and off under logic control, protecting downstream circuitry from inrush current and enabling power sequencing. Within the power-management hierarchy, the TPS22991I family sits between a voltage regulator and a simple discrete MOSFET switch: it provides controlled turn-on without regulation of the rail voltage itself. Key features include a low on-resistance of 28 mOhm, which minimizes voltage drop and conduction loss at multi-ampere loads, and a controlled slew rate that limits inrush current when charging large bulk capacitance. The ON/OFF control input interfaces directly with low-voltage GPIO signals, allowing the switch to be driven by microcontrollers and processors operating well below the main rail voltage. Low shutdown leakage makes the device suitable for battery-powered designs where off-state quiescent draw must be minimized. Technically, the integrated N-channel pass element is driven by an internal charge-pump-free gate-drive scheme referenced to the input pin, with slew-rate control implemented through a controlled gate-drive ramp. This gives a predictable, monotonic output voltage ramp that avoids the sharp turn-on transients typical of uncontrolled discrete MOSFET switching. Typical applications include power-rail gating for battery-powered portable electronics, module power sequencing in processors and FPGAs, and load switching in industrial sensors operating over extended temperature ranges. The tiny 0.85 mm x 0.75 mm footprint suits densely packed wearables and IoT modules. Design consideration: verify the device pinout carefully. Unlike most single-channel load switches that use an IN-OUT-GND-EN ordering, the TPS22991I pinout is documented as special in TI's E2E forum, so confirm pin assignments against the manufacturer datasheet before layout. This page synthesizes distributor availability, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS22991IBRAAR - 2.7A, 28mOhm Load Switch | Texas Instruments
The Texas Instruments TPS22991IBRAAR is a small, low-ON-resistance single-channel load switch with controlled slew rate, integrating an N-channel MOSFET rated for 2.7 A continuous current with 28 mOhm typical ON-resistance, operating from a 1.0 V to 5.5 V input supply in a 4-pin UQFN-HR (0.85 mm x 0.75 mm) package. The IBR suffix denotes the industrial temperature variant (J version, -40C to +125C). A load switch is a type of power distribution switch - a power management IC that sits between a supply rail and its load, turning power on and off under logic control. Within the power management hierarchy, load switches bridge the gap between simple discrete MOSFET switching circuits and full hot-swap controllers, providing controlled turn-on, low leakage, and small footprint in a single device. Key features include the 28 mOhm N-channel MOSFET pass element, a controlled slew rate that limits inrush current during turn-on, and very low shutdown leakage current, which is critical for battery-powered designs that must conserve charge in the off state. The ON/OFF control input interfaces directly with low-voltage GPIO or processor control signals, eliminating the need for level-shifting circuitry in many designs. Technically, the device integrates the MOSFET switch and edge-rate control in the tiny 0.85 mm x 0.75 mm UQFN-HR package, making it one of the smallest 2.7 A-class load switches available. The controlled turn-on behavior suppresses voltage droop on the upstream rail when charging large downstream capacitance, protecting sensitive loads from supply dips. Typical applications include power rail sequencing and power muxing in portable and battery-powered electronics, peripheral power gating in smartphones, tablets, and wearables, and module power control in IoT and industrial sensor nodes. When designing with this part, verify the pinout against the datasheet before layout: the TPS22991 pin assignment differs from the conventional IN-OUT-GND-EN arrangement common to most single-channel load switches, a point highlighted in TI's E2E support forum. Also confirm that the upstream rail can tolerate the inrush into downstream bulk capacitance despite the slew-rate control. This page synthesizes distributor availability, drop-in alternative analysis, pricing tiers, and practical design notes not found in the manufacturer datasheet.
TPS22991ICNRAAR - 2.7A, 28mΩ Load Switch | TI
The Texas Instruments TPS22991ICNRAAR is a single-channel N-channel load switch rated 2.7A continuous current with a 28 mΩ on-resistance, operating from a 1.0V to 5.5V input range over a -55°C to +125°C junction temperature range, housed in a 4-pin UQFN-HR package measuring just 0.85 mm x 0.75 mm with 0.4 mm pitch. A load switch is a power management IC that sits between a power rail and its load, acting as an electronically controlled switch. In the system hierarchy, a load switch is a type of power distribution switch, itself a subcategory of power MOSFET driver / power management IC. Load switches allow processors, PMICs, or logic circuits to connect and disconnect sub-system power rails, control power-up sequencing, and limit inrush current during capacitor charging at turn-on. Key features of the TPS22991I family include the extremely small plastic 4-pin UQFN package, controlled slew rate during turn-on that limits inrush current, low shutdown leakage current that preserves battery life in portable designs, and an on/off input (EN) capable of interfacing directly with low-voltage GPIO control signals. The switch element is an N-channel MOSFET that supports a maximum continuous current of 2.7A in this variant. Technically, the device integrates the N-channel pass MOSFET, its charge-pump-style gate drive, and slew-rate control circuitry into the tiny 0.85 mm x 0.75 mm footprint. The controlled rise time avoids the voltage droop and ringing that occur when an uncontrolled switch charges large downstream capacitance. The low shutdown leakage specification is particularly valuable in always-on and battery-backed designs where even microamps matter. Typical applications include power-rail gating in smartphones, tablets and wearables, peripheral power switching in industrial sensors and IoT modules, battery disconnect functions in portable instruments, and power sequencing for processors, RF front ends and displays. The -55°C to +125°C range supports aerospace and extreme-environment industrial designs. A key design consideration: the 4-pin UQFN-HR pinout is not the generic IN-OUT-GND-EN arrangement used by most small load switches, so designers must verify the specific pin assignment in the manufacturer datasheet before drop-in substitution; TI's E2E forum has documented this special pinout. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS22992 - 5.5V 6A 8.7mΩ Load Switch | Texas Instruments
The Texas Instruments TPS22992 is a single-channel load switch with an integrated 8.7 mΩ power MOSFET designed to maximize power density in applications up to 5.5 V input and 6 A continuous output current, housed in an 8-pin WQFN-HR (1.5 mm x 1.25 mm) package. A load switch is a power management IC that sits between a power rail and its load, using an internal MOSFET pass element and control logic to connect or disconnect the load on demand. Load switches occupy the middle of the power management IC hierarchy, below full DC-DC converters and above discrete MOSFET solutions, providing controlled power-up, inrush limiting, rail sequencing, and fault isolation that a bare MOSFET cannot deliver without significant external circuitry. Key features of the TPS22992 include the ultra-low 8.7 mΩ on-resistance, which limits conduction losses to roughly 78 mW at a full 6 A load, an input voltage range up to 5.5 V, and a configurable rise time that gives designers flexibility for power sequencing. The adjustable rise time also minimizes inrush current when switching high-capacitance loads such as large ceramic capacitor banks or downstream SoC core rails. Technically, the TPS22992 uses an N-channel high-side power MOSFET driven by an internal charge-pump gate driver, which allows the switch to achieve extremely low Ron without the voltage-drop penalty of a P-channel device. The TPS22992x family consists of two members: the TPS22992 and the TPS22992S, which differ in their output discharge behavior, letting designers choose whether the output rail floats or is actively pulled low when the switch is disabled. Typical applications include powering processor cores and I/O rails in servers and SSDs, peripheral port power control in industrial systems, and general 5V-rail power distribution where a compact 6 A switch replaces discrete MOSFET-plus-driver solutions. When designing with the TPS22992, account for thermal rise at sustained high load: at 6 A, I2R losses through the 8.7 mΩ switch demand a solid ground-plane copper pour under the WQFN-HR thermal pad to keep junction temperature within limits. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS22995RZFR - 3.8A, 18mΩ Load Switch | TI | Power Distribution
The Texas Instruments TPS22995RZFR is a single-channel N-channel load switch with a maximum continuous current of 3.8 A, a typical on-resistance of 18 mΩ, and an input operating voltage range of 0.4 V to 5.5 V, housed in a 6-pin WQFN-HR (RZF) package measuring 1.25 mm x 0.85 mm. A load switch is a power management IC that sits between a power rail and its load, using an internal MOSFET pass element to connect or disconnect the rail under logic control. Within the power management hierarchy (load switch -> power distribution switch -> power management IC), load switches handle controlled power sequencing, inrush limiting, and rail isolation in systems where a simple regulator cannot provide on/off control. The TPS22995 belongs to this load switch category and is optimized for low on-resistance and configurable startup behavior. Key features include the 0.4 V to 5.5 V VIN range, a VBIAS supply range of 1.5 V to 5.5 V that keeps the internal gate drive strong even when VIN is very low, and adjustable slew rate control through an external capacitor on the CT pin. The adjustable rise time minimizes inrush current when charging large bulk capacitance, and the device provides overtemperature protection. An active-high ON pin enables straightforward GPIO interfacing. Technically, the TPS22995 uses an N-channel MOSFET pass element with an internal charge-pump-derived gate drive supplied by VBIAS. This architecture delivers 18 mΩ typical on-resistance while maintaining low dropout at 3.8 A loads, and the RC-programmable CT pin allows designers to trade startup time against inrush current precisely. Typical applications include powering core rails of processors and FPGAs, peripheral rail switches in smartphones and tablets, SSD and storage subsystem power sequencing, and battery-powered portable devices where controlled power-up extends battery life. A key design consideration: choose the CT capacitor value so the 10%-90% rise time is long enough to limit inrush below the 3.8 A maximum continuous current when switching large capacitive loads. Oversizing the capacitor unnecessarily slows rail bring-up during power sequencing. This page synthesizes distributor pricing, drop-in alternative data, and practical design notes not found in the manufacturer datasheet alone.
TPS22995RZGR - 3.8A, 5.5V Load Switch 18mΩ | TI
The Texas Instruments TPS22995RZGR is a single-channel N-channel high-side load switch with a maximum continuous current of 3.8 A, a typical on-resistance of 18 mΩ, and an input operating voltage range of 0.4 V to 5.5 V, housed in a 6-pin WQFN-HR (RZG) package measuring just 1.5 mm x 0.75 mm. A load switch is a type of power distribution switch, which itself sits within the broader power management IC hierarchy. Load switches use an integrated MOSFET pass element controlled by a logic input to connect or disconnect a power rail from its load, enabling power sequencing, rail gating, and inrush-current control in multi-rail systems. The TPS22995 implements this function with a low-resistance N-channel MOSFET that reduces dropout voltage for low-voltage, high-current rails. Key features include the 0.4 V to 5.5 V VIN range, a separate bias supply (VBIAS) operating from 1.5 V to 5.5 V that fully enhances the N-channel MOSFET even at very low input voltages, and adjustable output slew-rate control through an external capacitor on the CT pin. The adjustable rise time enables precise power-on sequencing and limits inrush current during startup, protecting upstream regulators and connectors. Technically, the device achieves its 18 mΩ typical on-resistance by driving the N-channel pass transistor gate above the input rail using the bias supply. This architecture yields very low voltage drop at multi-ampere loads, minimizing power loss (I²R) and thermal stress. Typical on-resistance keeps dissipation low: at 3.8 A the conduction loss is only about 0.26 W (Estimated: I²R = 3.8² x 0.018). Typical applications include power rail gating in battery-powered portable electronics, SSD and storage peripherals, micro-IoT hardware with limited PCB real estate, and industrial point-of-load distribution where a small, low-loss switch is required. When designing with this device, always provide the VBIAS supply (1.5 V to 5.5 V) with local decoupling, and size the CT capacitor to set the rise time appropriate for the load capacitance to control inrush current. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS22996H-Q1 - 5.5V 4A Dual Load Switch | TI Automotive
The Texas Instruments TPS22996H-Q1 is a dual-channel load switch with controlled turn-on, containing two N-channel MOSFETs rated for 0.6 V to 5.5 V input voltage, 13 mOhm typical on-resistance, and 4 A maximum continuous current per channel, housed in a 2.1 mm x 1.2 mm 8-pin DYC (SOT-583) package. A load switch is a power management IC that sits between a supply rail and its load, using an internal MOSFET to connect or disconnect power under the control of a logic signal. Within the power-management hierarchy (load switch -> power distribution switch -> power management IC -> semiconductor), load switches add controlled slew rates, fault protection, and rail sequencing that a bare MOSFET cannot provide, making them essential building blocks in multi-rail electronic systems. Key features include the 13 mOhm typical RON, which minimizes voltage drop and conduction loss at the full 4 A per channel load, independently controlled ON1 and ON2 GPIO-compatible inputs that let a microcontroller sequence each rail separately, and controlled turn-on that limits inrush current when charging large downstream capacitance. The device is AEC-Q100 qualified for automotive use and characterized over -40 C to +125 C. Technically, the TPS22996H-Q1 integrates the power MOSFET, driver, and control logic in one die, reducing BOM count versus discrete solutions. Per TI documentation, the pins are humidity-robust and able to function with a 100 kOhm short from any pin to GND or power, improving reliability in harsh automotive environments. Typical applications include automotive infotainment and cluster power distribution, ADAS module periphery-rail switching, telecom line-card power sequencing, and industrial PLC I/O rail control, where low RON and dual independent channels save board space. Design consideration: at 4 A per channel, PCB copper area under the small DYC package determines thermal rise; verify junction temperature with your actual duty cycle and both-channel loading. This page synthesizes distributor pricing context, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
TPS22997QRYZRQ1 - 10A, 5.5V Load Switch | Texas Instruments
The Texas Instruments TPS22997QRYZRQ1 is an AEC-Q100 qualified single-channel automotive load switch delivering up to 10A continuous current over an input voltage range of 0.1V to 5.5V, with a bias supply of 1.5V to 5.5V. It integrates an N-channel MOSFET with a typical on-resistance of only 4 mΩ in a compact 10-pin WQFN-HR (RYZ) package measuring just 1.5 mm x 2 mm. A load switch is a power management IC that gates a power rail on and off using an integrated MOSFET controlled by a logic-level enable pin. In the power management hierarchy, load switches sit between the power source (a DC-DC converter or LDO) and the load, providing controlled power-up sequencing, inrush limiting, rail isolation, and fault protection that raw converters do not offer. Key features include adjustable slew-rate control to minimize inrush current during turn-on, an adjustable quick output discharge (QOD) pin that actively pulls the output low when disabled, and a power-good output for rail monitoring and sequencing. The ON pin can interface directly with low-voltage GPIO signals. Thermal shutdown and low quiescent power consumption round out the feature set. Technically, the 4 mΩ RON translates to only 40 mV of drop at 10A and just 0.4W of conduction loss, eliminating the need for a heatsink. The configurable rise time allows designers to trade startup time against inrush current to protect upstream regulators and downstream capacitors. Typical applications include automotive ADAS processor and FPGA power sequencing, infotainment rail gating, sensor module power control, and battery-connected load management in 5V and sub-5V systems. The Q1 qualification supports all AEC-Q100 automotive ambient temperature grades. Design tip: use the CT pin capacitor to set slew rate so that inrush into large downstream bulk capacitance stays within the upstream supply current limit, and verify bias voltage is present before asserting ON.
TPS22997RYZR - 5.5V 10A 4mOhm Load Switch | Texas Instruments
The Texas Instruments TPS22997RYZR is a single-channel load switch with an integrated N-channel MOSFET, operating over an input voltage range of 0.1 V to 5.5 V and supporting a maximum continuous current of 10 A, with a typical on-resistance of 4 mOhm. It is housed in a compact 10-WQFN-HR (1.5x2 mm) package designed for space-constrained, high-current power distribution. A load switch is a semiconductor device that connects or disconnects a power supply rail from a load, functioning as an electronic switch. It typically integrates a pass MOSFET, gate-drive control logic, and protection features such as thermal shutdown and inrush management. Load switches sit within the power management IC hierarchy alongside hot-swap controllers and eFuses, and are essential for power gating, rail sequencing, and protection in systems from smartphones to industrial equipment. Key features include adjustable slew rate control to minimize inrush current during turn-on, adjustable quick output discharge (QOD) for rapid discharge of output capacitance, and a power good (PG) signal for rail monitoring. The enable pin (ON) interfaces directly with low-voltage GPIO signals, and the device offers thermal shutdown protection and low power consumption. The bias voltage range of 1.5 V to 5.5 V ensures compatibility with standard logic levels in mixed-voltage systems. Technically, the TPS22997 integrates a very low on-resistance N-channel MOSFET, achieving 4 mOhm typical RON, which minimizes voltage drop and conduction loss - critical at 10 A loads where even milliohms matter (4 mOhm x 10 A = 40 mV drop and 0.4 W dissipation). The configurable rise time allows designers to tailor inrush current to upstream supply capability and load capacitance, reducing supply droop and board stress. Typical applications include power distribution in SSDs, smartphones, tablets, and other portable and battery-powered devices, as well as hot-swap and load-switching functions in industrial systems. The low RON and high current capability suit high-current low-voltage rails, while the tiny 1.5x2 mm footprint saves board space. When designing with the TPS22997, provide adequate PCB copper area for thermal dissipation at full 10 A load, place decoupling capacitors close to VIN and VBIAS, and set the slew rate to balance inrush current against turn-on delay for the specific load capacitance.
TPS23521 - -10V to -80V Hot Swap Controller | Texas Instruments
The Texas Instruments TPS23521 is a high-performance hot swap controller for -10V to -80V telecom power systems, integrating dual current limit and dual gate drive in a 16-pin TSSOP (PWT/PWR) package. It enables safe board insertion and removal from live -48V backplanes, serving network routers, switches, and other high-power telecom equipment. A hot swap controller is a power management IC that safely connects and disconnects a load from a live power bus, limiting inrush current and preventing connector arcing and system glitches. It works with an external pass MOSFET, current sensing, and gate control, and belongs to the broader power management IC hierarchy alongside e-fuses and hot swap controllers. Key features include a 200V absolute maximum rating for survivability during lightning surge tests per IEC61000-4-5, dual current limit with dual gate drive for independent control of two MOSFETs, and a soft start capacitor disconnect function that enables soft start at power-up while improving transient response in normal operation. The device operates over -40C to +85C and is RoHS compliant. The TPS23521 uses a proprietary architecture providing precise current sensing and fast response to overcurrent faults. Its high-voltage capability and robust design make it well suited for harsh telecom environments with -48V battery plants, where input transients from lightning surge and hot swapping are common design challenges. Typical applications include -48V hot swap in telecom rectifiers, network routers, Ethernet switches, and base station power distribution. With appropriate external MOSFETs, the dual gate drive supports high-current designs up to several hundred amps. Design tip: choose the soft start capacitor to limit inrush current to safe MOSFET SOA levels, and provide low-inductance, thermally adequate PCB paths for the external pass devices. Pricing varies by package suffix and quantity; refer to authorized distributors for current stock and pricing as of 2026-08-30.
TPS2370D - IEEE 802.3af PoE Power Interface Switch | TI
Texas Instruments TPS2370D is an IEEE 802.3af Power-over-Ethernet power interface switch for powered devices, presented in an 8-pin SOIC package. It integrates the input protection and power-signaling functions needed to connect a PoE powered device to compliant Ethernet infrastructure. The device is intended for 12.5 W-class PoE systems and helps separate the low-power Ethernet data path from the higher-voltage power path before downstream DC/DC conversion. A PoE power interface switch is the bridge between an Ethernet cable and a powered-device power supply. Ethernet carries data and power on the same cable, so the powered device must identify the available power source, control the connection, and protect the interface before accepting power. The TPS2370D is designed around IEEE 802.3af-compatible PoE powered-device behavior and is suitable for IP phones, wireless access points, surveillance equipment, and other network peripherals. The manufacturer product page identifies TPS2370 as an IEEE 802.3af power interface switch for PoE powered devices. Distributor listings identify TPS2370D as an 8-SOIC device. The verified data does not provide a complete electrical table, so ratings such as input voltage range, current limit, channel timing, protection thresholds, and temperature limits must be taken directly from the manufacturer datasheet before final design release. Those unprovided values are intentionally not inferred here. The TPS2370D belongs to the PoE interface-controller category, which sits between Ethernet connectivity and downstream power management. It is not a general-purpose voltage regulator or a DC/DC converter. A typical design uses the device at the Ethernet connector or PoE input, then passes the selected power to a DC/DC converter that creates the low-voltage rails required by the powered device. For a new PoE design, verify connector pinout, cable polarity protection, isolation requirements, thermal performance, and the IEEE 802.3af power-class limits against the current TI documentation. The D suffix denotes the verified 8-SOIC ordering variant, while package-specific land patterns and exposed-pad details must be confirmed from the package drawing rather than inferred from generic SOIC drawings. This product page consolidates the verified manufacturer identification, package information, distributor data, and cross-reference findings. It deliberately distinguishes confirmed facts from parameters requiring the datasheet, which helps engineers evaluate sourcing without treating unverified electrical claims as design data.
TPS2370DR - IEEE 802.3af PoE Power Interface Switch | Texas Instruments
The Texas Instruments TPS2370DR is an IEEE 802.3af power interface switch for Power over Ethernet powered devices, supplied in an 8-pin SOIC package. The verified listing identifies its role as a PoE power-interface switch, while the available data does not specify its operating voltage, current, protection thresholds, temperature range, or exact electrical limits. A PoE power interface switch is the component that connects a powered device to the power delivered through an Ethernet cable. It sits in the power path after cable-side network isolation and helps a powered device receive or reject power according to the Ethernet PoE system. In this product family, the TPS2370 is specifically identified as an IEEE 802.3af power interface switch for PoE powered devices. The principal verified feature is IEEE 802.3af compatibility. This standard is associated with 10/100/1000BASE-T Ethernet applications and defines the framework for supplying power over standard Ethernet cabling. The TPS2370DR therefore targets networking equipment that needs a dedicated PoE interface rather than a general-purpose voltage regulator or conventional power switch. The TPS2370DR uses Texas Instruments’ DR package designation, identified in the supplied results as an 8-SOIC or SOP8 package. Surface-mount construction supports compact PCB layouts, while the eight-pin package leaves the device easy to inspect and replace during manufacturing. The verified distributor information also classifies it as a specialized interface IC and power-supply support circuit. Typical application areas include PoE-powered network cameras, VoIP phones, wireless access points, Ethernet switches, and other powered devices connected through Ethernet infrastructure. The exact power budget, current handling, protection behavior, and thermal performance must be confirmed from the manufacturer datasheet before final circuit design. This page preserves the verified product identity and distinguishes it from functionally similar, but not necessarily pin-compatible, alternatives.
TPS2370PW - IEEE 802.3af PoE PD Interface, 8-TSSOP | Texas Instruments
The Texas Instruments TPS2370PW is an IEEE 802.3af-compliant Power Interface Switch for Power-over-Ethernet (PoE) Powered Devices (PDs), integrating detection, classification, inrush current limiting, and a 0.3-ohm internal pass FET into a single 8-pin TSSOP (PW) package. It acts as the interface between the Power Sourcing Equipment (PSE) and the powered device, performing all functions required by the IEEE 802.3af standard. The device supports input voltages up to 67 V from the Ethernet cable and includes a 100 V rated internal switch. A PoE PD controller is a specialized power management integrated circuit that handles the front-end handshake between a PoE-enabled switch (PSE) and the device receiving power (PD). It detects a valid 25 kohm signature resistor, classifies the PD into one of five power classes (0-4) under the IEEE 802.3af spec, controls inrush current with a soft-start mechanism, and finally applies power through an integrated low-RDS(on) MOSFET. The TPS2370 occupies the power management IC hierarchy between simple hot-swap controllers and full PoE+ (802.3at) Type 2 controllers, representing the original-generation 802.3af building block. Key features include a 0.3-ohm internal pass MOSFET, programmable inrush current limiting, integrated detection signature circuitry, automatic classification signature generation, and an open-drain power-good output indicator. The 8-pin TSSOP package enables compact front-end designs for IP phones, wireless access points, and security cameras where PCB real estate is at a premium. The device operates from the 48 V nominal PoE rail but tolerates transients consistent with cable discharge events. The architecture uses a precision bandgap reference and comparators to implement the IEEE 802.3af detection signature (25 kohm equivalent resistance), and a current-mode control loop for inrush limiting. Once classification completes, the internal 100 V N-channel MOSFET is fully enhanced, minimizing DC losses. Logic-level interfaces provide ground-referred status and enable signals for downstream DC-DC converters. Typical applications include VoIP phones, wireless access points (Wi-Fi APs), IP security cameras, RFID readers, and any low-power 802.3af-compliant PD that derives its primary supply from a PoE line. Industrial sensors and building automation endpoints also benefit from single-cable power-and-data deployment enabled by this controller. When designing with this part, follow IEEE 802.3af detection and classification timing budgets closely; bypass the device with a TVS diode for cable discharge protection, and select the input bulk capacitor and inrush timing components per the datasheet's typical application circuit to avoid re-triggering detection during power-up. This page synthesizes distributor availability, drop-in alternatives to other 8-pin TSSOP PoE PD controllers, and practical layout considerations that go beyond the datasheet's typical application drawings.