Hot Swap et distribution de puissance
Produits (7)
ISL61851BCBZ-T - Dual USB Hot-Swap Controller, 2.5-5V, 8-SOIC | Renesas
The Renesas (formerly Intersil) ISL61851BCBZ-T is a dual-channel USB hot-swap power supply controller with integrated MOSFETs, rated for a 2.5 V to 5 V input range and housed in an 8-pin SOIC package (suffix "-T" indicates tape-and-reel packaging). It provides fully independent overcurrent (OC) fault protection for two USB ports and supports the commercial 0 °C to +70 °C temperature range. A hot-swap controller is an integrated circuit that safely powers up a load (such as a USB port or plug-in card) while limiting inrush current, detecting faults, and isolating the downstream bus from a faulty or shorted load. Within the broader taxonomy, a hot-swap controller is a member of the power-management IC family, which also includes LDOs, DC-DC converters, and supervisors. Hot-swap controllers are especially critical in USB hubs, hot-plug PCIe cards, and any system where external cabling or removable loads can present transient or sustained faults. Key features of the ISL61851BCBZ-T include two independent OC-protected switches, low on-resistance internal N-channel MOSFETs, automatic fault recovery with retry, an enable input that is active-HIGH on the "B" variant, and per-channel fault flags. The part is part of the ISL6185xxC family of sixteen functional variants covering enable polarity, fault-response behavior, and temperature range. This product family provides a USB-port power switch with the protection features required by USB 2.0/3.0 host and hub implementations. Technically, each ISL61851 channel integrates a current-sensing MOSFET structure that compares load current against an internal reference. When the threshold is exceeded the controller latches off (or auto-retries, depending on the variant) and asserts a FAULT# output. The enable (EN) pin is active-high in the ISL61851BC variant. Operating from a 2.5 V to 5 V supply, the device is fully compatible with USB VBUS rails and supports both USB 2.0 high-power (500 mA) and USB 3.0 (900 mA) port profiles. Typical applications include USB hubs (standalone and motherboard-integrated), motherboard add-in cards with USB ports, docking stations, embedded systems providing host USB power, and any 5 V rail that must survive short-circuit events. The dual-channel integration halves the board area compared to two discrete switches. When designing with this part, place input and output bulk capacitors close to the device pins to control inrush, choose the upstream supply with adequate headroom, and tie FLG# pins to the system controller so it can announce port faults to the host. The drop-in variants in the same SOIC-8 footprint share the pinout and most electrical parameters, simplifying second-source qualification.
LM5069MM-2/NOPB - 80V Hot Swap Controller w/ Power Limit | TI
The Texas Instruments LM5069MM-2/NOPB is a positive high-voltage hot-swap / inrush current controller with power limiting, operating across a 9V to 80V input range and packaged in a 10-pin VSSOP (DGS). The -2 suffix designates auto-restart fault behavior after a fault detection, while the -1 sibling latches off instead, both sharing the same die and footprint. What is a hot-swap controller? A hot-swap controller is a power-management IC that allows a circuit board to be inserted into a live backplane without drawing inrush currents large enough to damage connectors, blow fuses, or collapse the upstream rail. It drives an external N-channel MOSFET in the high-side path and combines programmable inrush current limiting, power limiting, undervoltage/overvoltage lockout, and a fault timer. Hot-swap controllers belong to the wider power-management hierarchy: hot-swap controller -> hot-swap & power distribution -> power management IC -> semiconductor. Key features include programmable current limit set by an external sense resistor, a 0.7-ms internal fault timer that distinguishes inrush from sustained fault, independent OV/UV thresholds with hysteresis, a power-good indicator, and a board-insertion delay. The DGS VSSOP package occupies roughly the same board area as a 10-pin MSOP while providing enhanced thermal performance for the dissipation levels encountered in -48V telecom and 24V industrial rails. The device uses a transconductance control loop with a dv/dt circuit on GATE, charging the MOSFET gate with a programmable current source to ensure monotonic rail ramp. Power limiting is implemented by measuring the voltage across the sense resistor multiplied by VIN, giving a true input-power limit rather than a simple current foldback, which protects the upstream supply during capacitive or short-circuit events. The LM5069-2 auto-restart behavior retries every 220 ms (typical) after a fault, ideal for transient overload recovery. Typical applications include -48V telecom plug-in cards, 24V/48V industrial automation modules, blade servers and ATCA front-end boards, battery exchange modules in UPS systems, and PoE midspan power insertion. The wide 80V input range also tolerates load-dump transients on 24V automotive and heavy-industrial buses. A design consideration worth highlighting: the LM5069MM-2/NOPB differs from the LM5069MM-1 by auto-restart rather than latch-off after faults. Selection should reflect whether the system requires operator intervention (latch) or unattended recovery (auto-restart). PCB layout should keep the sense-resistor trace short and Kelvin-connected to the CS pin to avoid ground bounce from corrupting the current measurement. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone, including a head-to-head comparison with the LM5069MM-1 and TPS2490DGS in the same VSSOP-10 footprint.
STEF512PUR - Dual eFuse 5V/12V 3A Hot-Swap | STMicroelectronics
The STMicroelectronics STEF512PUR is an integrated dual electronic fuse (eFuse) that protects downstream circuitry from overcurrent and overvoltage events in applications requiring hot-swap operation and inrush current control. The device embeds two independent high-side load switches — one optimized for 5 V rails and one for 12 V rails — each rated up to 3 A continuous current in a 10-pin QFN (2 mm x 3 mm) package. Each channel integrates a low-RDS(on) power FET that minimizes voltage drop from the main supply to the load during normal operation, plus two analogue control loops that clamp output voltage and limit input current independently. An electronic fuse (eFuse) is a solid-state replacement for a traditional thermal fuse or PTC, offering resettable, programmable protection with fast fault response. It belongs to the broader family of hot-swap controllers and current regulators within power-management ICs (PMICs). The eFuse architecture allows precise user-adjustable startup behavior via external soft-start capacitors and current-limit thresholds via sense resistors, eliminating the need for bulky mechanical fuses in space-constrained designs. Key features include independent fault timers, thermal shutdown, UVLO and OVLO protection per channel, a Fault flag output for system-level diagnostics, and adjustable slew-rate control. Each eFuse channel operates independently, allowing the 5 V and 12 V rails of a system to be protected, sequenced, and monitored separately without external coordination logic. The integrated MOSFETs drastically reduce BOM count compared to discrete hot-swap solutions built from FETs, op-amps, and sense resistors. Typical applications include hot-swap insertion in rack-mounted servers, SSD and HDD power-rail protection, set-top box and consumer-electronics load switches, USB Type-C VBUS current limiting, and industrial 24 V backplane protection when paired with a pre-regulator. The dual-rail architecture is particularly efficient in ATX-style PC subsystems and small-form-factor systems that need both 5 V standby and 12 V main rail protection. A critical design consideration is the choice of soft-start capacitor, which sets the inrush-current profile and the fault-timer timeout. Engineers should also account for the package's thermal resistance — at full 3 A per channel, sufficient copper pour is required to keep junction temperature within the datasheet limits. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
TPS2493PWR - 80V Hot Swap Controller w/ Power Limit | Texas Instruments
The Texas Instruments TPS2493PWR is a positive high-voltage, 9 V to 80 V hot-swap controller with programmable power foldback, analog current monitor, and Auto-Retry fault response, packaged in a 14-pin TSSOP (PW). It drives an external N-channel MOSFET in the high-side path and uses a programmable power-limit loop to keep the FET inside its safe operating area (SOA) during large load steps and overloads. What is a hot-swap controller? A hot-swap controller is a power-management IC that safely inserts a board or sub-system into a live backplane by inrush-limiting and protecting the upstream supply against catastrophic short-circuit faults. Hot-swap controllers sit hierarchically under power management ICs (PMICs), alongside eFuse devices, ORing controllers, and ideal-diode controllers; together they form the system-protection layer between a raw supply rail and the point-of-load regulators that follow it. Key specifications of the TPS2493 include 9 V to 80 V operating range, programmable power-limit foldback, an adjustable current-limit threshold, fault timer with auto-retry, an analog current-monitor output (IMON) proportional to load current, and an internal charge pump capable of driving the gate of a high-side N-channel FET. The device uses an external sense resistor (RSENSE) for current sensing and two resistors to program the power-limit reference, giving the designer full SOA-tailoring flexibility. The wide VIN range makes it well-suited to 12 V, 24 V, 28 V, and 48 V industrial busses, including telecom -48 V feeds after rectification. Architecturally, the TPS2493 employs a constant-power foldback loop that dynamically reduces the allowable current as VDS across the FET rises, ensuring the FET operates within SOA across the full range of load and input conditions. The analog IMON output reflects the sensed current with a transconductance that allows direct interfacing to an ADC or comparator. Fault-handling includes a programmable fault timer and Auto-Retry response (vs. TPS2492 latch-off), allowing the controller to clear transient faults without system intervention. Typical applications include hot-swap insertion in 24 V industrial PLC chassis, 48 V telecom board in-rush protection, RAID and server backplane power switching, 36 V battery-pack protection in e-mobility, and any +12 V/+24 V distributed-power bus that must tolerate load transients on insertion. When designing with the TPS2493, choose RSENSE based on worst-case load current, then verify the FET SOA curve against the programmed power-limit profile across VDS = 0 V to VINmax. Decouple VCC with a 1 µF X7R close to the pin, keep the SENSE traces short, and add a TVS such as SMBJ33A at the input for surge immunity. Use the IMON output for system telemetry and tie FAULT to a host GPIO to log fault events. This page synthesizes distributor pricing, datasheet-cited specifications, drop-in alternatives from the same TI HotSwap family, and practical design notes that go beyond what appears on the TI datasheet cover page.
TPS259533DSGT - 2.7-18V, 4A eFuse w/ OVP | TI | WSON-8
The Texas Instruments TPS259533DSGT is a 2.7 V to 18 V, 34 mΩ, 0.5 A to 4 A integrated eFuse (hot-swap FET) with fast overvoltage protection in an 8-pin WSON (DSG) 2x2 mm package. The '533' suffix denotes the 13.7 V OVP clamp variant, the 'DSG' is the WSON package designator, and the final 'T' indicates Tape-and-Reel packaging. An eFuse (electronic fuse) is a semiconductor power switch that combines a back-to-back MOSFET, current-limit loop, OVP/UVLO comparators, and thermal foldback into a single IC, replacing discrete hot-swap controllers plus an external FET and sense resistor. In the broader taxonomy it is a hot-swap controller > load switch > power management IC > semiconductor. Engineers reach for an eFuse when they need a controlled inrush, fast fault isolation, and a small board footprint on rails such as 5 V, 12 V, or USB-PD VBUS. Key features of the TPS259533DSGT include a 34 mΩ typical RON (full internal FET), a 0.5 A to 4 A adjustable current-limit range set by a single external resistor, a 5 µs OVP response time with a 13.7 V clamp (the highest of the three TPS2595xx OVP options), an operating input voltage of 2.7 V to 18 V (20 V abs max, 18 V for the 'xx5' version), and integrated thermal shutdown. The WSON-8 2x2 mm package offers a low θJA footprint suitable for space-constrained adapter and PoE daughter boards. Internally the device uses TI's NMOS hot-swap architecture with an integrated charge pump to drive the back-to-back FETs. The OVP comparator continuously monitors VIN against the internal 13.7 V reference and latches the FET off in microseconds when exceeded, then auto-retries when VIN returns below the clamp. Current limit is set by an external resistor on the ILIM pin and is further trimmed by the die temperature for a true I²t fault profile, distinguishing it from simple polyfuse or P-channel load switches. Typical applications are 12 V hot-swap rails in industrial PCs, USB-PD source protection, fan and motor driver supply protection, and any 12 V/15 V adapter-fed rail that may see transients above the rated voltage. It is also used as a downstream companion after a buck converter to add resettable fault protection. When designing in this part, route VIN, VOUT, and the thermal pad with wide copper pours; the internal FET dissipates I²S x RON continuously during a fault. Place the ILIM resistor as close to pin 6 as possible to avoid noise pickup on the current-limit loop. This page consolidates distributor pricing, verified drop-in alternatives, and engineering design guidance that go beyond the datasheet's feature list.
TPS26625DRCR - 60V, 880mA eFuse w/ Reverse Polarity Protection | Texas Instruments
The Texas Instruments TPS26625DRCR is a 60-V, 880-mA industrial eFuse with integrated input and output reverse-polarity protection, housed in a 10-pin VSON (DRC) 3 mm x 3 mm package. The device operates across a 4.5-V to 60-V input range, integrates a 478 mΩ N-channel MOSFET, and provides programmable current limiting from 0.025 A to 0.88 A, making it a one-chip solution for hot-swap and inrush-current control on 12-V, 24-V, and 48-V industrial buses. An eFuse (electronic fuse) is a solid-state replacement for a traditional PTC fuse or Schottky OR-ing diode; instead of melting, it uses an internal MOSFET and control loop to limit current, assert FAULT, and either latch off or auto-retry. The TPS26625 specifically belongs to the auto-retry sub-family of TI's TPS2662x line, sitting within the broader hot-swap controller / power-path protection category of power-management ICs. Reverse-polarity protection on both input and output is integrated, removing the need for external blocking diodes or MOSFET bridges and reducing BOM cost, board area, and conduction losses. Key features include 4.5-V to 60-V operating range (one device covers 12-V, 24-V and 48-V rails), 478-mΩ on-resistance, user-programmable undervoltage, overvoltage and current-limit thresholds, dedicated FLT and PG open-drain outputs, and selectable fault-response modes. The TPS26625 implements auto-retry after overcurrent or overtemperature events, while the TPS26624 in the same family latches off - a critical behavioral distinction for service vs. replaceable loads. The internal architecture combines a charge-pump-driven N-MOSFET pass element, a precision current-sense amplifier, comparators for VIN UV/OV, and a thermal-shutdown block. Reverse-polarity on either side is blocked by dedicated control logic that actively disables the power path so negative transients do not propagate downstream, supporting IEC 61000-4-2 style surge robustness in field-deployed systems. Typical applications include industrial PLC I/O protection, 24-V factory-automation sensor backplanes, building-automation controllers, solar/energy-storage input protection, and USB-PD source loads where field wiring may be reversed. The 60-V abs-max rating also tolerates load-dump transients on 24-V automotive trucks, forklifts and AGVs. When designing in this part, prioritize thermal copper area: at 0.88 A continuous into a short circuit, the 478-mΩ FET dissipates up to ~0.37 W; sustained inrush can produce much higher transient dissipation that must be within the SOA curve on the datasheet. Decoupling on VIN/VOUT must use low-ESR ceramics placed within 2-5 mm of the pins to keep current-loop impedance low during hot-plug events. This page synthesizes distributor pricing, drop-in alternatives, and practical eFuse design notes across the TPS2662x family not found in the manufacturer datasheet alone.
TPS26633PWPT - 60V, 6A eFuse w/ Surge Protection | Texas Instruments
The Texas Instruments TPS26633PWPT is a 60-V, 6-A industrial eFuse (electronic fuse) integrated circuit housed in a 20-pin HTSSOP power package with an integrated 31-mΩ MOSFET. It operates from a 4.5-V to 60-V input range, delivers programmable output current limiting between 0.6 A and 6 A, and offers output power limiting plus surge protection, all in a single-chip solution. This combination simplifies hot-swap, inrush control, and field-protected power path designs that previously required multiple discrete components. An eFuse (electronic fuse) is a semiconductor-based protection device that replaces traditional PTC fuses, thermistors, and discrete hot-swap controller plus FET combinations. As a member of the broader hot-swap controller and power-path protection IC category within power management, an eFuse integrates current sensing, MOSFET switching, and fault recovery logic into one package, giving system designers faster response, programmable behavior, and resettable protection that does not require manual replacement after a fault event. Compared with a fuse + TVS + load-switch stack, a single eFuse reduces board area, improves diagnostic capability, and enables I2C telemetry or pin-strapped configuration. Key features of the TPS26633PWPT include a 31-mΩ on-resistance integrated N-channel MOSFET, programmable current limit from 0.6 A to 6 A using an external resistor, output power limiting (constant-power mode), surge protection with adjustable slew rate, integrated thermal shutdown, and fault output indication. The device also offers reverse-current blocking when paired with an external B-FET driver pin, and input under-voltage lockout with programmable thresholds. The TPS26633 architecture uses a charge-pump-driven N-channel MOSFET, a high-side current-sense amplifier, and a state machine that handles inrush, steady-state, and fault conditions. Its constant-power foldback mode allows higher transient currents for capacitive loads while preventing SOA violations at elevated input rail voltages, a behavior that traditional fuses and PTCs cannot emulate. Typical applications include industrial 24-V PLC and sensor power rails, factory automation I/O modules, building automation controllers, telecom secondary-side hot-swap, and battery management systems where a resettable, programmable protection element is preferred over a one-shot fuse. When laying out the PCB, place the eFuse close to the input connector to maximize surge absorption, and provide a thermal copper pour under the PowerPAD exposed pad to keep junction temperature within the 150 °C maximum under sustained fault events.