LTC4266AIUHF-4#PBF

Introduction to LTC4266AIUHF-4#PBF
The LTC4266AIUHF-4#PBF is a quad hot‑swap controller from Analog Devices (Linear Technology). It controls four independent power rails to enable safe hot‑plug insertion/removal and fault protection. The “AIUHF-4#PBF” suffix indicates a four‑channel, Pb‑free, industrial‑temperature package variant.
Key features (high level)
- Four independent channels controlling external N‑channel MOSFETs for high‑voltage/high‑current switching.
- Programmable per‑channel current limit via sense resistor; protections for overcurrent, over/under voltage, reverse polarity, and thermal shutdown.
- Fault reporting with per‑channel status/latched outputs for system monitoring and safe fault handling.
- Suitable for high‑availability designs (telecom, data centers, servers, power distribution) where hot‑swap and current protection are required.
- Requires external components (MOSFETs, sense resistors, capacitors) and proper PCB/layout per the datasheet.
Note: For exact electrical specs, pinout, and layout recommendations, refer to the LTC4266 data sheet for this Pb‑free industrial‑temp variant.

LTC4266AIUHF-4#PBF Features (concise)
- 4-channel PoE PD controller with integrated high-side switches
- IEEE 802.3af/at compliant PD negotiation, detection, and classification
- Independent per-port current limit with protection
- Integrated MOSFET switches, hot-swap/inrush control, and soft-start
- Protections: overcurrent, overvoltage, short-circuit, reverse polarity, thermal
- Wide input range (up to ~57 V) with high efficiency
- Fault/status reporting and monitoring across channels
- Pb-free (PBF) package in AIUHF-4
Note: For exact electrical specs, pinout, and programmable options, refer to the LTC4266 datasheet.

16‑lead QFN package (4x4 mm), Pb‑free (PBF).

- Pin count: 28 pins.
- Function: Quad hot-swap/power-path controller. It provides four independent, current-limited channels to drive external high-side MOSFETs, with protection (OV/UV/shorts), fault/status reporting, and soft-start for multi-channel power-supply or backplane applications.

- Manufacturer: Analog Devices, Inc. (ADI). The LTC4266 is a Linear Technology part, and Linear Technology’s products are now part of Analog Devices.
- What kind of company: A multinational semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits (including power management, data converters, amplifiers, sensors, etc.).

LTC4266AIUHF-4#PBF is a four-channel hot-swap/load-switch controller with current-limit and overvoltage protection. Suitable applications include multi-rail power distribution in telecom and data‑com systems, backplanes and line cards, servers and network equipment, industrial control equipment, and other embedded systems requiring safe hot-plug operation, sequencing, and protection across several supply rails.