LTM4649EY#PBF

LTM4649EY#PBF is a high-density, PMBus-controlled multi-output DC-DC regulator in a Linear Technology/ Analog Devices µModule package. It integrates multiple switching regulators, MOSFETs, inductors, and control circuitry into a single compact module for generating multiple rails with minimal PCB footprint.
Key points:
- Digital control via PMBus for voltage programming, sequencing/track, telemetry, and fault reporting.
- Multiple independently regulated outputs with protection features (overcurrent, overvoltage, overtemperature, reverse polarity protection) and remote sense.
- Suitable for high-density power rails in FPGAs/SoCs, networking gear, data centers, and industrial equipment.
- EY indicates the specific package variant; PBF denotes Pb-free, RoHS-compliant.
Note: For exact specifications (input voltage range, number of outputs, per-rail current, efficiency, and PMBus command set), consult the LTM4649 datasheet and product page.

LTM4649EY#PBF is a complete 4-output µModule regulator with integrated inductor, MOSFETs, controller and passives. Key features:
- Four regulated rails in a single module; outputs adjustable via PMBus/I2C.
- Integrated PMBus/I2C for control, monitoring, margining, sequencing, and fault reporting.
- Wide input voltage range suitable for various bus voltages (industrial/automotive environments).
- High efficiency across loads with fast transient response and low output ripple.
- Remote sense capability for improved regulation at the load.
- Power-up/power-down sequencing and voltage tracking across rails.
- Protections: overcurrent/short-circuit, overvoltage, undervoltage, overtemperature; UVLO and fault shutdown.
- Enable/disable control and programmable fault thresholds.
- No external inductor required (fully integrated); compact solution for board space.
- Pb-free (PBF) packaging and compliant with environmental requirements.
Note: For exact electrical specs (voltage ranges, currents, efficiency curves, PMBus commands), refer to the LTM4649EY data sheet.

Pb-free LGA (leadless) µModule package.

Manufacturer: Analog Devices, Inc. (originally marketed under Linear Technology — LTM series — before Analog Devices acquired Linear Technology in 2017).
What kind of company: Analog Devices is a semiconductor company that designs and manufactures analog, mixed-signal and power-management integrated circuits and complete μModule power products used in industrial, communications, automotive and consumer electronics.

LTM4649EY#PBF is a high‑current, multi‑output µModule regulator suited for:
- VRMs for CPUs, GPUs, FPGAs, and ASICs
- Point‑of‑load regulators for data centers and servers
- Networking/telecom equipment with multiple rails
- Industrial automation and motor‑control power rails
- Automotive ECUs and ADAS power systems
- Space‑constrained embedded/high‑performance computing boards

Direct equivalents do not exist. LTM4649EY#PBF is a unique Analog Devices µModule multiphase PMBus buck regulator. Closest substitutes are other Analog Devices LTM µModule buck regulators with similar current/voltage specs and PMBus support (use ADI’s Cross Reference tool to find exact matches). If a non-µModule option is acceptable, consider external PMBus-compatible buck regulators from TI or other vendors matched to your specs.