LTM4623EY#PBF

The LTM4623EY#PBF is a triple-output µModule DC-DC buck regulator from Analog Devices (formerly Linear Technology). It combines three synchronous step-down regulators, their control circuitry, power MOSFETs, an inductor, and essential passives into a single compact module, simplifying board power design.
Key points
- Three independently regulated rails in one 15×15 mm package for CPUs, FPGAs, memory, etc.
- Wide input range with adjustable/output rails set by external resistors; features sequencing options.
- High efficiency with built-in protections (overcurrent, overvoltage, thermal shutdown) and remote sense capability.
- Thermal, current-sharing/limit behavior suitable for multi-rail power trees.
- Packaging: EY denotes the variant/package; PBF indicates Pb-free (lead-free) packaging.
Usage
- Drop-in multi-rail power solution to replace discrete regulators; saves board space and reduces EMI/complexity.
Note: Check the datasheet for exact input voltage range, output voltage options, sequencing behavior, and current capabilities.

Direct equivalents from other vendors do not exist. LTM4623EY#PBF is a six-output PMBus µModule DC-DC converter from Analog Devices. The closest cross-references are other Analog Devices µModule regulators with PMBus and multi-output capability. For an exact cross-reference, use ADI’s cross-reference tool or provide your required rail outputs, currents, and input range; I’ll propose suitable candidates.

Key features of LTM4623EY#PBF (µModule PMBus multi-output buck regulator):
- 3-phase, integrated buck regulator in a single µModule with on-chip MOSFETs and drivers.
- PMBus interface for voltage programming, monitoring, margining, and fault reporting.
- Independent programmable output voltages per phase with remote sensing capability.
- Phase interleaving and current sharing for high total current capability.
- Soft-start, enable/disable control, and programmable sequencing/margining.
- Comprehensive protection: overcurrent/short-circuit protection with current limit, overvoltage, undervoltage, and thermal shutdown.
- Real-time monitoring: Vout, Iout, Vin, die temperature; alarm/status accessible via PMBus.
- Fault handling with latching/clear features and status reporting.
- Pb-free, RoHS-compliant packaging; compact footprint suitable for dense power rails.
- Wide applicability for CPU cores, GPUs, FPGAs and other multi-rail systems requiring programmable, monitored rails.

- Pin count: 28 pins (LGA package, 8×8 mm class)
- Function: PMBus-enabled multi-output buck DC-DC regulator (µModule) with integrated inductor, providing multiple regulated outputs from a common input.

- Manufacturer: Analog Devices, Inc. (ADI).
- What kind of company: A multinational semiconductor company that designs, manufactures, and markets analog, mixed-signal, and digital signal processing integrated circuits and related components.

- High-current point-of-load DC–DC for CPUs, GPUs, FPGAs, and ASICs
- Server and data-center VRMs
- Networking and telecom equipment power rails
- Storage and memory power delivery
- Industrial and embedded systems requiring compact, efficient power conversion
Note: LTM4623EY#PBF is a compact µModule regulator suitable for high-current, high-efficiency VRM applications.

Package type: Pb-free μModule in an LGA (land-grid array) package.