LTM4705IY#PBF

LTM4705IY#PBF is a Linear Technology/Analog Devices high‑current, multi‑phase buck regulator in a compact package. It’s designed to generate a low‑voltage, high‑current rail from a higher input (common in CPU core, FPGA/GPU, and other compute power rails). The device typically integrates the controller and power MOSFETs in a single module, simplifying design and layout.
Key features (high level):
- Multi‑phase interleaved operation for high current with reduced input ripple
- High efficiency and fast transient response
- Adjustable output voltage via external feedback network
- Remote sense capability and current‑sharing between phases
- Protection features (overcurrent/short‑circuit and overtemperature)
- Minimal external components (input/output caps, feedback resistors)
Package/marking:
- IY = specific package code
- PBF = lead‑free, RoHS compliant
Typical use: power rails for CPUs, GPUs, FPGAs, and other high‑current, low‑voltage loads.
For exact electrical specs, pinout, and application notes, refer to the LTM4705 datasheet corresponding to the IY package.

Here are the typical features of the LTM4705IY#PBF:
- Dual, high-current, 2-phase synchronous buck regulator in a single µModule
- Up to about 50 A per channel (high current VRM)
- Wide input voltage range (suitable for common VRM rails)
- Output voltage adjustable with external feedback (and PMBus control for setpoint)
- PMBus/I2C digital interface for voltage programming, readback, margining, and sequencing
- Remote sense and load-current-sharing capability
- Robust protection: overcurrent, overvoltage, undervoltage, overtemperature with fault protection
- Soft-start, voltage margining, and sequencing for safe power-up
- High efficiency and fast transient response
- Fully integrated control, drivers, and power MOSFETs; external passive components required (inductor, input/output caps)
- Pb-free, RoHS-compliant package (PBF variant)
Note: This is a concise feature overview; consult the product datasheet for exact electrical specs and pinout.

Pin count: 32 pins (QFN package).
Function: LTM4705IY#PBF is a dual-channel, multiphase, synchronous buck DC-DC converter with integrated MOSFETs (high-side/low-side) and PMBus interface. It’s used to generate low-voltage rails from a higher input voltage, supporting multiple regulated outputs and current-sharing between phases.

- Manufacturer: Analog Devices, Inc. (ADI), the successor to Linear Technology.
- What kind of company: A multinational semiconductor company that designs and manufactures analog, mixed-signal, and digital signal processing integrated circuits, with a strong focus on power management and precision analog products.

Applications of the LTM4705IY#PBF (µModule DC-DC regulator) include:
- On-board point-of-load power for CPUs/GPUs/ASICs/FPGA/DSPs in servers, workstations, and data centers
- Memory and chipset rail regulation
- Dual-channel power for complex SoCs and high-performance ICs
- High-density power modules in telecom/networking equipment
- Edge computing, industrial control, robotics, and motor drive systems
- Medical devices requiring compact, efficient power
- Any space-constrained design needing two regulated rails from a single module

Package: 32‑lead LQFP (Plastic Quad Flat Package), RoHS Pb-free (PBF).