LTM4620IY

The LTM4620IY is a dual-channel, high‑efficiency µModule DC‑DC buck regulator from Analog Devices (Linear Technology lineage). It integrates two synchronous buck regulators, their power FETs, control circuitry, an inductor, and most passives into a single compact module, simplifying design and PCB layout. The IY suffix denotes a Pb‑free, RoHS‑compliant package variant.
Key features:
- Wide input range; two independently adjustable outputs with remote sensing, tracking/soft‑start, and sequencing.
- Built‑in protections: overcurrent, over‑temperature, and fault reporting.
- External resistor dividers set output voltages; minimizes BOM and layout complexity.
- High efficiency and fast transient response; suitable for point‑of‑load rails for CPUs, GPUs, FPGAs, ASICs, memory, and telecom gear.
- Very small footprint enables close placement to loads, reducing inductive losses.
For exact specs (input range, current per rail, and package dimensions), refer to the LTM4620IY datasheet and reference design.

Here are the typical features of the LTM4620IY (µModule multiphase DC-DC regulator):
- Integrated µModule regulator with inductor and passive components
- PMBus digital interface for voltage, enable, sequencing, readbacks, and fault reporting
- Wide input range with multiple adjustable outputs
- Multiphase operation with automatic current sharing
- Remote sensing for accurate output regulation
- Output sequencing and pre-bias/soft-start control
- High efficiency and fast transient response
- Overcurrent/short-circuit protection with hiccup behavior
- Overvoltage/undervoltage protection
- Over-temperature/thermal shutdown protection
- Fault/status reporting and diagnostic capabilities
- Compact package suitable for high-density VRM applications (e.g., FPGAs/CPUs)

Pin count: 28 pins (LGA package).
Function: Dual synchronous buck regulator (two channels) with integrated MOSFETs and controller, used to convert a higher input voltage to two regulated outputs (multiphase capable).

Manufacturer: Analog Devices, Inc. (product line originally from Linear Technology — LTM µModule series).
What kind of company: Analog Devices is a global semiconductor firm that designs and manufactures high‑performance analog, mixed‑signal and power-management integrated circuits (including µModule DC/DC regulators), used in industrial, automotive, communications, and instrumentation applications.

Applications of LTM4620IY (a compact multi-rail DC-DC µModule):
- High-density VRMs for CPUs/GPUs/FPGA/ASICs
- Point-of-load rails in servers, storage, and networking gear
- Telecom and datacom line cards and network switches
- Industrial, automotive, aerospace/defense electronics needing rugged, compact multi-rail supplies
- Embedded systems and development boards requiring compact multi-rail regulation
- Any system needing multiple regulated rails from a single, efficient module with fast transient response

The LTM4620IY is delivered in a μModule (LGA — land grid array) surface-mount package designed for PCB mounting.