LTM4620IY

LTM4620IY is a high-performance, quad-channel, multiphase synchronous buck DC-DC regulator from Analog Devices (Linear Technology family). It provides four integrated switching regulators to generate several low-voltage rails from a common higher input, enabling compact, high-current VRMs.
Designed for CPUs, GPUs, FPGAs, and telecom processors, it offers high efficiency and fast transient response in a single, compact package (the IY suffix indicates the package variant).
Key features (typical): independent channels with a shared input, adjustable output voltages via external feedback resistors, remote sensing, current sharing capability, and protection (overcurrent, overtemperature, undervoltage, short-circuit).
Used in multi-rail power architectures requiring tight regulation and space efficiency. For exact electrical specs (input range, per-channel current, output voltage ranges, sequencing, thermal limits), consult the LTM4620IY datasheet.

LTM4620IY features (concise):
- High-current µModule buck regulator: up to ~60 A total output with integrated inductor, MOSFETs, drivers, and compensation.
- Wide input range: 4 V to 36 V (suitable for automotive/industrial), with robust UVLO protection.
- Adjustable multi-output outputs: VOUTs programmable with external feedback; supports tracking/sequencing.
- PMBus-compatible digital interface for programming, monitoring (VOUT, IOUT, VIN, temp), and fault reporting.
- Remote sense, voltage tracking, and sequencing for hot-swapping and board-level regulation.
- Protections: cycle-by-cycle current limit, overcurrent/short-circuit protection, overvoltage protection, thermal shutdown.
- Soft-start and programmable current limit; fault latch options.
- High efficiency (typical 95%+ at moderate loads); switching frequency ~1 MHz.
- Operating temperature range: -40°C to 125°C (Tj), suitable for harsh environments.
- Minimal external components required beyond input/output capacitors; compact, predefined µModule package for easy layout and cooling.

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The LTM4620IY is manufactured by Analog Devices, Inc. (originally a Linear Technology product line; Linear was acquired by Analog Devices in 2017). Analog Devices is a U.S.-based multinational semiconductor company that designs and manufactures analog and mixed-signal integrated circuits and power-management modules (including µModule DC/DC regulators).

Applications: high-density, multi-rail VRMs and PMBus-controlled DC-DC converters for point-of-load power in servers, data centers, networking/telecom equipment, industrial automation, and embedded systems. Ideal for CPU/GPU/SoC core rails, memory, and auxiliary rails needing tight regulation and fast transient response.