LTM4644 µModule Regulator: Selection and Sourcing Guide (2026)
The LTM4644 from Analog Devices is one of the most popular quad-output power modules on the market — and one of the most frequently searched parts in the µModule family. If you are designing a compact multi-rail power tree for an FPGA, processor or telecom board, this guide covers what the LTM4644 does, when to use it, what to compare it against, and how to source it reliably.
What is the LTM4644?
The LTM4644 (order code LTM4644IY#PBF for the lead-free version) is a quad 4A DC/DC µModule (power module) regulator from Analog Devices. It integrates the switching controller, power MOSFETs, inductor, compensation and supporting circuitry into a single low-profile surface-mount package — replacing a discrete multiphase design with one component.
Key specifications
4 independent output channels, 4 A each (up to 16 A total)
Wide input range: 4 V to 14 V
Adjustable output: 0.6 V up to 5.5 V per channel
±1.5% total output accuracy
Current-mode control with fast transient response
Parallelable for higher output current
Optional frequency synchronization and multi-phase operation
Low-profile BGA/LGA package
When to use the LTM4644
FPGA, ASIC and DSP core rails — several low-voltage rails on one board
Telecom and datacenter power — high density, tight regulation
Industrial control and instrumentation
Networking equipment and embedded boards
It is the right choice when you need multiple rails in a small footprint with minimal design effort — the module removes the loop-compensation and layout risk of a discrete solution.
Alternatives to consider
LTM4644 vs LTM4638/LTM4624: fewer channels, smaller/cheaper — pick if 1–2 rails are enough.
LTM4644 vs discrete multiphase: discrete is cheaper at very high volume but needs far more design work and board area.
For higher current per rail, consider the LTM4630/LTM4670 family.
Sourcing the LTM4644 reliably
Because the LTM4644 is widely designed-in, it is sensitive to allocation. Buy from a supplier who holds real-time stock, distinguishes the #PBF (lead-free) suffix correctly, and can offer validated alternatives when the exact variant is short. Homehta Technology supplies the LTM4644IY#PBF and related ADI µModule parts from stock with fast global delivery.
Quick FAQ
Is LTM4644IY#PBF the same as LTM4644IY? Yes in function — #PBF denotes the lead-free/RoHS-compliant version. Always order the #PBF suffix for new designs requiring RoHS.
What is the maximum output current? 4 A per channel, up to 16 A total across four channels (more when paralleled).
Need a quote or a hard-to-find part?
Homehta Technology supplies genuine electronic components — MCUs, power modules, memory and discrete semiconductors — from real-time stock with fast worldwide shipping to the US, Europe and Asia. Send your BOM or part list and get pricing within 24 hours.
Request a quote: WhatsApp / Email / RFQ form (list part number & quantity).
Related parts in stock at Homehta: LTM4644IY#PBF — quad 4A DC/DC µModule regulator, real-time stock, request a quote.
