LTM4643EY#PBF Analog Devices Integrated Circuit (BGA) In Stock
Analog Devices LTM4643EY#PBF is a 3 A step-down µModule DC/DC regulator accepting 4 V to 20 V input in a BGA-77 package. It delivers adjustable output from 0.6 V to 3.3 V at 1.2 MHz switching frequency. The fully integrated power module simplifies high-density point-of-load designs for communications and industrial systems.
- Manufacturer
- Analog Devices
- Package
- BGA
- Pin Count
- 77
- Lifecycle
- ACTIVE
- Datasheet
- LTM4643EY#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $27.9000(MOQ 4)
- Temp Range
- ?°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LTM4643EY#PBF?
- Complete 3 A step-down µModule with integrated inductor, FETs, and passives in BGA-77
- Wide 4 V to 20 V input range covering 5 V, 12 V, and 15 V bus rails
- Adjustable output from 0.6 V to 3.3 V with current-mode PWM control at 1.2 MHz
- Compact BGA package enables ultra-high-density point-of-load layouts with minimal external components
- Supports output voltage tracking and sequencing for multi-rail power systems
What is LTM4643EY#PBF used for?
The LTM4643EY#PBF suits high-density point-of-load power conversion in FPGA boards, networking equipment, and industrial computing where space is limited and 12 V bus efficiency is critical. Its integrated magnetics and switching components reduce design complexity for power engineers delivering 3 A to FPGAs, DSPs, and memory arrays. The 0.6 V to 3.3 V adjustable output range makes it versatile across multiple processor core and I/O voltage rails within a single compact footprint.
What are the specifications of LTM4643EY#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1559 |
| YTEOL | 10 |
| Additional Feature | ALSO OPERATES IN ADJUSTABLE MODE FROM 0.6 TO 3.3V |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 20V |
| Input Voltage-Min | 4V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PBGA-B77 |
| JESD-609 Code | e1 |
| Number of Functions | 1 |
| Output Current-Max | 3A |
| Output Voltage-Max | 3.3V |
| Output Voltage-Min | 0.6V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | GRID ARRAY |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 1200kHz |
| Technology | HYBRID |
| Temperature Grade | OTHER |
| Terminal Finish | Tin/Silver/Copper (Sn/Ag/Cu) |
| Terminal Form | BALL |
| Terminal Pitch | 1.27mm |
| Terminal Position | BOTTOM |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | BGA |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Where can I find the LTM4643EY#PBF datasheet?
LTM4643EY#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LTM4643EY#PBF?
Compatible alternatives and drop-in replacements for LTM4643EY#PBF:
Switching Regulator, Current-mode, 3A, 1200kHz Switching Freq-Max, Hybrid, PBGA77
Frequently Asked Questions
What input voltage range does the LTM4643EY#PBF support and what switching frequency does it use?
The LTM4643EY#PBF accepts input voltages from 4 V to 20 V, covering standard 5 V, 12 V, and 15 V bus rails. It switches at 1.2 MHz, which keeps output ripple low and allows small external filter capacitors, reducing total solution footprint on dense PCBs.
How is the output voltage of the LTM4643EY#PBF set, and what is the achievable output range?
Output voltage is programmed by a single external resistor connected to the VOUT pin, covering a continuous range from 0.6 V to 3.3 V. This adjustment range spans processor core voltages, DDR memory rails, and 3.3 V I/O supplies, allowing one µModule variant to serve multiple rails within a system design.
For a compact FPGA power tree on a 12 V bus, why choose the LTM4643EY#PBF over a discrete buck converter?
The LTM4643EY#PBF integrates the inductor, MOSFETs, gate drivers, and compensation network inside a BGA-77 package measuring approximately 9 mm × 9 mm, saving at least 200 mm² versus a comparable discrete 3 A buck solution. This integration shortens design time, eliminates magnetics selection, and reduces EMI risk from parasitic loop inductance that plagues discrete layouts.
Does the LTM4643EY#PBF support output voltage tracking for multi-rail power sequencing?
Yes, the device includes a TRACK pin that allows the output to ramp in proportion to an external reference or another supply, enabling precise power sequencing across 2 or more rails. This feature is critical for FPGA and DSP designs where core voltage must rise before I/O voltage to prevent latch-up or undefined logic states during power-up.
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Why Buy from FindMyChip
About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 4+ | $66.2857 | $265.14 |
| 6+ | $59.4286 | $356.57 |
| 10+ | $38.9880 | $389.88 |
| 19+ | $36.9800 | $702.62 |
| 170+ | $35.4000 | $6018.00 |
| 1000+ | $27.9000 | $27900.00 |
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