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Analog Devices Inc. LTM4628IY#PBF
- Part No.:
- LTM4628IY#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Converters
- Package:
- 144-BBGA Module
- Datasheet:
-
LTM4628IY#PBF.pdf
- Description:
- DC DC CNVRTR 0.6-5.5V 0.6-5.5V
- Quantity:
- Payment:
- Shipping:
Inventory:4,836
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Product details
Overview
LTM4628IY#PBF from Analog Devices is a dual-output µModule® DC/DC regulator delivering 8A per channel (or 16A in 2-phase single-output mode), operating from 4.5V to 26.5V input and supporting 0.6V–5.5V programmable outputs with ±1.5% total DC error. It integrates controller, MOSFETs, inductor, and compensation in a thermally enhanced BGA package and is used in telecom power supplies requiring tight rail sequencing and fast transient response.
For engineers reviewing the LTM4628IY#PBF datasheet, LTM4628IY#PBF pinout, LTM4628IY#PBF application, or LTM4628IY#PBF equivalent, key selection criteria include dual 8A output capability, differential remote sensing support, multiphase synchronization via CLKOUT/PHASMD/MODE_PLLIN, onboard temperature diode, and Burst Mode® operation for light-load efficiency.
Technical Context
The LTM4628IY#PBF implements two independent current-mode controlled buck regulators with internal 0.6V reference, 90ns minimum on-time, and programmable switching frequency from 400kHz to 750kHz via fSET or external SYNC. Each channel features dedicated COMP, VFB, TRACK, and PGOOD pins enabling precise voltage tracking, soft-start, and fault reporting.
It supports parallel operation across multiple units using MODE_PLLIN for phase synchronization, PHASMD for CLKOUT phase offset (60°/90°/120°), and shared COMP/VFB nodes for current sharing. Remote sensing is implemented via DIFFP/DIFFN/DIFFOUT with 1V/V gain, 3mV offset, and 90dB PSRR - validated for 0.6V–3.3V outputs only.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 26.5V - supports wide industrial and telecom supply rails without pre-regulation. |
| Output Current (per channel) | 8A continuous - enables high-density dual-rail power delivery with minimal external components. |
| Output Voltage Range | 0.6V to 5.5V - covers core logic, I/O, and analog supply requirements with single-resistor programming. |
| Total DC Output Error | ±1.5% - includes line/load/temp drift; ensures stable regulation under full operating conditions. |
| Switching Frequency Range | 400kHz to 750kHz - adjustable via fSET pin or external SYNC; balances EMI, efficiency, and transient response. |
| Thermal Package | 15mm × 15mm × 4.92mm BGA - RoHS-compliant SAC305 finish; θJCbottom = 2.75°C/W enables high-power dissipation. |
| Remote Sense Support | Differential amplifier (DIFFP/DIFFN/DIFFOUT) - accurate load-point regulation for 0.6V–3.3V outputs only. |
Pinout & Package
Package: 144-ball BGA, 15mm × 15mm × 4.92mm, RoHS-compliant SAC305 finish, MSL Level 3, –40°C to +125°C operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT1 (A1–A5, B1–B5, C1–C4) | Power output terminal (Channel 1) | High-current output node; requires direct decoupling to GND pins for low-impedance return path. |
| VOUT2 (A8–A12, B8–B12, C9–C12) | Power output terminal (Channel 2) | Independent 8A output; supports coincident tracking or independent sequencing via TRACK1/2. |
| VIN (M2–M11, L2–L11, J2–J4, J9–J11, K2–K4, K9–K11) | Main power input | 10 dedicated input pads accept 4.5V–26.5V; requires ≥22µF ceramic input capacitance per channel. |
| GND (multiple locations) | Power ground return | 48-pin distributed ground network minimizes IR drop and improves thermal conduction to PCB. |
| fSET (C6) | Frequency programming input | Sources 10µA; resistor to GND sets frequency (400–750kHz); also accepts DC voltage drive. |
| MODE_PLLIN (F4) | Mode control & sync input | Selects Burst Mode® (float), pulse-skipping (INTVCC), forced CCM (GND), or external clock sync. |
| TRACK1 / TRACK2 (E5 / D8) | Soft-start & voltage tracking input | 1.3µA pull-up; capacitor to GND sets ramp rate; voltage divider enables precise rail sequencing. |
| DIFFP / DIFFN (E8 / E9) | Differential remote sense inputs | Enable load-point regulation for 0.6V–3.3V outputs only; must tie DIFFOUT to VOUTS1 or VOUTS2. |
| TEMP (J6) | Onboard temperature diode anode | Monitors junction temperature via VBE change; requires external bias circuit per ADI AN-1180. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 8A or single 16A 2-phase operation | Enables flexible system-level power architecture: independent dual rails or high-current single rail with interleaved ripple cancellation. |
| Differential remote sense amplifier | Compensates for PCB IR drop on 0.6V–3.3V outputs; 3mV offset and 90dB PSRR ensure accuracy under varying load conditions. |
| Programmable frequency & phase synchronization | CLKOUT/PHASMD/MODE_PLLIN allow up to 12-phase cascading with precise phase offsets (60°/90°/120°) for multi-module systems. |
| Burst Mode® and pulse-skipping operation | Extends battery life in portable equipment: <15mA quiescent current at light loads while maintaining regulation. |
| Onboard temperature diode | Provides real-time thermal monitoring without external sensors; supports overtemperature shutdown via system controller. |
| Integrated current-mode control | Delivers <20µs settling time for 50% load steps; eliminates need for external loop compensation across all output capacitors. |
Applications
| Telecom Baseband Power | Industrial FPGA Core Supply |
|---|---|
|
Use Scenario: Powering dual-core baseband processors in 5G small cells with strict 1.2V/1.5V rail sequencing and <50mV load transient deviation. IC Role / Device Role / Timing Role: Dual-output µModule regulator providing independently tracked 1.2V@8A and 1.5V@8A rails with synchronized soft-start and PGOOD assertion. Use Value: Eliminates discrete controller + FET + inductor design; achieves <20µs transient recovery and ±1.5% regulation across –40°C to +125°C. |
Use Scenario: Supplying Xilinx Kintex UltraScale+ FPGA core (VCCINT) and auxiliary (VCCAUX) rails in factory automation controllers. IC Role / Device Role / Timing Role: Single-package solution delivering 1.2V@8A and 1.8V@8A with differential remote sensing to compensate for 150mΩ PCB trace resistance. Use Value: Maintains 1.2V ±12mV at load point under 0–8A step; reduces board area by 65% vs. discrete DC/DC solutions. |
| ATCA Carrier Card | High-Density Storage Controller |
|
Use Scenario: Generating 3.3V@8A and 1.2V@8A for AdvancedTCA carrier cards with hot-swap compliance and rail margining. IC Role / Device Role / Timing Role: Dual-channel regulator with independent RUN1/RUN2 control, PGOOD monitoring, and EXTVCC efficiency boost for 12V input. Use Value: Enables hot-swap sequencing via TRACK pin control; EXTVCC reduces driver losses by 15% at 12V input. |
Use Scenario: Powering NVMe SSD controller and DRAM buffers in enterprise storage enclosures with thermal derating constraints. IC Role / Device Role / Timing Role: Thermally optimized BGA module with θJCbottom = 2.75°C/W, onboard TEMP diode, and 125°C max junction rating. Use Value: Sustains 8A/channel continuous output at 70°C ambient with no airflow; simplifies thermal design vs. LGA alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output µModule regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM4650AIV#PBF | Single 50A output; 4-phase interleaved; 4.5V–16V input; no dual independent outputs. | Replaces LTM4628IY#PBF only when single high-current rail is needed; lacks independent tracking/sequencing. | Select when >16A single-rail output required; not suitable for dual-rail systems requiring independent control. |
| LTM4644IY#PBF | Quad 4A outputs; same 15mm × 15mm BGA; 4.5V–26.5V input; ±1.5% error; no DIFF amplifier. | Supports four independent rails but omits differential remote sensing and CLKOUT phase control. | Choose for multi-rail systems needing >2 outputs; avoid when load-point sensing or precise phase sync is mandatory. |
Compared with LTM4628IY#PBF, LTM4650AIV#PBF trades dual-rail flexibility for higher single-rail current and lower component count, while LTM4644IY#PBF expands rail count at the expense of remote sensing and multiphase coordination capability.
Availability
LTM4628IY#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial FPGA power, and high-density storage applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant BGA packaging.
Supply support for LTM4628IY#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and power management markets.
The LTM4628IY#PBF belongs to the µModule® regulator product line, designed to replace complex discrete DC/DC designs with fully integrated, verified, and thermally optimized power subsystems for space-constrained, high-reliability applications.
FAQ
What is the maximum output current per channel for the LTM4628IY#PBF?
The LTM4628IY#PBF delivers 8A continuous current per channel at 12V input and 1.5V output, with derating based on input voltage, output voltage, and ambient temperature. The device supports dual 8A outputs or reconfiguration as a single 16A 2-phase output. Thermal performance is validated in the 15mm × 15mm × 4.92mm BGA package with θJCbottom = 2.75°C/W.
Does the LTM4628IY#PBF support remote voltage sensing?
Yes, the LTM4628IY#PBF includes a differential remote sense amplifier (DIFFP/DIFFN/DIFFOUT) supporting accurate load-point regulation for outputs between 0.6V and 3.3V. The amplifier provides 1V/V gain, 3mV input offset, and 90dB PSRR. DIFFOUT must be connected to either VOUTS1 or VOUTS2; floating these pins invalidates feedback and risks overvoltage.
How is switching frequency programmed on the LTM4628IY#PBF?
Switching frequency on the LTM4628IY#PBF is set via the fSET pin, which sources a precise 10µA current. A resistor from fSET to GND programs the frequency from 400kHz to 750kHz. Alternatively, a DC voltage (0V–INTVCC) applied to fSET achieves the same result. External synchronization is supported via the MODE_PLLIN pin within the same frequency range.
What thermal metrics define the LTM4628IY#PBF's cooling performance?
The LTM4628IY#PBF specifies θJCbottom = 2.75°C/W and θJA = 9.5°C/W–11°C/W depending on PCB layout. Its 15mm × 15mm BGA footprint includes 48 GND balls for low-thermal-resistance conduction to inner copper layers. Maximum junction temperature is 125°C, with internal thermal shutdown activated above this threshold.
Can multiple LTM4628IY#PBF units be synchronized for multiphase operation?
Yes, the LTM4628IY#PBF supports multiphase synchronization using MODE_PLLIN (for external clock injection), CLKOUT (phase-adjustable clock output), and PHASMD (selects 60°/90°/120° phase offset). Up to 12 phases can be cascaded. For current sharing, tie COMP1/COMP2 and VFB1/VFB2 together across modules, and use matched RFB resistors.
LTM4628IY#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 144-BBGA Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 26.5V
- Voltage - Output 1:
- 0.6 ~ 5.5V
- Voltage - Output 2:
- 0.6 ~ 5.5V
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 8A, 8A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- OCP, OVP, UVLO
- Operating Temperature:
- -40°C ~ 125°C
- Efficiency:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 144-BGA (15x15)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
LTM4628IY#PBF FAQ
1.How can I place an order for LTM4628IY#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM4628IY#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTM4628IY#PBF reliable?
The price and inventory of LTM4628IY#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM4628IY#PBF is usually 5 days.
3.What payment methods are accepted for LTM4628IY#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM4628IY#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM4628IY#PBF?
LTM4628IY#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM4628IY#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTM4628IY#PBF?
For technical support, including LTM4628IY#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM4628IY#PBF requirements.
6.How does Aetrix verify that LTM4628IY#PBF is sourced from the original manufacturer or authorized distributors?
All LTM4628IY#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTM4628IY#PBF meets industry standards.
7.What is the process for return or replacement of LTM4628IY#PBF?
All LTM4628IY#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM4628IY#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTM4628IY#PBF part is unused and in its original packaging.
Return procedure for LTM4628IY#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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