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Analog Devices Inc. LTM4601AEV-1#PBF
- Part No.:
- LTM4601AEV-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Converters
- Package:
- 133-BLGA Module
- Datasheet:
-
LTM4601AEV-1#PBF.pdf
- Description:
- DC DC CONVERTER 0.6-5V
- Quantity:
- Payment:
- Shipping:
Inventory:3,946
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Product details
Overview
LTM4601AEV-1#PBF from Analog Devices (formerly Linear Technology) is a 12A µModule step-down DC/DC regulator in 15mm × 15mm × 2.82mm LGA package, integrating controller, MOSFETs, inductor, and support components. It operates from 4.5V–20V input, delivers 0.6V–5V output with ±1.5% total DC error, supports output voltage tracking/margining, and achieves up to 95% efficiency at 5VIN/3.3VOUT. Used in telecom power supplies and server VRMs requiring compact, high-current regulation.
For engineers reviewing the LTM4601AEV-1#PBF datasheet, LTM4601AEV-1#PBF pinout, LTM4601AEV-1#PBF application, or LTM4601AEV-1#PBF equivalent, key selection criteria include its 133-pin LGA package with redundant mounting pads, absence of differential remote sense (vs. LTM4601A), PLL synchronization capability, programmable soft-start via TRACK/SS, and margining control via MARG0/MARG1/MPGM pins.
Technical Context
The LTM4601AEV-1#PBF implements constant-on-time current-mode control with 850kHz nominal switching frequency, enabling ultrafast transient response and stable operation with all-ceramic output capacitors. Its architecture integrates low-RDS(ON) MOSFETs, Schottky diodes, and internal compensation - eliminating external loop compensation components.
Unlike the LTM4601A, the LTM4601AEV-1#PBF omits the differential remote sense amplifier (VOSNS+/VOSNS–/DIFFVOUT pins are NC), simplifying layout for applications where local sensing suffices. It retains full PLL synchronization (PLLIN), output voltage tracking (TRACK/SS), and digital margining (MARG0/MARG1/MPGM) functionality, with VOUT_LCL internally connected to VOUT via 50Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 20V DC - supports wide-range industrial and telecom inputs without pre-regulation. |
| Output Current | 12A continuous, 14A peak - sufficient for single-core CPU or FPGA core rails. |
| Output Voltage Range | 0.6V to 5.0V - programmable via single RSET resistor; enables 1.5V/1.2V/1.8V/3.3V standard rails. |
| Total DC Output Error | ±1.5% - includes line/load/temperature drift; ensures tight regulation without post-fabrication trimming. |
| Switching Frequency | 850kHz typical - balances efficiency, size, and EMI; adjustable upward via fSET resistor. |
| Efficiency | Up to 95% at 5VIN/3.3VOUT - reduces thermal load in dense PCB layouts. |
| Package Dimensions | 15mm × 15mm × 2.82mm LGA - surface-mount, low-profile module mountable on PCB backside. |
Pinout & Package
Package: 133-lead LGA (15mm × 15mm × 2.82mm), RoHS-compliant Au finish, MSL Level 3, –40°C to +85°C operating range. Redundant mounting pads (MTP1–MTP3) enhance solder-joint reliability under thermal cycling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Bank 1) | Power Input | Primary DC input connection; requires local ceramic decoupling to PGND for high-frequency noise suppression. |
| VOUT (Bank 3) | Power Output | Main regulated output node; connects directly to VOUT_LCL internally (50Ω series) in LTM4601AEV-1#PBF. |
| PGND (Bank 2) | Power Ground | Common return for input/output power paths; must be tied to system ground at single point near output capacitor. |
| TRACK/SS | Tracking & Soft-Start Control | Configures master/slave sequencing or soft-start ramp rate via external capacitor/resistor divider. |
| MARG0 / MARG1 | Margining Logic Inputs | 2-bit control for no margin / margin up / margin down states; internal 50kΩ pull-down resistors simplify interface. |
| MPGM | Margining Reference Input | Sets margin magnitude via external resistor to GND; current = 1.18V/RPGM, offset = (current × 10kΩ) relative to 0.6V reference. |
| PLLIN | Phase-Lock Loop Input | Accepts external clock (2V–INTVCC) for frequency synchronization; enables PolyPhase® interleaving with multiple modules. |
| RUN | Enable/Shutdown Control | Logic-level input: >1.9V = ON, <1V = OFF; integrated 5.1V Zener protects against overvoltage. |
| VFB | Feedback Input | Connects to internal 60.4kΩ resistor; output voltage set by RSET from VFB to SGND per VOUT = 0.6V × (1 + 60.4kΩ/RSET). |
| VOUT_LCL | Local Output Sense | Direct connection point for local feedback; ties to VOUT internally (50Ω) - no remote sense amplifier present in LTM4601AEV-1#PBF. |
| PGOOD | Power-Good Indicator | Open-drain output pulled low if VFB deviates >±10% from 0.6V for >25µs; used for system power sequencing. |
| fSET | Frequency Set | Adjusts switching frequency above 850kHz via external resistor to GND; improves ripple performance at low duty cycles. |
| COMP | Compensation Node | Internal error amplifier output; accessible for stability tuning if required (though internal compensation is typically sufficient). |
| SGND | Signal Ground | Reference for analog circuitry; must connect to PGND at output capacitor location to minimize noise coupling. |
| INTVCC / DRVCC | Internal Bias Supply | 5V internal regulator output (INTVCC); DRVCC can be externally biased to 5V to improve high-VIN efficiency by reducing linear regulator loss. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | Complete 12A buck solution - eliminates external MOSFETs, gate drivers, inductor, and most passives. |
| UltraFast™ Transient Response | 35mV peak deviation and 25µs settling time for 50% load steps - maintains regulation during CPU/FPGA burst currents. |
| Output Voltage Margining | Programmable ±% margin via MPGM resistor and MARG0/MARG1 logic - enables production test validation without hardware change. |
| PLL Synchronization | External clock input (PLLIN) enables phase-aligned multi-module operation - reduces input/output ripple and EMI peaks. |
| Redundant Mounting Pads | MTP1–MTP3 pads provide mechanical reinforcement - increases solder-joint strength for extended thermal cycling endurance. |
| Programmable Soft-Start | TRACK/SS pin accepts capacitor for controlled VOUT ramp - prevents inrush current and system reset during power-up. |
Applications
| Telecom Line Card Power | Server Memory Rail |
|---|---|
Use Scenario: Providing 1.2V/12A to DDR4 memory subsystems on high-density line cards with strict space constraints. IC Role / Device Role / Timing Role: Primary non-isolated point-of-load regulator delivering tightly regulated core voltage with fast transient recovery. Use Value: Eliminates need for discrete power stage layout; 15mm × 15mm footprint fits behind edge connectors; ±1.5% accuracy meets JEDEC DDR4 VDDQ tolerance. | Use Scenario: Generating 1.8V/12A for baseband processor I/O banks in 5G wireless infrastructure equipment. IC Role / Device Role / Timing Role: High-current, low-noise supply synchronized via PLLIN to system clock to suppress beat frequencies. Use Value: 95% efficiency at 12VIN/1.8VOUT reduces board-level heat; TRACK/SS enables coordinated power-up with FPGA configuration. |
| Industrial PLC CPU Core | Network Switch ASIC Supply |
Use Scenario: Delivering 0.85V/12A to ARM-based real-time controllers in ruggedized programmable logic controllers. IC Role / Device Role / Timing Role: Compact, thermally robust DC/DC converter mounted on PCB underside to conserve front-side real estate. Use Value: LGA package withstands industrial thermal cycling; MARG0/MARG1 enable field firmware-triggered voltage margining for aging compensation. | Use Scenario: Powering 2.5V/12A SerDes lanes in 10GbE switch fabric ASICs requiring precise voltage tracking across multiple rails. IC Role / Device Role / Timing Role: Master regulator in tracking configuration, with slave converters following its VOUT ramp via TRACK/SS pin. Use Value: Differential tracking eliminates timing skew between supply domains; ±1.5% DC error ensures signal integrity margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current µModule regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM4601AEV#PBF | Includes differential remote sense amplifier (VOSNS+/VOSNS–/DIFFVOUT functional); otherwise identical pinout and electrical specs. | Required when load regulation accuracy <0.25% is needed for ≤3.3V outputs with long PCB traces. | Select LTM4601AEV#PBF only if remote sensing is mandatory; LTM4601AEV-1#PBF reduces BOM count and layout complexity for local-sense designs. |
| LTM4602EV#PBF | 15A rated, 850kHz, same package; adds PMBus interface and telemetry (V/I/T monitoring) via SMBus pins. | Used where digital power management, fault logging, or dynamic voltage scaling is required. | Choose LTM4602EV#PBF when telemetry or programmable margins via I²C are needed; LTM4601AEV-1#PBF offers lower cost and simpler analog control. |
Compared with LTM4601AEV#PBF, the LTM4601AEV-1#PBF removes remote sense circuitry to reduce cost and simplify layout, while retaining identical current rating, efficiency, and margining features. Against LTM4602EV#PBF, it lacks digital interface but provides lower unit price and smaller firmware overhead for analog-only systems.
Availability
LTM4601AEV-1#PBF is available at Aetrix Electronics and suitable for telecom line card power, server memory rail design, and industrial PLC CPU core supply requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTM4601AEV-1#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, communications, and industrial markets.
The LTM4601A family was designed as complete, easy-to-use µModule regulators targeting space-constrained, high-current DC/DC conversion in telecom, computing, and networking infrastructure where layout simplicity and reliability are critical.
FAQ
What is the key functional difference between LTM4601AEV-1#PBF and LTM4601AEV#PBF?
The LTM4601AEV-1#PBF omits the differential remote sense amplifier - pins VOSNS+, VOSNS–, and DIFFVOUT are No Connect (NC) in this variant. This eliminates remote sensing capability but reduces cost and simplifies PCB layout for applications where local regulation at the module output is sufficient. All other electrical specifications, pinout, and features including PLL synchronization, margining, and tracking remain identical between the two parts.
Does LTM4601AEV-1#PBF support output voltage margining, and how is it implemented?
Yes, LTM4601AEV-1#PBF fully supports output voltage margining using the MPGM, MARG0, and MARG1 pins. A resistor from MPGM to ground sets a current (1.18V/RPGM) that generates a millivolt offset relative to the internal 0.6V reference. MARG0 and MARG1 act as logic inputs selecting margin up, margin down, or no margin per a defined truth table. This allows production test teams to validate system robustness at ±3% or ±5% VOUT without modifying hardware.
What is the purpose of the redundant mounting pads (MTP1–MTP3) on LTM4601AEV-1#PBF?
The MTP1, MTP2, and MTP3 pads on LTM4601AEV-1#PBF are electrically unconnected (open-circuit) mechanical reinforcement features. They increase solder joint area and mechanical strength, significantly improving resistance to thermal fatigue and crack propagation during repeated temperature cycling - critical for telecom and industrial applications with extended service life requirements.
Can LTM4601AEV-1#PBF be synchronized to an external clock, and what are the electrical requirements for PLLIN?
Yes, LTM4601AEV-1#PBF supports external clock synchronization via the PLLIN pin. The input requires a square wave with logic-high level between 2V and INTVCC (typically 4.7V–5.3V), minimum pulse width >10ns, and is internally terminated with a 50kΩ resistor to SGND. This enables PolyPhase® operation with multiple modules to reduce input/output ripple and EMI, especially beneficial in high-density power systems.
What external components are mandatory for basic operation of LTM4601AEV-1#PBF?
Only two external components are mandatory: bulk input capacitor (≥20µF ceramic) placed adjacent to VIN/PGND pins, and output capacitor (≥100µF ceramic or polymer) connected between VOUT and PGND. Optional components include RSET for output voltage programming, soft-start capacitor on TRACK/SS, and resistor on MPGM for margining. No external inductor, MOSFETs, or compensation network is required - all are integrated within the LTM4601AEV-1#PBF module.
LTM4601AEV-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Package/Case:
- 133-BLGA Module
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- Non-Isolated PoL Module
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output 1:
- 0.6 ~ 5V
- Voltage - Output 2:
- -
- Voltage - Output 3:
- -
- Voltage - Output 4:
- -
- Current - Output (Max):
- 12A
- Power (Watts):
- -
- Voltage - Isolation:
- -
- Applications:
- ITE (Commercial)
- Features:
- OVP, SCP, UVLO
- Operating Temperature:
- -40°C ~ 85°C
- Efficiency:
- 95%
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 133-LGA (15x15)
- Control Features:
- -
- Approval Agency:
- -
- Standard Number:
- -
LTM4601AEV-1#PBF FAQ
1.How can I place an order for LTM4601AEV-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTM4601AEV-1#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 LTM4601AEV-1#PBF reliable?
The price and inventory of LTM4601AEV-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTM4601AEV-1#PBF is usually 5 days.
3.What payment methods are accepted for LTM4601AEV-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTM4601AEV-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTM4601AEV-1#PBF?
LTM4601AEV-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTM4601AEV-1#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 LTM4601AEV-1#PBF?
For technical support, including LTM4601AEV-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTM4601AEV-1#PBF requirements.
6.How does Aetrix verify that LTM4601AEV-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTM4601AEV-1#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 LTM4601AEV-1#PBF meets industry standards.
7.What is the process for return or replacement of LTM4601AEV-1#PBF?
All LTM4601AEV-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTM4601AEV-1#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 LTM4601AEV-1#PBF part is unused and in its original packaging.
Return procedure for LTM4601AEV-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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