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Analog Devices Inc. DC1083A-B
- Part No.:
- DC1083A-B
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC1083A-B.pdf
- Description:
- EVAL BOARD FOR LTM4603HV
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Product details
Overview
LTM4603HV from Analog Devices (formerly Linear Technology) is a 6A, 28V-input µModule DC/DC step-down regulator in a 15mm × 15mm × 2.82mm LGA package. It delivers 0.6V–5V output with ±0.25% load regulation, 1MHz switching frequency, and supports output voltage tracking, margining, and PLL synchronization - used for high-density point-of-load regulation in telecom base stations.
For engineers reviewing the LTM4603HV datasheet, LTM4603HV pinout, LTM4603HV application, or LTM4603HV equivalent, this page provides verified technical context, validated pin functions, confirmed efficiency curves (up to 93% at 5VIN/3.3VOUT), remote sense amplifier specs (1.25mV offset, 100dB CMRR), and real-world transient response data (35mV peak deviation, 25µs settling).
Technical Context
The LTM4603HV integrates a constant on-time current mode controller, high-efficiency MOSFETs, power inductor, and support circuitry into a single surface-mount module. Its adaptive on-time architecture enables ultrafast transient response without external compensation, while the onboard remote sense amplifier maintains ±0.25% load regulation accuracy for outputs ≤3.3V.
It supports PolyPhase® operation via PLLIN synchronization and offers programmable soft-start (via TRACK/SS), precision margining (MPGM/MARG0/MARG1), and foldback overcurrent protection. Input UVLO is fixed at 3.2V–4.0V, and PGOOD asserts within ±10% of VFB after 25µs mask timer.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V DC - supports wide-range industrial and telecom supplies without pre-regulation |
| Output Current | 6A continuous / 8A peak - sustains full load across full temperature range with derating curves provided |
| Output Voltage Range | 0.6V to 5.0V - programmed via single resistor (RSET) from VFB to SGND |
| Switching Frequency | 1MHz typical - enables compact magnetics and low EMI with fast transient response |
| Load Regulation | ±0.25% - achieved using remote sense amplifier (VOSNS+/VOSNS−) for precision at load point |
| Efficiency | Up to 93% at 5VIN/3.3VOUT, 6A - measured with ceramic input/output capacitors per typical application |
| Package Dimensions | 15mm × 15mm × 2.82mm LGA - 118-lead land grid array for high-density PCB mounting, including backside placement |
Pinout & Package
118-lead LGA package (15mm × 15mm × 2.82mm, 1.7g), RoHS-compliant with e4 gold-finish pads. Thermal resistance: θJA = 15°C/W (95mm × 76mm 4-layer PCB), θJC = 6°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Bank 1) | Power Input | Primary DC input connection; requires local 20µF+ ceramic decoupling to PGND |
| VOUT (Bank 3) | Power Output | Main regulated output path; connects directly to load or remote sense point via VOUT_LCL |
| PGND (Bank 2) | Power Ground | Common return for input and output currents; must be low-inductance connection to bulk caps |
| VOSNS+, VOSNS− | Remote Sense Inputs | Differential inputs to precision amplifier (1.25mV offset); used only for VOUT ≤3.3V |
| DIFFVOUT | Remote Sense Output | Amplifier output tied to VOUT_LCL; enables Kelvin sensing at load for <±0.25% regulation |
| TRACK/SS | Tracking & Soft-Start | Capacitor-programmable ramp rate for startup or multi-rail sequencing; also accepts resistor divider for slave tracking |
| MPGM, MARG0, MARG1 | Margining Control | Programmable ±% margin (via MPGM resistor) with digital selection (MARG0/MARG1 truth table) for production test |
| PLLIN | Frequency Sync Input | 50kΩ internally terminated; accepts external clock (2V–INTVCC) to synchronize switching and enable PolyPhase® operation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | Complete buck solution: controller + MOSFETs + inductor + compensation - eliminates layout-sensitive loop tuning |
| Ultrafast Transient Response | 35mV peak deviation and 25µs settling for 50% load step - enabled by current-mode control and adaptive on-time architecture |
| Output Voltage Margining | Programmable ±% margin (e.g., ±5%) via MPGM resistor and MARG0/MARG1 logic states - supports automated functional test |
| Remote Sensing Accuracy | ±0.25% load regulation with 100dB CMRR and 2V/µs slew rate - maintains tight tolerance at point-of-load under varying trace IR drop |
| Thermal-Optimized Package | 2.82mm profile and 1.7g weight - allows mounting on PCB backside to conserve front-side real estate in space-constrained systems |
Applications
| Telecom Base Station PSU | Server Point-of-Load |
|---|---|
Use Scenario: Regulating 1.8V/3.3V rails for FPGA I/O banks and memory interfaces in 5G radio units. IC Role / Device Role / Timing Role: Primary non-isolated DC/DC converter delivering stable, low-noise power with precise tracking between multiple voltage domains. Use Value: Enables simultaneous power-up of core and I/O rails via TRACK/SS; remote sensing compensates for >100mΩ board trace resistance. |
Use Scenario: Providing 1.2V/2.5V CPU core and auxiliary rails in rack-mounted servers with strict ripple and transient requirements. IC Role / Device Role / Timing Role: High-current, high-efficiency µModule supporting dynamic load steps up to 3A/µs without voltage droop exceeding 35mV. Use Value: 93% efficiency at 5VIN/3.3VOUT reduces thermal load; PolyPhase® sync via PLLIN lowers input RMS ripple in multi-phase designs. |
| Industrial PLC Controller | Test & Measurement Equipment |
Use Scenario: Generating isolated 5V and 3.3V system rails from 24V industrial bus in programmable logic controllers. IC Role / Device Role / Timing Role: Wide-input (4.5V–28V) buck regulator with robust UVLO (3.2V–4.0V) and overvoltage protection for harsh environments. Use Value: 125°C junction rating and –40°C to +85°C operating range ensure reliability; PGOOD signal enables safe power sequencing. |
Use Scenario: Supplying precision analog circuitry (ADCs, DACs, op-amps) requiring ultra-low noise and tight regulation in bench instruments. IC Role / Device Role / Timing Role: Low-ripple, marginable power source with programmable soft-start and ±0.25% load regulation for calibration-critical subsystems. Use Value: Margining supports production test at ±5% VOUT; 10mVP-P ripple at 1.5V/6A meets high-resolution measurement noise budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current µModule DC/DC regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTM4601HV | Same 15mm × 15mm LGA package and pinout; lower 4A continuous current rating; no margining pins (MPGM/MARG0/MARG1) | Not suitable for 6A loads or production margin testing; lacks MARGx control logic and MPGM programming | Select LTM4601HV only if load current ≤4A and margining is unnecessary |
| LTM4625 | 3.5A rated, 9mm × 11.9mm LGA, 500kHz–3MHz adjustable frequency; no PLLIN or TRACK/SS; different pin assignment | Smaller footprint but incompatible pinout and feature set; no remote sense amplifier or margining capability | Choose LTM4625 for space-constrained designs where 3.5A suffices and synchronization/tracking are not required |
Compared with LTM4603HV, LTM4601HV offers pin compatibility but sacrifices 33% current capacity and all margining functionality, while LTM4625 trades size and frequency flexibility for complete loss of tracking, PLL sync, and remote sensing - making LTM4603HV uniquely suited for high-accuracy, high-current, multi-rail telecom and server applications.
Availability
LTM4603HV is available at Aetrix Electronics and suitable for telecom infrastructure, server power delivery, and industrial PLC applications requiring stable component supply, long-term lifecycle management, and traceable sourcing.
Supply support for LTM4603HV 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 ICs, serving aerospace, industrial, automotive, and communications markets.
The LTM4603HV belongs to the µModule regulator product line - designed to simplify high-current, high-efficiency DC/DC conversion by integrating power train, control, and passive components into rugged, thermally optimized packages for demanding embedded systems.
FAQ
What is the maximum continuous output current of the LTM4603HV?
The LTM4603HV delivers 6A continuous output current across its full operating temperature range (–40°C to +85°C), with 8A peak capability. Derating curves are provided in the datasheet for combinations of input voltage, output voltage, and ambient temperature to ensure thermal compliance. The LTM4603HV achieves this with no external compensation or complex layout rules due to its integrated current-mode architecture.
Does the LTM4603HV support remote voltage sensing, and how is it implemented?
Yes, the LTM4603HV supports remote voltage sensing for outputs ≤3.3V using dedicated VOSNS+ and VOSNS− pins. These connect to the load's power and ground points, feeding a precision differential amplifier (1.25mV offset, 100dB CMRR) whose output (DIFFVOUT) connects to VOUT_LCL. This configuration enables ±0.25% load regulation accuracy independent of PCB trace resistance - critical for high-current, low-voltage rails.
How is output voltage programmed on the LTM4603HV?
Output voltage is programmed by connecting a single resistor (RSET) from the VFB pin to SGND. The internal 0.6V reference and 60.4kΩ feedback resistor form a divider; VOUT = 0.6V × (60.4k + RSET) / RSET. Standard 1% values yield outputs from 0.6V (open) to 5.0V (8.25kΩ). For example, 19.1kΩ sets 2.5V output. The LTM4603HV does not require trimming or additional components for basic operation.
Can multiple LTM4603HV modules be synchronized for PolyPhase® operation?
Yes, the LTM4603HV supports PolyPhase® operation via its PLLIN pin, which accepts an external clock (2V–INTVCC) to synchronize switching frequency and phase. This reduces input/output ripple current and improves thermal distribution in multi-module designs. Phase offset is automatically managed when modules share the same PLLIN signal - no external timing circuitry is needed to achieve interleaved operation.
What protection features does the LTM4603HV include?
The LTM4603HV includes cycle-by-cycle current limiting, foldback overcurrent protection (activated when VFB drops >50%), output overvoltage protection (OVP), input undervoltage lockout (UVLO: 3.2V–4.0V), and open-drain PGOOD monitoring (±10% window with 25µs mask timer). All protections operate autonomously without external components, ensuring robust fault handling in mission-critical power systems.
DC1083A-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- µModule®
- Packaging:
- Box
- Product Status:
- Active
- Main Purpose:
- DC/DC, Step Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 0.6V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, or 5V
- Voltage - Input:
- 6A
- Regulator Topology:
- 4.5V ~ 28V
- Frequency - Switching:
- Buck
- Contents:
- 1MHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- LTM4603HV
DC1083A-B FAQ
1.How can I place an order for DC1083A-B through Aetrix?
Please submit a Request for Quotation (RFQ) for DC1083A-B 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 DC1083A-B reliable?
The price and inventory of DC1083A-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC1083A-B is usually 5 days.
3.What payment methods are accepted for DC1083A-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC1083A-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC1083A-B?
DC1083A-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC1083A-B 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 DC1083A-B?
For technical support, including DC1083A-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC1083A-B requirements.
6.How does Aetrix verify that DC1083A-B is sourced from the original manufacturer or authorized distributors?
All DC1083A-B 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 DC1083A-B meets industry standards.
7.What is the process for return or replacement of DC1083A-B?
All DC1083A-B units undergo pre-shipment inspection (PSI). If there is an issue with DC1083A-B, 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 DC1083A-B part is unused and in its original packaging.
Return procedure for DC1083A-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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