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Analog Devices Inc. DC653A
- Part No.:
- DC653A
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC653A.pdf
- Description:
- EVAL BOARD FOR LTC3802
- Quantity:
- Payment:
- Shipping:
Inventory:2,741
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Product details
Overview
DC653A from Analog Devices is a dual-output, high-frequency synchronous step-down DC/DC demonstration circuit built around the LTC3802EGN controller. It delivers 3.3V/15A and 2.5V/15A from a 7V–24V input, operates at 550kHz nominal switching frequency, supports programmable rail tracking (ratiometric or coincident), and requires no airflow at ≤30°C ambient-ideal for compact, high-density power delivery in portable instrumentation.
For engineers reviewing the DC653A datasheet, DC653A pinout, DC653A application, or DC653A equivalent, this page provides verified board-level performance data-including efficiency curves at 7V/12V/24V input, load-step response waveforms, output ripple measurements, and jumper-configurable bias and tracking modes-enabling rapid validation of multi-rail sequencing and transient behavior in battery-powered systems.
Technical Context
DC653A implements two independent synchronous buck regulators controlled by the LTC3802EGN, each with voltage-mode control, 330kHz–750kHz phase-lockable switching, and external gate drive for discrete MOSFETs. The board integrates on-board 5V bias generation (via dedicated buck) or supports external 4.5V–6.0V supply via JP1.
Rail tracking is implemented via JP4 selection (RATIOMETRIC or COINCIDENT), with ramp control enabled by shorting/releasing the PHASE pin to ground-demonstrating precise startup/shutdown sequencing without additional ICs or firmware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7V to 24V - supports wide industrial and battery-derived supplies including 12V nominal and 24V automotive rails. |
| Output #1 | 3.3V ±3% / 15A - tightly regulated main logic rail compatible with FPGA, SoC, and memory interfaces. |
| Output #2 | 2.5V ±3% / 15A - auxiliary rail suitable for analog subsystems, ADC/DAC references, or I/O voltage domains. |
| Switching Frequency | 550kHz nominal, 330–750kHz PLL-syncable - enables compact magnetics and low EMI without sacrificing thermal performance. |
| Efficiency (VOUT1) | 94.5% @ 7V/15A - high light-load and full-load efficiency reduces thermal stress in sealed enclosures. |
| Airflow Requirement | No airflow required at TAMB ≤ 30°C - simplifies mechanical design for fanless portable or embedded deployments. |
| Rail Tracking Modes | Ratiometric or coincident via JP4 - ensures safe power-up/down sequencing for multi-voltage ASICs and processors. |
Availability
DC653A is available at Aetrix Electronics and suitable for notebook computers, portable test instruments, and battery-operated medical devices requiring stable component supply, validated multi-rail sequencing, and fast transient response under dynamic load conditions.
Supply support for DC653A 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 designs precision analog, mixed-signal, and power management ICs for signal chain, sensing, and energy-efficient power conversion applications.
The DC653A belongs to Analog Devices' demonstration circuit portfolio for high-performance DC/DC controllers, developed to showcase robust dual-rail regulation, rail tracking, and transient response in real-world PCB layouts.
FAQ
What is the primary function of the DC653A demonstration circuit?
The DC653A demonstration circuit is a fully assembled, tested dual-output synchronous buck converter platform that validates the LTC3802EGN controller's performance. It delivers 3.3V/15A and 2.5V/15A from a 7V–24V input, enabling engineers to evaluate rail tracking, load-step response, efficiency, and thermal behavior without designing from scratch. DC653A serves as a reference for layout, component selection, and system integration of high-current, multi-rail power supplies.
Does DC653A require external cooling or forced airflow?
No, DC653A is designed for natural convection cooling and requires no airflow at ambient temperatures up to 30°C, as confirmed by thermal testing across full load and input voltage range. This makes DC653A suitable for sealed or fanless enclosures in portable instrumentation and battery-powered equipment where acoustic noise and reliability are critical. DC653A achieves this through optimized MOSFET selection, low-ESR output capacitors, and efficient thermal layout.
How is rail tracking configured on DC653A?
Rail tracking on DC653A is selected via jumper JP4: RATIOMETRIC mode maintains proportional voltage ramp rates between outputs, while COINCIDENT mode aligns their start/stop timing. Ramp control is further managed by shorting or releasing the PHASE pin to ground-enabling precise sequencing during power-up and shutdown. DC653A demonstrates both modes with oscilloscope-validated waveforms in Figures 10–13 of its Quick Start Guide.
Can DC653A operate with an external 5V bias supply?
Yes, DC653A supports external 5V bias via jumper JP1 set to EXT5V position. The external supply must be 4.5V–6.0V and powers the LTC3802EGN's gate drivers and internal logic. This option allows evaluation under lab-controlled bias conditions or integration into systems where a clean, regulated 5V rail is already available. When using external bias, the on-board 5V buck regulator is disabled, reducing self-consumption and improving measurement accuracy for the main outputs.
What load-step performance does DC653A demonstrate?
DC653A demonstrates fast load-step response: Figures 8 and 9 show <150µs recovery time for 7.5A→15A steps on both 3.3V and 2.5V outputs at 12V input and 525kHz switching. Output voltage deviation remains within ±30mV, confirming tight regulation under dynamic loads typical of FPGA core switching or processor burst activity. DC653A uses on-board MOSFETs and pulse generators to enable repeatable, lab-ready transient testing without external hardware.
DC653A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Main Purpose:
- DC/DC, Step Down
- Outputs and Type:
- 2 Non-Isolated Outputs
- Voltage - Output:
- -
- Current - Output:
- 2.5V, 3.3V
- Voltage - Input:
- 15A, 15A
- Regulator Topology:
- 7V ~ 24V
- Frequency - Switching:
- Buck
- Contents:
- 550kHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- LTC3802
DC653A FAQ
1.How can I place an order for DC653A through Aetrix?
Please submit a Request for Quotation (RFQ) for DC653A 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 DC653A reliable?
The price and inventory of DC653A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC653A is usually 5 days.
3.What payment methods are accepted for DC653A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC653A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC653A?
DC653A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC653A 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 DC653A?
For technical support, including DC653A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC653A requirements.
6.How does Aetrix verify that DC653A is sourced from the original manufacturer or authorized distributors?
All DC653A 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 DC653A meets industry standards.
7.What is the process for return or replacement of DC653A?
All DC653A units undergo pre-shipment inspection (PSI). If there is an issue with DC653A, 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 DC653A part is unused and in its original packaging.
Return procedure for DC653A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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