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Analog Devices Inc. DC476A
- Part No.:
- DC476A
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC476A.pdf
- Description:
- EVAL BOARD FOR LT1765
- Quantity:
- Payment:
- Shipping:
Inventory:1,742
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Product details
Overview
DC476A from Analog Devices (formerly Linear Technology) is a demonstration circuit board built around the LT1765EFE monolithic step-down DC/DC converter IC. It delivers 3.3V or 5V at up to 2A from 4.7–25V input, features 1.25MHz fixed-frequency current-mode control, 0.09Ω internal MOSFET RDS(ON), and supports shutdown and synchronization. It is used for rapid evaluation of buck converter performance in space-constrained power designs.
For engineers reviewing the DC476A datasheet, DC476A pinout, DC476A application, or DC476A equivalent, key selection considerations include its pre-validated 2A load capability, ceramic-capacitor-optimized layout, jumper-selectable output voltage, and support for input ranges spanning automotive, cable modem, and industrial embedded systems.
Technical Context
The DC476A implements a constant-frequency current-mode buck topology using the LT1765EFE controller with integrated 3A peak switch. Its 1.25MHz switching frequency enables compact external magnetics and ceramic capacitors, while the current-mode architecture ensures fast transient response and stable loop behavior with minimal compensation components.
Input voltage range is configurable: 7–25V for 5V output, or 4.7–18V (up to 25V) for 3.3V output. The board includes SHDN and SYNC terminals, feedforward capacitor (C4), and adjustable feedback resistors (R1/R2) - enabling both functional validation and user customization of output voltage and dynamic response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Jumper-selectable 3.3V or 5.0V; supports user-defined values via feedback resistor scaling. |
| Max Output Current | 2A continuous; validated across full input range with thermal management on standard PCB. |
| Input Voltage Range | 4.7V–25V (3.3V mode); 7V–25V (5V mode); minimum VIN constrained by duty cycle and dropout margin. |
| Switching Frequency | Fixed 1.25MHz; enables use of small 0805/1206 ceramic capacitors and low-profile shielded inductors. |
| Peak Efficiency | Up to 90% at 1A (5V mode, VIN=24V); up to 85% at 2A (3.3V mode, VIN=18V). |
| Control Topology | Current-mode PWM; provides inherent cycle-by-cycle current limiting and simplified loop compensation. |
| Shutdown Current | 15µA typical (via SHDN pin); extends battery runtime in portable applications. |
Availability
DC476A is available at Aetrix Electronics and suitable for cable modem power supplies, handheld device DC/DC conversion, and automotive infotainment subsystems requiring stable component supply, pre-validated reference design, and rapid prototyping support.
Supply support for DC476A 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 high-performance analog, mixed-signal, and power management ICs for precision signal chain and power conversion applications.
The DC476A belongs to Linear Technology's Demonstration Circuit series - engineered to accelerate customer evaluation of specific ICs like the LT1765EFE in real-world power architectures.
FAQ
What is the DC476A used for?
The DC476A is a fully assembled demonstration circuit designed to evaluate the LT1765EFE monolithic step-down converter. It provides immediate hardware validation of 3.3V/5V at 2A output, supports efficiency measurement, transient testing, and layout verification - eliminating the need for custom PCB development during early power stage design.
Does the DC476A require external components to operate?
No - the DC476A is a complete, ready-to-use board. It includes all critical components: LT1765EFE IC, power inductor (CDRH5D28-2R5M), Schottky diode (B320A/B220A), ceramic input/output capacitors, feedback resistors, and boost capacitor (C8). Only input power, output load, and optional test equipment are needed for operation.
Can the DC476A be modified for different output voltages?
Yes - the DC476A supports user-defined outputs via the feedback resistor divider (R1/R2). Schematics in the Quick Start Guide show configurations for 1.8V, 2.5V, and 3.3V/5V. For outputs below 3.3V, the boost diode must be relocated from D2 to D3, and C8 voltage rating must exceed VIN.
What is the role of the SYNC pin on the DC476A?
The SYNC pin on the DC476A allows external clock synchronization of the LT1765EFE's 1.25MHz switching frequency up to 2MHz. This feature reduces EMI by aligning multiple converters and avoids beat frequencies in multi-rail systems - the terminal may be left floating if unused.
How does the DC476A handle thermal performance at full 2A load?
The DC476A achieves thermal stability at 2A through optimized copper pour, low-RDS(ON) (0.09Ω) internal switch, and selected components rated for continuous operation. Efficiency data shows ≥85% at 2A (3.3V mode, VIN=18V), limiting power dissipation to <0.5W under typical conditions - no heatsink required on standard FR-4.
DC476A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Obsolete
- Main Purpose:
- DC/DC, Step Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 3.3V or 5V
- Voltage - Input:
- 2A
- Regulator Topology:
- 3V ~ 25V
- Frequency - Switching:
- Buck
- Contents:
- 1.25MHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- LT1765
DC476A FAQ
1.How can I place an order for DC476A through Aetrix?
Please submit a Request for Quotation (RFQ) for DC476A 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 DC476A reliable?
The price and inventory of DC476A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC476A is usually 5 days.
3.What payment methods are accepted for DC476A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC476A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC476A?
DC476A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC476A 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 DC476A?
For technical support, including DC476A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC476A requirements.
6.How does Aetrix verify that DC476A is sourced from the original manufacturer or authorized distributors?
All DC476A 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 DC476A meets industry standards.
7.What is the process for return or replacement of DC476A?
All DC476A units undergo pre-shipment inspection (PSI). If there is an issue with DC476A, 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 DC476A part is unused and in its original packaging.
Return procedure for DC476A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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