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Analog Devices Inc. DC422A-B
- Part No.:
- DC422A-B
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC422A-B.pdf
- Description:
- EVAL BOARD FOR LTC3405
- Quantity:
- Payment:
- Shipping:
Inventory:3,677
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Product details
Overview
DC422A-B from Analog Devices (formerly Linear Technology) is a demonstration board for the LTC3405 monolithic synchronous buck regulator, configured as a constant-frequency step-down converter delivering 1.8V at up to 250mA from 2.65V–6V input. It operates at 1.5MHz switching frequency, supports Burst Mode™ (25µA no-load quiescent current), and features MODE and RUN jumpers for mode selection and shutdown control.
For engineers reviewing the DC422A-B datasheet, DC422A-B pinout, DC422A-B application, or DC422A-B equivalent, key considerations include input voltage range compatibility, 1.5MHz fixed-frequency operation, jumper-configurable Burst Mode™ vs. pulse-skipping mode, shutdown functionality via RUN pin, and suitability for low-profile, battery-powered portable designs using SOT-23-6 regulators.
Technical Context
The DC422A-B implements the LTC3405 - a current-mode, monolithic synchronous buck regulator with integrated 0.15Ω/0.25Ω PMOS/NMOS power switches. Its 1.5MHz fixed-frequency PWM operation enables compact external components, while Burst Mode™ provides ultra-low IQ (25µA typical at no load) for extended battery life.
Mode selection is hardware-controlled: JP1 configures MODE pin connection to GND (Burst Mode™) or VIN (pulse-skipping), and JP2 pulls RUN pin to GND to disable regulation. The board uses discrete 0805 inductors and ceramic capacitors optimized for high efficiency (>90% at 250mA/1.8V) and minimal EMI in handheld applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.65V to 6V - supports single-cell Li-ion, Li-polymer, and multi-cell alkaline/NiMH battery inputs. |
| Output Voltage | 1.8V fixed - factory-set by internal resistor divider; no external feedback required. |
| Max Output Current | 250mA - sustained delivery with thermal management via PCB copper pour and SOT-23-6 package. |
| Switching Frequency | 1.5MHz - enables use of small 0805 inductors and low-ESR ceramic capacitors. |
| No-Load Quiescent Current | 25µA in Burst Mode™ - extends runtime in standby or sleep states of portable devices. |
| Shutdown Current | <1µA - achieved by grounding RUN pin via JP2; eliminates system-level leakage paths. |
Availability
DC422A-B is available at Aetrix Electronics and suitable for battery-powered handheld instruments, portable medical sensors, and low-power IoT edge nodes requiring stable component supply and rapid evaluation of synchronous buck regulation.
Supply support for DC422A-B 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The DC422A-B belongs to Linear's legacy demonstration circuit portfolio, designed specifically to accelerate prototyping and validation of their monolithic DC/DC regulators in space-constrained, battery-operated systems.
FAQ
What is the purpose of the JP1 jumper on the DC422A-B?
The JP1 jumper on the DC422A-B selects the operating mode of the LTC3405 regulator: upper position connects MODE to GND to enable Burst Mode™ (ultra-low quiescent current), while lower position connects MODE to VIN to select pulse-skipping mode (lower output ripple). Leaving MODE floating is prohibited per the DC422A-B design guidelines.
How do I shut down the DC422A-B board?
To shut down the DC422A-B board, insert jumper JP2 into the upper position to pull the RUN pin to ground. This disables the LTC3405 regulator, reducing total board current to less than 1µA. The RUN pin must not be left unconnected, and VIN must remain within 2.65V–6V during shutdown activation.
What is the output voltage of the DC422A-B and is it adjustable?
The DC422A-B delivers a fixed 1.8V output voltage set by the internal feedback divider of the LTC3405. It is not user-adjustable; no external resistors or trim points are provided on the board. The 1.8V output targets low-voltage microcontrollers and digital logic in portable applications supported by the DC422A-B.
Can the DC422A-B operate from a 5V USB supply?
Yes, the DC422A-B can operate from a 5V USB supply, as its input range (2.65V–6V) fully covers standard USB 2.0/3.0 VBUS. However, hot-plugging above 5.5V or exceeding 6V risks damage per the DC422A-B Quick Start Guide, so ensure stable 5V source compliance before connection.
What package type does the LTC3405 use on the DC422A-B board?
The LTC3405 on the DC422A-B board is mounted in a 6-pin SOT-23 package (LTC3405ES6), confirmed by the board silkscreen and Linear Technology documentation. This thermally enhanced, surface-mount package enables compact layout and efficient heat dissipation in the DC422A-B's low-profile design.
DC422A-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Main Purpose:
- DC/DC, Step Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 1.8V
- Voltage - Input:
- 250mA
- Regulator Topology:
- 2.65V ~ 6V
- Frequency - Switching:
- Buck
- Contents:
- 1.5MHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- LTC3405
DC422A-B FAQ
1.How can I place an order for DC422A-B through Aetrix?
Please submit a Request for Quotation (RFQ) for DC422A-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 DC422A-B reliable?
The price and inventory of DC422A-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC422A-B is usually 5 days.
3.What payment methods are accepted for DC422A-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DC422A-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DC422A-B?
DC422A-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DC422A-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 DC422A-B?
For technical support, including DC422A-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC422A-B requirements.
6.How does Aetrix verify that DC422A-B is sourced from the original manufacturer or authorized distributors?
All DC422A-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 DC422A-B meets industry standards.
7.What is the process for return or replacement of DC422A-B?
All DC422A-B units undergo pre-shipment inspection (PSI). If there is an issue with DC422A-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 DC422A-B part is unused and in its original packaging.
Return procedure for DC422A-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DC422A-B Tags
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