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Analog Devices Inc./Maxim Integrated MAX1921EVKIT
- Part No.:
- MAX1921EVKIT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- Datasheet:
-
MAX1921EVKIT.pdf
- Description:
- EVAL BOARD FOR MAX1921
- Quantity:
- Payment:
- Shipping:
Inventory:4,756
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Product details
Overview
MAX1921EVKIT from Maxim Integrated is an evaluation kit for the MAX1921 fixed-output 400mA step-down DC-DC converter in SOT23-6, supporting factory-preset voltages (1.5V/1.8V/2.5V/3.0V/3.3V), 2V–5.5V input range, 1.2MHz max switching frequency, and internal synchronous rectification. It enables rapid validation of power delivery in space-constrained battery-powered handheld devices.
For engineers reviewing the MAX1921EVKIT datasheet, MAX1921EVKIT pinout, MAX1921EVKIT application, or MAX1921EVKIT equivalent, this kit provides verified reference design, layout-optimized PCB, component selection guidance, and transient response characterization for MAX1921-based 1.5–3.3V supply rails in wireless handsets and PDAs.
Technical Context
The MAX1921EVKIT implements the MAX1921's proprietary current-limited control scheme with 400ns minimum on/off times, enabling stable regulation across 0–400mA load while maintaining >90% efficiency at medium loads. Its board integrates the recommended 4.7µH inductor, 4.7µF input capacitor, and 4.7µF output ceramic capacitor per Figure 1 of the MAX1921 datasheet.
It supports voltage positioning architecture via LX node feedback (R1) and feed-forward capacitor (CFF), delivering controlled load regulation to minimize undershoot/overshoot during 20mA–320mA transients-critical for CDMA power amplifier supply stability and PDA core rail integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supported Device | MAX1921 fixed-output step-down converter (1.5V/1.8V/2.5V/3.0V/3.3V variants) |
| Input Voltage Range | 2V to 5.5V - matches Li+ cell and multi-cell alkaline operation without external LDO pre-regulation |
| Max Output Current | 400mA - validated with thermal margin using standard 2-layer PCB layout per datasheet |
| Switching Frequency | Up to 1.2MHz - enables use of compact 4.7µH inductors and low-ESR ceramic capacitors |
| Quiescent Current | 50µA - ensures minimal battery drain in standby mode for portable equipment |
| Shutdown Current | 0.1µA - allows deep-sleep power management in host system firmware |
| Output Accuracy | ±1.5% initial, ±3% over -40°C to +85°C - meets tight tolerance requirements for RF PA bias rails |
Availability
MAX1921EVKIT is available at Aetrix Electronics and suitable for wireless handset development, PDA power subsystem validation, and CDMA amplifier supply qualification requiring stable component supply, full documentation access, and repeatable lab testing capability.
Supply support for MAX1921EVKIT 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, communications, and consumer applications.
The MAX1921EVKIT belongs to Maxim's high-efficiency, ultra-small-footprint DC-DC evaluation platform family, engineered specifically to accelerate design-in of low-voltage, high-current buck converters in battery-powered portable electronics.
FAQ
What is the primary function of the MAX1921EVKIT?
The MAX1921EVKIT is a fully assembled and tested evaluation board for the MAX1921 fixed-output step-down DC-DC converter. It provides immediate hardware validation of the MAX1921's performance-including efficiency, transient response, and thermal behavior-using the manufacturer-recommended layout, component values, and test conditions defined in the MAX1921 datasheet.
Which MAX1921 output voltage variants does the MAX1921EVKIT support?
The MAX1921EVKIT supports all five factory-preset MAX1921 output voltage options: 1.5V (MAX1921EUT15), 1.8V (MAX1921EUT18), 2.5V (MAX1921EUT25), 3.0V (MAX1921EUT30), and 3.3V (MAX1921EUT33). The board accommodates these variants via jumper-selectable feedback network configurations aligned with the MAX1921 Selector Guide.
Does the MAX1921EVKIT include layout-optimized PCB design files?
Yes, the MAX1921EVKIT includes complete Gerber files, assembly drawings, and bill-of-materials documentation as part of its official evaluation kit package. These files reflect Maxim's validated star-ground topology, short high-current paths for IN/LX/PGND, and critical placement of CIN, COUT, and CFF components within 5mm of their respective pins-ensuring EMI robustness and regulation stability.
Can the MAX1921EVKIT be used to evaluate the MAX1920 adjustable version?
No-the MAX1921EVKIT is specifically designed for the fixed-output MAX1921 family and uses a non-adjustable feedback network optimized for 1.5–3.3V presets. To evaluate the MAX1920 adjustable variant, engineers must use the separate MAX1920EVKIT, which includes R1/R2 resistor networks and FB node routing for external voltage setting.
What transient performance metrics are validated on the MAX1921EVKIT?
The MAX1921EVKIT demonstrates load transient response per Figure 15 of the MAX1921 datasheet: ≤100mV output deviation for 20mA→320mA steps at 1.5V output, with recovery time under 40µs. This is achieved using voltage positioning architecture (LX feedback + CFF feed-forward), confirmed by oscilloscope waveforms included in the MAX1921EVKIT user guide.
MAX1921EVKIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Main Purpose:
- DC/DC, Step Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 1.8V
- Voltage - Input:
- 400mA
- Regulator Topology:
- 2V ~ 5.5V
- Frequency - Switching:
- Buck
- Contents:
- -
- Utilized IC / Part:
- Board(s)
- Power - Output:
- MAX1921
MAX1921EVKIT FAQ
1.How can I place an order for MAX1921EVKIT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1921EVKIT 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 MAX1921EVKIT reliable?
The price and inventory of MAX1921EVKIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1921EVKIT is usually 5 days.
3.What payment methods are accepted for MAX1921EVKIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1921EVKIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1921EVKIT?
MAX1921EVKIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1921EVKIT 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 MAX1921EVKIT?
For technical support, including MAX1921EVKIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1921EVKIT requirements.
6.How does Aetrix verify that MAX1921EVKIT is sourced from the original manufacturer or authorized distributors?
All MAX1921EVKIT 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 MAX1921EVKIT meets industry standards.
7.What is the process for return or replacement of MAX1921EVKIT?
All MAX1921EVKIT units undergo pre-shipment inspection (PSI). If there is an issue with MAX1921EVKIT, 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 MAX1921EVKIT part is unused and in its original packaging.
Return procedure for MAX1921EVKIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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