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STMicroelectronics STEVAL-ISA094V1
- Part No.:
- STEVAL-ISA094V1
- Manufacturer:
- STMicroelectronics
- Package:
- Datasheet:
-
STEVAL-ISA094V1.pdf
- Description:
- EVAL BOARD FOR L7981
- Quantity:
- Payment:
- Shipping:
Inventory:2,722
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Product details
Overview
STEVAL-ISA094V1 from STMicroelectronics is a 3 A step-down switching power supply demonstration board based on the L7981 HSOP8 synchronous buck regulator. It supports 4.5 V–28 V input, delivers adjustable 0.6 V–VIN output, operates at 250 kHz (programmable up to 1 MHz), and features internal soft-start, enable control, voltage feed-forward, and overcurrent/thermal protection.
For engineers reviewing the STEVAL-ISA094V1 datasheet, STEVAL-ISA094V1 pinout, STEVAL-ISA094V1 application, or STEVAL-ISA094V1 equivalent, this board enables rapid evaluation of high-current DC-DC conversion in industrial power supplies, embedded system rails, and battery-powered equipment requiring stable low-voltage regulation with minimal external components.
Technical Context
The board implements a non-isolated synchronous buck topology using the L7981 IC, which integrates a high-side power MOSFET and current-mode PWM controller. Input-to-output voltage ratio is managed via voltage feed-forward compensation, enabling stable operation across wide VIN ranges without loop re-tuning.
It supports zero-load operation and 100% duty-cycle low-dropout mode for ultra-low output voltages near VIN, while thermal shutdown and cycle-by-cycle overcurrent protection ensure robustness during fault conditions and transient load steps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3 A continuous - supports high-power microcontroller cores or FPGA I/O banks. |
| Input Voltage Range | 4.5 V to 28 V - compatible with 5 V, 12 V, and 24 V industrial bus rails. |
| Output Voltage Range | 0.6 V to VIN - enables generation of sub-1 V logic rails (e.g., 0.8 V for ARM Cortex-A cores). |
| Switching Frequency | 250 kHz (default), programmable up to 1 MHz - balances efficiency vs. EMI and inductor size trade-offs. |
| Protection Features | Overcurrent + thermal shutdown - prevents damage during short-circuit or overheating events. |
| Soft-Start | Internal - limits inrush current during power-up, avoiding input rail sag. |
Availability
STEVAL-ISA094V1 is available at Aetrix Electronics and suitable for industrial power supply design, embedded system power rail validation, and battery-fed portable equipment development requiring stable component supply and fast prototyping capability.
Supply support for STEVAL-ISA094V1 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer applications.
This board belongs to ST's STEVAL evaluation platform family, engineered to accelerate adoption of ST's high-current DC-DC regulators by providing fully tested, documented reference designs with validated layout and thermal performance.
FAQ
What is the primary function of the STEVAL-ISA094V1?
The STEVAL-ISA094V1 is a demonstration board for evaluating the L7981 synchronous buck regulator. Its primary function is to provide a ready-to-use, fully assembled platform for testing 3 A step-down DC-DC conversion across 4.5–28 V input, with adjustable 0.6 V–VIN output, under real-world thermal and load conditions.
Does STEVAL-ISA094V1 require external programming or configuration to operate?
No external programming is required. The board operates immediately upon applying input voltage within 4.5–28 V. Output voltage is set via an onboard potentiometer; switching frequency can be adjusted using an external resistor. All control functions-including enable, soft-start, and protection-are implemented internally by the L7981 IC.
Can STEVAL-ISA094V1 be used for long-term deployment in end products?
No-it is strictly a demonstration and evaluation board, not qualified for production use. It lacks conformal coating, extended temperature qualification, and production-grade reliability testing. ST recommends migrating to a custom PCB design using the L7981 IC when moving to volume manufacturing.
What are the key layout considerations validated by this board?
The board validates critical high-current buck layout practices: compact power loop routing, thermal pad grounding for the HSOP8 L7981, proper input/output capacitor placement near the IC, and separation of sensitive feedback traces from noisy switching nodes-ensuring stable regulation and minimal EMI in user designs.
STEVAL-ISA094V1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Main Purpose:
- DC/DC, Step Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 3.3V
- Voltage - Input:
- 3A
- Regulator Topology:
- 4.5V ~ 28V
- Frequency - Switching:
- Buck
- Contents:
- 250kHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- L7981
STEVAL-ISA094V1 FAQ
1.How can I place an order for STEVAL-ISA094V1 through Aetrix?
Please submit a Request for Quotation (RFQ) for STEVAL-ISA094V1 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 STEVAL-ISA094V1 reliable?
The price and inventory of STEVAL-ISA094V1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-ISA094V1 is usually 5 days.
3.What payment methods are accepted for STEVAL-ISA094V1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-ISA094V1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STEVAL-ISA094V1?
STEVAL-ISA094V1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STEVAL-ISA094V1 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 STEVAL-ISA094V1?
For technical support, including STEVAL-ISA094V1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-ISA094V1 requirements.
6.How does Aetrix verify that STEVAL-ISA094V1 is sourced from the original manufacturer or authorized distributors?
All STEVAL-ISA094V1 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 STEVAL-ISA094V1 meets industry standards.
7.What is the process for return or replacement of STEVAL-ISA094V1?
All STEVAL-ISA094V1 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-ISA094V1, 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 STEVAL-ISA094V1 part is unused and in its original packaging.
Return procedure for STEVAL-ISA094V1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STEVAL-ISA094V1 Tags
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DFR0571
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DFR0205
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DC2468A
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TPS55289EVM-093
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