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STMicroelectronics STEVAL-ISA079V2
- Part No.:
- STEVAL-ISA079V2
- Manufacturer:
- STMicroelectronics
- Package:
- Datasheet:
-
STEVAL-ISA079V2.pdf
- Description:
- EVAL BOARD FOR L6928
- Quantity:
- Payment:
- Shipping:
Inventory:4,853
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Product details
Overview
STEVAL-ISA079V2 from STMicroelectronics is a demonstration board built around the L6928 monolithic synchronous step-down DC-DC regulator, designed for high-efficiency power conversion in space-constrained portable systems. It supports 2.0 V–5.5 V input (single Li-Ion compatible), delivers up to 800 mA output, features 1.4 MHz fixed switching frequency with external synchronization (1–2 MHz), ±1% output voltage accuracy, and operates down to 0.6 V adjustable output.
For engineers reviewing the STEVAL-ISA079V2 datasheet, STEVAL-ISA079V2 application diagram, STEVAL-ISA079V2 evaluation board layout, or STEVAL-ISA079V2 alternative evaluation platforms, this page provides verified hardware configuration details, functional validation context, and design integration guidance specific to L6928-based buck regulation in battery-powered embedded systems.
Technical Context
The board implements the L6928 IC in a complete, tested synchronous buck topology with external 4.7 µH inductor, input/output capacitors, feedback divider, and SYNC input circuitry. It validates low-input-voltage operation (down to 2.0 V), 100% duty-cycle capability for ultra-low dropout, and precision output regulation via internal 0.6 V reference and error amplifier.
Designed for rapid prototyping of compact DC-DC supplies, it exposes all critical control signals - RUN, PG, SYNC, and FB - enabling system-level timing coordination, power sequencing verification, and dynamic frequency adjustment without redesigning the power stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.0 V to 5.5 V - Enables direct use with single-cell Li-Ion or Li-Poly batteries without pre-regulation. |
| Max Output Current | 800 mA - Sufficient to power microcontrollers, sensors, and RF transceivers in portable IoT nodes. |
| Switching Frequency | 1.4 MHz (fixed), synchronizable 1–2 MHz - Allows EMI optimization and small external passive component selection (e.g., 4.7 µH inductor). |
| Output Voltage Accuracy | ±1% - Ensures stable core voltage for ARM Cortex-M or low-power DSPs requiring tight rail tolerance. |
| Quiescent Current | <1 µA in shutdown - Preserves battery life during deep-sleep modes in wearable or sensor-edge devices. |
| Duty Cycle Range | 0–100% - Supports dropout operation when input drops near output voltage (e.g., 2.2 V → 1.8 V). |
Availability
STEVAL-ISA079V2 is available at Aetrix Electronics and suitable for battery-powered wearables, portable medical sensors, industrial handheld terminals, and low-power wireless modules requiring stable component supply and validated reference designs.
Supply support for STEVAL-ISA079V2 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, delivering silicon solutions for automotive, industrial, power, and embedded applications with emphasis on energy efficiency and system integration.
The STEVAL-ISA079V2 belongs to ST's ST EVAL series of application-specific evaluation boards, developed to accelerate adoption of its power management ICs by providing fully assembled, tested, and documented reference implementations.
FAQ
What is the primary function of the STEVAL-ISA079V2 board?
The STEVAL-ISA079V2 is a ready-to-use demonstration board that implements the L6928 synchronous step-down regulator in a validated 800 mA buck converter configuration. It serves as a functional reference design for evaluating efficiency, thermal performance, transient response, and PCB layout practices - not as a standalone production module.
Can the output voltage be adjusted, and how is it set?
Yes, the output voltage is adjustable from 0.6 V using an external resistor divider network connected to the FB pin. On this board, R3 (200 kΩ) and R4 (100 kΩ) configure a nominal 1.8 V output per the application diagram; changing these resistors allows precise tuning for different load requirements such as 1.2 V for MCU cores or 3.3 V for peripherals.
Does the board support external clock synchronization?
Yes, the board exposes the SYNC pin of the L6928 IC and includes associated AC-coupling components (C3 = 220 pF). It accepts external TTL/CMOS clock signals from 1 MHz to 2 MHz, enabling EMI reduction through frequency dithering or synchronization with system clocks in multi-rail power architectures.
Is short-circuit protection implemented, and how is it verified?
Yes, the L6928 IC integrates hiccup-mode short-circuit protection, and the STEVAL-ISA079V2 board retains this functionality without modification. Protection is verified per ST's characterization data: under sustained output short, the device cycles ON/OFF with ~100 ms period and limits average current to <100 mA, preventing thermal damage while maintaining safe operating area.
STEVAL-ISA079V2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- 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:
- 800mA
- Regulator Topology:
- 2V ~ 5.5V
- Frequency - Switching:
- Buck
- Contents:
- 1.4MHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- L6928
STEVAL-ISA079V2 FAQ
1.How can I place an order for STEVAL-ISA079V2 through Aetrix?
Please submit a Request for Quotation (RFQ) for STEVAL-ISA079V2 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-ISA079V2 reliable?
The price and inventory of STEVAL-ISA079V2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-ISA079V2 is usually 5 days.
3.What payment methods are accepted for STEVAL-ISA079V2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-ISA079V2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STEVAL-ISA079V2?
STEVAL-ISA079V2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STEVAL-ISA079V2 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-ISA079V2?
For technical support, including STEVAL-ISA079V2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-ISA079V2 requirements.
6.How does Aetrix verify that STEVAL-ISA079V2 is sourced from the original manufacturer or authorized distributors?
All STEVAL-ISA079V2 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-ISA079V2 meets industry standards.
7.What is the process for return or replacement of STEVAL-ISA079V2?
All STEVAL-ISA079V2 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-ISA079V2, 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-ISA079V2 part is unused and in its original packaging.
Return procedure for STEVAL-ISA079V2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STEVAL-ISA079V2 Tags
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