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STMicroelectronics STEVAL-ISA046V2
- Part No.:
- STEVAL-ISA046V2
- Manufacturer:
- STMicroelectronics
- Package:
- Datasheet:
-
STEVAL-ISA046V2.pdf
- Description:
- EVAL BOARD FOR ST1S09I
- Quantity:
- Payment:
- Shipping:
Inventory:4,840
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Product details
Overview
STEVAL-ISA046V2 from STMicroelectronics is an evaluation board for the ST1S09I synchronous buck DC-DC converter, delivering 3.3 V at up to 2 A from a 2.7–5.5 V input. It implements current-mode PWM control, features 1.5 MHz switching frequency, integrated inhibit function, short-circuit protection, and thermal shutdown. It targets low-voltage portable power rails in space-constrained applications such as handheld instrumentation and USB-powered devices.
For engineers reviewing the STEVAL-ISA046V2 datasheet, STEVAL-ISA046V2 pinout, STEVAL-ISA046V2 application, or STEVAL-ISA046V2 equivalent, this page provides verified board-level specifications, functional context, component-level design implications of the ST1S09I DFN6 3x3 IC, and supply-chain support details for prototyping and pre-production validation.
Technical Context
The board implements a fixed-output (3.3 V), high-frequency (1.5 MHz) synchronous buck topology using the ST1S09I controller IC in DFN6 3x3 package. It relies on external passive components - one inductor and two ceramic capacitors - with output set via resistor divider feedback.
Current-mode PWM control ensures fast transient response and inherent cycle-by-cycle current limiting. The inhibit function enables external logic-level enable/disable control, while internal thermal protection and short-circuit current limiting safeguard operation under fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion, Li-polymer, or dual-cell alkaline/NiMH battery inputs without pre-regulation. |
| Output Voltage | 3.3 V ±2% - tightly regulated rail for MCU I/O, sensors, and low-power logic interfaces. |
| Max Output Current | 2 A continuous - sufficient to power ARM Cortex-M microcontrollers with peripherals active. |
| Switching Frequency | 1.5 MHz - enables use of sub-2.2 µH inductors and 10–22 µF ceramic output capacitors, minimizing board area. |
| Protection Features | Inhibit control, thermal shutdown, and short-circuit current limiting - eliminates need for external fault-handling circuitry. |
| Topology | Synchronous buck with current-mode PWM - delivers >90% efficiency at 1 A load, reducing thermal load vs. linear regulators. |
Availability
STEVAL-ISA046V2 is available at Aetrix Electronics and suitable for portable instrumentation, USB-powered embedded systems, and low-voltage industrial sensor nodes requiring stable component supply during design validation and small-batch prototyping.
Supply support for STEVAL-ISA046V2 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 microcontrollers, power management ICs, analog chips, and MEMS sensors for industrial, automotive, and consumer markets.
The STEVAL-ISA046V2 belongs to ST's ST1S09 evaluation platform series, developed specifically to accelerate adoption of compact, high-efficiency synchronous buck converters in battery-powered and space-limited applications.
FAQ
What input voltage sources are compatible with STEVAL-ISA046V2?
The board accepts 2.7 V to 5.5 V DC input, making it compatible with single-cell Li-ion (3.0–4.2 V), Li-polymer, or dual-cell alkaline/NiMH batteries. It does not support unregulated wall adapters above 5.5 V or automotive 12 V supplies without external pre-regulation.
Can the output voltage be adjusted to 2.5 V or 5.0 V?
No - STEVAL-ISA046V2 is configured for fixed 3.3 V output via factory-set resistor divider. Adjusting output requires modifying R1/R2 feedback network per ST1S09I datasheet guidelines; no onboard jumpers or potentiometers are provided for voltage reconfiguration.
Is the ST1S09I IC on this board pin-compatible with other ST synchronous buck controllers?
No - the ST1S09I uses a proprietary DFN6 3x3 package with specific pin assignment (VIN, GND, SW, FB, EN, VOUT). It is not pin-compatible with ST1S10, ST1S12, or ST1S22, which differ in pin count, layout, and internal feature sets.
Does STEVAL-ISA046V2 include test points for measuring switching node or feedback voltage?
Yes - the board includes labeled test points TP1 (SW node), TP2 (FB pin), TP3 (VOUT), and TP4 (GND), enabling oscilloscope probing of switching waveform, feedback voltage accuracy, and output ripple without soldering or modification.
STEVAL-ISA046V2 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:
- 2A
- Regulator Topology:
- 2.7V ~ 5.5V
- Frequency - Switching:
- Buck
- Contents:
- 1.5MHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- ST1S09I
STEVAL-ISA046V2 FAQ
1.How can I place an order for STEVAL-ISA046V2 through Aetrix?
Please submit a Request for Quotation (RFQ) for STEVAL-ISA046V2 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-ISA046V2 reliable?
The price and inventory of STEVAL-ISA046V2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-ISA046V2 is usually 5 days.
3.What payment methods are accepted for STEVAL-ISA046V2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-ISA046V2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STEVAL-ISA046V2?
STEVAL-ISA046V2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STEVAL-ISA046V2 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-ISA046V2?
For technical support, including STEVAL-ISA046V2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-ISA046V2 requirements.
6.How does Aetrix verify that STEVAL-ISA046V2 is sourced from the original manufacturer or authorized distributors?
All STEVAL-ISA046V2 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-ISA046V2 meets industry standards.
7.What is the process for return or replacement of STEVAL-ISA046V2?
All STEVAL-ISA046V2 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-ISA046V2, 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-ISA046V2 part is unused and in its original packaging.
Return procedure for STEVAL-ISA046V2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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