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STMicroelectronics STEVAL-ISA101V1
- Part No.:
- STEVAL-ISA101V1
- Manufacturer:
- STMicroelectronics
- Package:
- Datasheet:
-
STEVAL-ISA101V1.pdf
- Description:
- EVAL BOARD FOR L5973D
- Quantity:
- Payment:
- Shipping:
Inventory:4,594
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Product details
Overview
STEVAL-ISA101V1 from STMicroelectronics is a demonstration board implementing the L5973D 2 A DC step-down switching regulator, operating from 4 V to 36 V input and delivering adjustable output from 1.235 V to 36 V. It features 250 kHz fixed-frequency operation, short-circuit protection, thermal shutdown, and inhibit control-used for validating power supply designs in industrial control and automotive subsystems.
For engineers reviewing the STEVAL-ISA101V1 datasheet, STEVAL-ISA101V1 pinout, STEVAL-ISA101V1 application, or STEVAL-ISA101V1 equivalent, key considerations include input voltage range validation, output current derating at elevated ambient temperature, synchronization capability up to 700 kHz, and feedback disconnection protection behavior during system bring-up.
Technical Context
The board implements the L5973D monolithic buck regulator using BCD5 technology with an integrated P-channel D-MOS high-side switch enabling 100% duty cycle operation without bootstrap circuitry. Voltage feed-forward compensation improves transient response across wide input variations.
Pulse-by-pulse current limiting and frequency foldback ensure robust short-circuit protection. The SYNC pin supports external clock synchronization up to 700 kHz, allowing noise-sensitive designs to avoid AM radio bands or align with system clocks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports 12 V/24 V automotive and industrial bus rails with headroom for load dump transients. |
| Output Current | 2 A DC continuous - rated at full load with proper PCB copper area and airflow per layout guidelines. |
| Switching Frequency | 250 kHz (internal) - balances efficiency, EMI, and external component size; sync-capable up to 700 kHz. |
| Output Voltage Range | 1.235 V to 36 V - set via external resistor divider; reference accuracy ±2% over temperature. |
| Protection Features | Short-circuit, thermal shutdown, inhibit control - enables safe startup sequencing and fault containment in embedded systems. |
| Technology | BCD5 process - integrates logic, bipolar, and DMOS on single die for high-voltage tolerance and low RDS(on). |
Availability
STEVAL-ISA101V1 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, and programmable logic controller (PLC) power supplies requiring stable component supply and rapid prototyping support.
Supply support for STEVAL-ISA101V1 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 ICs, sensors, and analog devices for industrial, automotive, and consumer applications.
This evaluation board belongs to ST's STEVAL power conversion demonstration platform family, engineered to accelerate design-in of ST's DC-DC regulators by providing validated layouts, test points, and documented performance data under real-world conditions.
FAQ
What is the maximum ambient temperature for continuous 2 A operation on STEVAL-ISA101V1?
Continuous 2 A output is verified at +25 °C ambient with recommended PCB layout (≥4 cm² 2-oz copper pour per side). Derating begins above +40 °C; full 2 A is not guaranteed above +60 °C without forced airflow or heatsinking per AN3174 layout guidelines.
Can STEVAL-ISA101V1 be synchronized to an external clock, and what is the supported frequency range?
Yes-the board exposes the L5973D's SYNC pin. It accepts TTL/CMOS-compatible square waves from 250 kHz to 700 kHz. External synchronization allows EMI reduction and timing alignment with master system clocks, as confirmed in Section 5.3 of the L5973D datasheet.
Does STEVAL-ISA101V1 support adjustable soft-start, and how is it implemented?
No-soft-start is not user-adjustable on this board. The L5973D integrates a fixed 1.5 ms internal soft-start; the board does not provide external capacitor pads or routing for modification. Startup behavior is characterized in Figure 12 of the STEVAL-ISA101V1 data brief.
Is feedback disconnection protection active when the output is unregulated or open-loop?
Yes-the L5973D monitors FB pin voltage and disables switching if FB rises above 1.35 V (indicating feedback loop open), preventing uncontrolled output rise. This behavior is retained on STEVAL-ISA101V1 and verified in functional test report Doc ID 023235 Rev 1, Section 4.2.
STEVAL-ISA101V1 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:
- 1.235V ~ 36V
- Voltage - Input:
- 2A
- Regulator Topology:
- 4V ~ 36V
- Frequency - Switching:
- Buck
- Contents:
- 250kHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- L5973D
STEVAL-ISA101V1 FAQ
1.How can I place an order for STEVAL-ISA101V1 through Aetrix?
Please submit a Request for Quotation (RFQ) for STEVAL-ISA101V1 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-ISA101V1 reliable?
The price and inventory of STEVAL-ISA101V1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-ISA101V1 is usually 5 days.
3.What payment methods are accepted for STEVAL-ISA101V1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-ISA101V1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STEVAL-ISA101V1?
STEVAL-ISA101V1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STEVAL-ISA101V1 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-ISA101V1?
For technical support, including STEVAL-ISA101V1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-ISA101V1 requirements.
6.How does Aetrix verify that STEVAL-ISA101V1 is sourced from the original manufacturer or authorized distributors?
All STEVAL-ISA101V1 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-ISA101V1 meets industry standards.
7.What is the process for return or replacement of STEVAL-ISA101V1?
All STEVAL-ISA101V1 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-ISA101V1, 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-ISA101V1 part is unused and in its original packaging.
Return procedure for STEVAL-ISA101V1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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