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STMicroelectronics STEVAL-ISA144V1
- Part No.:
- STEVAL-ISA144V1
- Manufacturer:
- STMicroelectronics
- Package:
- Datasheet:
-
STEVAL-ISA144V1.pdf
- Description:
- EVAL BOARD FOR L5983
- Quantity:
- Payment:
- Shipping:
Inventory:2,423
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Product details
Overview
STEVAL-ISA144V1 from STMicroelectronics is an evaluation board for the L5983 1.5 A step-down switching regulator IC, implementing a complete synchronous buck converter with adjustable 0.6–16 V output, 2.9–18 V input, and programmable 250 kHz–1 MHz switching frequency. It features internal soft-start, 100% duty-cycle low-dropout operation, zero-load current mode, and integrated overcurrent/thermal protection.
For engineers reviewing the STEVAL-ISA144V1 datasheet, STEVAL-ISA144V1 pinout, STEVAL-ISA144V1 application, or STEVAL-ISA144V1 equivalent, this board enables rapid validation of L5983-based power supply designs in industrial sensors, portable instrumentation, and FPGA core voltage regulation-where compact size, wide VIN range, and stable light-load efficiency are critical.
Technical Context
The board implements the L5983 DC-DC controller in VFQFPN8 (3 mm × 3 mm) package, using external Schottky diode rectification and MLCC-compatible compensation. Input capacitance and diode reverse voltage rating (25 V) fully cover the 2.9–18 V input range.
Output voltage is set via resistor divider (R1/R2), factory-configured for 3.3 V but adjustable down to 0.6 V. Switching frequency is fixed at 500 kHz by R5 on Fsw pin, within the device's 250 kHz–1 MHz programmable range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Base IC | L5983 step-down switching regulator with integrated control logic and gate drivers |
| Max Output Current | 1.5 A continuous DC load capability with thermal derating above 60°C ambient |
| Input Voltage Range | 2.9 V to 18 V - supports wide-input industrial and battery-powered systems |
| Output Voltage Range | 0.6 V to 16 V - adjustable via external resistor divider; 3.3 V default setting |
| Switching Frequency | 500 kHz (set by R5); programmable from 250 kHz to 1 MHz for EMI/noise trade-off tuning |
| Protection Features | Thermal shutdown and cycle-by-cycle overcurrent limiting - prevents damage during fault conditions |
| Soft-Start | Internal soft-start circuit - limits inrush current during power-up to avoid input rail sag |
Availability
STEVAL-ISA144V1 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable test equipment, and FPGA I/O voltage regulation requiring stable component supply, fast design iteration, and verified layout practices.
Supply support for STEVAL-ISA144V1 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, analog devices, and MEMS sensors for industrial, automotive, and consumer applications.
The STEVAL evaluation board series supports rapid prototyping of ST's power management ICs-including the L5983 buck regulator-targeting space-constrained, high-efficiency DC-DC conversion in embedded and portable systems.
FAQ
What is the default output voltage and how is it configured?
The STEVAL-ISA144V1 is factory-configured for 3.3 V output using resistor divider R1 (10 kΩ) and R2 (4.7 kΩ) connected to the FB pin. Output voltage can be adjusted from 0.6 V to 16 V by changing R1/R2 values per the L5983 feedback equation: VOUT = 0.6 V × (1 + R1/R2).
Does the board support synchronous rectification?
No - the STEVAL-ISA144V1 uses an external Schottky diode (D1, 1N5819 equivalent) for asynchronous rectification. The L5983 itself does not integrate a synchronous MOSFET driver; it relies on external diode conduction during the low-side switch off-time.
Can the switching frequency be changed, and how?
Yes - the board's switching frequency is set to 500 kHz by resistor R5 (24.9 kΩ) connected between Fsw pin and GND. To change frequency, replace R5 with a value from the L5983 datasheet's Fsw vs. RFSW table - e.g., 49.9 kΩ yields ~250 kHz, 12.4 kΩ yields ~1 MHz.
What output capacitor types are validated for stability?
The board's compensation network is designed for multilayer ceramic capacitors (MLCCs) as output filters. C2 (22 µF X5R, 16 V) and C6 (86 nF) form part of the Type II compensation network, ensuring loop stability with low-ESR MLCCs - electrolytic or polymer caps require re-tuning.
STEVAL-ISA144V1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Main Purpose:
- DC/DC, Step Down
- Outputs and Type:
- 1 Non-Isolated Output
- Voltage - Output:
- -
- Current - Output:
- 3.3V
- Voltage - Input:
- 1.5A
- Regulator Topology:
- 2.9V ~ 18V
- Frequency - Switching:
- Buck
- Contents:
- 250kHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- L5983
STEVAL-ISA144V1 FAQ
1.How can I place an order for STEVAL-ISA144V1 through Aetrix?
Please submit a Request for Quotation (RFQ) for STEVAL-ISA144V1 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-ISA144V1 reliable?
The price and inventory of STEVAL-ISA144V1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-ISA144V1 is usually 5 days.
3.What payment methods are accepted for STEVAL-ISA144V1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-ISA144V1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STEVAL-ISA144V1?
STEVAL-ISA144V1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STEVAL-ISA144V1 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-ISA144V1?
For technical support, including STEVAL-ISA144V1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-ISA144V1 requirements.
6.How does Aetrix verify that STEVAL-ISA144V1 is sourced from the original manufacturer or authorized distributors?
All STEVAL-ISA144V1 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-ISA144V1 meets industry standards.
7.What is the process for return or replacement of STEVAL-ISA144V1?
All STEVAL-ISA144V1 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-ISA144V1, 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-ISA144V1 part is unused and in its original packaging.
Return procedure for STEVAL-ISA144V1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STEVAL-ISA144V1 Tags
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DFR0571
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DFR0379
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DFR0205
DFRobot
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1385
Adafruit Industries LLC
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2465
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DC2468A
Analog Devices Inc.
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DC2841A
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TPS552892EVM-111
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TPS55289EVM-093
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EPC9158
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