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STMicroelectronics STEVAL-ISA186V1
- Part No.:
- STEVAL-ISA186V1
- Manufacturer:
- STMicroelectronics
- Package:
- Datasheet:
-
STEVAL-ISA186V1.pdf
- Description:
- EVAL BOARD FOR A6985F5V
- Quantity:
- Payment:
- Shipping:
Inventory:1,271
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Product details
Overview
STEVAL-ISA186V1 from STMicroelectronics is an evaluation board for the A6985F5V 38 V, 0.5 A synchronous step-down switching regulator IC, designed for automotive battery-powered systems. It supports 4–38 V input, delivers fixed 5 V output, operates in low-consumption mode (45 μA IQ at 12 V), and features programmable 250 kHz–2 MHz switching frequency, embedded voltage supervisor, and cold-crank tolerance via 100% duty cycle capability.
For engineers reviewing the STEVAL-ISA186V1 datasheet, STEVAL-ISA186V1 schematic, STEVAL-ISA186V1 application notes, or STEVAL-ISA186V1 board layout, this page provides verified functional context, key configuration options (LCM/LNM modes, soft-start, synchronization), and design-ready implementation details for automotive body electronics and infotainment power supply validation.
Technical Context
The board implements the A6985F5V IC in peak current mode control architecture with internal high-side (RDS(on) = 360 mΩ) and low-side (RDS(on) = 150 mΩ) MOSFETs, enabling synchronous rectification and high efficiency across load range. It supports dual operating modes: low-consumption mode (LCM) for parked-car applications and low-noise mode (LNM) with forced PWM for EMI-sensitive infotainment systems.
Key configurable features include adjustable ISKIP current, programmable soft-start time, output voltage sequencing, overvoltage protection, thermal shutdown, and external synchronization via SYNCH pin. The default configuration uses LCM, 2 MHz fSW, high ISKIP, and switchover enabled - all user-modifiable via solder jumpers and resistor networks per schematic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 38 V - supports automotive battery transients including cold crank (up to 38 V) and start-stop operation. |
| Output Voltage | Fixed 5 V - regulated output suitable for MCU, sensor, and interface IC power rails in automotive ECUs. |
| Max Output Current | 0.5 A - sufficient for low-power body control modules, door modules, and telematics subsystems. |
| Quiescent Current (LCM) | 45 μA at VIN = 12 V - enables ultra-low standby power for always-on vehicle systems. |
| Shutdown Current | 8 μA - minimizes battery drain during vehicle sleep mode. |
| Switching Frequency | 250 kHz to 2 MHz - allows optimization of inductor size, EMI filtering, and AM-band avoidance (≥2 MHz). |
| Protection Features | Overvoltage, thermal shutdown, internal current limiting - ensures robust operation under fault conditions without external circuitry. |
Availability
STEVAL-ISA186V1 is available at Aetrix Electronics and suitable for automotive body electronics validation, infotainment power supply development, and low-power ECU prototyping requiring stable component supply and AEC-Q100-compliant reference designs.
Supply support for STEVAL-ISA186V1 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, Switzerland, specializing in automotive, industrial, and power management solutions with broad IP portfolio and AEC-Q100 qualified product lines.
The STEVAL-ISA186V1 belongs to ST's automotive evaluation board family, developed specifically to accelerate qualification and integration of A6985F5V DC-DC regulators into battery-supplied vehicle systems demanding high reliability and transient resilience.
FAQ
What is the primary function of the STEVAL-ISA186V1 board?
The STEVAL-ISA186V1 is a fully assembled and tested evaluation platform for the A6985F5V synchronous buck regulator. Its purpose is to enable rapid validation of the IC's performance-including efficiency, transient response, mode switching (LCM/LNM), and protection behavior-in real automotive power supply scenarios, using pre-validated layout and component selection.
Can the output voltage be adjusted on this board?
No, the STEVAL-ISA186V1 is configured for fixed 5 V output as set by the A6985F5V's internal feedback network. The IC variant used (A6985F5V) has factory-trimmed 5 V regulation; no external resistor divider is populated, and the FB pin is internally tied to achieve this fixed output.
How is synchronization implemented on the STEVAL-ISA186V1?
Synchronization is supported via the SYNCH pin (U1 Pin 4), accessible at test point TP3. The board accepts an external clock signal (250 kHz–2 MHz) to align switching frequency with system timing requirements, reducing beat frequencies and improving EMI predictability in multi-rail automotive systems.
Does the board support cold-crank testing?
Yes - the underlying A6985F5V IC supports 100% duty cycle operation and withstands up to 38 V input, enabling direct validation under cold-crank conditions (e.g., ISO 16750-2 Pulse 4). The board's input filtering (C1, C9, C14) and layout are designed to maintain stability during such transients.
STEVAL-ISA186V1 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:
- 5V
- Voltage - Input:
- 500mA
- Regulator Topology:
- 4V ~ 38V
- Frequency - Switching:
- Buck
- Contents:
- 2MHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- A6985F5V
STEVAL-ISA186V1 FAQ
1.How can I place an order for STEVAL-ISA186V1 through Aetrix?
Please submit a Request for Quotation (RFQ) for STEVAL-ISA186V1 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-ISA186V1 reliable?
The price and inventory of STEVAL-ISA186V1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-ISA186V1 is usually 5 days.
3.What payment methods are accepted for STEVAL-ISA186V1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-ISA186V1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STEVAL-ISA186V1?
STEVAL-ISA186V1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STEVAL-ISA186V1 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-ISA186V1?
For technical support, including STEVAL-ISA186V1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-ISA186V1 requirements.
6.How does Aetrix verify that STEVAL-ISA186V1 is sourced from the original manufacturer or authorized distributors?
All STEVAL-ISA186V1 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-ISA186V1 meets industry standards.
7.What is the process for return or replacement of STEVAL-ISA186V1?
All STEVAL-ISA186V1 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-ISA186V1, 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-ISA186V1 part is unused and in its original packaging.
Return procedure for STEVAL-ISA186V1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STEVAL-ISA186V1 Tags
-
DFR0571
DFRobot
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DFR0379
DFRobot
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DFR0205
DFRobot
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1385
Adafruit Industries LLC
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COM-15208
SparkFun Electronics
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1944
Adafruit Industries LLC
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2465
Adafruit Industries LLC
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DC2468A
Analog Devices Inc.
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DC2841A
Analog Devices Inc.
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TPS552892EVM-111
Texas Instruments
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TPS55289EVM-093
Texas Instruments
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EPC9158
EPC
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