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STMicroelectronics STEVAL-ISA205V1

Name: STEVAL-ISA205V1
Brand: STMicroelectronics
SKU: STEVAL-ISA205V1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STEVAL-ISA205V1

Manufacturer:: STMicroelectronics

Category:: DC/DC & AC/DC (Off-Line) SMPS Evaluation Boards

Package:

Datasheet:: STEVAL-ISA205V1.pdf

Description:: EVAL BOARD FOR A6986H

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,860

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Product details

Overview

STEVAL-ISA205V1 from STMicroelectronics is an evaluation board for the A6986H 38 V, 2 A synchronous step-down switching regulator, designed to validate automotive-grade DC/DC conversion in cold-cranking and battery-powered systems. It supports 4–38 V input, delivers adjustable 0.85–VIN output, operates in Low Consumption Mode (30 μA IQ at 12 V_IN/3.3 V_OUT), and features programmable 250 kHz–2 MHz f_SW, synchronization, and embedded voltage supervision.

For engineers reviewing the STEVAL-ISA205V1 datasheet, STEVAL-ISA205V1 pinout, STEVAL-ISA205V1 application, or STEVAL-ISA205V1 equivalent, this board enables rapid validation of A6986H performance in automotive body electronics, infotainment power rails, cold-crank robustness testing, and low-I_Q system-level power architecture design.

Technical Context

The board implements the A6986H IC in peak current mode control with internal high-side (R_DS(on) = 180 mΩ) and low-side (R_DS(on) = 150 mΩ) MOSFETs, enabling 100% duty cycle operation critical for automotive cold-crank scenarios. It supports dual operating modes-Low Consumption Mode (LCM) for <30 μA quiescent current at light load and Low Noise Mode (LNM) for forced PWM across all loads-to meet distinct EMI and efficiency requirements.

Synchronization capability spans the full 250 kHz–2 MHz switching frequency range, and the board includes configurable soft-start, ISKIP current selection, overvoltage protection, thermal shutdown, and an adjustable feedback divider network (R7/R8 = 75 kΩ/240 kΩ default for 3.3 V output).

Key Specifications

Parameter	Value and Actual Design Meaning
Base IC	A6986H: Automotive-qualified (AEC-Q100) synchronous buck regulator
Input Voltage Range	4 V to 38 V - supports full automotive battery range including cold crank (≤4.5 V) and load dump (≤38 V)
Max Output Current	2 A continuous - validated with 10 µH inductor (L1), 4.7 µF output capacitors (C10/C15), and thermal layout
Quiescent Current	30 µA in LCM (VIN = 12 V, VOUT = 3.3 V) - enables >90% efficiency at 1 mA load for always-on body modules
Switching Frequency	250 kHz to 2 MHz - programmable via resistor on FSW pin; 500 kHz default balances EMI and inductor size
Output Voltage Range	0.85 V to VIN - set by FB divider (R7/R8); default 3.3 V for MCU/ASIC core rail validation
Protection Features	Overvoltage lockout, thermal shutdown, internal current limiting - no external fault monitoring required

Availability

STEVAL-ISA205V1 is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power supplies, ADAS domain controller auxiliary rails, and battery management system pre-regulators requiring stable component supply and AEC-Q100-validated reference designs.

Supply support for STEVAL-ISA205V1 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, sensors, and automotive-grade analog devices.

The STEVAL-ISA205V1 belongs to ST's automotive evaluation board portfolio, developed specifically to accelerate qualification of A6986H-based power supplies in 12 V/24 V vehicle architectures with stringent low-I_Q, cold-crank, and EMI compliance requirements.

FAQ

What is the default output voltage and how is it configured?

The default output voltage is 3.3 V, set by the R7 (75 kΩ) and R8 (240 kΩ) resistor divider on the FB pin per the A6986H feedback equation V_OUT = 0.85 V × (1 + R8/R7). This configuration targets MCU and interface IC core rails. The resistors are 0805-size and socketed for easy replacement to adjust output voltage.

Does the board support synchronization to an external clock?

Yes - the SYNCH pin (U1 Pin 4) accepts an external clock signal from 250 kHz to 2 MHz, enabling deterministic switching alignment across multiple regulators in multi-rail systems. The board includes test point TP3 for direct probing and a 10 Ω series resistor (R11) for impedance matching.

How is Low Consumption Mode (LCM) enabled or disabled?

LCM is enabled by default via the SS/INH pin (U1 Pin 3) pulled high through R6 (1 MΩ). To disable LCM and force PWM operation, ground SS/INH using jumper J2 or external control. This toggles between discontinuous conduction mode (LCM) and continuous forced-PWM (LNM) for EMI-sensitive infotainment applications.

Can the board be used to evaluate cold-cranking performance?

Yes - the A6986H on this board supports true 100% duty cycle operation down to 4 V input, validated per ISO 16750-2 Pulse 4 (cold crank). Input filtering (C1/C13/C14, L3) and layout follow automotive EMC guidelines, and VIN_EMI test point (TP8) allows direct oscilloscope monitoring during low-VIN transients.

STEVAL-ISA205V1 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:: 4V ~ 38V

Frequency - Switching:: Buck

Contents:: 500kHz

Utilized IC / Part:: Board(s)

Power - Output:: A6986H

STEVAL-ISA205V1 FAQ

1.How can I place an order for STEVAL-ISA205V1 through Aetrix?

Please submit a Request for Quotation (RFQ) for STEVAL-ISA205V1 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-ISA205V1 reliable?

The price and inventory of STEVAL-ISA205V1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-ISA205V1 is usually 5 days.

3.What payment methods are accepted for STEVAL-ISA205V1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-ISA205V1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STEVAL-ISA205V1?

STEVAL-ISA205V1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STEVAL-ISA205V1 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-ISA205V1?

For technical support, including STEVAL-ISA205V1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-ISA205V1 requirements.

6.How does Aetrix verify that STEVAL-ISA205V1 is sourced from the original manufacturer or authorized distributors?

All STEVAL-ISA205V1 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-ISA205V1 meets industry standards.

7.What is the process for return or replacement of STEVAL-ISA205V1?

All STEVAL-ISA205V1 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-ISA205V1, 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-ISA205V1 part is unused and in its original packaging.

Return procedure for STEVAL-ISA205V1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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