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STMicroelectronics STEVAL-ISA187V1

Name: STEVAL-ISA187V1
Brand: STMicroelectronics
SKU: STEVAL-ISA187V1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STEVAL-ISA187V1

Manufacturer:: STMicroelectronics

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

Package:

Datasheet:: STEVAL-ISA187V1.pdf

Description:: EVAL BOARD FOR A6985F

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:3,684

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Product details

Overview

STEVAL-ISA187V1 from STMicroelectronics is an evaluation board for the A6985F 38 V, 0.5 A synchronous step-down switching regulator IC, designed for automotive battery-powered systems with cold-crank tolerance (100% duty cycle), 4–38 V input range, and dual operating modes (LCM/LNM). It delivers adjustable output from 0.85 V to VIN with 30 μA quiescent current in low-consumption mode at 12 V_IN/3.3 V_OUT.

For engineers reviewing the STEVAL-ISA187V1 datasheet, STEVAL-ISA187V1 pinout, STEVAL-ISA187V1 application, or STEVAL-ISA187V1 equivalent, this board enables rapid validation of A6985F-based power supply designs targeting automotive body electronics, infotainment subsystems, and start-stop compatible ECUs requiring robust input transients handling and EMI-controlled high-frequency operation up to 2 MHz.

Technical Context

The board implements the A6985F's peak current mode control architecture with internal high-side (R_DS(on) = 360 mΩ) and low-side (R_DS(on) = 150 mΩ) MOSFETs, supporting programmable switching frequency (250 kHz–2 MHz), adjustable soft-start, and embedded output voltage supervisor with sequencing capability.

It supports two distinct operational modes: Low Consumption Mode (LCM) for ultra-low I_Q (30 μA @ 12 V/3.3 V) in parked-car applications, and Low Noise Mode (LNM) enforcing forced PWM across all loads to meet infotainment EMI requirements-both selectable via onboard jumpers and resistors.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4 V to 38 V - supports full automotive battery range including cold-crank (≥38 V transient tolerance via 100% duty cycle)
Max Output Current	0.5 A - sufficient for microcontroller cores, CAN transceivers, and sensor interfaces in body control modules
Quiescent Current (LCM)	30 μA @ VIN=12 V, VOUT=3.3 V - enables >1-year battery standby in always-on vehicle modules
Switching Frequency	250 kHz to 2 MHz - allows optimization between efficiency (lower f_SW) and passive size/EMI (higher f_SW, outside AM band)
Output Voltage Range	0.85 V to VIN - supports 3.3 V, 5 V, and 12 V rail generation from single battery input
Protection Features	Overvoltage, thermal shutdown, internal current limiting, and output sequencing - ensures safe operation during load dump or short-circuit events

Availability

STEVAL-ISA187V1 is available at Aetrix Electronics and suitable for automotive body electronics development, infotainment power subsystem validation, and start-stop ECU design requiring stable component supply and pre-validated reference implementation.

Supply support for STEVAL-ISA187V1 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, delivering automotive-grade, industrial, and consumer ICs with emphasis on functional safety and reliability.

The STEVAL-ISA187V1 belongs to ST's automotive power evaluation platform family, engineered specifically to accelerate adoption of AEC-Q100 qualified DC-DC regulators in battery-supplied vehicle systems demanding cold-crank resilience and ultra-low standby power.

FAQ

What is the primary function of the STEVAL-ISA187V1 evaluation board?

The STEVAL-ISA187V1 is a fully assembled and tested evaluation platform for the A6985F synchronous buck regulator. Its purpose is to enable hardware validation, performance characterization (efficiency, transient response, EMI), and firmware integration of the A6985F in automotive 12 V battery-derived power supplies-without requiring custom PCB design or component sourcing.

Can the STEVAL-ISA187V1 be used outside automotive applications?

Yes-while optimized for AEC-Q100 compliance and cold-crank operation, its 4–38 V input range, 0.5 A output, and programmable 250 kHz–2 MHz switching make it suitable for industrial IoT sensors, railway auxiliary supplies, and off-grid battery systems where wide VIN and low I_Q are critical. No automotive-specific firmware or calibration is embedded.

How is switching frequency configured on this board?

Switching frequency is set by resistor R7 (200 kΩ default) connected to the FSW pin of U1 (A6985F), per the formula f_SW = 1/(R_FSW × 1.2 ns). The board includes test points (TP3 SYNCH) and jumper options to enable external clock synchronization or adjust R7 for frequencies from 250 kHz to 2 MHz-verified in the schematic and layout.

Does the board support output voltage sequencing?

Yes-the A6985F IC on the board integrates output voltage sequencing control via the SS/INH pin (TP1), allowing controlled ramp-up timing across multiple rails when cascaded with other compatible regulators. The board provides direct access to this pin and includes pull-up/pull-down resistors to configure startup delay and enable behavior per application needs.

STEVAL-ISA187V1 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:: 500mA

Regulator Topology:: 4V ~ 38V

Frequency - Switching:: Buck

Contents:: 2MHz

Utilized IC / Part:: Board(s)

Power - Output:: A6985F

STEVAL-ISA187V1 FAQ

1.How can I place an order for STEVAL-ISA187V1 through Aetrix?

Please submit a Request for Quotation (RFQ) for STEVAL-ISA187V1 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-ISA187V1 reliable?

The price and inventory of STEVAL-ISA187V1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-ISA187V1 is usually 5 days.

3.What payment methods are accepted for STEVAL-ISA187V1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-ISA187V1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STEVAL-ISA187V1?

STEVAL-ISA187V1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STEVAL-ISA187V1 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-ISA187V1?

For technical support, including STEVAL-ISA187V1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-ISA187V1 requirements.

6.How does Aetrix verify that STEVAL-ISA187V1 is sourced from the original manufacturer or authorized distributors?

All STEVAL-ISA187V1 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-ISA187V1 meets industry standards.

7.What is the process for return or replacement of STEVAL-ISA187V1?

All STEVAL-ISA187V1 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-ISA187V1, 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-ISA187V1 part is unused and in its original packaging.

Return procedure for STEVAL-ISA187V1:

1.Submit a request within 90 days.

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

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