STMicroelectronics 2 A Synchronous Step-Down Switching Regulator Evaluation Board STEVAL-ISA205V1

STMicroelectronics STEVAL-ISA205V1 is a comprehensive evaluation board centered on the A6986H synchronous step-down switching regulator designed for automotive battery-powered applications. It supports delivering up to 2 A continuous current and withstands cold cranking across the entire duty cycle, ensuring reliability under challenging automotive conditions.

The synchronous rectification architecture enhances efficiency, particularly at full load, and allows for a compact application footprint. The device operates with a programmable switching frequency of up to 2 MHz, which aids in reducing the size and cost of passive components while avoiding interference within the AM radio band.

The regulator supports a Low Consumption Mode (LCM) that reduces quiescent current to as low as 30 microamperes at 12 V input and 3.3 V output, making it highly efficient under light load, typical of automotive body systems that remain active during parking. Additionally, a Low Noise Mode (LNM) is available to meet stricter noise requirements of infotainment systems by enforcing forced PWM operation.

The board is preconfigured with a default output voltage of 3.3 V, a 500 kHz switching frequency, a high-level ISKIP current, and disabled switchover function. Users can easily adjust these parameters to tailor the device’s performance to specific automotive applications and test different scenarios effectively.

This evaluation board is an ideal solution for engineers developing power management circuits in automotive and industrial systems requiring robust, efficient voltage regulation under variable conditions.

The A6986H device delivers up to 2 A and handles cold cranking across 100 percent duty cycle. Synchronous rectification enhances efficiency at full load and reduces component size. Programmable switching frequency up to 2 MHz enables reduced passive component costs and compact design.

Low Consumption Mode (LCM) achieves quiescent current as low as 30 μA at typical voltages. Low Noise Mode (LNM) supports forced PWM operation for infotainment system requirements. Output voltage default set to 3.3 V, 500 kHz switching frequency, and configurable by the user.

Designed for use in automotive body applications active during vehicle parking. Evaluation board allows flexible settings to evaluate various application scenarios. Applications include automotive power management, battery-operated systems, laboratory evaluation of Switching Regulators, and development of embedded automotive electronics.

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