STEVAL-ISA187V1

STEVAL-ISA187V1 is an evaluation board based on the ST synchronous step-down switching regulator A6985F, which can deliver up to 0.5 A and, with its 100% duty cycle ability to withstand cold crank events and wide input operating voltage range, represents the ideal choice for battery-powered automotive systems. Synchronous rectification helps achieve higher efficiency at full load as well as application compactness, while high-frequency switching (programmable up to 2MHz) helps reduce the cost and size of passive power components while remaining outside the AM band. The device can operate in low consumption mode (LCM), with a quiescent current of 30μA at VIN=12V and VOUT= 3.3V that ensures high efficiency under light load, which is a requirement in typical car body applications that are active when a car is parked. A low noise mode (LNM) can be selected to meet the requirements of infotainment applications with forced PWM mode under all load conditions.

• AECQ100 qualification
• 4 to 38V operating input voltage and 0.5A DC output current
• Programmable ISKIP current, 8μA IQ-SHTDWN and 30μA IQ at light load (LCM VIN = 12V and VOUT =3.3V)
• Adjustable fSW (250kHz - 2MHz) and output voltage adjustable from 0.85V to VIN
• Embedded output voltage supervisor
• Adjustable soft-start time and internal current limiting
• Overvoltage protection and thermal shutdown
• Output voltage sequencing
• Peak current mode architecture
• RDS(on)HS = 360mohm, RDS(on)LS = 150mohm