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STEVAL-ISA185V1：38 V, 0.5 A synchronous step-down switching regulator evaluation board based on A6985F3V3

The STEVAL-ISA185V1 is a product evaluation board based on the ST synchronous step-down switching regulator A6985F3V3, 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, renders the A6985F3V3 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 2 MHz) helps to reduce the cost and size of power passive components while remaining outside the AM band.

The device can operate in low consumption mode (LCM) with a quiescent current of 30 µA, hence ensuring the high efficiency under light load condition required in typical car body applications that are active during car parking. A low noise mode (LNM) can be selected to meet the requirements of infotainment applications with forced PWM mode under all load conditions.

The default board configuration is LCM active, 2 MHz switching frequency, high I_SKIP current and the switchover feature enabled, but all of these settings can be easily changed so the user can evaluate different application scenarios.

Key Features

• AECQ100 qualification
• 0.5 A DC output current
• 4 V to 38 V operating input voltage
• Low consumption mode or low noise mode
• Programmable ISKIP current
• 30 μA IQ at light load (LCM VIN = 12 V)
• 8 μA IQ -SHTDWN
• Adjustable f SW (250 kHz - 2 MHz)
• Fixed output voltage VOUT = 3.3 V
• Embedded output voltage supervisor
• Synchronization
• Adjustable soft-start time
• Internal current limiting
• Overvoltage protection
• Output voltage sequencing
• Peak current mode architecture
• RDS(on)HS = 360 mΩ ; RDS(on)LS = 150 mΩ
• Thermal shutdown
• RoHS compliant

产品规格

Board Manufacturing Specifications

Bill of Materials

Schematic Packs

许可协议

样片和购买

质量和可靠性