基于A6985F3V3的38 V，0.5 A同步降压型开关稳压器评估板,STEVAL-ISA185V1——

基于A6985F3V3的38 V，0.5 A同步降压型开关稳压器评估板

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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.

主要特性

AECQ100 qualification
0.5 A DC output current
4 V to 38 V operating input voltage
Low consumption mode or low noise mode
Programmable I_SKIP current
30 μA I_Q at light load (LCM V_IN = 12 V)
8 μA I_Q_-SHTDWN
Adjustable f _SW (250 kHz - 2 MHz)
Fixed output voltage V_OUT = 3.3 V
Embedded output voltage supervisor

Synchronization
Adjustable soft-start time
Internal current limiting
Overvoltage protection
Output voltage sequencing
Peak current mode architecture
R_DS(on)HS = 360 mΩ ; R_DS(on)LS = 150 mΩ
Thermal shutdown
RoHS compliant

参考设计下载