STEVAL-ISA186V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Low consumption mode or low noise mode

STEVAL-ISA186V1
38 V, 0.5 A synchronous step-down switching regulator
evaluation board based on A6985F5V
Data brief
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
 45 μA IQ at light load (LCM VIN = 12 V)
 8 μA IQ-SHTDWN
 Adjustable f SW (250 kHz - 2 MHz)
 Fixed output voltage VOUT = 5 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
Description
The STEVAL-ISA186V1 is a product evaluation
board based on the A6985F5V ST synchronous
step-down switching regulator, 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 A6985F5V
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 45 μA, hence ensuring the
high efficiency under light load condition required
in typical car body applications that are active
when the 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. The default board
configuration is LCM active, 2 MHz switching
frequency, high ISKIP current and the switchover
feature enabled, but all of these settings can be
easily changed so the user can evaluate different
application scenarios.
January 2016
DocID028925 Rev 1
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