STEVAL-ISA189V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Low consumption mode or low noise mode

STEVAL-ISA189V1
38 V, 1.5 A synchronous step-down switching regulator
evaluation board based on A6986F5V
Data brief
Features
 AECQ100 qualification
 1.5 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 = 180 mΩ; RDS(on)LS = 150 mΩ
 Thermal shutdown
 RoHS compliant
Description
The STEVAL-ISA189V1 is a product evaluation
board based on the ST synchronous step-down
switching regulator A6986F5V, which can deliver
up to 1.5 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 2 MHz) helps 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 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. The default board
configuration is LCM active, 500 kHz 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.
February 2016
DocID028957 Rev 1
For further information contact your local STMicroelectronics sales
office
1/4
www.st.com