STEVAL-ISA190V1 Datasheet, PDF (1/5 Pages) STMicroelectronics – Low consumption mode or low noise mode

STEVAL-ISA190V1
38 V, 1.5 A synchronous step-down switching regulator
evaluation board based on A6986F
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
 30 µA IQ at light load (LCM VIN = 12 V and
VOUT = 3.3 V)
 8 μA IQ-SHTDWN
 Adjustable fSW (250 kHz - 2 MHz)
 Output voltage adjustable from 0.85 V to VIN
 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-ISA190V1 is a product evaluation
board based on ST's synchronous step-down
switching regulator A6986F.
The device is capable of delivering up to 1.5 A
and its 100% duty cycle capability to withstand
the cold crank event along with its wide input
operating voltage range make A6986F the ideal
choice for battery powered automotive systems.
Synchronous rectification improves efficiency at
full load as well as application compactness,
while high-frequency switching (programmable
up to 2 MHz) lowers power passive costs and
size while remaining outside of the AM band.
The device can operate in low consumption
mode (LCM) with quiescent current as low as 30
µA at VIN = 12 V and VOUT = 3.3 V, hence
assuring high efficiency at light loads, as required
in typical car body applications that remain active
while the car is parked. A low noise mode (LNM)
can alternatively be selected to meet the forced
PWM mode requirement under all loading
conditions for infotainment applications.
The default evaluation board settings are 6 V
output voltage configured in LCM, 500 kHz
switching frequency, high level ISKIP current and
the switchover feature disabled. These
configurations can easily be changed by the user
to evaluate different application scenarios.
May 2016
DocID029293 Rev 1
For further information contact your local STMicroelectronics sales
office
1/5
www.st.com