STEVAL-ISA201V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Zero-load current operation

STEVAL-ISA201V1
3 A step-down switching regulator evaluation board based on the
L5987
Data brief
Features
 1.8 V, up to 3 A DC output current
 2.9 V to 18 V input voltage
 Output voltage adjustable from 0.6 V to VIN
 430 kHz switching frequency, programmable
in the range 250 kHz – 1 MHz
 Internal soft-start and inhibit
 Low dropout operation: 100% duty cycle
 Zero-load current operation
 Overcurrent and thermal protection
 VFQFPN8 (3 x 3 mm) package
 RoHS compliant
Description
The STEVAL-ISA201V1 product evaluation board
provides design engineers with a fully functional
step-down switching regulator with an output
current of up to 3 A. The STEVAL-ISA201V1
integrates the STMicroelectronics L5987 step-
down switching regulator together with all the
external components required for a typical
application. The rated voltage of the input
capacitor and the Schottky diode rectifier
repetitive peak reverse voltage are both 25 V,
rendering the board capable of covering the
entire 2.9 V - 18 V input voltage range of the
L5987 device.
The board features an external resistor divider
(R1 and R2) designed for an output voltage of 1.8
V. The output voltage can be set to a level from
0.6 V up to VIN. The compensation network on
the evaluation board allows the use of an MLCC
as output filter to keep the loop stable. The
switching frequency on the board is set to 430
kHz by means of the R5 resistor connected to pin
FSW.
March 2017
DocID030410 Rev 1
For further information contact your local STMicroelectronics sales
office
1/4
www.st.com