STEVAL-ISA082V1
3 A peak 800 kHz fixed-frequency PWM synchronous step-down
evaluation board with enable on/off based on the ST1S40IPHR
Data brief
Description
The STEVAL-ISA082V1, based on the
ST1S40IPHR, is an internally compensated 800
kHz fixed-frequency PWM synchronous
stepdown converter evaluation board.
The ST1S40 operates from 4.0 V to 18.0 V input,
while it regulates an output voltage as low as 0.8
V and up to VIN (100% duty cycle).
The ST1S40 integrates a 95 mΩ high-side switch
and a 69 mΩ synchronous rectifier allowing very
high efficiency with very low output voltage.
The peak current mode control with internal
compensation delivers a very compact solution
with a minimum component count.
Features
Input voltage Vin = 4 V to 18 V
Output voltage Vout = 3.3 V
Maximum output current: 3 A
Switching frequency: 800 kHz
Short-circuit protected
RoHS compliant
The ST1S40 is protected through cycle-by-cycle
current limiting in case of overload and is also
protected by a current foldback function with
frequency reduction in case of short-circuit.
The device is available with an enable on/off
function.
October 2015
DocID022276 Rev 2
1/4
www.st.com
For further information contact your local STMicroelectronics sales
office
STEVAL-ISA082V1
IMPORTANT NOTICE – PLEASE READ CAREFULLY
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and
improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST
products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order
acknowledgement.
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the
design of Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.
ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2015 STMicroelectronics – All rights reserved
4/4
DocID022276 Rev 2
京公网安备 11010802033920号
EEWORLD
