The L7987 device is a step-down monolithic switching regulator able to deliver up to 3 A DC. The output voltage adjustability ranges from 0.8 V to VIN. The wide input voltage range and the 100% duty cycle capability meet the fail safe specifications for industrial systems. The embedded switchover feature on the VBIASpin maximizes the efficiency at light load. The adjustable current limitation, designed to select the inductor RMS current accordingly with the nominal output current, and the high switching frequency capability make the size of the application compact. Pulse-by-pulse current sensing with digital frequency foldback implements an effective constant current protection over the different application conditions. The peak current foldback decreases the stress of the power components in heavy short-circuit condition. The PGOOD open collector output can also implement output voltage sequencing during the power-up phase. Multiple devices can be synchronized sharing the SYNCH pin to prevent beating noise in low noise applications like sensors with A/D conversion.
|DS10053: 61 V 3 A asynchronous step-down switching regulator with adjustable current limitation||3.0||2.34 MB|
|L7987 Pspice model||1.0||241.29 KB|
|DC-DC converters||557.92 KB|
|Brochure Power management guide||10.2018||4.42 MB|
|Electric vehicle (EV) ecosystem||1.1||1.28 MB|
|Switching Converters (DC-DC) – Quick Reference Guide||1.0||481.92 KB|
|STEVAL-ISA152V1||3.3 V/3 A high efficiency step down DC-DC converter (VIN= 4.5 to 60 V) based on the L7987|
|Part Number||Package||Packing Type||Marketing Status||Unit Price (US$) *||Quantity||ECCN (US)||Country of Origin||More info||Order from ST||Order from Distributors|
|L7987TR||HTSSOP16||Tape And Reel||Active : Product is in volume production||1.25||1000||EAR99||-||MORE INFO||Buy Direct Add to cart||DISTRIBUTOR AVAILABILITY|
|L7987||HTSSOP16||Tube||Active : Product is in volume production||1.25||1000||EAR99||-||MORE INFO||Buy Direct Add to cart||DISTRIBUTOR AVAILABILITY|
|Part Number||Marketing Status||Package||Grade||RoHS Compliance Grade||Material Declaration**|
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.