STMicroelectronics – L7987 & L7987L – New high-performance switching regulators
The new L7987 (3A) and L7987L (2A) are monolithic buck switching regulators that deliver up to 3 A and 2 A respectively with an input voltage up to 61 V. Able to work with a 100% duty cycle, they help meet fail-safe requirements for industrial systems including PLCs. In addition, pulse-by-pulse current sensing with digital frequency foldback provides excellent protection in a wide range of load conditions. These regulators feature a switching frequency that can go as high as 1.5 MHz. Their adjustable current limitation helps minimize inductor size, thus reducing application cost and size and improving efficiency.
Features:
– Wide input operating voltage (VIN) from 4.5 V to 61 V and 0.8 V to VIN adjustable output voltage to fit a wide variety of application requirements
– Adjustable switching frequency from 250 kHz to 1.5 MHz and Low shut down (11 µA typ) and operating (1 mA typ ) quiescent current for high efficiency
– Adjustable current limitation and Peak current digital frequency fold-back in short-circuit help reduce strain on the power components
– Output voltage sequencing and synchronization improve noise reduction when using multiple ICs
Datasheet L7987L
Dataheet L7987
