ST Life.augmented






L7987L and L7987 buck regulators

New 2A (L7987L) and 3A (L7987) switching regulators designed to meet stringent fail safe requirements of industrial 24VDC systems like programmable logic controllers (PLC):

-  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

An easy-to-use evaluation board (STEVAL-ISA152V1) based on the L7987 regulator is available to help you configure and evaluate application parameters so you can reach higher efficiency, higher power density and lower standby power designs.

New high-efficiency AEC-Q100-qualified step-down switching regulators

The range of AEC-Q100-qualified products available at ST is constantly growing to provide our customers with optimized, scalable solutions for a large variety of current and voltage requirements as well as the power distribution architecture in dashboards and in-vehicle multimedia applications.

ST’s A6985F and A6986F are step-down converters with synchronous rectifications that provide respectively 1.5 A and 0.5 A output current with an adjustable output voltage. They can work in either Low Consumption mode (with output ripple control) to help minimize consumption when the car is parked or Low Noise mode (with constant frequency) to ensure the lowest level of interference with noise-sensitive systems such as car multimedia.

  • Wide 4 to 38 V input voltage (VIN) for cold crank and load dump compatibility
  • 30 μA consumption at light-load in Low Consumption mode and 8 μA at shut-down
  • Fixed (3.3 and 5 V) or adjustable (from 0.85 V to VIN) output voltage
  • Adjustable switching frequency from 250 kHz to 2 MHz for design flexibility
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