L5988D データシートの表示（PDF） - STMicroelectronics

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L5988D

4A step-down switching regulator with synchronous rectification

STMicroelectronics 

L5988

1 Technical characteristics

Technical characteristics

The L5988D is a synchronous step down monolithic power switching regulator capable of

delivering up to 4A. The input voltage can range from 2.9V to 18V.

Thanks to the very short minimum ON time, the device is able to manage extremely low duty

cycles, allowing very low output voltages. Requiring a minimum set of external components, the

device includes an internal 400 KHz switching frequency oscillator that can be externally

adjusted up to 1MHz. The regulator can provide 100% duty-cycle. A multifunction pin allows to

enable-disable the sink mode current capability after soft-start, to enable-disable the latch

mode for the OVP and to set the UVLO threshold for the 3.3V BUS and 12V BUS. The current

limit can be externally adjusted to fit the application requirements. The current is sensed during

both the on-time and the off-time and so the protection is effective with both very low or very

high duty-cycle and/or with high switching frequency. The HTSSOP16 package with exposed

pad allows reducing the RthJA to 40°C/W

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