STMicroelectronics L7987
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.| Part No. | L7987 |
|---|---|
| Datasheet | L7987 Download |
| Manufacturer |  STMicroelectronics |
| Description | 61V 3A asynchronous step-down switching regulator |
| Buy | Stock & Price |
FEATURES
● 3 A DC output current● 4.5 V to 61 V operating input voltage
● RDS,ON = 250 m typ.
● Adjustable fSW (250 kHz - 1.5 MHz)
● Low IQ-SHD (11 µA typ. from VIN)
● Low IQ (1 mA typ. - VIN 24 V - VOUT 3.3 V)
● Output voltage adjustable from 0.8 V to VIN
● Synchronization
● Adjustable soft-start time
● Adjustable current limitation
● Low dropout operation (12 µs max.)
● VBIAS improves efficiency at light load
● PGOOD open collector output
● Output voltage sequencing
● Digital frequency foldback in short-circuit
● Peak current foldback in short-circuit
● Auto-recovery thermal shutdown
DESCRIPTION
The embedded switchover feature on the VBIAS pin 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.
