L6984 - STMicroelectronics

L6984 synchronous step-down switching regulator

The L6984 is a step-down monolithic switching regulator able to deliver up to 400 mA DC. The output voltage adjustability ranges from 0.9 V. The fixed 3.3 V VOUT requires no external resistor divider. The “Low Consumption Mode” (LCM) is designed for applications active during car parking, so it maximizes the efficiency at light load with controlled output vo.

Features

 400 mA DC output current
 4.5 V to 36 V operating input voltage
 Synchronous rectification
 Low consumption mode or low noise mode
 75 µA IQ at light load (LCM VOUT = 3.3 V)
 13 µA IQ-SHTDWN
 Adjustable fSW (250 kHz - 600 kHz)
 Output voltage adjustable from 0.9 V
 No resistor divider required for 3.3 V VOUT
 VBIAS maximizes efficiency at light load
 350 mA valley current limit
 Constant on-time control scheme
 PGOOD open collector
 Thermal shutdown Description The L6984 is a step-down monolithic switching regulator able to deliver up to 400 mA DC. The output voltage adjustabil.