Description

The A6984 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 voltage ripple. The “low

noise mode” (LNM) makes the switching

frequency almost constant over the load current

range, serving low noise application

specifications such as car audio/sensors. The

PGOOD open collector output can implement

output voltage sequencing during the power-up

phase. The synchronous rectification, designed

for high efficiency at medium-heavy load, and the

high switching frequency capability make the size

of the application compact. Pulse-by-pulse

current sensing on the low-side power element

implements effective constant current protection.

The package lead finishing guarantees side

solderability, thus allowing visual inspection

during manufacturing.

Features

 AEC-Q100 qualified

 400 mA DC output current

 4.5 V to 36 V operating input voltage

 Synchronous rectification

 Low consumption mode or low noise mode

 100 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

Applications

 Car body and ADAS applications (LCM)

 Car audio and low noise applications (LNM)