Datasheet Microchip MIC3385YHL-TR — Datenblatt

MIC3385
8MHz Inductorless Buck Regulator
with LDO Standby Mode General Description
The Micrel MIC3385 is a high-efficiency inductorless buck
В®
regulator that features a LOWQ LDO standby mode that
draws only 18ВµA of quiescent current. The MIC3385
requires no external inductor enabling an ultra-low noise,
small size, and high efficiency solution for portable power
applications.
In PWM mode, the MIC3385 operates with a constant
frequency 8MHz PWM control. Under light load conditions,
such as in system sleep or standby modes, the PWM
switching operation can be disabled to reduce switching
В®
losses. In this light load LOWQ mode, the LDO maintains
the output voltage and draws only 18ВµA of quiescent
current. The LDO mode of operation saves battery life
while not introducing spurious noise and high ripple as
experienced with pulse skipping or bursting mode
regulators.
The MIC3385 operates from 2.7V to 5.5V input and
features internal power MOSFETs that can supply up to …