IC-DC_17 Datasheet, PDF (2/19 Pages) IC-Haus GmbH – 2-CHANNEL BUCK/BOOST DC/DC CONVERTER

iC-DC
2-CHANNEL BUCK/BOOST DC/DC CONVERTER
Rev B1, Page 2/19
DESCRIPTION
iC-DC is a monolithic switching converter with two
back-end linear regulators. The output voltages of
the two linear regulators can be individually pin-con-
figured within a range of 1.5 to 5.5 V. The switching
converter supplies up to 300 mA which can be drawn
from the two linear regulators in the ratio required.
The intermediate voltages of the two on-chip linear
regulators are adjusted to minimize their drop-out volt-
ages. These are approximately 400 mV above the set
linear regulator output voltages.
The high efficiency of the buck/boost converter for an
input voltage range of +4 V to +36 V makes iC-DC
suitable for industrial applications. Using very few
external components, a DC/DC power pack can be
created with a stabilized supply voltage and minimum
power dissipation.
iC-DC is ideal for sensor applications thanks to its
minimal power loss, few components, and stabilized
supply. Switching transistors, flyback diodes, and
an oscillator are integrated in the device so that the
only external elements needed are an inductor, the
back-up capacitors, and a reference resistor.
The back-end linear regulators have a very low resid-
ual ripple with comparatively small filter capacitors in
the single-digit µF range.
By using two independent regulators voltages can be
decoupled from sensitive analog circuits and driver
devices, for example.
The chip temperature, input voltage, and integrated re-
verse polarity protection are monitored and errors sig-
naled by current-limited open-collector outputs. With
overtemperature the switching converter is disabled
to reduce the chip’s power dissipation.
The linear regulator output voltages are monitored
and once having reached the steady state they are
also switched to outputs POE1 and POE2. The output
voltages of the two linear regulators VCC1 and VCC2
can be switched on and off by two separate inputs.
The device’s standby function can be activated to
minimize the current consumption.