Datasheet Linear Technology LT8603

LT8603
42V, Low IQ, Quad Output Triple Monolithic
Buck Converter and Boost Controller
FEATURES DESCRIPTION Flexible Power Supply System Capable of Four
Regulated Outputs with VBATT 3.1V for INTVCC or > 4.6V
for INTVCC4 the internal regulators will draw their power
from BIAS. This will reduce the on-chip power dissipation
during full frequency operation and reduce the effective
no-load sleep current at the input.
PG4 (Pin 11): Power Good Indicator Channel 4. This pin
is an open-drain output that pulls low until the Channel
4 feedback voltage is greater than 92% of its reference
voltage.
FSEL4A, FSEL4B (Pins 12, 17): Boost Converter
Frequency Select and RUN Control. These pins are logic
inputs. When both pins are low, the boost controller is
shut down. The boost controller switching frequency is
controlled using these pins according to Table 2 in the
Applications Information section.
GATE4 (Pin 15): External MOSFET Gate Drive Output.
This pin switches from GND to VINTVCC4 to turn on the
low side power MOSFET in the BOOST converter. See 12 the Applications Information section for information on
MOSFET selection. …