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ManualsBrandsLINEAR TECHNOLOGY ManualsPMICsPMIC - voltage regulators - DC DC switch controllers QFN 38
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LT8705
12
8705fb
For more information www.linear.com/LT8705
CSPOUT (Pin 31/Pin 34): The (+) Input to the Output
Current Monitor Amplifier. This pin and the CSNOUT pin
measure the voltage across the sense resistor, R
SENSE2
,
to provide the output current signals. Connect this pin
to V
OUT
when not in use. See Applications Information
section for proper use of this pin.
CSNIN (Pin 32/Pin 36): The (–) Input to the Input Current
Monitor Amplifier. This pin and the CSPIN pin measure
the voltage across the sense resistor, R
SENSE1
, to provide
the input current signals. Connect this pin to V
IN
when not
in use. See Applications Information section for proper
use of this pin.
CSPIN (Pin 33/Pin 37): The (+) Input to the Input Cur
-
rent Monitor Amplifier. Connect this pin to V
IN
when not
in use. See Applications Information section for proper
use of this pin.
V
IN
(Pin 34/Pin 38): Main Input Supply Pin. It must be
locally bypassed to ground.
INTV
CC
(Pin 35/Pin 1): Internal 6.35V Regulator Output.
Must be connected to the GATEV
CC
pin. INTV
CC
is powered
from EXTV
CC
when the EXTV
CC
voltage is higher than
6.4V, otherwise INTV
CC
is powered from V
IN
. Bypass this
pin to ground with a minimum 4.7μF ceramic capacitor.
SWEN (Pin 36 QFN Only): Switch Enable Pin. Tie high
to enable switching. Ground to disable switching. Don’t
float this pin. This pin is internally tied to INTV
CC
in the
TSSOP package.
IMON_IN (Pin 38/Pin 3): Input Current Monitor Pin. The
current out of this pin is proportional to the input current.
See the Operation and Applications Information sections.
MODE (Pin 37/Pin 2): Mode Pin. The voltage applied to
this pin sets the operating mode of the controller. When
the applied voltage is less than 0.4V, the forced continu
-
ous current mode is active. When this pin is allowed to
f
l
oat, Burst Mode operation is active. When the MODE pin
voltage is higher than 2.3V, discontinuous mode is active.
GND (Pin 13, Exposed Pad Pin 39/Pin 16, Exposed Pad
Pin 39): Ground. Tie directly to local ground plane.
pin FuncTions
(QFN/TSSOP)