LTM4614(RevA) Просмотр технического описания (PDF) - Linear Technology
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LTM4614 Datasheet PDF : 20 Pages
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LTM4614
PIN FUNCTIONS
VIN1, VIN2 (J1-J6, K1-K6); (C1-C6, D1-D6): Power Input
Pins. Apply input voltage between these pins and GND
pins. Recommend placing input decoupling capacitance
directly between VIN pins and GND pins.
VOUT1, VOUT2 (K9-K12, J9-J12, L9-L12, M9-M12); (C9-C12,
D9-D12, E9-E12, F9-F12): Power Output Pins. Apply out-
put load between these pins and GND pins. Recommend
placing output decoupling capacitance directly between
these pins and GND pins. Review Table 4.
GND1, GND2, (G1-G12, H1, H7-H12, J7-J8, K7-K8, L1,
L7-L8, M1-M8); (A1-A12, B1, B7-B12, C7-C8, D7-D8,
E1, E7-E8, F1-F8): Power Ground Pins for Both Input
and Output Returns.
TRACK1, TRACK2 (L3, E3): Output Voltage Tracking Pins.
When the module is configured as a master output, then a
soft-start capacitor is placed on the RUN/SS pin to ground
to control the master ramp rate, or an external ramp can
be applied to the master regulator’s track pin to control it.
Slave operation is performed by putting a resistor divider
from the master output to the ground, and connecting the
center point of the divider to this pin on the slave regulator.
If tracking is not desired, then connect the TRACK pin to
VIN. Load current must be present for tracking. See Ap-
plications Information section.
FB1, FB2 (L6, E6): The Negative Input of the Switching
Regulators’ Error Amplifier. Internally, these pins are con-
nected to VOUT with a 4.99k precision resistor. Different
output voltages can be programmed with an additional
resistor between the FB and GND pins. Two power modules
can current share when this pin is connected in parallel
with the adjacent module’s FB pin. See Applications In-
formation section.
COMP1, COMP2 (L5, E5): Current Control Threshold
and Error Amplifier Compensation Point. The current
comparator threshold increases with this control voltage.
Two power modules can current share when this pin is
connected in parallel with the adjacent module’s COMP
pin. Each channel has been internally compensated. See
Applications Information section.
PGOOD1, PGOOD2 (L4, E4): Output Voltage Power
Good Indicator. Open-drain logic output that is pulled to
ground when the output voltage is not within ±7.5% of
the regulation point.
RUN/SS1, RUN/SS2 (L2, E2): Run Control and Soft-Start
Pin. A voltage above 0.8V will turn on the module, and below
0.5V will turn off the module. This pin has a 1M resistor
to VIN and a 1000pF capacitor to GND. See Applications
Information section for soft-start information.
SW1, SW2 (H2-H6, B2-B6): The switching node of the
circuit is used for testing purposes. This can be connected to
copper on the board for improved thermal performance.
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