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LTM4604
PIN FUNCTIONS
V IN (B1, C1, C3-C7, D7, E6 and E7): Power Input Pins.
Apply input voltage between these pins and GND pins.
Recommend placing input decoupling capacitance directly
between V IN pins and GND pins.
V OUT (D8-D11, E8-E11, F6-F11, G6-G11): Power Output
Pins. Apply output load between these pins and GND pins.
Recommend placing output decoupling capacitance directly
between these pins and GND pins. Review Table 4.
GND (G3-G5, F3-F5, E4-E5, A1-A11, B6-B11, C8-C11):
Power Ground Pins for Both Input and Output Returns.
TRACK (E1): Output Voltage Tracking Pin. When the module
is con?gured as a master output, then a soft-start capaci-
tor is placed on the RUN/SS pin to ground to control the
master ramp rate. Slave operation is performed by putting
a resistor divider from the master output to 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 V IN . Load current must be present for
tracking. See Applications Information section.
FB (G2): The Negative Input of the Error Ampli?er. Inter-
nally, this pin is connected to V OUT with a 4.99k precision
resistor. Different output voltages can be programmed
with an additional resistor between 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 Information section.
COMP (G1): Current Control Threshold and Error Ampli?er
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.
PGOOD (F1): 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/SS (D1): 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 V IN and
a 1000pF capacitor to GND. See Application Information
section for soft-start information.
SW (B3 and B4): Switching Node of the circuit is used for
testing purposes. This can be connected to copper on the
board to improve thermal performance. Make sure not to
connect it to other output pins.
TOP VIEW
TRACK
PGOOD
A
B
C
D
E
F
G
V IN
1
COMP
2
3
SW
RUN/
SS
GND
FB
4
5
6
7
8
9
10
11
GND
V OUT
4604fa
6
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