ltm4604a Linear Technology Corporation, ltm4604a Datasheet - Page 6

• Manufacturer Part Number: ltm4604a
• Description: Low Voltage, 4a Dc/dc ?module With Tracking
• Manufacturer: Linear Technology Corporation

PIN FUNCTIONS
LTM4604A
V
Apply input voltage between these pins and GND pins.
Recommend placing input decoupling capacitance directly
between V
V
Pins. Apply output load between these pins and GND
pins. Recommend placing output decoupling capaci-
tance 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 confi 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
tracking. See Applications Information section.
FB (G2): The Negative Input of the Error Amplifi er. Inter-
nally, this pin is connected to V
resistor. Different output voltages can be programmed
6
OUT
IN
(B1, C1, C3-C7, D7, E6 and E7): Power Input Pins.
(D8-D11, E8-E11, F6-F11, G6-G11): Power Output
IN
pins and GND pins.
IN
. Load current must be present for
OUT
with a 4.99k precision
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 Amplifi 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
a 1000pF capacitor to GND. See Application Information
section for soft-start information. The shut down pin
should be pull low with a falling edge of ≤ 1μs to ensure
the device does not transition slowly through the internal
under voltage lockout threshold.
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.
IN
4604af
and