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LTM4606
PIN FUNCTIONS
f SET (Pin B12): Frequency set internally to 800kHz in
continuous conducting mode at light load. An external
resistor can be placed from this pin to ground to increase
frequency. See the Applications Information section for
frequency adjustment.
V FB (Pin F12): The Negative Input of the Error Amplifier.
Internally, this pin is connected to V OUT with a 60.4k preci-
sion resistor. Different output voltages can be programmed
with an additional resistor between the V FB and SGND pins.
See the Applications Information section.
MARG0 (Pin C12): LSB Logic Input for the Margining
Function. Together with the MARG1 pin, the MARG0 pin
will determine if a margin high, margin low, or no margin
state is applied. The pin has an internal pulldown resistor
of 50k. See the Applications Information section.
MARG1 (Pins C11, D12): MSB Logic Input for the Margin-
ing Function. Together with the MARG0 pin, the MARG1
pins will determine if a margin high, margin low, or no
margin state is applied. The pins have an internal pull-down
resistor of 50k. See the Applications Information section.
SGND (Pins D9, H12): Signal Ground Pins. These pins
connect to PGND at output capacitor point. See Figure 17.
COMP (Pins A11, D11): Current Control Threshold and
Error Amplifier Compensation Point. The current com-
parator threshold increases with this control voltage. The
voltage ranges from 0V to 2.4V with 0.7V corresponding
to zero sense voltage (zero current).
PGOOD (Pin G12): Output Voltage Power Good Indicator.
Open-drain logic output that is pulled to ground when the
output voltage is not within ±10% of the regulation point,
after a 25μs power bad mask timer expires.
RUN (Pins A10, B9): Run Control Pins. A voltage above
1.9V will turn on the module, and below 1V will turn off
the module. A programmable UVLO function can be ac-
complished with a resistor divider from V IN to ground. See
Figure 1. This pin has a 5.1V Zener to ground. Maximum
pin voltage is 5V. Limit current into the RUN pin to less
than 1mA.
NC (Pins J12, K12, L12): These pads must be left floating
(electrical open circuit) and are used for enhanced solder
joint strength.
4606fd
8
For more information www.linear.com/LTM4606
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