LTM8031_15 Datasheet, PDF (7/22 Pages) Linear Technology – Ultralow Noise EMC 36V, 1A DC/DC Module Regulator

LTM8031
Pin Functions
SYNC (Pin L6): This is the external clock synchronization
input. Ground this pin for low ripple Burst Mode^® operation
at low output loads. Tie to a stable voltage source greater
than 0.7V to disable Burst Mode operation. Do not leave
this pin floating. Tie to a clock source for synchroniza-
tion. Clock edges should have rise and fall times faster
than 1µs. See Synchronization section in Applications
Information.
PGOOD (Pin K7): The PGOOD pin is the open-collector
output of an internal comparator. PGOOD remains low until
the ADJ pin is within 10% of the final regulation voltage.
The PGOOD output is valid when V_IN is above 3.6V and
RUN/SS is high. If this function is not used, leave this
pin floating.
ADJ (Pin J7): The LTM8031 regulates its ADJ pin to 0.79V.
Connect the adjust resistor from this pin to ground. The
value of R_ADJ is given by the equation:
R_ADJ
=
196.71
V_OUT – 0.79
where R_ADJ is in kΩ.
Block Diagram
FIN
EMI FILTER
V_IN
GND
4.7µH
22pF 249k
V_OUT
AUX
10µF
GND
BIAS
SHARE
CURRENT
MODE
CONTROLLER
RUN/SS
SYNC
RT PGOOD
ADJ
8031 BD
8031fb
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