FGSR12SR6003A Datasheet, PDF (9/23 Pages) List of Unclassifed Manufacturers – 3-14.4Vdc Input, 3A, 0.6-5.5Vdc Output

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FGSR12SR6003*A
3-14.4Vdc Input, 3A, 0.6-5.5Vdc Output
Data Sheet
loss of regulation occurs that would result in the
output voltage going ±10% outside the setpoint value.
The PGOOD terminal can be connected through a
pull-up resistor (suggested value 100KΩ) to a source
of 5VDC or lower.
Fig-7: Circuit Configuration for margining Output
Voltage.
Over-Current Protection
To provide protection in a fault (output overload)
condition, the unit is equipped with internal
current-limiting circuitry and can endure current
limiting continuously. At the point of current-limit
inception, the unit enters hiccup mode. The unit
operates normally once the output current is brought
back into its specified range.
Over-Temperature Protection
To provide protection in a fault condition, the unit is
equipped with a thermal shutdown circuit. The unit
will shutdown if the overtemperature threshold of
135^oC(typ) is exceeded at the thermal reference point
T_ref. Once the unit goes into thermal shutdown it will
then wait to cool before attempting to restart.
Input Under-Voltage Lockout (UVLO)
At input voltages below the input under-voltage
lockout limit, the module operation is disabled. The
module will begin to operate at an input voltage
above the under-voltage lockout turn-on threshold.
Power Good
The module provides a Power Good (PGOOD) signal
that is implemented with an open-drain output to
indicate that the output voltage is within the
regulation limits of the power module. The PGOOD
signal will be de-asserted to a low state if any
condition such as over-temperature, over-current or
Dual Layout
Identical dimensions and pin layout of Analog and
Digital 3A Tomodachi modules permit migration from
one to the other without needing to change the
layout. To support this, 2 separate Trim Resistor
locations have to be provided in the layout. For the
digital modules, the resistor is connected between
the TRIM pad and SGND and in the case of the
analog module it is connected between TRIM and
GND
MODULE TRIM
SIG_GND
Rtrim1
for
Digital
Rtrim2
for
Analog
GND (PIN 7)
Caution – Do not connect SIG_GND to GND elsewhere in
the layout
Fig-9: Layout to support either Analog or Digital
6A Tomodachi modules on the same pad.
Tunable Loop™
The module has a feature that optimizes transient
response of the module called Tunable Loop™
External capacitors are usually added to the output of
the module for two reasons: to reduce output ripple
and noise (see Fig-10) and to reduce output voltage
deviations from the steady-state value in the
presence of dynamic load current changes. Adding
external capacitance however affects the voltage
control loop of the module, typically causing the loop
to slow down with sluggish response. Larger values
of external capacitance could also cause the module
to become unstable.
The Tunable Loop™ allows the user to externally
adjust the voltage control loop to match the filter
network connected to the output of the module. The
Tunable Loop™ is implemented by connecting a
series R-C between the VS+ and TRIM pins of the
module, as shown in Fig-10. This R-C allows the user
to externally adjust the voltage loop feedback
compensation of the module.
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Ver 2.0 Nov. 11, 2013