FGSR12SR6003A Datasheet, PDF (10/23 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
VOUT
SENSE
MODULE
TRIM
GND
RTUNE
CO
CTUNE
RTrim
Table 3: Recommended values of R_TUNE and
C_TUNE to obtain transient deviation of 2% of Vout
for a 1.5A step load with Vin=12V.
Vo 5V 3.3V 2.5V 1.8V 1.2V 0.6V
Co
1x47uF
1x47uF
2x47uF
1x330uF 1x330uF 2x330uF
Polymer Polymer Polymer
R_TUNE 270
120
180
180
180
180
C_TUNE 1500pF 1800pF 3300pF 8200pF 8200pF 33nF
△V 68mV 60mV 37mV 18mV 18mV 10mV
Fig-10: Circuit diagram showing connection of
R_TUNE and C_TUNE to tune the control loop of the
module.
Note: The capacitors used in the Tunable Loop
tables are 47uF/3 mΩ ESR ceramic and 330uF/12
mΩ ESR polymer capacitors.
Recommended values of R_TUNE and C_TUNE for
different output capacitor combinations are given in
Tables 2. Table 2 shows the recommended values of
R_TUNE and C_TUNE for different values of ceramic output
capacitors up to 1000uF that might be needed for an
application to meet output ripple and noise
requirements. Selecting R_TUNE and C_TUNE according to
Table 2 will ensure stable operation of the module. In
applications with tight output voltage limits in the
presence of dynamic current loading, additional
output capacitance will be required. Table 3 lists
recommended values of R_TUNE and C_TUNE in order to
meet 2% output voltage deviation limits for some
common output voltages in the presence of a 3A to
3A step change (50% of full load), with an input
voltage of 12V.
Please contact your FDK technical representative to
obtain more details of this feature as well as for
guidelines on how to select the right value of external
R-C to tune the module for best transient
performance and stable operation for other output
capacitance values.
Table 2: General recommended value of R_TUNE
and C_TUNE for Vin=12V and various external
ceramic capacitor combinations.
Co 1x47uF 2x47uF 4x47uF 6x47uF 10x47uF
R_TUNE 270
C_TUNE 1500pF
220
1800pF
180
3300pF
180
4700pF
180
4700pF
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Ver 2.0 Nov. 11, 2013