GE Industrial Solutions PicoTLynx 6A - Manual (Page 16)

GE
Data Sheet
PicoTLynx TM 6A: Non-Isolated DC-DC Power Modules
2.4Vdc –5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A Output Current
September 11, 2013 ©2013 General Electric Company. All rights reserved. Page 16
might be needed for an application to meet output ripple and
noise requirements. Selecting R
TUNE
and C
TUNE
according to
Tables 3 or 5 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. Tables 3 and 5 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 6A
step change (50% of full load), with an input voltage of 5V or
3.3V respectively
Please contact your Lineage Power 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 or input voltages other than 5V.
Table 2. General recommended values of of R
TUNE
and C
TUNE
for
Vin=5V and various external ceramic capacitor combinations.
Cext 1x47μF 2x47μF 4x47μF 6x47μF 10x47μF 20x47μF
R
TUNE
47 47 47 33 33 33
C
TUNE
4700pF 10nF 33nF 47nF 56nF 68nF
Table 3. Recommended values of R
TUNE
and C
TUNE
to obtain
transient deviation of ≤2% of Vout for a 3A step load with
Vin=5V.
Vo 3.3V 2.5V 1.8V 1.2V 0.6V
Co 3 x 47 μF 4 x 47μF 5 x 47μF
1 x 47 μF +
330uF
Polymer
6 x 47 μF +
330uF Polymer
R
TUNE
100 56 47 33 33
C
TUNE
15nF 18nF 27nF 47nF 39nF
ΔV 58mV 45mV 34mV 24mV 12mV
Table 4. General recommended values of of R
TUNE
and C
TUNE
for Vin=3.3V and various external ceramic capacitor
combinations.
Co 1x47 μF 2x47μF 4x47μF 6x47μF 10x47μF 20x47μF
R
TUNE
47 47 47 33 33 33
C
TUNE
10nF 15nF 39nF 47nF 68nF 82nF
Table 5. Recommended values of R
TUNE
and C
TUNE
to obtain
transient deviation of ≤2% of Vout for a 3A step load with
Vin=3.3V.
Vo 2.5V 1.8V 1.2V 0.6V
Co 6 x 47 μF 6 x 47μF
2 x 47 μF +
330uF
Polymer
2 x 330uF Polymer
R
TUNE
33 33 33 33
C
TUNE
47nF 47nF 68nF 220nF
ΔV 46mV 33mV 24mV 12mV