Data Sheet
12V TLynxTM: Non-isolated DC-DC Power Modules
July 24, 2009
4.5 – 14Vdc input; 0.69Vdc to 5.5Vdc output; 20A output current
application to meet output ripple and noise
requirements. Selecting RTUNE and CTUNE 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 RTUNE and CTUNE in order to
meet 2% output voltage deviation limits for some
common output voltages in the presence of a 10A to
20A step change (50% of full load), with an input
voltage of 12V.
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 12V.
Table 2. General recommended values of of RTUNE
and CTUNE for Vin=12V and various external
ceramic capacitor combinations.
Co
1x47μF 2x47μF 4x47μF 10x47μF 20x47μF
RTUNE
240
240
240
150
150
CTUNE 1500pF 2700pF 5600pF
12nF
15nF
Table 3. General Recommended values of RTUNE
and CTUNE to obtain transient deviation of 2% of
Vout for a 10A step load with Vin=12V.
Vo
5V
3.3V
2.5V
1.8V
1.2V
0.69V
5x47μF
+
330μF
Polymer
6x47μF 6x47μF
2x
330μF
Polymer
12
x330μF
Polymer
+
+
Co
6x47μF
2x330μF 4x330μF
Polymer Polymer
RTUNE 220
220
200
150
150
150
CTUNE 5600pF 7500pF 18nF
99mV 66mV 50mV
33nF
120nF
24mV
120nF
12mV
36mV
ΔV
LINEAGE POWER
18
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
