APXS002A0X-SRZ Datasheet, PDF (16/24 Pages) General Semiconductor – 2A PicoTLynxTM: Non-Isolated DC-DC Power Modules 3Vdc –14Vdc input; 0.6Vdc to 5.5Vdc output; 2A Output Current

GE
2A PicoTLynx^TM: Non-Isolated DC-DC Power Modules
3Vdc –14Vdc input; 0.6Vdc to 5.5Vdc output; 2A Output Current
Data Sheet
VOUT
SENSE
MODULE
TRIM
GND
RTUNE
CO
CTUNE
RTrim
Figure. 58. Circuit diagram showing connection of RTUME and
CTUNE to tune the control loop of the module.
Recommended values of RTUNE and CTUNE for different output
capacitor combinations are given in Tables 2 and 3. Table 2
shows the recommended values of RTUNE and CTUNE for different
values of ceramic output capacitors up to 470uF that might be
needed for an 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. Tables 3,4 and 5 list 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 1A to 2A
step change (50% of full load), for input voltages of 12V, 5V and
3.3V respectively.
Please contact your GE Critical 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/5V/3.3V and various external ceramic capacitor
combinations.
Co 1x47μF 2x47μF 3x47μF 4x47μF 10x47μF
RTUNE
CTUNE
220
3900pF
150
10nF
100
18nF
100
18nF
100
22nF
Table 3. Recommended values of RTUNE and CTUNE to obtain
transient deviation of ≤2% of Vout for a 1A step load with
Vin=12V
Vo 5V 3.3V 2.5V 1.8V 1.2V 0.6V
Co
1x22μF 1x47μF
2x47μF
2x47μF
3x47μF
330μF
Polymer
RTUNE 220 220 150 150 100 100
CTUNE2200pF3900pF 10nF 10nF 18nF 68nF
ΔV 81mV 61mV 35mV 34mV 23mV 12mV
Table 4. Recommended values of RTUNE and CTUNE to obtain
transient deviation of ≤2% of Vout for a 1A step load with
Vin=5V
Vo 3.3V 2.5V 1.8V 1.2V 0.6V
Co
1x47μF
2x47μF
2x47μF
3x47μF
330μF
Polymer
RTUNE 220
150
CTUNE 3900pF 10nF
ΔV 62mV 35mV
150
10nF
34mV
100
18nF
23mV
100
68nF
12mV
Table 5. Recommended values of RTUNE and CTUNE to
obtain transient deviation of ≤2% of Vout for a 1A step
load with Vin=3.3V
Vo
2.5V
1.8V
1.2V
0.6V
Co
RTUNE
CTUNE
ΔV
3x47μF
100
18nF
48mV
2x47μF
150
10nF
34mV
3x47μF
100
18nF
23mV
330μF
Polymer
100
68nF
12mV
February 26, 2013
©2013 General Electric Company. All rights reserved.
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