Data Sheet
April 1, 2008
Austin Lynx
TM
SIP Non-isolated Power Modules, Programmable:
3.0Vdc – 5.5Vdc input; 0.75 to 3.63Vdc Output; 10A Output Current
Test Configurations
TO OSCILLOSCOPE
L
TEST
1μH
V
IN
(+)
CURRENT PROBE
Design Considerations
Input Filtering
Austin Lynx
TM
SIP module should be connected to a
low-impedance source. A highly inductive source can
affect the stability of the module. An input capacitance
must be placed directly adjacent to the input pin of the
module, to minimize input ripple voltage and ensure
module stability.
To minimize input voltage ripple, low-ESR polymer and
ceramic capacitors are recommended at the input of the
module. Figure 27 shows input ripple voltage (mVp-p)
for various outputs with 1x150 µF polymer capacitors
(Panasonic p/n: EEFUE0J151R, Sanyo p/n:
6TPE150M) in parallel with 1 x 47 µF ceramic capacitor
(Panasonic p/n: ECJ-5YB0J476M, Taiyo- Yuden p/n:
CEJMK432BJ476MMT) at full load. Figure 28 shows
the input ripple with 3x150 µF polymer capacitors in
parallel with 2 x 47 µF ceramic capacitor at full load.
Input Ripple Voltage (mVp-p)
180
160
140
120
100
80
60
40
20
0
0.5
1
1.5
2
2.5
3
3.5
3.3Vin
5Vin
BATTERY
C
S
1000μF
Electrolytic
E.S.R.<0.1Ω
@ 20°C 100kHz
C
IN
2x100μF
Tantalum
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (L
TEST
) of 1μH. Capacitor C
S
offsets
possible battery impedance. Measure current as shown
above.
Figure 24. Input Reflected Ripple Current Test
Setup.
COPPER STRIP
V
O
(+)
1uF
COM
.
10uF
SCOPE
RESISTIVE
LOAD
GROUND PLANE
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 25. Output Ripple and Noise Test Setup.
R
distribution
R
contact
V
IN
(+)
V
O
R
contact
R
distribution
Output Voltage (Vdc)
Figure 27. Input ripple voltage for various output
with 1x150 µF polymer and 1x47 µF ceramic
capacitors at the input (full load).
120
V
IN
V
O
Input Ripple Voltage (mVp-p)
R
LOAD
100
80
60
40
20
0
0.5
1
1.5
2
2.5
3
3.5
3.3Vin
5Vin
R
distribution
R
contact
COM
COM
R
contact
R
distribution
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 26. Output Voltage and Efficiency Test Setup.
V
O
. I
O
Efficiency
η
=
V
IN
. I
IN
x
100 %
Output Voltage (Vdc)
Figure 28. Input ripple voltage for various output
with 3x150 µF polymer and 2x47 µF ceramic
capacitors at the input (full load)
LINEAGE
POWER
10
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
