Datasheet

DS_V48SH05017_10282013
5
ELECTRICAL CHARACTERISTICS CURVES
Figure 10: Test set-up diagram showing measurement points
for Input Terminal Ripple Current and Input Reflected Ripple
Current.
Note: Measured input reflected-ripple current with a
simulated source Inductance (L
TEST
) of 12 μH. Capacitor Cs
offset possible battery impedance. Measure current as shown
above
Figure 11: Input Terminal Ripple Current, i
c
, at full
rated output current and nominal input voltage with
12µH source impedance and 33µF electrolytic
capacitor (100 mA/div, 1us/div)
Figure 12: Input reflected ripple current, i
s
, through a 12µH
source inductor at nominal input voltage and rated load
current (20 mA/div, 1us/div)
Figure 13: Output voltage noise and ripple
measurement test setup
Figure 14: Output voltage ripple at nominal input voltage
and rated load current (Io=full load)(50 mV/div, 1us/div)
Load capacitance: 1µF ceramic capacitor and 10µF
tantalum capacitor. Bandwidth: 20 MHz. Scope
measurements should be made using a BNC cable (length
shorter than 20 inches). Position the load between 51 mm
to 76 mm (2 inches to 3 inches) from the module.
0
0
0
StripCopper
Vo(-)
Vo(+)
10u 1u
SCOPE RESISTIVE
LOAD
Vin+
Vin-
is
ic
100uF,
ESR=0.2 ohm @
25
o
C 100KHz
Cs: 220uF
+ +
Vin+
Vin-
is
ic
100uF,
ESR=0.2 ohm @
25
o
C 100KHz
Cs: 220uF
+ +
is
ic
100uF,
ESR=0.2 ohm @
25
o
C 100KHz
Cs: 220uF
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