ELECTRICAL CHARACTERISTICS CURVES
Turn-on transient at zero load current (2 ms/div). Top
Figure5
:
Trace: Vout (1V/div); Bottom Trace: ON/OFF Control (2V/div).
s i
TEST
12uH
Cs:68uF/100V
ESR< 0.3
Ω
20
100KHz
﹫
℃
Test set-up diagram showing measurement points for
Figure 7
:
Input Reflected Ripple Current (Figure 8).
Note: Measured input reflected-ripple current with a simulated
source Inductance (L
) of 12 µH. Capacitor Cs offset possible
TEST
battery impedance.
Vi(+)
68uF/100V
ESR< 0.3
Ω
20
℃ 100KHz
﹫
Vi(-)
Figure 6: Output voltage response to step-change in load
current (50%-100%-50% of Io, max; di/dt = 0.1A/µs). Load
Ω
cap: 10µF, 100 m
E SR tantalum capacitor and 1µF
ceramic capacitor. Top Trace: Vout (50mV/div), Bottom
Trace: Iout (2A/div).
Input Reflected Ripple Current, i s , at full rated
.
Figure 8:
output current and nominal input voltage with 12
impedance and 68
F electrolytic capacitor (2 mA/div).
µ
H source
µ
4
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