SI9185 Datasheet, PDF (9/12 Pages) Vishay Siliconix – Micropower 500-mA CMOS LDO Regulator

TYPICAL WAVEFORMS
Line Transient Response-1
V_IN
2 V/div
5.00 ms/div
V_INSTEP = 4.3 to 5.3 V
V_OUT = 3.3 V
C_OUT = 2.2 mF
C_IN = 10 mF
I_LOAD = 500 mA
t_rise = 5 msec
Turn-On Sequence
V_IN 2 V/div
V_OUT 2 V/div
C_delay 2 V/div
ERROR 2 V/div
10.00 ms/div
V_IN = 4.2 V
V_OUT = 3.3 V
C_delay = 0.1 mF
C_NOISE = 0.1 mF
I_LOAD = 350 mA
Output Noise
500 mV/div
1 ms/div
V_IN = 4.2 V
V_OUT = 3.3 V
I_OUT = 150 mA
C_NOISE = 0.1 mF
BW = 10 Hz to 1 MHz
Document Number: 71765
S-20641—Rev. B, 06-May-02
Si9185
Vishay Siliconix
V_OUT
1 V/div
Line Transient Respons-2
V_OUT
10 mV/div
5.00 ms/div
V_INSTEP = 5.3 to 4.3 V
V_OUT = 3.3 V
C_OUT = 2.2 mF
C_IN = 10 mF
I_LOAD = 500 mA
t_fall = 5 msec
Turn-Off Sequence
V_IN
CH-3 2 V/div
V_OUT
CH-1 2 V/div
C_delay
CH-4 2 V/div
ERROR
CH-2 2 V/div
5.00 ms/div
V_IN = 4.2 V
V_OUT = 3.3 V
C_delay = 0.1 mF
C_NOISE = 0.1 mF
I_LOAD = 350 mA
Noise Spectrum
10.0
mVń ^ǸHz
0.01
100 Hz
V_IN = 4.1 V
V_OUT = 3.3 V/10 mA
C_NOISE = 0.1 mF
1 MHz
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