SiP21106, SiP21107, SiP21108
Vishay Siliconix
TYPICAL OPERATING WAVEFORMS
SiP21107: 1.8 V
VIN = 2.8 V
VOUT = 1.8 V
CIN = 1 µF
COUT = 1 µF
CBP = 10 nF
IOUT = 1 mA
VOUT (500 mV/DIV)
POK (1 V/DIV)
20 µs/DIV
POK pin is actively high to indicate an output normal
operation condition on regular
TYPICAL WAVEFORMS
VOUT (500 mV/DIV)
POK (1 V/DIV)
SiP21107: 2.8 V
VIN = 3.8 V
VOUT = 2.8 V
CIN = 1 µF
COUT = 1 µF
CBP = 10 nF
IOUT = 1 mA
20 µs/DIV
POK pin is actively high to indicate an output normal
operation condition on regular
1
VOUT (100 µV/DIV)
VNOISE = 60 µVRMS
2 ms/DIV
Output Noise
SiP21106: 2.8 V
VIN = 4.5 V
VOUT = 2.8 V
CIN = 1 µF
COUT = 1 µF
CBP = 10 nF
IOUT = 150 mA
FUNCTIONAL BLOCK DIAGRAM
0.1
0.01
10
SiP21106: 2.8 V
VIN = 3.8 V
VOUT = 2.8 V
CIN = 1 µF
COUT = 1 µF
CBP = 10 nF
IOUT = 100 mA
100
1K
10K
100K
1M
Frequency (Hz)
Output Noise Spectral Density
VIN
EN
B*P/A*d*j/P*O**K
Enable
Bandgap
Reference
Current Limit and
Thermal
Error-Amp
VOUT
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12
+
POK
-
0.94 VOUT
SiP21106: BP
SiP21107: POK
SiP21108: Adj
* SiP21106: BP
*** SiP21107: POK
** SiP21108: Adj
Figure 3.
GND
Document Number: 74442
S09-1047-Rev. G, 08-Jun-09