Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Typical Application
AP2121-1.5
VIN=2.5V
VOUT=1.5V
VOUT
VIN
VIN
VOUT
GND
COUT
1µF
CIN
1µF
AP2121-3.0
VIN=4V
VOUT=3V
VOUT
VIN
VIN
VOUT
GND
COUT
CE
NC
1µF
CIN
1µF
Note: Filter capacitors are required at the AP2121's input and output. 1µF capacitor is required at the input. The
minimum output capacitance required for stability should be more than 1µF with ESR from 0.01Ω to 100Ω.
Ceramic capacitors are recommended.
Figure 22. Typical Application of AP2121
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
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