Diodes AP2138/2139 - Manual (Page 21)

21
Jul. 2012 Rev. 2. 3 BCD Semiconductor Manufacturing Limited
Data Sheet
ULTRA LOW QUIESCENT CURRENT CMOS LDO AP2138/2139
Typical Application
Figure 18. Typical Application of AP2138/2139
V
IN
AP2138-1.4
C
IN
1 μF
C
OUT
1 μF
V
OUT
V
IN
V
OUT
GND
V
IN
=2.4V V
OUT
=1.4V
Note: Filter capacitors are required at the AP2138/2139's input and output. 1 μF capacitor is required at the input.
The minimum output capacitance required for stability should be more than 1 μF with ESR from 0.01Ω to 100Ω.
Ceramic capacitors are recommended.
V
IN
AP2139-3.0
C
IN
1 μF
C
OUT
1 μF
V
OUT
V
IN
V
OUT
GND
CE NC
V
OUT
=3V V
IN
=4V