Data Sheet
300mA HIGH SPEED, EXTREMELY LOW NOISE CMOS LDO REGULATOR
Functional Block Diagram (Continued)
AP2128
SHUTDOWN
UVLO &
Shutdown
Logic
Thermal
Shutdown
Foldback
Current Limit
GND
3MΩ
VREF
Adjustable Version
Figure 3. Functional Block Diagram of AP2128
VIN
VOUT
ADJ
Jun. 2008 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
3