1
Aug. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
1A LOW DROPOUT LINEAR REGULATOR AP2218
Figure 1. Package Type of AP2218

TO-220F-4
General Description
The AP2218 is a low dropout linear regulator with a
typical dropout of 300mV at 1A output current.
The AP2218 provides current limit and thermal shut-
down. On-chip thermal shutdown provides protection
against any combination of high current and ambient
temperature that would create excessive junction tem-
peratures.
The AP2218 has 3.3V and 5.0V versions.
The AP2218 is available in the industry standard TO-
220F-4 package.
Features
·Minimum Guaranteed Output Current: 1A
·Dropout Voltage at I
OUT
=1A: 300mV
·Output Accuracy: ± 1%
·Low Ground Current
·Internal Current Limit and Thermal Protection
·Reversed-battery and Reversed-lead Insertion
Protection
·Fast Transient Response
Applications
·Power Module
·Set Top Box
·LCD TV
·PDP TV
·Cordless Phone