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
2
Aug. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
1A LOW DROPOUT LINEAR REGULATOR AP2218
4
EN
GND
T Package
(TO-220F-4)
3
V
OUT
Pin Configuration
2
1
V
IN
Figure 2. Pin Configuration of AP2218 (Top View)
Pin Description
Pin Number
Pin Name
Function
1
V
IN
Unregulated Input.
2
V
OUT
Regulated Output.
3
GND
Ground pin. This pin and TAB are internally connected.
4
EN
Logic high enable input.
3
Aug. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
1A LOW DROPOUT LINEAR REGULATOR AP2218
Functional Block Diagram
Figure 3. Functional Block Diagram of AP2218
16V
Thermal
Shutdown
Reference
+
-
V
IN
V
OUT
GND
1.24V
EN
4
3
2
1
Ordering Information
Package
Circuit Type
T: TO-220F-4
AP2218
-
3.3: Fixed Output 3.3V
Blank: Tin Lead
E1: Lead Free
5.0: Fixed Output 5.0V
4
Aug. 2005 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
1A LOW DROPOUT LINEAR REGULATOR AP2218
Note 1:
Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Max-
imum Ratings" for extended periods may affect device reliability.
Parameter Symbol
Value
Unit
Supply Voltage
V
IN
15
V
Maximum Operating Junction Temperature
T
J
150
o
C
Storage Temperature Range
T
STG
-65 to 150
o
C
Lead Temperature (Soldering, 10sec)
T
LEAD
300
o
C
ESD (Machine Model)
350
V
ESD (Human Body Model)
2000
V
Absolute Maximum Ratings (Note 1)
Package
Temperature
Range
Part Number
Marking ID
Package
Type
Tin Lead
Lead Free
Tin Lead
Lead Free
TO-220F-4
-40 to 125
o
C
AP2218T-3.3
AP2218T-3.3E1
AP2218T-3.3
AP2218T-3.3E1 Tube
AP2218T-5.0
AP2218T-5.0E1
AP2218T-5.0
AP2218T-5.0E1 Tube
Recommended Operating Conditions
Parameter
Symbol
Min
Max
Unit
Supply Voltage
V
IN
8
V
Operating Junction Temperature
T
J
-40
125
o
C
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Ordering Information (Continued)
Aug. 2005 Rev. 1. 0
1A LOW DROPOUT LINEAR REGULATOR AP2218
Preliminary Datasheet
1A LOW DROPOUT LINEAR REGULATOR AP2218
5
BCD Semiconductor Manufacturing Limited
Parameter
Symbol
Condition
Min
Typ
Max
Unit
Output Voltage
V
OUT
I
OUT
=10mA
3.27
3.3
3.33
V
10mA
I
OUT
1A,
4.3V
V
IN
6.3V
(Note 2)
3.23
3.37
V
Line Regulation
V
RLINE
I
OUT
=10mA, 4.3V
V
IN
8V
3.3
33
mV
Load Regulation
V
RLOAD
V
IN
=4.3V, 10mA
I
OUT
1A
6.6
50
mV
Output Voltage
Temperature Coefficient
V
OUT
/
T
I
OUT
=10mA
66
330
V/
o
C
Dropout Voltage (Note 3)
V
DROP
V
OUT
=1%
I
OUT
=100mA
70
200
mV
I
OUT
=1A
300
550
mV
Ground Current
I
GND
V
IN
=4.3V
I
OUT
=750mA
6
15
mA
I
OUT
=1A
10
mA
Current Limit
I
LIMIT
V
OUT
=0V (Note 4)
1.5
2.2
A
Minimum Load Current
I
LOAD(MIN)
1
5
mA
Output Noise Voltage (rms)
10Hz to 100KHz, I
OUT
=100mA,
C
OUT
=10
F
400
V
Enable Input
Enable Input Voltage
V
EN
Logic low (off)
0.8
V
Logic high (on)
2.25
V
Enable Input Current
I
IN
V
EN
=2.25V
1
15
30
75
A
V
EN
=0.8V
2
4
A
Shutdown Output Current
I
OUT(SHDN)
(Note 5)
10
20
A
Electrical Characteristics
AP2218-3.3V Electrical Characteristics
Note 2: For the details of V
IN
range, please refer to (V
IN
-V
OUT
)*I
LOAD
maximum power dissipation (
Figure 4).
Note 3: Dropout voltage is defined as the input-to-output differential when the output voltage drops to 99% of its nominal value
which is measured at V
OUT
+1V applied to V
IN
.
Note 4: V
IN
=V
OUT(NOMINAL)
+1V.
Note 5: V
EN
0.8V, V
IN
8V,
V
OUT
=0V.
Operating Conditions: V
IN
=4.3V, C
IN
=10
F, C
OUT
=10
F, T
J
=25
o
C, unless otherwise specified. The Boldface
applies over -40
o
C
T
J
125
o
C. (P
maximum power dissipation.)
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