Copyright
ANPEC Electronics Corp.
Rev. A.1 - Dec., 2000
APL1088
www.anpec.com.tw
1
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
500mA Low Dropout Linear Regulator
Features
General Description
Applications
Ordering Information
Output Voltage Accuracy
2.0%
Line Regulation - 1mV (typ.)
Load Regulation - 6mV (typ.)
Input Voltage Range up to 9V
Internal Current Limiting and Thermal Shut-
down Protections
SOT-89 and TO-92 Packages Available
The APL1088 is a 3-pin low dropout linear regulator
with 2.0% accuracy of output voltage over line , load
and temperature variations. The output current ca-
pability of APL1088 is over 500mA. Dropout voltage
at 500mA output current is less than 1.5V(max). Both
output current limiting and thermal shutdown are built
in to provide maximal protection to the APL1088
against fault conditions. The over current and ther-
mal shutdown circuits become active when the cur-
rent exceed 500mA , or the junction temperature
reach 150
C. Normal operation is recovered when
junction temperature drops below 130
C.
Voltage Regulator for CD-ROM Drivers
Voltage Regulator for LAN Cards
Voltage Regulator for mother Boards
Wireless Communication Systems
Portable Instrument
Portable Consumer Equipment
Low Voltage Systems
Package Code
D : SOT-89
E : TO-92
Temp. Range
C : 0 to 70 C
Handling Code
TR : Tape & Reel PB : Plastic Bag
APL1088
Package Code
Handling Code
Temp. Range
SOT-89 (Top View)
V
IN
V
OUT
ADJ
2
1
3
APL1088
V
IN
V
out
ADJ
TO-92 (Top View)
Copyright
ANPEC Electronics Corp.
Rev. A.1 - Dec., 2000
APL1088
www.anpec.com.tw
2
Block Diagram
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
V
IN
Input Voltage
9
V
I
OUT
Output Current
0.75
A
T
A
Operating Ambient Temperature Range
0 to 70
C
T
J
Operating Junction Temperature Range
-40 to +150
C
T
STG
Storage Temperature Range
-65 to +150
C
P
D
Power Dissipation
Internal limited
mW
JA
Thermal Resistance Junction to Ambient
180
C / W
Electrical Characteristics
(T
A
=25
C, unless otherwise noted)
V
OUT
Thermal
Shutdown
V
IN
GND
Current
Limit
V
REF
+
-
APL1088
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
IN
Input Voltage
2.75
9
V
V
OUT
Output Voltage
I
OUT
=10mA
1.225
1.250
1.275
V
I
OUT
Output Current Capability V
OUT
=3.3V,
V
OUT
=2%
500
mA
I
SC
Short Circuit Current
V
OUT
<
0.4V
1.0
A
I
ADJ
Adjustable Pin Current
V
IN
=5V, No Load
60
120
uA
I
LMIN
Minimum Load Current
2.75V
V
IN
9.00V,
2
10
mA
REG
LINE
Line Regulation
I
OUT
=10mA, V
IN
= 5V to
9V
1
6
mV
REG
LOAD
Load Regulation
I
OUT
=1mA~500mA
6
12
mV
Copyright
ANPEC Electronics Corp.
Rev. A.1 - Dec., 2000
APL1088
www.anpec.com.tw
3
Electrical Characteristics cont.
(T
A
=25
C, unless otherwise noted)
Application Schematic
* Required for stability, APL1088 :C
2
=10
F
* R1 is typically in range of 100
to 120
to meet Imin requirement.
Fixed 1.250V Output
Programmable Output setting by External Resistors(R1 and R2)
APL1088
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DROPOUT
Dropout Voltage
I
OUT
=500mA,
V
OUT
=1%
1500
mV
PSRR
Power Supply Rejection
Ratio
at 1kHz
55
dB
OTS
Over Temperature
Shutdown
150
C
E
N
Output Noise
100
Vrms
TC
Output Voltage
Temperature Coefficient
100
ppm/
C
APL1088
C
OUT1
0.1uF
V
IN
V
OUT
C
IN
1uF
C
OUT2
10uF
+
+
+
APL1088
V
IN
V
OUT
C
1
10uF
+
+
R
1
R
2
Solid Tantalum
C
2*
R1/(R1+R2)=V
REF
/V
OUT
PDF 
ZIP
