APL1117
1A Low Dropout Fast Response Positive Adjustable Regulator and
Fixed 1.2V,1.8V, 2.5V, 2.85V, 3.3V and 5V
Features
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Guaranteed Output Voltage Accuracy within 2%
Fast Transient Response
Guaranteed Dropout Voltage at Multiple Currents
Load Regulation : 0.1% Typ.
Line Regulation : 0.03% Typ.
Low Dropout Voltage : 1.1V Typ. at I
OUT
=1A
Current-Limit : 1A Typ. at T
J
=25°C
On-Chip Thermal Limiting : 150°C Typ.
Adjustable Output : 1.25~10.7V
Standard 3-pin TO-220, TO-252-3, TO-263-3 and
SOT-223 Power Packages
Lead Free and Green Devices Available
(RoHS Compliant)
General Description
The APL1117 is a low dropout three-terminal adjustable
regulators with 1A output current capability. In order to
obtain lower dropout voltage and faster transient
response, which is critical for low voltage applications,
the APL1117 has been optimized. The device is available
in an adjustable version and fixed output voltages of 1.2V,
1.8V, 2.5V, 2.85V, 3.3V, and 5V. The output available volt-
age range of an adjustable version is from 1.25 to 10.7V
with an input supply below 12V. Dropout voltage is guar-
anteed at a maximum of 1.3V at 1A. Current limit is
trimmed to ensure specified output current and controlled
short-circuit current. On-chip thermal limiting provides
protection against any combination of overload that would
create excessive junction temperatures. The APL1117 is
available in the industry standard 3-pin TO-220, TO-252-
3, TO-263-3, and the low profile surface mount SOT-223
power packages which can be used in applications where
space is limited.
Applications
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Active SCSI Terminators
Low Voltage Logic Supplies
Post Regulator for Switching Power Supply
Simplified Application Circuits
1.25V to 10.7V Adjustable Regulator
V
IN
APL1117
IN
OUT
ADJ
+
10µ F
C
1*
V
OUT1
R1
121Ω
+
R2
1k
100µ F
C
2
Improving Ripple Rejection
APL1117
IN
OUT
ADJ
R2
365Ω
1%
V
IN
10µF
+
R1
121Ω
1%
+
C1
10µF
V
OUT
150µF
* Needed if device is far from filter capacitors
V
OUT
= 1.250V X
R1 + R2
R1
* C1 improves ripple rejection.
X
C
should be approximately
equal to R1 at ripple frequency
5V Regulator with Shutdown
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.
Copyright
©
ANPEC Electronics Corp.
Rev. C.10 - Sep., 2010
1
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
