APL1117_10 Datasheet, PDF (1/19 Pages) Anpec Electronics Coropration – 1A Low Dropout Fast Response Positive Adjustable Regulator and Fixed 1.2V,1.8V, 2.5V, 2.85V, 3.3V and 5V

APL1117
1A Low Dropout Fast Response Positive Adjustable Regulator and
Fixed 1.2V,1.8V, 2.5V, 2.85V, 3.3V and 5V
Features
General Description
• 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)
Applications
• Active SCSI Terminators
• Low Voltage Logic Supplies
• Post Regulator for Switching Power Supply
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.
Simplified Application Circuits
1.25V to 10.7V Adjustable Regulator
APL1117
V_IN
IN
OUT
ADJ
R1
121Ω
+ 10µ F
C_1*
R2
1k
V_OUT1
+ ^{100µ F}
C₂
Improving Ripple Rejection
V_IN
+
10µF
APL1117
IN
OUT
ADJ
R1
121Ω
1%
R2
365Ω
1%
+ ^C1
10µF
V_OUT
150µF
* Needed if device is far from filter capacitors
VOUT
=
1.250V
X
R1 + R2
R1
5V Regulator with Shutdown
* C1 improves ripple rejection.
X_C should be approximately
equal to R1 at ripple frequency
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.
1
Rev. C.10 - Sep., 2010
www.anpec.com.tw