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PDF APL1117 Data sheet ( Hoja de datos )
| Número de pieza | APL1117 | |
| Descripción | 1A Low Dropout Fast Response Positive Adjustable Regulator | |
| Fabricantes | Anpec Electronics | |
| Logotipo |  |
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APL1117
1A Low Dropout Fast Response Positive Adjustable Regulator and Fixed
1.8V, 2.5V, 2.85V and 3.3V
Features
General Description
• Guaranteed Output Voltage Accuracy within 2% The APL1117 is a low dropout three-terminal adjust-
able regulators with 1A output current capability. In
• Fast Transient Response
order to obtain lower dropout voltage and faster tran-
• Guaranteed Dropout Voltage at Multiple
Currents
sient response, which is critical for low voltage ap-
plications , the APL1117 has been optimized. The
device is available in an adjustable version and fixed
• Load Regulation : 0.1% Typ.
• Line Regulation : 0.03% Typ.
output voltages of 1.8V, 2.5V, 2.85V and 3.3V. The
output available voltage range of an adjustable ver-
sion is from 1.25~10.7V with an input supply below
• Low Dropout Voltage : 1.1V Typ. at IOUT =1A
• Current Limit : 1A Typ. at TJ=25°C
12V. Dropout voltage is guaranteed at a maximum of
1.3V at 1A. Current limit is trimmed to ensure speci-
fied output current and controlled short-circuit current.
• On-Chip Thermal Limiting : 150°C Typ.
• Adjustable Output : 1.25~10.7V
On-chip thermal limiting provides protection against
any combination of overload that would create exces-
sive junction temperatures. The APL1117 is available
• Standard 3-pin TO-220, TO-252, TO-263 and
SOT-223 Power Packages
in the industry standard 3-pin TO-220, TO-252, TO-
263, and the low profile surface mount SOT-223
power packages which can be used in applications
where space is limited.
Applications
Pin Description
• Active SCSI Terminators
• Low Voltage Logic Supplies
• Battery-Powered Circuitry
• Post Regulator for Switching Power Supply
Front View for TO-220
3V
IN
2V
OUT
1 ADJ/GND
Front View for TO-263
TAB is VOUT
3 VIN
2
V
OUT
1 ADJ/GND
Front View for TO-252
3
V
IN
TAB IS V
OUT
2V
OUT
1 ADJ/GND
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. B.8 - Jun., 2003
1
www.anpec.com.tw
1 page  
www.DataSheet4U.com
APL1117
Application Circuits
1.25V to 10.7V Adjustable Regulator
Improving Ripple Rejection
APL1117
VIN IN OUT
ADJ R1
121Ω
+ 10µF
C1*
R2
1k
VOUT1
+ 100µF
C2
* Needed if device is far from filter capacitors
R1 + R2
VOUT = 1.250V X R1
5V Regulator with Shutdown
V IN
+
10µF
APL1117
IN OUT
ADJ
R2
365Ω
1%
* C1 improves ripple rejection.
XC should be approximately
equal to R1 at ripple frequency
R1
121Ω
1%
+ C1
10µF
VOUT
150µ F
APL1117
VIN IN OUT
ADJ
+
10µF
1k
TTL
1k
121Ω
1%
+
365Ω
1%
5V
100µF
Copyright ANPEC Electronics Corp.
Rev. B.8 - Jun., 2003
5
www.anpec.com.tw
5 Page 
www.DataSheet4U.com
APL1117
Application Information (Cont.)
Thermal Considerations (Cont.)
60
TA=25°C
55
50
45
40
35
30
0 2 4 6 8 10 12 14
Top Copper Area (cm2)
Figure 4.
θ(J-A) vs. copper area for the SOT-223 package
The thermal resistance for each application will be
affected by thermal interactions with other compo-
nents on the board. Some experimentation will be
necessary to determine the actual value.
The power dissipation of APL1117 is equal to :
PD = (VIN - VOUT) x IOUT
Maximum junction temperature is equal to :
TJUNCTION = TAMBIENT + (PD x θJA)
Note: TJUNCTION must not exceed 125°C
Copyright ANPEC Electronics Corp.
Rev. B.8 - Jun., 2003
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet APL1117.PDF ] | |
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