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PDF BL1117 Data sheet ( Hoja de datos )
| Número de pieza | BL1117 | |
| Descripción | 1A Low Dropout Voltage Regulator | |
| Fabricantes | SHANGHAI BELLING | |
| Logotipo |  |
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Outline：
BL1117 is a series of low dropout three-
terminal regulators with a dropout of 1.2V at
1A load current.
Other than a fixed version（Vout＝
1.8V,2.5V,2.85V,3.3V,5V）, BL1117 has an
adjustable version, which can provide an
output voltage from 1.25 to 13.8V with only
two external resistors。
BL1117 offers thermal shut down and
current limit functions, to assure the stability
of chip and power system. And it uses
trimming technique to guarantee output
voltage accuracy within ±1％.
BL1117 is available in SOT-223,TO-252
and TO-220 power package。
Selection Guide：
BL1117-XX X X
BL1117
1A Low Dropout Voltage Regulator
Features：
• Other than a fixed version and an
adjustable version, output value can be
customized on command.
• Maximum output current is 1A
• Output voltage accuracy is within ±1％
• Range of operation input voltage: Max
15V
• Line regulation: 0.2％
• Load regulation: 0.4％
• Environment Temperature: -40℃~85℃
Applications：
• Power Management for Computer
Mother Board, Graphic Card
• LCD Monitor and LCD TV
• DVD Decode Board
• ADSL Modem
• Post Regulators for Switching Supplies
Pin Configuration：
Package Type：
X：SOT-223
Y：TO-252
Z：TO-220
Temp. Range & Rohs Std.：
C：140C & Pb-free Rhos Std
Z: 140C & Pb/Sn Plating
Output Voltage：
18……1.8V
25……2.5V
28……2.85V
50……5.0V
Default：Adjustable
Version
http://www.belling.com.cn
-1-
Total 13 Pages
A：
Means
Manufacture
weeks
B：
Means
Manufacture LOT
No.
C:
Means Output
Voltage Value
D:
Means Temp.
Range&Rohs Std
1/29/2008
1 page  
BL1117-2.85V, Vin-Vout=1.25V
BL1117
4 8 mA
BL1117-3.3V, Vin-Vout=1.25V
4 8 mA
BL1117-5V, Vin-Vout=1.25V
4 8 mA
IAdj
Ichange
Adjust Pin
Current
(Adjustable
Version)
Adjust Pin
Current
Change
55 120 uA
0.2 uA
Temperature
Stability
0.5 %
θJC
Thermal
Resistor
SOT-223
TO-252
TO-220
20
10 ℃ / W
4.5
Note：
Note1：The Parameters of Line Regulation and Load Regulation in Table1 are tested under
constant junction temperature. The Curve of Load Regulation vs. Temperature is
shown in typical parameter curve that follows.
Note2： When Iout varies between 0~1A,Vin-Vout varies between 1.5V~12V under constant
junction temperature，the parameter is satisfied the criterion in table. If temperature
varies between -40℃≤TA≤85℃，it needs output current to be larger than 10mA to
satisfy the criterion.
Note3：Dropout Voltage is specified over the full output current range of the device, and it is
tested under following testing conditions: First step is to find out the Vout value(Vout1)
when Vin1=Vout+1.5V, second step is to decrease Vin(Vin2) until Vout value is equal
to 99%*Vout1(Vout2). Vdropout=Vin2-Vout2.
Note4：Minimum Load Current is defined as the minimum output current required to maintain
regulation. When 1.5V≦Vin-Vout≦12V，the device is guaranteed to regulate if the
output current is greater than 10mA.
Detailed Description:
BL1117 is a series of low dropout voltage, three terminal regulators. Its application circuit is
very simple: the fixed version only needs two capacitors and the adjustable version only needs two
resistors and two capacitors to work. It is composed of some modules including start-up circuit,
bias circuit, bandgap, thermal shutdown, current limit, power transistors and its driver circuit and so
on.
The thermal shut down and current limit modules can assure chip and its application system
working safety when the junction temperature is larger than 140℃ or output current is larger than
1.4A.
http://www.belling.com.cn
-5-
Total 13 Pages
1/29/2008
5 Page 
2.TO-252
Package
TO-252
Package specification：
Devices per
reel
2500
BL1117
Unit mm
Taping dimension：（M1：Standard Type ，M2：Customized）
http://www.belling.com.cn
- 11 -
Total 13 Pages
1/29/2008
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet BL1117.PDF ] | |
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