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PDF ( 数据手册 , 数据表 ) LD1117A12

零件编号 LD1117A12
描述 1A Low Dropout Positive Voltage Regulator
制造商 TAITRON
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LD1117A12 数据手册, 描述, 功能
1 A Low Dropout
Positive Voltage Regulator
LD1117A12/ADJ-LD1117A50/ADJ
1A Low Dropout Positive Voltage Regulator
General Description
LD1117A is a three terminal low dropout positive voltage regulator.
It provides current limiting and thermal shut down and its circuit includes a trimmed
Bandgap reference to assure output voltage accuracy for both fixed output voltage
version and adjustable output voltage version. Current limit is trimmed to ensure
specified output current and controlled short-circuit current.On-chip thermal shutdown
provides protection against any combination of overload and ambient temperature that
would create excessive junction temperature
There are 7 Fixed output voltages :1.2V, 1.5V,1.8V, 2.5V ,2.85V,3.3V an 5.0V.
There are also an adjustble version provide output voltage from 1.25V to 12V with
2 external resisitors.
They are suitable for applications that required supply current up to 1 A.
LD1117A series are available in SOT-223 ,SOT-89 ,TO-220,DPAK (TO-252) and
D2PAK (TO-263) Packages
Features
Input Voltage up to 20V
Output Current up to 1A
Low Drop Output Voltage:Typical 1.15V at 1A output current
Output Voltage Accuracy : ±1% for fixed output Voltage 1.5V,1.8V, 2.5V ,2.85V,
3.3V,5.0V and Adjustble Output Voltage Version.
±2% for fixed output Voltage 1.2V
Trimmed Current Limit and On-Chip Thermal Shutdown
Operation Junction Temperature: -40°C to 125°C
RoHS Compliance and Halogen Free
Applications
PC Mother Board
Graphic Card
NIC/Switch
LCD Monitor , DVD Video Player and Printer
Telecom Equipment and other Peripheral Equipment
SOT-223
SOT-89
TO-220
DPAK
D2PAK
TAITRON COMPONENTS INCORPORATED www.taitroncomponents.com
Tel: (800)-TAITRON (800)-824-8766 (661)-257-6060
Fax: (800)-TAITFAX (800)-824-8329 (661)-257-6415
Rev. A/LX
Page 1 of 21
Free Datasheet http://www.datasheet4u.com/







LD1117A12 pdf, 数据表
1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Electrical Characteristics
For LD1117A-ADJ (VIN10V, TJ=25°C, unless otherwise specified)
Symbol
Description
VREF Reference Voltage
VLINE
VLOAD
ILIMIT
IADJ
IADJ
ILOAD
IQ
Line Regulation
Load Regulation
Current Limit
Adjust Pin Current
Adjust Pin Current Change
Minimum Load Current
Quiescent Current
VD Dropout Voltage
eN
PSRR
-
-
Output Noise Voltage
Power Supply Ripple Rejection
Ratio
Temperature Stability
Long-term Temperature Stability
SOT-223
Thermal
Resistance
SOT-89
TO-220
DPAK
D2PAK
LD1117A-ADJ
Min.
Type.
Max.
1.238 1.250 1.262
1.225 1.250 1.270
- 0.035 0.2
- 0.2 0.4
1.25 1.35 -
- 60 120
- 0.2 5
- 1.7 5
- 5 10
- 1.0 1.1
1.08 1.18
1.15 1.25
- 0.003 -
60 75
-
- 0.5 -
- 0.3
- 25 -
- 30 -
- 10 -
- 17 -
- 10 -
Unit
V
V
%
%
A
uA
uA
mA
mA
V
V
V
%
dB
%
%
° C/W
Test Conditions
VIN-VO=2V, IO=10mA
1.4VVIN-VO8V, 10mAIO1A
PDPD(max),
1.5VVIN-VO10V, IO=10mA
VIN-VO=2V,10mAIO1A
VIN-VO=2V
-
1.4VVIN-VO10V, 10mAIO1A
1.5VVIN-VO10V,(ADJ only)
VIN-VO=1.25V
VREF=1%,IO=100mA
VREF=1%,IO=500mA
VREF=1%,IO=1A
10Hzf10KHz,TA=25°C
VIN-VO=3V, IO=1A, f=120Hz
CO=22uF Tantalum
-
TA=125°C,1000hrs
-
-
-
-
-
For LD1117A12 (VIN10V, TJ=25°C, unless otherwise specified)
Symbol
Description
LD1117A12
Min.
Type.
Max.
VO Output Voltage
1.176 1.2 1.224
1.152 1.2 1.248
VLINE Line Regulation
VLOAD Load Regulation
- 16
- 1 10
ILIMIT Current Limit
1.25 1.35 -
IQ Quiescent Current
- 5 10
Unit
V
V
mV
mV
A
mA
www.taitroncomponents.com
Test Conditions
VIN =3.2V, IO=10mA
3.0VVIN10V,10mAIO1A
1.5VVIN-VO10V, IO=10mA
VIN-VO=2V,10mAIO1A
VIN-VO=2V
VIN-VO=1.25V
Rev. A/LX
Page 8 of 21
Free Datasheet http://www.datasheet4u.com/







LD1117A12 equivalent, schematic
1A Low Dropout Positive Voltage Regulator
LD1117A12/ADJ -LD1117A50/ADJ
Fig.9 PD-TC
Fig.10 PSRR-f
Operation Case Temperature TC (°C)
Fig.11 Line Transient Response
LD1117A33
VIN=4.8 to5.8V
IO=100mA
CIN=1uF
COUT=10uF
Time (20us/Div)
www.taitroncomponents.com
Frequency f (Hz)
Fig.12 Load Transient Response
LD1117A33
VIN=4.8V
IO=100mA to 500mA
CIN=10uF
COUT=10uF
Time (10us/Div)
Rev. A/LX
Page 16 of 21
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