2024年4月15日发(作者：委永昌)
NIKO-SEM
1A Fixed and Adjustable Low
Dropout Linear Regulator (LDO)
L1117 Series
SOT-223, TO-252,
TO-220,TO-263
GENERAL DESCRIPTION
The L1117 Series are positive and low drop-
out three-terminal voltage regulators with
1A output current capability. These devices
are designed for use in low voltage applica-
tions that offers lower dropout voltage and
faster transient response.
These devices are fully protected against
over current faults, over temperature oper-
ation, reversed input polarity, reversed lead
insertion, transient voltage spike …etc.
On-Chips trimming the reference voltage to
2% and features the low dropout of maxi-
mum 1.45 volts.
FEATURES
z
Fixed 2.5V, 2.85V, 3.3V, 5V or adjustable
output voltage
z
Low dropout voltage:
1.2V typical at up to 1A
z
Low ground current
z
Fast transient response
z
Current & thermal limiting
z
Line regulation: 0.5% typical
z
Load regulation: 0.5% typical
z
SOT-223,TO-220,TO-252,TO-263
package
APPLICATIONS
z
2.85V active SCSI terminators
z
8-15V to 5V linear regulators
z
5V to 2.5V or 3.3V linear regulators
z
Low voltage micro-controllers
z
Battery Chargers
z
Motherboard clock supplies
z
Post regulator for switching supplies
z
Micro-controllers
The L1117 Series regulators offer fixed and
adjustable voltage options available in the
popular industry standard SOT-223, TO-220,
TO-252 and TO-263 packages.
ABSOLUTE MAXIMUM RATINGS
z
Maximum Supply Voltage
z
Power Dissipation
z
Thermal Resistance
Junction to Case,
θ
JC
z
Thermal Resistance
Junction to Ambient,
θ
JA
SOT-223
TO-252
TO-220
TO-263
15V*
Internally
Limited
16 °C/W
158 °C/W
70 °C/W
50 °C/W
60 °C/W
z
Operating Junction
Temperature Range
z
Storage Temperature
Range
z
Lead Temperature
(Soldering, 10 Seconds)
0 to 125 °C
-40 to 150 °C
260 °C
* When considering short circuits to ground, the maximum input-to-output differential voltage shall not be allowed
greater than approximate 2~3V at values of supply voltage in excess of 10V, continuous short-circuits can exceed
the power dissipation ratings and cause eventual destruction.
JUL-27-2001
1
NIKO-SEM
1A Fixed and Adjustable Low
Dropout Linear Regulator (LDO)
L1117 Series
SOT-223, TO-252,
TO-220,TO-263
ELECTRICAL CHARACTERISTICS for ADJUSTABLE
(Unless otherwise specified, T
A
= 25°C)
Parameter
Symbol
Test Conditions Typical Limits
1.23V
Min
Reference Voltage
V1.25V V
REF
IN
= 5V, I
OUT
= 10mA
1.27V
Max
(Adjustable version)
Output Voltage 0.98V
O(Min)
V V = 5V, I = 10mAV
OINOUTO
(Fixed version) 1.02V
O(Max)
Dropout Voltage V
D
1.2V 1.45V
Δ
V
REF
= 1%, I
OUT
= 1A
Line Regulation REG
(LINE)
(V
OUT
+ 1.5V)
≤
V
IN
≤
15V, I
OUT
= 10mA
0.5% 2%
Load Regulation REG
(LOAD)
(V
IN
-V
OUT
) = 2V, 10mA
≤
I
OUT
≤
1A
0.5% 2.5%
Minimum Load
10mA I
-V) 5.75V 1.5V (V
≤
IN OUT
≤
O
Current
Adjust Pin Current I
ADJ
55
µ
A 100
µ
A
Current Limit I
CL
V
IN
- V
OUT
= 2V 1.2A 1.1A (Min)
0.003%
RMS Output Noise V
N
of V
OUT
Ripple Rejection
f = 120Hz, C
ADJ
= 22
µ
F for ADJ pin,
72dB 60dB (Min) R
A
Ratio
V
IN
= 5V, I
OUT
= 1A
ELECTRICAL CHARACTERISTICS for L1117-2.5
(Unless otherwise specified, T
A
= 25 °C)
Parameter
Output Voltage
(Fixed version)
Dropout Voltage
Line Regulation
Load Regulation
Symbol
V
O
Test Conditions
V
IN
= 5V, I
OUT
= 10mA
Typical
V
O
Limits
2.45V
(Min)
2.55V
(Max)
V
D
1.2V 1.45V
Δ
V
O
= 1%, I
OUT
= 1A
REG
(LINE)
(V
OUT
+ 1.5V)
≤
V
IN
≤
15V, I
OUT
= 10mA
0.5% 2.0%
REG
(LOAD)
(V
IN
-V
OUT
) = 2V, 10mA
≤
I
OUT
≤
1A
0.5% 2.0%
Minimum Load
I 10mA
1.5V (V-V) 5.75V
≤≤
O
IN OUT
Current
GND Pin Current I
GND
55
µ
A 100
µ
A
Current Limit I
CL
V
IN
- V
OUT
= 2V 1.2A 1.1A (Min)
0.003%
RMS Output Noise V
N
of V
OUT
Ripple Rejection f = 120Hz, Co=22Uf,V
IN
= 5V,
72dB 60dB (Min) R
A
Ratio I
OUT
= 1A
JUL-27-2001
2
2024年4月15日发(作者：委永昌)
NIKO-SEM
1A Fixed and Adjustable Low
Dropout Linear Regulator (LDO)
L1117 Series
SOT-223, TO-252,
TO-220,TO-263
GENERAL DESCRIPTION
The L1117 Series are positive and low drop-
out three-terminal voltage regulators with
1A output current capability. These devices
are designed for use in low voltage applica-
tions that offers lower dropout voltage and
faster transient response.
These devices are fully protected against
over current faults, over temperature oper-
ation, reversed input polarity, reversed lead
insertion, transient voltage spike …etc.
On-Chips trimming the reference voltage to
2% and features the low dropout of maxi-
mum 1.45 volts.
FEATURES
z
Fixed 2.5V, 2.85V, 3.3V, 5V or adjustable
output voltage
z
Low dropout voltage:
1.2V typical at up to 1A
z
Low ground current
z
Fast transient response
z
Current & thermal limiting
z
Line regulation: 0.5% typical
z
Load regulation: 0.5% typical
z
SOT-223,TO-220,TO-252,TO-263
package
APPLICATIONS
z
2.85V active SCSI terminators
z
8-15V to 5V linear regulators
z
5V to 2.5V or 3.3V linear regulators
z
Low voltage micro-controllers
z
Battery Chargers
z
Motherboard clock supplies
z
Post regulator for switching supplies
z
Micro-controllers
The L1117 Series regulators offer fixed and
adjustable voltage options available in the
popular industry standard SOT-223, TO-220,
TO-252 and TO-263 packages.
ABSOLUTE MAXIMUM RATINGS
z
Maximum Supply Voltage
z
Power Dissipation
z
Thermal Resistance
Junction to Case,
θ
JC
z
Thermal Resistance
Junction to Ambient,
θ
JA
SOT-223
TO-252
TO-220
TO-263
15V*
Internally
Limited
16 °C/W
158 °C/W
70 °C/W
50 °C/W
60 °C/W
z
Operating Junction
Temperature Range
z
Storage Temperature
Range
z
Lead Temperature
(Soldering, 10 Seconds)
0 to 125 °C
-40 to 150 °C
260 °C
* When considering short circuits to ground, the maximum input-to-output differential voltage shall not be allowed
greater than approximate 2~3V at values of supply voltage in excess of 10V, continuous short-circuits can exceed
the power dissipation ratings and cause eventual destruction.
JUL-27-2001
1
NIKO-SEM
1A Fixed and Adjustable Low
Dropout Linear Regulator (LDO)
L1117 Series
SOT-223, TO-252,
TO-220,TO-263
ELECTRICAL CHARACTERISTICS for ADJUSTABLE
(Unless otherwise specified, T
A
= 25°C)
Parameter
Symbol
Test Conditions Typical Limits
1.23V
Min
Reference Voltage
V1.25V V
REF
IN
= 5V, I
OUT
= 10mA
1.27V
Max
(Adjustable version)
Output Voltage 0.98V
O(Min)
V V = 5V, I = 10mAV
OINOUTO
(Fixed version) 1.02V
O(Max)
Dropout Voltage V
D
1.2V 1.45V
Δ
V
REF
= 1%, I
OUT
= 1A
Line Regulation REG
(LINE)
(V
OUT
+ 1.5V)
≤
V
IN
≤
15V, I
OUT
= 10mA
0.5% 2%
Load Regulation REG
(LOAD)
(V
IN
-V
OUT
) = 2V, 10mA
≤
I
OUT
≤
1A
0.5% 2.5%
Minimum Load
10mA I
-V) 5.75V 1.5V (V
≤
IN OUT
≤
O
Current
Adjust Pin Current I
ADJ
55
µ
A 100
µ
A
Current Limit I
CL
V
IN
- V
OUT
= 2V 1.2A 1.1A (Min)
0.003%
RMS Output Noise V
N
of V
OUT
Ripple Rejection
f = 120Hz, C
ADJ
= 22
µ
F for ADJ pin,
72dB 60dB (Min) R
A
Ratio
V
IN
= 5V, I
OUT
= 1A
ELECTRICAL CHARACTERISTICS for L1117-2.5
(Unless otherwise specified, T
A
= 25 °C)
Parameter
Output Voltage
(Fixed version)
Dropout Voltage
Line Regulation
Load Regulation
Symbol
V
O
Test Conditions
V
IN
= 5V, I
OUT
= 10mA
Typical
V
O
Limits
2.45V
(Min)
2.55V
(Max)
V
D
1.2V 1.45V
Δ
V
O
= 1%, I
OUT
= 1A
REG
(LINE)
(V
OUT
+ 1.5V)
≤
V
IN
≤
15V, I
OUT
= 10mA
0.5% 2.0%
REG
(LOAD)
(V
IN
-V
OUT
) = 2V, 10mA
≤
I
OUT
≤
1A
0.5% 2.0%
Minimum Load
I 10mA
1.5V (V-V) 5.75V
≤≤
O
IN OUT
Current
GND Pin Current I
GND
55
µ
A 100
µ
A
Current Limit I
CL
V
IN
- V
OUT
= 2V 1.2A 1.1A (Min)
0.003%
RMS Output Noise V
N
of V
OUT
Ripple Rejection f = 120Hz, Co=22Uf,V
IN
= 5V,
72dB 60dB (Min) R
A
Ratio I
OUT
= 1A
JUL-27-2001
2