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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.
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.
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
zSOT-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
ABSOLUTE MAXIMUM RATINGS
z Maximum Supply Voltage
z Power Dissipation
z Thermal Resistance
Junction to Case, θJC
z Thermal Resistance
Junction to Ambient, θJA
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.
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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, TA = 25°C)
Parameter
Symbol
Test Conditions
Typical
Reference Voltage
(Adjustable version) VREF VIN = 5V, IOUT = 10mA
1.25V
Output Voltage
(Fixed version)
VO VIN = 5V, IOUT = 10mA
VO
Dropout Voltage
VD ΔVREF = 1%, IOUT = 1A
1.2V
Line Regulation
REG(LINE) (VOUT + 1.5V) VIN 15V, IOUT = 10mA 0.5%
Load Regulation REG(LOAD) (VIN -VOUT) = 2V, 10mA IOUT 1A
0.5%
Minimum Load
Current
IO 1.5V (VIN -VOUT) 5.75V
10mA
Adjust Pin Current IADJ
55µA
Current Limit
ICL VIN - VOUT = 2V
1.2A
RMS Output Noise VN
0.003%
of VOUT
Ripple Rejection
Ratio
RA
f = 120Hz, CADJ = 22µF for ADJ pin,
VIN = 5V, IOUT = 1A
72dB
Limits
1.23VMin
1.27VMax
0.98VO(Min)
1.02VO(Max)
1.45V
2%
2.5%
100µA
1.1A (Min)
60dB (Min)
ELECTRICAL CHARACTERISTICS for L1117-2.5(Unless otherwise specified, TA = 25 °C)
Parameter
Symbol
Test Conditions
Typical
Output Voltage
(Fixed version)
Dropout Voltage
Line Regulation
Load Regulation
Minimum Load
Current
GND Pin Current
Current Limit
RMS Output Noise
Ripple Rejection
Ratio
VO VIN = 5V, IOUT = 10mA
VD ΔVO = 1%, IOUT = 1A
REG(LINE) (VOUT + 1.5V) VIN 15V, IOUT = 10mA
REG(LOAD) (VIN -VOUT) = 2V, 10mA IOUT 1A
IO
IGND
ICL
1.5V (VIN -VOUT) 5.75V
VIN - VOUT = 2V
VN
RA
f = 120Hz, Co=22Uf,VIN = 5V,
IOUT = 1A
VO
1.2V
0.5%
0.5%
10mA
55µA
1.2A
0.003%
of VOUT
72dB
Limits
2.45V(Min)
2.55V(Max)
1.45V
2.0%
2.0%
100µA
1.1A (Min)
60dB (Min)
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NIKO-SEM
1A Fixed and Adjustable Low
Dropout Linear Regulator (LDO)
L1117 Series
SOT-223, TO-252,
TO-220,TO-263
ELECTRICAL CHARACTERISTICS for L1117-2.85(Unless otherwise specified, TA = 25 °C)
Parameter
Symbol
Test Conditions
Typical
Output Voltage
(Fixed version)
Dropout Voltage
Line Regulation
Load Regulation
Minimum Load
Current
GND Pin Current
Current Limit
VO VIN = 5V, IOUT = 10mA
VD ΔVO = 1%, IOUT = 1A
REG(LINE) (VOUT + 1.5V) VIN 8V, IOUT = 10mA
REG(LOAD) (VIN -VOUT) = 2V, 10mA IOUT 1A
IO
IGND
ICL
1.5V (VIN -VOUT) 5.75V
VIN - VOUT = 2V
RMS Output Noise VN
Ripple Rejection
Ratio
RA
f = 120Hz, Co=22Uf,VIN = 5V,
IOUT = 1A
VO
1.2V
0.5%
0.5%
10mA
55µA
1.2A
0.003%
of VOUT
72dB
Limits
2.793V(Min)
2.907V(Max)
1.45V
2.0%
2.0%
100µA
1.1A (Min)
60dB (Min)
ELECTRICAL CHARACTERISTICS for L1117-3.3(Unless otherwise specified, TA = 25 °C)
Parameter
Symbol
Test Conditions
Typical
Output Voltage
(Fixed version)
Dropout Voltage
Line Regulation
Load Regulation
Minimum Load
Current
GND Pin Current
Current Limit
RMS Output Noise
Ripple Rejection
Ratio
VO VIN = 5V, IOUT = 10mA
VD ΔVO = 1%, IOUT = 1A
REG(LINE) (VOUT + 1.5V) VIN 15V, IOUT = 10mA
REG(LOAD) (VIN -VOUT) = 2V, 10mA IOUT 1A
IO
IGND
ICL
1.5V (VIN -VOUT) 5.75V
VIN - VOUT = 2V
VN
RA
f = 120Hz, Co=22Uf,VIN = 5V,
IOUT = 1A
VO
1.2V
0.5%
0.5%
10mA
55µA
1.2A
0.003%
of VOUT
72dB
Limits
3.234V(Min)
3.367V(Max)
1.45V
2.0%
2.0%
100µA
1.1A (Min)
60dB (Min)
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NIKO-SEM
1A Fixed and Adjustable Low
Dropout Linear Regulator (LDO)
L1117 Series
SOT-223, TO-252,
TO-220,TO-263
ELECTRICAL CHARACTERISTICS for L1117-5(Unless otherwise specified, TA = 25 °C)
Parameter
Symbol
Test Conditions
Typical
Output Voltage
(Fixed version)
Dropout Voltage
Line Regulation
Load Regulation
Minimum Load
Current
GND Pin Current
Current Limit
RMS Output Noise
Ripple Rejection
Ratio
VO VIN = 8V, IOUT = 10mA
VD ΔVO = 1%, IOUT = 1A
REG(LINE) (VOUT + 1.5V) VIN 15V, IOUT = 10mA
REG(LOAD) (VIN -VOUT) = 2V, 10mA IOUT 1A
IO
IGND
ICL
1.5V (VIN -VOUT) 5.75V
VIN - VOUT = 2V
VN
RA
f = 120Hz, Co=22uf,VIN = 8V,
IOUT = 1A
VO
1.2V
0.5%
0.5%
10mA
55µA
1.2A
0.003%
of VOUT
72dB
Limits
4.90V(Min)
5.10V(Max)
1.45V
1.0%
1.0%
100µA
1.1A (Min)
60dB (Min)
DEVICE SELECTION GUIDE
Device
Voltage Version
Package
Marking
L1117L
ADJ
SOT-223
L1117L
L1117D
ADJ
TO-252
L1117D
L1117L-2.5 L1117L-2.85 L1117L-3.3 L1117D-3.3 L1117L-5
2.5 2.85
3.3
3.3
5
SOT-223 SOT-223 SOT-223 TO-252 SOT-223
L1117L-2.5 L1117L-2.85 L1117L-3.3 L1117D-3.3 L1117L-5
Device
Voltage Version
Package
Marking
L1117D-5
5
TO-252
L1117D-5
L1117T
ADJ
TO-220
L1117T
L1117T-3.3
3.3
TO-220
L1117T-3.3
L1117T-5
5
TO-220
L1117T-5
L1117S-5
5
TO-263
L1117S-5
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NIKO-SEM
1A Fixed and Adjustable Low
Dropout Linear Regulator (LDO)
L1117 Series
SOT-223, TO-252,
TO-220,TO-263
TYPICAL APPLICATION
Vin
Cin
10uF
+
L1117
IN OUT
ADJ
Vref
Iadj
Vout
R1
Cout
+
10uF
R2
Vin
4.3v-8V IN
OUT
L1117-2.85
Cin
+
10uF
GND
Cout
+ 18~27 Lines
22uF
Vo = Vref (1+R2/R1) + Iadj x R2
1. Cin needed if device is far from from filter capacitors.
2. Cout required for stability.
- Basic Adjustable Regulator Circuit -
- Active SCSI Bus Terminators -
Vin > 4.75V
IN
L1117-3.3
OUT
Vout=3.3V
Cin
+
10uF
GND
Cout
+
22uF
RL
Vin > 4.00V
IN
L1117-2.5
OUT
Vout=2.5V
Cin
+
10uF
GND
Cout
+
22uF
RL
Basic Fixed Output Regulator Circuit
Vin>6.5V
IN
L1117-5
OUT
Cin
10uF
+
GND
Cout
22uF
+
RL
Basic Fixed Output Regulator Circuit
Basic Fixed Output Regulator Circuit
5
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JUL-27-2001