UNISONIC TECHNOLOGIES CO., LTD
LD1117/A
LINEAR INTEGRATED CIRCUIT
LOW DROP FIXED AND
ADJUSTABLE POSITIVE
VOLTAGE REGULATORS
DESCRIPTION
The UTC LD1117/A is a low dropout, 3-terminal positive
voltage regulator designed to provide output current up to
800mA/1A, There are adjustable version (VREF=1.25V) and
various fixed versions.
FEATURES
* Low dropout voltage
* Suitable for SCSI-2 active termination if VOUT set to 2.85V
* Output current up to 0.8A for 1117 and 1.0A for 1117A
* Built-in current limit and over temperature protection
* Low current consumption
* Support MLCC
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
LD1117L-xx-AA3--
LD1117G-xx-AA3--
LD1117L-xx-AB3--
LD1117G-xx-AB3--
LD1117L-xx-TA3--
LD1117G-xx-TA3--
LD1117L-xx-TF3--
LD1117G-xx-TF3--
LD1117L-xx-TN3--
LD1117G-xx-TN3--
LD1117L-xx-TND--
LD1117G-xx-TND--
LD1117L-xx-T2Q--
LD1117G-xx-T2Q--
LD1117L-xx-TQ2--
LD1117G-xx-TQ2--
LD1117L-xx-TQ3--
LD1117G-xx-TQ3--
LD1117L-xx-S08--
LD1117G-xx-S08--
Notes: 1. : Current code: Blank: 800mA
A: 1A
2. Pin Assignment: I: VIN O: VOUT
G: GND/ADJ
3. xx: Output Voltage, Refer to Marking Information.
Package
SOT-223
SOT-89
TO-220
TO-220F
TO-252
TO-252D
TO-262
TO-263
TO-263-3
SOP-8
Pin Assignment
Pin Code
A
B
C
D
1
G
O
G
I
2
O
G
I
G
Packing
3
I
I
O
O
R: Tape Reel
T: Tube
GOOIxOOx
(1) R: Tape Reel, T: Tube
LD1117 1 G-xx-AA3- 2 - 3
(2) refer to Pin Assignment
(1)Packing Type
(3) AA3: SOT-223, AB3: SOT-89, TA3:TO-220,
(2)Pin Assignment
(3) TF3: TO-220F, TN3: TO-252, TND: TO-252D
(3)Package Type
(3) T2Q: TO-262, TQ2: TO-263, TQ3: TO-263-3,
(4)Output Voltage Code
(5)Green Package
(6)Current Code
www.unisonic.com.tw
Copyright © 2017 Unisonic Technologies Co., Ltd
(3) S08: SOP-8
(4) xx: refer to Marking Information
(5) G: Halogen Free and Lead Free, L: Lead Free
(6) Blank: 800mA, A: 1A
1 of 15
QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
SOT-89
SOT-223
TO-220
TO-220F
TO-252
TO-252D
TO-262
TO-263
TO-263-3
12 :1.2V
15 :1.5V
18 :1.8V
25 :2.5V
2J :2.85V
30 :3.0V
33 :3.3V
36 :3.6V
50 :5.0V
AD :ADJ
SOP-8
Note: Current code:
Blank: 0.8A
A: 1A
PIN CONFIGURATION of SOP-8
GND/
ADJ
1
8
NC
VOUT
2
7
VOUT
VOUT
3
6
VOUT
VIN
4
5
NC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 15
QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 15
QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25°C)
PARAMETER
SYMBOL
RATINGS
UNIT
DC Input Voltage
VIN
18
V
Power Dissipation
PD
Internally limited
Junction Temperature
TJ
+150
°C
Operating Temperature (Note 2)
TOPR
-20 ~ +125
°C
Storage temperature
TSTG
-65 ~ +150
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. This condition is only determined from design. It can't be 100% tested in mass production.
RECOMMENDED OPERATING RATINGS
PARAMETER
Input Voltage
Operating Junction Temperature
SYMBOL
VIN
TJ
RATINGS
15
-20 ~ +125
UNIT
V
°C
SYMBOL
RATINGS
165
180
150
112
54
64
15
50
20
12
UNIT
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
C/W
°C/W
°C/W
°C/W
4
°C/W
THERMAL DATA
PARAMETER
Junction to Ambient
Junction to Case
SOT-223
SOT-89
SOP-8
TO-252/TO-252D
TO-220
TO-262/TO-263
SOT-223
SOT-89
SOP-8
TO-252/TO-252D
TO-220/TO-262
TO-263
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
θJA
θJC
4 of 15
QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(TA=25°C, refer to the test circuits, TJ=0 ~ 125°C, CO=10μF unless otherwise specified)
For LD1117/A-1.2
PARAMETER
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Temperature stability
Long Term Stability
Operating Input Voltage
Quiescent Current
Current Limit
Minimum Load Current
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Thermal Regulation
For LD1117/A-1.5
PARAMETER
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Temperature stability
Long Term Stability
Operating Input Voltage
Quiescent Current
Current Limit
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Thermal Regulation
SYMBOL
TEST CONDITIONS
VOUT VIN=3.2V, IOUT=10mA, TJ=25°C
VIN=2.7 to 8V
VOUT LD1117 : IOUT=10~800mA
LD1117A : IOUT=10~1000mA
VOUT VIN=2.7 to 8V, IOUT=10mA
VIN=2.7V
VOUT LD1117 : IOUT=10~800mA
LD1117A : IOUT=10~1000mA
VOUT
VOUT 1000 hrs, TJ=125°C
VIN
IOUT=100mA
IQ
VIN10V
LD1117
ILIMIT VIN=6.2V, TJ=25°C
LD1117A
IO(MIN) VIN=15V
eN
B=10Hz to 10KHz, TJ=25°C
IOUT=40mA, f=120Hz, TJ=25°C,
SVR
VIN=4.2V, VRIPPLE =1VPP
IOUT=100mA
IOUT=500mA
VD
IOUT=800mA
IOUT=1A
TA=25°C, 30ms Pulse
SYMBOL
TEST CONDITIONS
VOUT VIN=3.5V, IOUT=10mA, TJ=25°C
VIN=3 to 8V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT VIN=3 to 8V, IOUT=0mA
VIN=3V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT
VOUT 1000 hrs, TJ=125°C
VIN
IOUT=100mA
IQ
VIN10V
LD1117
ILIMIT VIN=6.5V, TJ=25°C
LD1117A
eN
B=10Hz to 10KHz, TJ=25°C
IOUT=40mA, f=120Hz, TJ=25°C,
SVR
VIN=4.5V, VRIPPLE=1VPP
IOUT=100mA
IOUT=500mA
VD
IOUT=800mA
IOUT=1A
TA=25°C, 30ms Pulse
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN.
1.176
TYP.
1.200
MAX.
1.224
UNIT
V
1.176
1.200
1.224
V
1
6
mV
1
10
mV
15
10
%
%
V
mA
0.5
0.3
5
800
1000
mA
2
100
60
5
75
mA
V
dB
1.00
1.15
1.20
1.20
0.01
1.10
1.25
1.30
1.30
0.10
%/W
MIN
1.470
TYP
1.500
MAX
1.530
UNIT
V
1.470
1.500
1.530
V
1
6
mV
1
10
mV
15
10
%
%
V
mA
0.5
0.3
5
800
1000
60
V
mA
100
V
75
dB
1.00
1.15
1.20
1.20
0.01
1.10
1.25
1.30
1.30
0.10
V
%/W
5 of 15
QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For LD1117/A-1.8
PARAMETER
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Temperature stability
Long Term Stability
Operating Input Voltage
Quiescent Current
Current Limit
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Thermal Regulation
For LD1117/A-2.5
PARAMETER
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Temperature stability
Long Term Stability
Operating Input Voltage
Quiescent Current
Current Limit
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Thermal Regulation
SYMBOL
TEST CONDITIONS
VOUT VIN=3.8V, IOUT=10mA, TJ=25°C
VIN=3.3 to 8V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT VIN=3.3 to 8V, IOUT=0mA
VIN=3.3V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT
VOUT 1000 hrs, TJ=125°C
VIN
IOUT=100mA
IQ
VIN10V
LD1117
ILIMIT VIN=6.8V, TJ=25°C
LD1117A
eN
B=10Hz to 10KHz, TJ=25°C
IOUT=40mA, f=120Hz, TJ=25°C,
SVR
VIN=5.5V, VRIPPLE=1VPP
IOUT=100mA
IOUT=500mA
VD
IOUT=800mA
IOUT=1A
TA=25°C, 30ms Pulse
SYMBOL
TEST CONDITIONS
VOUT VIN=4.5V, IOUT=10mA, TJ=25°C
VIN=3.9 to 10V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT VIN=3.9 to 10V, IOUT=0mA
VIN=3.9V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT
VOUT 1000 hrs, TJ=125°C
VIN
IOUT=100mA
IQ
VIN10V
LD1117
ILIMIT VIN=7.5V, TJ=25°C
LD1117A
eN
B=10Hz to 10KHz, TJ=25°C
IOUT=40mA, f=120Hz, TJ=25°C,
SVR
VIN=5.5V, VRIPPLE =1VPP
IOUT=100mA
IOUT=500mA
VD
IOUT=800mA
IOUT=1A
TA=25°C, 30ms Pulse
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN.
1.764
TYP.
1.800
MAX.
1.836
UNIT
V
1.764
1.800
1.836
V
1
6
mV
1
10
mV
15
10
%
%
V
mA
0.5
0.3
5
800
1000
60
mA
100
V
75
dB
1.00
1.15
1.20
1.20
0.01
1.10
1.25
1.30
1.30
0.10
%/W
MIN.
2.450
TYP.
2.500
MAX.
2.550
UNIT
V
2.450
2.500
2.550
V
1
6
mV
1
10
mV
15
10
%
%
V
mA
0.5
0.3
5
800
1000
60
V
mA
100
V
75
dB
1.00
1.15
1.20
1.20
0.01
1.10
1.25
1.30
1.30
0.10
V
%/W
6 of 15
QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For LD1117/A-2.85
PARAMETER
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Temperature stability
Long Term Stability
Operating Input Voltage
Quiescent Current
Current Limit
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Thermal Regulation
For LD1117/A-3.0
PARAMETER
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Temperature stability
Long Term Stability
Operating Input Voltage
Quiescent Current
Current Limit
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Thermal Regulation
SYMBOL
TEST CONDITIONS
VOUT VIN=4.85V, IOUT=10mA, TJ=25°C
VIN=4.25 to 10V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT VIN=4.25 to 10V, IOUT=0mA
VIN=4.25V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT
VOUT 1000 hrs, TJ=125°C
VIN
IOUT=100mA
IQ
VIN10V
LD1117
ILIMIT VIN=7.85V, TJ=25°C
LD1117A
eN
B=10Hz to 10KHz, TJ=25°C
IOUT=40mA, f=120Hz, TJ=25°C,
SVR
VIN=5.85V, VRIPPLE=1VPP
IOUT=100mA
IOUT=500mA
VD
IOUT=800mA
IOUT=1A
TA=25°C, 30ms Pulse
SYMBOL
TEST CONDITIONS
VOUT VIN=5V, IOUT=10mA, TJ=25°C
VIN=4.5 to 10V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT VIN=4.5 to 12V, IOUT=0mA
VIN=4.5V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT
VOUT 1000 hrs, TJ=125°C
VIN
IOUT=100mA
IQ
VIN15V
LD1117
ILIMIT VIN=8V, TJ=25°C
LD1117A
eN
B=10Hz to 10KHz, TJ=25C
IOUT=40mA, f=120Hz, TJ=25°C,
SVR
VIN=6V, VRIPPLE=1VPP
IOUT=100mA
IOUT=500mA
VD
IOUT=800mA
IOUT=1A
TA=25°C, 30ms Pulse
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
2.793
TYP
2.850
MAX
2.907
UNIT
V
2.793
2.850
2.907
V
1
6
mV
1
10
mV
15
10
%
%
V
mA
0.5
0.3
5
800
1000
60
mA
100
V
75
dB
1.00
1.15
1.20
1.20
0.01
1.10
1.25
1.30
1.30
0.10
%/W
MIN.
2.940
TYP.
3.000
MAX.
3.060
UNIT
V
2.940
3.000
3.060
V
1
6
mV
1
10
mV
15
10
%
%
V
mA
0.5
0.3
5
800
1000
60
V
mA
100
V
75
dB
1.00
1.15
1.20
1.20
0.01
1.10
1.25
1.30
1.30
0.10
V
%/W
7 of 15
QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For LD1117/A-3.3
PARAMETER
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Temperature stability
Long Term Stability
Operating Input Voltage
Quiescent Current
Current Limit
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Thermal Regulation
For LD1117/A-3.6
PARAMETER
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Temperature stability
Long Term Stability
Operating Input Voltage
Quiescent Current
Current Limit
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Thermal Regulation
SYMBOL
TEST CONDITIONS
VOUT VIN=5.3V, IOUT=10mA, TJ=25°C
VIN=4.75 to 10V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT VIN=4.75 to 15V, IOUT=0mA
VIN=4.75V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT
VOUT 1000 hrs, TJ=125°C
VIN
IOUT=100mA
IQ
VIN15V
LD1117
ILIMIT VIN=8.3V, TJ=25°C
LD1117A
eN
B=10Hz to 10KHz, TJ=25°C
IOUT=40mA, f=120Hz, TJ=25°C,
SVR
VIN=6.3V, VRIPPLE=1VPP
IOUT=100mA
IOUT=500mA
VD
IOUT=800mA
IOUT=1A
TA=25°C, 30ms Pulse
SYMBOL
TEST CONDITIONS
VOUT VIN=5.6V, IOUT=10mA, TJ=25°C
VIN=5 to 10V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT VIN=5 to 15V, IOUT=0mA
VIN=5V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT
VOUT 1000 hrs, TJ=125°C
VIN
IOUT=100mA
IQ
VIN15V
LD1117
ILIMIT VIN=8.6V, TJ=25°C
LD1117A
eN
B=10Hz to 10KHz, TJ=25°C
IOUT=40mA, f=120Hz, TJ=25°C,
SVR
VIN=6.6V, VRIPPLE=1VPP
IOUT=100mA
IOUT=500mA
VD
IOUT=800mA
IOUT=1A
TA=25°C, 30ms Pulse
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN.
3.234
TYP.
3.300
MAX.
3.366
UNIT
V
3.234
3.300
3.366
V
1
6
mV
1
10
mV
15
10
%
%
V
mA
0.5
0.3
5
800
1000
60
mA
100
V
75
dB
1.00
1.15
1.20
1.20
0.01
1.10
1.25
1.30
1.30
0.10
%/W
MIN.
3.528
TYP.
3.600
MAX.
3.672
UNIT
V
3.528
3.600
3.672
V
1
6
mV
1
10
mV
15
10
%
%
V
mA
0.5
0.3
5
800
1000
60
V
mA
100
V
75
dB
1.00
1.15
1.20
1.20
0.01
1.10
1.25
1.30
1.30
0.10
V
%/W
8 of 15
QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
For LD1117/A-5.0
PARAMETER
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Temperature stability
Long Term Stability
Operating Input Voltage
Quiescent Current
Current Limit
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Thermal Regulation
SYMBOL
TEST CONDITIONS
VOUT VIN=7V, IOUT=10mA, TJ=25°C
VIN=6.5 to 15V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1.0A
VOUT VIN=6.5 to 15V, IOUT=0mA
VIN=6.5V
VOUT LD1117 : IOUT=0~800mA
LD1117A : IOUT=0~1000mA
VOUT
VOUT 1000 hrs, TJ=125°C
VIN
IOUT=100mA
IQ
VIN15V
LD1117
ILIMIT VIN=10V, TJ=25°C
LD1117A
eN
B=10Hz to 10KHz, TJ=25°C
IOUT=40mA, f=120Hz, TJ=25°C,
SVR
VIN=8V, VRIPPLE=1VPP
IOUT=100mA
IOUT=500mA
VD
IOUT=800mA
IOUT=1A
TA=25°C, 30ms Pulse
For LD1117/A-ADJ
PARAMETER
Reference Voltage
SYMBOL
TEST CONDITIONS
VREF VIN-VOUT=2V, IOUT=10mA, TJ=25°C
VIN-VOUT=1.4 to 10V
Reference Voltage
VREF LD1117 : IOUT=10~800mA
LD1117A : IOUT=10~1000mA
Line Regulation
VOUT VIN-VOUT=1.5 to 13.75V, IOUT=10mA
VIN-VOUT=3V
Load Regulation
VOUT LD1117 : IOUT=10~800mA
LD1117A : IOUT=10~1000mA
Temperature stability
VOUT
Long Term Stability
VOUT 1000 hrs, TJ=125°C
Operating Input Voltage
VIN
Adjustment Pin Current
IADJ
VIN15V
VIN-VOUT=1.4 to 10V,
Adjustment Pin Current Change
IADJ LD1117 : IOUT=10 ~ 800mA
LD1117A : IOUT=10 ~ 1000mA
Minimum Load Current
IO(MIN) VIN=15V
LD1117
Current Limit
ILIMIT VIN-VOUT=5V, TJ=25°C
LD1117A
Output Noise (%VO)
eN
B=10Hz to 10KHz, TJ=25°C
IOUT=40mA, f=120Hz, TJ=25°C,
Supply Voltage Rejection
SVR
VIN-VOUT=3V, VRIPPLE=1VPP
IOUT=100mA
IOUT=500mA
Dropout Voltage
VD
IOUT=800mA
IOUT=1A
Thermal Regulation
TA=25°C, 30ms Pulse
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN.
4.900
TYP.
5.000
MAX.
5.100
UNIT
V
4.900
5.000
5.100
V
1
10
mV
1
15
mV
15
10
%
%
V
mA
0.5
0.3
5
800
1000
60
mA
100
V
75
dB
1.00
1.15
1.20
1.20
0.01
1.10
1.25
1.30
1.30
0.10
%/W
MIN
1.225
TYP
1.25
MAX
1.275
UNIT
V
1.225
1.25
1.275
V
0.035
0.2
%
0.1
0.4
%
60
15
120
%
%
V
A
1
5
A
2
5
mA
0.50
0.3
800
1000
60
V
mA
0.003
%
75
dB
1.00
1.15
1.20
1.20
0.01
1.10
1.25
1.30
1.30
0.10
V
%/W
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QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATIONS
UTC LD1117/A-XX
VIN
+
IN
OUT
+
GND/ADJ
10µF
VOUT
100µF
Fig.1 Tyncal Application Circuit
UTC LD1117/A-XX
VIN
IN
10µF
OUT
GND/ADJ
VOUT
10µF
Fig.2 Tyncal Application Circuit (FOR MLCC)
Fig.3 Negative Supply
UNISONIC TECHNOLOGIES CO., LTD
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10 of 15
QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATIONS(Cont.)
110
110
UTC LD1117/A2.85V
OUT
IN
+
4.75V
to
5.25V
GND/ADJ
110
+
18-27
Lines
22µF
10µF
110
Fig.4 Active Terminator for SCSI-2 BUS
Fig.5 Circuit for Increasing Output Voltage
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
11 of 15
QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
APPLICATION NOTE of LD1117/A ADJUSTABLE
The LD1117/A adjustable has a reference voltage of between the OUT and ADJ/GND pins. IADJ is 60µA typ.
(120µA max.) and IADJ is 1μA typ. (5µA max.).
R1 is normally fixed to 120Ω.
From figure 6 we obtain:
VOUT=VREF+R2(IADJ+IR1)=VREF + R2(IADJ+VREF/R1)=VREF(1+R2/R1) + R2 x IADJ.
Usually R2 value is in the range of few KΩ, so the R2 X IADJ product could be neglected; then the above
expression becomes: VOUT=VREF(1+R2/R1)
For better load regulation, realize a good Kelvin connection of R1 and R2 is important. Particularly R1
connection must be realized very close to OUT and ADJ/GND pin, while R2 ground connection must be placed
as near as possible to the negative Load pin. Ripple rejection can be improved by introducing a 10μF
electrolytic capacitor placed in parallel to the R2 resistor (See Fig. 8)
Fig.6 Adjustable Output Voltage Application Circuit
Fig.7 Adjustable Output Voltage Application Circuit
(FOR MLCC)
Fig.8 Adjustable Output Voltage Application with improved Ripple Rejection.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
12 of 15
QW-R102-006.AO
Input Voltage
Change(V)
Load
Current(mA)
Output Voltage
Deviation(mV)
Output Voltage
Deviation(mV)
Ripple Rejection (dB)
Dropout Voltage, VD (V)
LD1117/A
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
QW-R102-006.AO
13 of 15
LD1117/A
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
Load Regulation
Short-Circuit Current
0.16
2.4
Output Voltage Deveiation (%)
Short Circuit Current (A)
2.8
TJ=125°C
2.0
TJ=25°C
1.6
1.2
0.8
0.4
0
0
0.08
0.04
0
-0.04
-0.08
-0.12
-50
10
1.245
3.60
Output Voltage, VOUT(V)
3.65
1.240
1.235
1.230
1.225
1.220
1.215
1.210
25
50
75
Temperature (°C)
100 125
VOUT Set With 1% Resistors
3.55
3.50
3.45
VOUT=3.3V
3.40
3.35
3.30
3.25
3.20
-75 -50 -25
1.205
-75 -50 -25 0 25 50 75 100 125 150 175
Junction Temperature(°C)
0
25 50 75 100 125 150 175
Junction Temperature, TJ(°C)
Maximum Power Dissipation
Output Voltage vs. Temperautre
10
2.05
2.00
Output Voltage, VOUT(V)
8
Power (W)
0
3.70
1.250
TO-263 & TO-252
6
4
SOT-223
2
0
-25
Output Voltage vs. Temperautre
Reference Voltge vs. Temperature
1.255
Reference Voltage, VREF (V)
5
Input/Output Differential (V)
ΔILOAD=1A
0.12
25
45
65
85
105
125
Case Temperature, TC(°C)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
VOUT Set With 1% Resistors
1.95
1.90
1.85
1.80
1.75
1.70
1.65
VOUT=1.8V
1.60
1.55
-75 -50 -25 0 25 50 75 100 125 150 175
Junction Temperature, TJ(°C)
14 of 15
QW-R102-006.AO
LD1117/A
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
2.70
2.65
Output Voltage vs. Temperautre
Safe Operating Area vs. Capacitor ESR
VOUT Set With 1% Resistors
10
2.60
2.55
8
2.50
2.45
6
IO=10mA~1.0A
2.40
2.35
2.30
4
VOUT=2.5V
2.25
2.20
-75 -50 -25 0 25 50 75 100 125 150 175
Junction Temperature, TJ(°C)
2
0
0
2
4
6
8
CO (µF)
10
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R102-006.AO
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