LD1117L-285-AA3-A-R [UTC]

Regulator;
LD1117L-285-AA3-A-R
型号: LD1117L-285-AA3-A-R
厂家: Unisonic Technologies    Unisonic Technologies
描述:

Regulator

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中文:  中文翻译
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UNISONIC TECHNOLOGIES CO.,LTD.  
LD1117/A  
Linear Integrated Circuit  
LOW DROP FIXED AND  
ADJUSTABLE POSITIVE  
VOLTAGE REGULATORS  
1
SOT-223  
TO-220  
TO-263  
SOP-8  
DESCRIPTION  
The UTC LD1117/A is a low dropout, 3-terminals  
1
1
positive voltage regulator designed to provide output current  
up to 800mA/1A, even available in adjustable version  
(Vref=1.25V). Regarding fixed versions, 1.5V, 1.8V, 2.5V,  
2.85V, 3.0V, 3.3V, 3.6V and 5.0V are offered. The 2.85V  
type is ideal for SCSI-2 lines active termination. Various  
surface mount packages optimize the thermal characteristics  
even offering a relevant space saving effect, including  
SOT-223, TO-263, TO-252and SOP-8.  
TO-252  
1
1
TO-263-3  
High efficiency is assured by NPN pass transistor. In  
fact, in the case, unlike than PNP one, the Quiescent Current  
flows mostly into the load. Only a very common 10µF  
minimum capacitor is needed for stability. It allows very tight  
output voltage tolerance within ±1% at 25°C by chip trim.  
Moreover, the ADJUSTABLE version is pin to pin compatible  
with the other standard Adjustable voltage regulators  
maintaining the better performances in terms of Drop and  
Tolerance.  
*Pb-free plating product number:  
- LD1117L-xx  
- LD1117AL-xx  
FEATURES  
*Low dropout voltage (1V Typ.)  
*2.85V device performances are suitable for SCSI-2 active  
termination  
*Output current up to 0.8A/1.0A  
*Adjustable version availability (Vref=1.25V)  
*Internal current and thermal limit.  
*Available in ±1%(at 25°C) and 2% in all temperature range  
*Supply voltage rejection: 75dB (TYP)  
ORDERING INFORMATION  
Order Number  
Package  
Pin Assignment  
Packing  
Normal  
Lead Free Plating  
LD1117-xx-AA3--③  
LD1117-xx-TA3--③  
LD1117-xx-TN3--③  
LD1117-xx-TQ2--③  
LD1117-xx-TQ3--③  
LD1117-xx-S08--③  
LD1117L-xx-AA3--③  
LD1117L-xx-TA3--③  
LD1117L-xx-TN3--③  
LD1117L-xx-TQ2--③  
LD1117L-xx-TQ3--③  
LD1117L-xx-S08--③  
SOT-223  
A: GOI  
TO-220  
B: OGI  
TO-252  
C: GIO  
R: Tape Reel  
T: Tube  
TO-263  
D: IGO  
TO-263-3  
SOP-8  
GOOIxOOx  
Note: 1. : Current code: Blank: 800mA A: 1A  
2. Pin assignment: I:Vin O:Vout G:GND x:NC  
3. xx: Output Voltage, refer to Marking Information.  
Example: LD1117L-285-AA3-B-T  
800mA, 2.85V, SOT-223 package, Pin1:Vout, Pin2:Ground, Pin3:Vin, packing by Tube.  
www.unisonic.com.tw  
1
Copyright © 2005 Unisonic Technologies Co.,LTD.  
QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
MARKING INFORMATION  
PACKAGE  
VOLTAGE CODE  
MARKING  
LD1117  
CURRENT CODE  
VOLTAGE CODE  
PIN CODE  
15 :1.5V  
18 :1.8V  
25 :2.5V  
285 :2.85V  
30 :3.0V  
33 :3.3V  
36 :3.6V  
50 :5.0V  
AD :ADJ  
SOT-223  
DATE CODE  
1
2
3
UTC  
LD1117  
TO-220  
TO-252  
TO-263  
TO-263-3  
CURRENT CODE  
PIN CODE  
VOLTAGE CODE  
DATE CODE  
1
2
3
Note: Current code: Blank: 0.8A  
A: 1A  
PIN CONFIGURATION  
GND  
NC  
1
2
3
4
8
7
6
5
VOUT  
VOUT  
NC  
VOUT  
VOUT  
VIN  
UNISONIC TECHNOLOGIES CO., LTD  
2
www.unisonic.com.tw  
QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
BLOCK DIAGRAM  
ABSOLUTE MAXIMUM RATINGS (Ta=25)  
PARAMETER SYMBOL  
DC Input Voltage  
RATINGS  
15  
UNIT  
V
VIN  
PD  
Power Dissipation  
Internally limited  
125  
Junction Temperature  
Storage temperature  
TJ  
°C  
°C  
TSTG  
-40 ~ +150  
Note: Absolute Maximum Ratings are those value beyond which damage to the device may occur. Functional  
operation under there condition is not implied. Over the above suggested Max Power Dissipation a Short  
Circuit could definitively damage the device.  
UNISONIC TECHNOLOGIES CO., LTD  
3
www.unisonic.com.tw  
QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
ELECTRICAL CHARACTERISTICS  
(Ta=25,refer to the test circuits, Tj=0 to 125°C, Co=10µF unless otherwise specified))  
For LD1117/A-1.5  
PARAMETER  
Output Voltage  
SYMBOL  
Vo  
TEST CONDITIONS  
Vin=3.5V, Io=10mA, TJ=25°C  
Vin=3 to 8V  
MIN.  
TYP.  
MAX.  
1.515  
UNIT  
V
1.485  
1.500  
Output Voltage  
Line Regulation  
Load Regulation  
Vo  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1.0A  
Vin=3 to 8V, Io=0mA  
Vin=3V  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1000mA  
1.470  
1.500  
1.530  
6
V
Vo  
Vo  
1
1
mV  
mV  
10  
Temperature stability  
Long Term Stability  
Operating Input Voltage  
Quiescent Current  
Vo  
Vo  
Vin  
Id  
0.5  
0.3  
%
%
1000 hrs, TJ =125°C  
Io=100mA  
15  
10  
V
Vin10V  
5
mA  
LD1117  
LD1117A 1000  
B=10Hz to 10KHz, TJ =25°C  
800  
Current Limit  
ILIMIT Vin=6.5V, TJ =25°C  
mA  
µV  
dB  
Output Noise Voltage  
Supply Voltage Rejection  
eN  
100  
75  
Io=40mA, f=120Hz, TJ =25°C,  
Vin=4.5V, Vripple=1Vpp  
Io=100mA  
SVR  
60  
1.00  
1.15  
1.20  
1.20  
0.01  
1.10  
1.25  
1.30  
1.30  
0.10  
V
V
V
Io=500mA  
Io=800mA  
Io=1000 mA  
Dropout Voltage  
Vd  
V
Thermal Regulation  
Ta=25°C, 30ms Pulse  
%/W  
For LD1117/A-1.8  
PARAMETER  
SYMBOL  
Vo  
TEST CONDITIONS  
Vin=3.8V, Io=10mA, TJ =25°C  
Vin=3.3 to 8V  
MIN.  
TYP.  
MAX.  
1.820  
UNIT  
V
Output Voltage  
1.780  
1.800  
Output Voltage  
Line Regulation  
Load Regulation  
Vo  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1000mA  
Vin=3.3 to 8V, Io=0mA  
Vin=3.3V  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1000mA  
1.760  
1.800  
1.840  
6
V
Vo  
Vo  
1
1
mV  
mV  
10  
Temperature stability  
Long Term Stability  
Operating Input Voltage  
Quiescent Current  
Vo  
Vo  
Vin  
Id  
0.5  
0.3  
%
%
1000 hrs, TJ =125°C  
Io=100mA  
10  
10  
V
Vin8V  
5
mA  
LD1117  
LD1117A 1000  
B=10Hz to 10KHz, TJ =25°C  
800  
Current Limit  
ILIMIT Vin=6.8V, TJ =25°C  
mA  
µV  
dB  
Output Noise Voltage  
Supply Voltage Rejection  
eN  
100  
75  
Io=40mA, f=120Hz, TJ =25°C,  
Vin=5.5V, Vripple=1Vpp  
Io=100mA  
SVR  
60  
1.00  
1.15  
1.20  
1.20  
0.01  
1.10  
1.25  
1.30  
1.30  
0.10  
V
V
V
Io=500mA  
Io=800mA  
Io=1000 mA  
Dropout Voltage  
Vd  
V
Thermal Regulation  
Ta=25°C, 30ms Pulse  
%/W  
UNISONIC TECHNOLOGIES CO., LTD  
4
www.unisonic.com.tw  
QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
ELECTRICAL CHARACTERISTICS(Cont.)  
For LD1117/A-2.5  
PARAMETER  
SYMBOL  
Vo  
TEST CONDITIONS  
MIN.  
2.475  
2.450  
TYP.  
2.500  
2.500  
MAX.  
2.525  
2.550  
UNIT  
V
1%  
2%  
Output Voltage  
Vin=4.5V, Io=10mA, TJ=25°C  
Vin=3.9 to 10V  
2%  
4%  
2.450  
2.400  
2.500  
2.550  
Output Voltage  
Line Regulation  
Load Regulation  
Vo  
V
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1.0A  
Vin=3.9 to 10V, Io=0mA  
Vin=3.9V  
2.500  
1
2.600  
6
Vo  
Vo  
mV  
mV  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1000mA  
1
10  
Temperature stability  
Long Term Stability  
Operating Input Voltage  
Quiescent Current  
Vo  
Vo  
Vin  
Id  
0.5  
0.3  
%
%
1000 hrs, TJ =125°C  
Io=100mA  
15  
10  
V
Vin10V  
5
mA  
LD1117  
LD1117A  
B=10Hz to 10KHz, TJ =25°C  
Io=40mA, f=120Hz, TJ =25°C,  
Vin=5.5V, Vripple=1Vpp  
Io=100mA  
Io=500mA  
Io=800mA  
Io=1000 mA  
800  
Current Limit  
ILIMIT Vin=7.5V, TJ =25°C  
mA  
µV  
dB  
1000  
Output Noise Voltage  
Supply Voltage Rejection  
eN  
100  
75  
SVR  
60  
1.00  
1.15  
1.20  
1.20  
0.01  
1.10  
1.25  
1.30  
1.30  
0.10  
V
V
V
Dropout Voltage  
Vd  
V
Thermal Regulation  
Ta=25°C, 30ms Pulse  
%/W  
For LD1117/A-2.85  
PARAMETER  
SYMBOL  
Vo  
TEST CONDITIONS  
MIN.  
TYP.  
MAX.  
2.880  
UNIT  
V
Output Voltage  
Vin=4.85V, Io=10mA, TJ =25°C  
2.828  
2.850  
Vin=4.25 to 10V  
Output Voltage  
Line Regulation  
Load Regulation  
Vo  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1.0A  
Vin=4.25 to 10V, Io=0mA  
Vin=4.25V  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1000mA  
2.790  
2.850  
2.910  
6
V
Vo  
Vo  
1
1
mV  
mV  
10  
Temperature stability  
Long Term Stability  
Operating Input Voltage  
Quiescent Current  
Vo  
Vo  
Vin  
Id  
0.5  
0.3  
%
%
1000 hrs, TJ =125°C  
Io=100mA  
15  
10  
V
Vin10V  
5
mA  
LD1117  
LD1117A  
B=10Hz to 10KHz, TJ =25°C  
Io=40mA, f=120Hz, TJ =25°C,  
Vin=5.85V, Vripple=1Vpp  
Io=100mA  
Io=500mA  
Io=800mA  
Io=1000 mA  
800  
Current Limit  
ILIMIT Vin=7.85V, TJ =25°C  
mA  
µV  
dB  
1000  
Output Noise Voltage  
Supply Voltage Rejection  
eN  
100  
75  
SVR  
60  
1.00  
1.15  
1.20  
1.20  
0.01  
1.10  
1.25  
1.30  
1.30  
0.10  
V
V
V
Dropout Voltage  
Vd  
V
Thermal Regulation  
Ta=25°C, 30ms Pulse  
%/W  
UNISONIC TECHNOLOGIES CO., LTD  
5
www.unisonic.com.tw  
QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
ELECTRICAL CHARACTERISTICS(Cont.)  
For LD1117/A-3.0  
PARAMETER  
SYMBOL  
Vo  
TEST CONDITIONS  
MIN.  
2.970  
2.940  
TYP.  
3.000  
3.000  
MAX.  
3.030  
3.060  
UNIT  
V
1%  
2%  
Output Voltage  
Vin=5V, Io=10mA, TJ =25°C  
Vin=4.5 to 10V  
2%  
4%  
2.940  
2.880  
3.000  
3.060  
Output Voltage  
Line Regulation  
Load Regulation  
Vo  
V
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1.0A  
Vin=4.5 to 12V, Io=0mA  
Vin=4.5V  
3.000  
1
3.120  
6
Vo  
Vo  
mV  
mV  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1000mA  
1
10  
Temperature stability  
Long Term Stability  
Operating Input Voltage  
Quiescent Current  
Vo  
Vo  
Vin  
Id  
0.5  
0.3  
%
%
1000 hrs, TJ =125°C  
Io=100mA  
15  
10  
V
Vin10V  
5
mA  
LD1117  
LD1117A  
B=10Hz to 10KHz, TJ =25°C  
Io=40mA, f=120Hz, TJ =25°C,  
Vin=6V, Vripple=1Vpp  
Io=100mA  
Io=500mA  
Io=800mA  
Io=1000 mA  
800  
Current Limit  
ILIMIT Vin=8V, TJ =25°C  
mA  
µV  
dB  
1000  
Output Noise Voltage  
Supply Voltage Rejection  
eN  
100  
75  
SVR  
60  
1.00  
1.15  
1.20  
1.20  
0.01  
1.10  
1.25  
1.30  
1.30  
0.10  
V
V
V
Dropout Voltage  
Vd  
V
Thermal Regulation  
Ta=25°C, 30ms Pulse  
%/W  
For LD1117/A-3.3  
PARAMETER  
SYMBOL  
Vo  
TEST CONDITIONS  
MIN.  
3.267  
3.235  
TYP.  
3.300  
3.300  
MAX.  
3.333  
3.365  
UNIT  
V
1%  
2%  
Output Voltage  
Vin=5.3V, Io=10mA, TJ=25°C  
Vin=4.75 to 10V  
2%  
4%  
3.235  
3.160  
3.300  
3.365  
Output Voltage  
Line Regulation  
Load Regulation  
Vo  
V
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1.0A  
Vin=4.75 to 15V, Io=0mA  
Vin=4.75V  
3.300  
1
3.440  
6
Vo  
Vo  
mV  
mV  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1000mA  
1
10  
Temperature stability  
Long Term Stability  
Operating Input Voltage  
Quiescent Current  
Vo  
Vo  
Vin  
Id  
0.5  
0.3  
%
%
1000 hrs, TJ =125°C  
Io=100mA  
15  
10  
V
Vin15V  
5
mA  
LD1117  
LD1117A  
B=10Hz to 10KHz, TJ =25°C  
Io=40mA, f=120Hz, TJ =25°C,  
Vin=6.3V, Vripple=1Vpp  
Io=100mA  
Io=500mA  
Io=800mA  
Io=1000 mA  
800  
Current Limit  
ILIMIT Vin=8.3V, TJ =25°C  
mA  
µV  
dB  
1000  
Output Noise Voltage  
Supply Voltage Rejection  
eN  
100  
75  
SVR  
60  
1.00  
1.15  
1.20  
1.20  
0.01  
1.10  
1.25  
1.30  
1.30  
0.10  
V
V
V
Dropout Voltage  
Vd  
V
Thermal Regulation  
Ta=25°C, 30ms Pulse  
%/W  
UNISONIC TECHNOLOGIES CO., LTD  
6
www.unisonic.com.tw  
QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
ELECTRICAL CHARACTERISTICS(Cont.)  
For LD1117/A-3.6  
PARAMETER  
SYMBOL  
Vo  
TEST CONDITIONS  
MIN.  
TYP.  
MAX.  
3.636  
UNIT  
V
3.564  
3.600  
Output Voltage  
Vin=5.6V, Io=10mA, TJ =25°C  
Vin=5 to 10V  
3.528  
3.600  
3.672  
6
Output Voltage  
Line Regulation  
Load Regulation  
Vo  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1.0A  
Vin=5 to 15V, Io=0mA  
Vin=5V  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1000mA  
V
Vo  
Vo  
1
1
mV  
mV  
10  
Temperature stability  
Long Term Stability  
Operating Input Voltage  
Quiescent Current  
Vo  
Vo  
Vin  
Id  
0.5  
0.3  
%
%
1000 hrs, TJ =125°C  
Io=100mA  
15  
10  
V
Vin15V  
5
mA  
LD1117  
LD1117A  
B=10Hz to 10KHz, TJ =25°C  
Io=40mA, f=120Hz, TJ =25°C,  
Vin=6.6V, Vripple=1Vpp  
Io=100mA  
Io=500mA  
Io=800mA  
Io=1000 mA  
800  
Current Limit  
ILIMIT Vin=8.6V, Tj=25°C  
mA  
µV  
dB  
1000  
Output Noise Voltage  
Supply Voltage Rejection  
eN  
100  
75  
SVR  
60  
1.00  
1.15  
1.20  
1.20  
0.01  
1.10  
1.25  
1.30  
1.30  
0.10  
V
V
V
Dropout Voltage  
Vd  
V
Thermal Regulation  
Ta=25°C, 30ms Pulse  
%/W  
For LD1117/A-5.0  
PARAMETER  
SYMBOL  
Vo  
TEST CONDITIONS  
MIN.  
4.950  
4.900  
TYP.  
5.000  
5.000  
MAX.  
5.050  
5.100  
UNIT  
V
1%  
2%  
Output Voltage  
Vin=7V, Io=10mA, TJ =25°C  
Vin=6.5 to 15V  
2%  
4%  
4.900  
4.800  
5.000  
5.100  
Output Voltage  
Line Regulation  
Load Regulation  
Vo  
V
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1.0A  
Vin=6.5 to 15V, Io=0mA  
Vin=6.5V  
5.000  
1
5.200  
6
Vo  
Vo  
mV  
mV  
LD1117 : Io=0 ~ 800mA  
LD1117A : Io=0 ~ 1000mA  
1
10  
Temperature stability  
Long Term Stability  
Operating Input Voltage  
Quiescent Current  
Vo  
Vo  
Vin  
Id  
0.5  
0.3  
%
%
1000 hrs, TJ =125°C  
Io=100mA  
15  
10  
V
Vin15V  
5
mA  
LD1117  
LD1117A  
B=10Hz to 10KHz, TJ =25°C  
Io=40mA, f=120Hz, TJ =25°C,  
Vin=8V, Vripple=1Vpp  
Io=100mA  
Io=500mA  
Io=800mA  
Io=1000 mA  
800  
Current Limit  
ILIMIT Vin=10V, TJ =25°C  
mA  
µV  
dB  
1000  
Output Noise Voltage  
Supply Voltage Rejection  
eN  
100  
75  
SVR  
60  
1.00  
1.15  
1.20  
1.20  
0.01  
1.10  
1.25  
1.30  
1.30  
0.10  
V
V
V
Dropout Voltage  
Vd  
V
Thermal Regulation  
Ta=25°C, 30ms Pulse  
%/W  
UNISONIC TECHNOLOGIES CO., LTD  
7
www.unisonic.com.tw  
QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
ELECTRICAL CHARACTERISTICS(Cont.)  
For LD1117/A-ADJUSTABLE  
PARAMETER  
Reference Voltage  
Reference Voltage  
SYMBOL  
TEST CONDITIONS  
Vin-Vout=2V, Io=10mA, TJ =25°C  
Vin-Vout=1.4 to 10V  
LD1117 : Io=10 ~ 800mA  
LD1117A : Io=10 ~ 1000mA  
Vin-Vout=1.5 to 13.75V, Io=10mA  
Vin-Vout=3V  
MIN.  
TYP.  
1.25  
MAX.  
1.262  
UNIT  
V
Vref  
Vref  
Vo  
Vo  
1.238  
1.225  
1.275  
0.200  
0.400  
V
%
%
Line Regulation  
Load Regulation  
0.035  
0.10  
LD1117 : Io=10 ~ 800mA  
LD1117A : Io=10 ~ 1000mA  
Temperature stability  
Long Term Stability  
Operating Input Voltage  
Adjustment Pin Current  
Adjustment Pin Current  
Change  
Vo  
Vo  
Vin  
0.50  
0.3  
%
%
V
1000 hrs, TJ =125°C  
15  
Iadj  
Vin15V  
Vin-Vout=1.4 to 10V,  
60  
1
120  
µA  
Iadj LD1117 : Io=10 ~ 800mA  
LD1117A : Io=10 ~ 1000mA  
Io(min) Vin=15V  
5
5
µA  
Minimum Load Current  
Current Limit  
2
mA  
mA  
%
LD1117  
800  
ILIMIT Vin-Vout=5V, TJ =25°C  
LD1117A 1000  
Output Noise (%Vo)  
eN  
B=10Hz to 10KHz, TJ =25°C  
0.003  
75  
Supply Voltage Rejection  
Io=40mA, f=120Hz, TJ =25°C,  
Vin-Vo=3V, Vripple=1Vpp  
Io=100mA  
Io=500mA  
Io=800mA  
SVR  
60  
dB  
Dropout Voltage  
1.00  
1.15  
1.20  
1.20  
0.01  
1.10  
1.25  
1.30  
1.30  
0.10  
V
V
V
Vd  
Io=1000mA  
V
Thermal Regulation  
Ta=25°C, 30ms Pulse  
%/W  
THERMAL DATA  
PARAMETER  
SYMBOL  
RATINGS  
UNIT  
SOT-223  
SOP-8  
15  
20  
12  
4
ΘJC  
Thermal Resistance Junction-Case  
°C/W  
TO-252  
TO-220  
TO-263  
SOT-223  
SOP-8  
4
165  
150  
112  
54  
64  
ΘJA  
Thermal Resistance Junction-Ambient  
TO-252  
TO-220  
TO-263  
°C/W  
UNISONIC TECHNOLOGIES CO., LTD  
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QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
TYPICAL APPLICATIONS  
FIG.1 Negative Supply  
FIG.2 Active Terminator for SCSI-2 BUS  
FIG.3 Circuit for Increasing Output Voltage  
UNISONIC TECHNOLOGIES CO., LTD  
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QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
TYPICAL APPLICATIONS(Cont.)  
FIG.4 Voltage Regulator With Reference  
FIG.5 Battery Backed-up Regulated Supply  
UNISONIC TECHNOLOGIES CO., LTD  
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QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
TYPICAL APPLICATIONS(Cont.)  
FEEDBACK PATH  
FIG.6 Post-Regulated Dual Supply  
UNISONIC TECHNOLOGIES CO., LTD  
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QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
APPLICATION NOTE of LD1117/A ADJUSTABLE  
The LD1117/A ADJUSTABLE has a thermal stabilized 1.25±0.012V reference voltage between the OUT and  
ADJ pins.  
R1 is normally fixed to 120. From figure 7 we obtain:  
OUT=VREF+R2(IADJ + IR1)=VREF + R2(IADJ + VREF / R1)=VREF(1+R2/R1) + R2 x IADJ  
IADJ is 60µA typ. (120µA max.) and IADJ is 1µA typ. (5µA max.).  
V
.
In normal application R2 value is in the range of few Kohm,, so the R2 X IADJ product could not be considered  
in the VOUT calculation; then the above expression becomes: VOUT=VREF(1+R2/R1)  
In order to have the better load regulation it is important to realize a good Kelvin connection of R1 and R2  
resistors. In particular R1 connection must be realized very close to OUT and ADJ 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.7 Adjustable Output Voltage Application Circuit  
FIG.8 Adjustable Output Voltage Application with improved Ripple Rejection.  
UNISONIC TECHNOLOGIES CO., LTD  
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QW-R102-006,M  
LD1117/A  
Linear Integrated Circuit  
TYPICAL PERFORMANCE CHARACTERISTICS  
Fig.2 Output Voltage vs.  
Fig.1 Reference Voltge vs.  
Temperature  
Temperautre  
OUT SET WITH 1% RESISTORS  
Vout=3.6V  
1.250  
1.245  
1.240  
1.235  
1.230  
1.225  
1.220  
1.215  
3.70  
3.65  
3.60  
3.55  
3.50  
3.45  
3.40  
V
3.35  
3.30  
Vout=3.3V  
1.210  
1.205  
1.200  
3.25  
3.20  
Note: LD1117 Only  
-75 -50 -25  
0
25 50 75 100 125 150 175  
-75 -50 -25  
0
25 50 75 100 125 150 175  
Junction Temperature(°C)  
Junction Temperature(°C)  
Fig.3 Maximum Power Dissipation  
10  
8
TO-263 & TO-252  
6
4
SOT-223  
2
0
25  
45  
65  
85  
105  
125  
Case Temperature(°C)  
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  
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QW-R102-006,M