LD1117AS25TR中文资料
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October 2004
s
LOW DROPOUT VOLTAGE
(1.15V TYP . @ I OUT = 1A, 25°C)
s
VERY LOW QUIESCENT CURRENT (5 mA TYP. @ 25°C)
s OUTPUT CURRENT UP TO 1A
s
FIXED OUTPUT VOLTAGE OF: 1.2V, 1.8V, 2.5V, 2.85V, 3.3V, 5.0V
s
ADJUSTABLE VERSION AVAILABILITY (V rel = 1.25V)
s INTERNAL CURRENT AND THERMAL LIMIT s ONLY 10 μF FOR STABILITY
s
AVAILABLE IN ± 2% (AT 25°C) AND 4% IN FULL TEMPERATURE RANGE
s
HIGH SUPPLY VOLTAGE REJECTION:(80dB TYP. AT 25°C)
s
TEMPERATURE RANGE: 0°C TO 125°C
DESCRIPTION
The LD1117A is a LOW DROP Voltage Regulator able to provide up to 1A of Output Current,available even in adjustable version (Vref=1.25V).Concerning fixed versions, are offered the following Output Voltages: 1.2V, 1.8V, 2.5V,2.85V, 3.3V and 5.0V. The 2.85V type is ideal for SCSI-2 lines active termination. The device is supplied in: SOT-223, DPAK and TO-220. The surface mount packages optimize the thermal characteristics even offering a relevant space saving effect. High efficiency is assured by NPN pass transistor. Only a very common 10μF minimum capacitor is needed for stability. Only chip trimming allows the regulator to reach a very tight output voltage tolerance, within ± 2% at 25°C.
LD1117A SERIES
LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
LD1117A SERIES
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Table 1: Absolute Maximum Ratings
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Over the above suggested Max Power Dissipation a Short Circuit could definitively damage the device.
Table 2: Thermal Data
Figure 2: Pin Connection (top view)
NOTE: The TAB is connected to the V OUT .
Table 3: Order Codes
Symbol Parameter
Value Unit V IN DC Input Voltage 10V P tot Power Dissipation
12W T stg Storage Temperature Range
-40 to +150°C T op
Operating Junction Temperature Range
0 to +125
°C
Symbol Parameter
TO-220SOT-223DPAK Unit R thj-case Thermal Resistance Junction-case 315
8
°C/W R thj-amb
Thermal Resistance Junction-ambient
50
°C/W
SOT-223DPAK TO-220OUTPUT VOLTAGE LD1117AS12TR LD1117ADT12TR LD1117AV12 1.2 V LD1117AS18TR LD1117ADT18TR LD1117AV18 1.8 V LD1117AS25TR LD1117ADT25TR LD1117AV25 2.5 V
LD1117AS28TR LD1117ADT28TR LD1117AV28 2.85 V LD1117AS33TR LD1117ADT33TR LD1117AV33 3.3 V LD1117AS50TR LD1117ADT50TR LD1117AV50 5 V
LD1117AST-R
LD1117ADT-R
LD1117AV
ADJUSTABLE FROM 1.25
TO 15 V
LD1117A SERIES
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Figure 3: Application Circuit (For Other Fixed Output Voltages)
Table 4: Electrical Characteristics Of LD1117A#12 (refer to the test circuits, T J = 0 to 125°C, C O = 10 μF, C I = 10 μF, R = 120 ? between OUT-GND, unless otherwise specified)
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V O Output Voltage V I = 5.3 V I O = 10 mA
T J = 25°C
1.176 1.2 1.224V V O Output Voltage I O = 0 to 1 A V I =
2.75 to 10 V 1.152
1.2 1.248V ?V O Line Regulation V I =
2.75 to 8 V I O = 0 mA 16mV ?V O Load Regulation V I = 2.75 V
I O = 0 to 1 A
110
mV ?V O Temperature Stability 0.5%?V O Long Term Stability 1000 hrs, T J = 125°C 0.3
%V I Operating Input Voltage I O = 100 mA 10V I d Quiescent Current V I ≤ 8 V
I O = 0 mA
510mA I O Output Current V I - V O = 5 VT J = 25°C 1000
1200mA eN Output Noise Voltage B =10Hz to 10KHz T J = 25°C
100μV SVR Supply Voltage Rejection I O = 40 mA f = 120Hz
V I - V O = 3 VV ripple = 1 V PP 60
80dB V D
Dropout Voltage
I O = 100 mA 1 1.10V
I O = 500 mA 1.05 1.15I O = 1 A
1.15 1.30?V O(pwr)Thermal Regulation
T a = 25°C 30ms Pulse 0.08
0.2
%/W
LD1117A SERIES
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Table 5: Electrical Characteristics Of LD1117A#18 (refer to the test circuits, T J = 0 to 125°C,C O = 10 μF, C I = 10 μF unless otherwise specified)
Table 6: Electrical Characteristics Of LD1117A#25 (refer to the test circuits, T J = 0 to 125°C,C O = 10 μF, C I = 10 μF unless otherwise specified)
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V O Output Voltage V I = 3.8 V I O = 10 mA
T J = 25°C
1.764 1.8
1.836V V O Output Voltage I O = 0 to 1 A V I = 3.3 to 8 V 1.728
1.872V ?V O Line Regulation V I = 3.3 to 8 V I O = 0 mA 16mV ?V O Load Regulation V I = 3.3 V
I O = 0 to 1 A
110
mV ?V O Temperature Stability 0.5%?V O Long Term Stability 1000 hrs, T J = 125°C 0.3
%V I Operating Input Voltage I O = 100 mA 10V I d Quiescent Current V I ≤ 8 V
I O = 0 mA
5
10
mA I O Output Current V I - V O = 5 VT J = 25°C 1000
mA eN Output Noise Voltage B =10Hz to 10KHz T J = 25°C
100μV SVR Supply Voltage Rejection I O = 40 mA f = 120Hz
V I - V O = 3 VV ripple = 1 V PP 60
80dB V D
Dropout Voltage
I O = 100 mA 1 1.10V
I O = 500 mA 1.05 1.15I O = 1 A
1.15 1.30?V O(pwr)Thermal Regulation
T a = 25°C 30ms Pulse 0.08
0.2
%/W
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V O Output Voltage V I = 4.5 V I O = 10 mA
T J = 25°C
2.45 2.5
2.55V V O Output Voltage I O = 0 to 1 A V I =
3.9 to 8 V 2.4
2.6V ?V O Line Regulation V I =
3.9 to 8 V I O = 0 mA 16mV ?V O Load Regulation V I = 3.9 V
I O = 0 to 1 A
110
mV ?V O Temperature Stability 0.5%?V O Long Term Stability 1000 hrs, T J = 125°C 0.3
%V I Operating Input Voltage I O = 100 mA 10V I d Quiescent Current V I ≤ 10 V
I O = 0 mA
510
mA I O Output Current V I - V O = 5 VT J = 25°C 1000
1200mA eN Output Noise Voltage B =10Hz to 10KHz T J = 25°C
100μV SVR Supply Voltage Rejection I O = 40 mA f = 120Hz
V I - V O = 3 VV ripple = 1 V PP 60
80dB V D
Dropout Voltage
I O = 100 mA 1 1.10V
I O = 500 mA 1.05 1.15I O = 1 A
1.15 1.30?V O(pwr)Thermal Regulation
T a = 25°C 30ms Pulse 0.08
0.2
%/W
LD1117A SERIES
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Table 7: Electrical Characteristics Of LD1117A#28 (refer to the test circuits, T J = 0 to 125°C,C O = 10 μF, C I = 10 μF unless otherwise specified)
Table 8: Electrical Characteristics Of LD1117A#33 (refer to the test circuits, T J = 0 to 125°C,C O = 10 μF, C I = 10 μF unless otherwise specified)
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V O Output Voltage V I = 4.85 V I O = 10 mA
T J = 25°C
2.793 2.85
2.907V V O Output Voltage I O = 0 to 1 A V I = 4.25 to 10 V 2.736
2.964V ?V O Line Regulation V I = 4.25 to 8 V I O = 0 mA 16mV ?V O Load Regulation V I = 4.25 V
I O = 0 to 1 A
110
mV ?V O Temperature Stability 0.5%?V O Long Term Stability 1000 hrs, T J = 125°C 0.3
%V I Operating Input Voltage I O = 100 mA 10V I d Quiescent Current V I ≤ 10 V
I O = 0 mA
4.510
mA I O Output Current V I - V O = 5 VT J = 25°C 1000
1200mA eN Output Noise Voltage B =10Hz to 10KHz T J = 25°C
100μV SVR Supply Voltage Rejection I O = 40 mA f = 120Hz
V I - V O = 3 VV ripple = 1 V PP 60
75dB V D
Dropout Voltage
I O = 100 mA 1 1.10V
I O = 500 mA 1.05 1.15I O = 1 A
1.15 1.30?V O(pwr)Thermal Regulation
T a = 25°C 30ms Pulse 0.08
0.2
%/W
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V O Output Voltage V I = 5.3 V I O = 10 mA
T J = 25°C
3.234 3.3
3.366V V O Output Voltage I O = 0 to 1 A V I =
4.75 to 10 V 3.168
3.432V ?V O Line Regulation V I =
4.75 to 8 V I O = 0 mA 16mV ?V O Load Regulation V I = 4.75 V
I O = 0 to 1 A
110
mV ?V O Temperature Stability 0.5%?V O Long Term Stability 1000 hrs, T J = 125°C 0.3
%V I Operating Input Voltage I O = 100 mA 10V I d Quiescent Current V I ≤ 10 V
I O = 0 mA
510
mA I O Output Current V I - V O = 5 VT J = 25°C 1000
1200mA eN Output Noise Voltage B =10Hz to 10KHz T J = 25°C
100μV SVR Supply Voltage Rejection I O = 40 mA f = 120Hz
V I - V O = 3 VV ripple = 1 V PP 60
75dB V D
Dropout Voltage
I O = 100 mA 1 1.10V
I O = 500 mA 1.05 1.15I O = 1 A
1.15 1.30?V O(pwr)Thermal Regulation
T a = 25°C 30ms Pulse 0.08
0.2
%/W
LD1117A SERIES
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Table 9: Electrical Characteristics Of LD1117A#50 (refer to the test circuits, T J = 0 to 125°C,C O = 10 μF, C I = 10 μF unless otherwise specified)
Table 10: Electrical Characteristics Of LD1117A (Adjustable) (refer to the test circuits, T J = 0 to 125°C, C O = 10 μF, C I = 10 μF unless otherwise specified)
Symbol Parameter
Test Conditions Min.Typ.Max.Unit V O Output Voltage V I = 7 V I O = 10 mA
T J = 25°C
4.95
5.1V V O Output Voltage I O = 0 to 1 A V I =
6.4 to 10 V 4.8
5.2V ?V O Line Regulation V I =
6.4 to 8 V I O = 0 mA 16mV ?V O Load Regulation V I = 6.4 V
I O = 0 to 1 A
110
mV ?V O Temperature Stability 0.5%?V O Long Term Stability 1000 hrs, T J = 125°C 0.3
%V I Operating Input Voltage I O = 100 mA 10V I d Quiescent Current V I ≤ 10 V
I O = 0 mA
510
mA I O Output Current V I - V O = 5 VT J = 25°C 1000
1200mA eN Output Noise Voltage B =10Hz to 10KHz T J = 25°C
100μV SVR Supply Voltage Rejection I O = 40 mA f = 120Hz
V I - V O = 3 VV ripple = 1 V PP 60
80dB V D
Dropout Voltage
I O = 100 mA 1 1.10V
I O = 500 mA 1.05 1.15I O = 1 A
1.15 1.30?V O(pwr)Thermal Regulation
T a = 25°C 30ms Pulse 0.08
0.2
%/W
Symbol Parameter
Test Conditions
Min.Typ.Max.Unit V O Output Voltage V I = 5.3 V I O = 10 mA
T J = 25°C
1.225 1.25
1.275V V O Output Voltage I O = 0 to 1 A V I =
2.75 to 10 V 1.2
1.3V ?V O Line Regulation V I =
2.75 to 8 V I O = 0 mA 16mV ?V O Load Regulation V I = 2.75 V
I O = 0 to 1 A
110
mV ?V O Temperature Stability 0.5%?V O Long Term Stability 1000 hrs, T J = 125°C 0.3
%V I Operating Input Voltage I O = 100 mA 10V I d Quiescent Current V I ≤ 8 V
I O = 0 mA
510
mA I O Output Current V I - V O = 5 VT J = 25°C 1000
1200mA eN Output Noise Voltage B =10Hz to 10KHz T J = 25°C
100μV SVR Supply Voltage Rejection I O = 40 mA f = 120Hz
V I - V O = 3 VV ripple = 1 V PP 60
80dB V D
Dropout Voltage
I O = 100 mA 1 1.10V
I O = 500 mA 1.05 1.15I O = 1 A
1.15 1.30?V O(pwr)Thermal Regulation
T a = 25°C 30ms Pulse 0.08
0.2
%/W
LD1117A SERIES
TYPICAL APPLICATIONS
Figure 4: Negative Supply
Figure 5: Active Terminator for SCSI-2 BUS
Figure 6: Circuit for Increasing Output Voltage
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LD1117A SERIES
Figure 7: Voltage Regulator With Reference
Figure 8: Battery Backed-up Regulated Supply
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LD1117A SERIES
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Figure 9: Post-Regulated Dual Supply
LD1117A ADJUSTABLE: APPLICATION NOTE The LD1117A ADJUSTABLE has a thermal stabilized 1.25±0.012V reference voltage between the OUT and ADJ pins. I ADJ is 60μA typ. (120μA max.) and ?I ADJ is 1μA typ. (5μA max.).
R1 is normally fixed to 120?. From figure 7 we obtain:
V OUT = V REF + R2 (I ADJ + I R1) = V REF + R2 (I ADJ +V REF /R1) = V REF (1 + R2 / R1) + R2 x I ADJ .In normal application R2 value is in the range of few Kohm, so the R2 x I DJ product could not be
considered in the V OUT calculation; then the above expression becomes:V OUT = V REF (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. 10).
LD1117A SERIES
Figure 10: Adjustable Output Voltage Application
Figure 11: Adjustable Output Voltage Application with improved Ripple Rejection
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LD1117A SERIES
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DIM.
mm.
mils
MIN.
TYP
MAX.MIN.
TYP.
MAX.A 1.870.9A10.020.10.8 3.9B 0.60.70.8523.627.633.5B1 2.93 3.15114.2118.1124.0c 0.240.260.359.410.213.8D 6.3
6.5 6.7
248.0
255.9263.8
e 2.390.6e1 4.6181.1E 3.3 3.5 3.7129.9137.8145.7H 6.77
7.3
129.9
137.8
145.7V
10?
SOT -223 MECHANICAL DATA
0046067/H
10?
LD1117A SERIES
12/17DIM.
mm.inch
MIN.TYP MAX.MIN.TYP.MAX.
A 2.2 2.40.0860.094 A10.9 1.10.0350.043 A20.030.230.0010.009 B0.640.90.0250.035 B2 5.2 5.40.2040.212 C0.450.60.0170.023 C20.480.60.0190.023 D6 6.20.2360.244 D1 5.10.200
E 6.4 6.60.2520.260 E1 4.70.185
e 2.280.090
e1 4.4 4.60.1730.181 H9.3510.10.3680.397 L10.039
(L1) 2.80.110
L20.80.031
L40.610.0230.039
DPAK MECHANICAL DATA
0068772-F
LD1117A SERIES
13/17
DIM.mm.
inch MIN.TYP
MAX.MIN.TYP.
MAX.A 4.40 4.600.1730.181C 1.23 1.320.0480.051D 2.40
2.72
0.094
0.107
D1 1.27
0.050
E 0.490.700.0190.027
F 0.610.880.0240.034F1 1.14 1.700.0440.067F2 1.14 1.700.0440.067
G 4.95 5.150.1940.203G1 2.4 2.70.0940.106H210.0
10.40
0.393
0.409
L216.4
0.645
L413.014.00.5110.551L5 2.65 2.950.1040.116L615.2515.750.6000.620L7 6.2 6.60.2440.260L9 3.5 3.930.1370.154DIA.
3.75 3.85
0.147
0.151
TO-220 MECHANICAL DAT A
P011C
LD1117A SERIES
14/17DIM.
mm.inch
MIN.TYP MAX.MIN.TYP.MAX. A33012.992 C12.813.013.20.5040.5120.519 D20.20.795
N60 2.362
T14.40.567 Ao 6.73 6.83 6.930.2650.2690.273 Bo7.327.427.520.2880.2920.296 Ko 1.7820.0700.078 Po 3.9 4.0 4.10.1530.1570.161 P7.98.08.10.3110.3150.319
Tape & Reel SOT223 MECHANICAL DATA
LD1117A SERIES Tape & Reel DPAK-PPAK MECHANICAL DATA
mm.inch
DIM.
MIN.TYP MAX.MIN.TYP.MAX.
A33012.992
C12.813.013.20.5040.5120.519
D20.20.795
N60 2.362
T22.40.882
Ao 6.80 6.907.000.2680.2720.2.76
Bo10.4010.5010.600.4090.4130.417
Ko 2.55 2.65 2.750.1000.1040.105
Po 3.9 4.0 4.10.1530.1570.161
P7.98.08.10.3110.3150.319
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LD1117A SERIES
Table 11: Revision History
Date Revision Description of Changes 29-Sep-200411Add new Part Number #12.
12-Oct-200412Mistake V O max. - Table 4.
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LD1117A SERIES Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
All other names are the property of their respective owners
? 2004 STMicroelectronics - All Rights Reserved
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