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LD1117A series
Low drop fixed and adjustable positive voltage regulators
Features

Low dropout voltage (1.15V typ. @ IOUT = 1A, 25C) Very low quiescent current (5 mA typ. @ 25C) Output current up to 1A Fixed output voltage of: 1.2V, 1.8V, 2.5V, 2.85V, 3.3V, 5.0V Adjustable version availability (Vrel = 1.25V) Internal current and thermal limit Only 10 F for stability Available in 2% (at 25C) and 4% in full temperature range High supply voltage rejection: - 80dB typ. at 25C) Temperature range: 0C to 125C 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, D2PAK/A and TO-220. 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 10F minimum capacitor is needed for stability. Only chip trimming allows the regulator to reach a very tight output voltage tolerance, within 2% at 25C.
DPAK D2PAK/A SOT-223 TO-220
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).
Block diagram
January 2007
Rev. 17
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www.st.com
27
LD1117A series
Contents
1 2 3 4 5 6 7 8 9 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 LD1117A Adjustable: Application note . . . . . . . . . . . . . . . . . . . . . . . . . 13 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
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LD1117A series
Pin configuration
1
Figure 1.
Pin configuration
Pin connections (top view)
SOT-223
DPAK
TO-220
D2PAK/A
Note:
The TAB is connected to the VOUT.
3/27
Maximum ratings
LD1117A series
2
Table 1.
Symbol VIN PTOT TSTG TOP
Maximum ratings
Absolute maximum ratings
Parameter DC Input Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Value 15 12 -40 to +150 0 to +125 Unit V W C C
Note:
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.
Thermal Data
Parameter Thermal Resistance Junction-case Thermal Resistance Junction-ambient SOT-223 15 D2PAK/A 3 DPAK 8 TO-220 3 50 Unit C/W C/W
Table 2.
Symbol RthJC RthJA
4/27
LD1117A series
Schematic application
3
Figure 2.
Schematic application
Application circuit (for other fixed output voltages)
5/27
Electrical characteristics
LD1117A series
4
Table 3.
Electrical characteristics
Electrical characteristics of LD1117A#12 (refer to the test circuits, TJ = 0 to 125C, CO = 10 F, CI = 10 F, R = 120 between OUTGND, unless otherwise specified).
Parameter Output voltage Output voltage Line regulation Load regulation Temperature stability Long term stability Operating input voltage Quiescent current Output current Output noise voltage Supply voltage rejection 1000 hrs, TJ = 125C IO = 100mA VI 8V, IO = 0mA VI - VO = 5V, TJ = 25C B =10Hz to 10KHz, TJ = 25C IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP IO = 100mA VD Dropout voltage IO = 500mA IO = 1A 60 1000 5 1200 100 80 1 1.05 1.15 0.08 1.10 1.15 1.30 0.2 %/W V Test conditions VI = 5.3V, IO = 10mA, TJ = 25C IO = 0 to 1A, VI = 2.75 to 10V VI = 2.75 to 8V, IO = 0mA VI = 2.75V, IO = 0 to 1A Min. 1.176 1.152 Typ. 1.2 1.2 1 1 0.5 0.3 10 10 Max. 1.224 1.248 6 10 Unit V V mV mV % % V mA mA V dB
Symbol VO VO VO VO VO VO VI Id IO eN SVR
VO(pwr) Thermal regulation
Ta = 25C, 30ms Pulse
6/27
LD1117A series Table 4.
Symbol VO VO VO VO VO VO VI Id IO eN SVR
Electrical characteristics
Electrical characteristics of LD1117A#18 (refer to the test circuits, TJ = 0 to 125C, CO = 10 F, CI = 10 F unless otherwise specified).
Parameter Output voltage Output voltage Line regulation Load regulation Temperature stability Long term stability Operating input voltage Quiescent current Output current Output noise voltage Supply voltage rejection 1000 hrs, TJ = 125C IO = 100mA VI 8V, IO = 0mA VI - VO = 5V, TJ = 25C B =10Hz to 10KHz, TJ = 25C IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP IO = 100mA 60 1000 100 80 1 1.05 1.15 0.08 1.10 1.15 1.30 0.2 %/W V 5 Test conditions VI = 3.8V, IO = 10mA, TJ = 25C IO = 0 to 1A, VI = 3.3 to 8V VI = 3.3 to 8V, IO = 0mA VI = 3.3V, IO = 0 to 1A Min. 1.764 1.728 1 1 0.5 0.3 10 10 Typ. 1.8 Max. 1.836 1.872 6 10 Unit V V mV mV % % V mA mA V dB
VD
Dropout voltage
IO = 500mA IO = 1A
VO(pwr) Thermal regulation
Ta = 25C, 30ms Pulse
Table 5.
Symbol VO VO VO VO VO VO VI Id IO eN SVR
Electrical characteristics of LD1117A#25 (refer to the test circuits, TJ = 0 to 125C, CO = 10 F, CI = 10 F unless otherwise specified).
Parameter Output voltage Output voltage Line regulation Load regulation Temperature stability Long term stability Operating input voltage Quiescent current Output current Output noise voltage Supply voltage rejection 1000 hrs, TJ = 125C IO = 100mA VI 10V, IO = 0mA VI - VO = 5V, TJ = 25C B =10Hz to 10KHz, TJ = 25C IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP IO = 100mA 60 1000 5 1200 100 80 1 1.05 1.15 0.08 1.10 1.15 1.30 0.2 %/W 7/27 V Test conditions VI = 4.5V, IO = 10mA, TJ = 25C IO = 0 to 1A, VI = 3.9 to 8V VI = 3.9 to 8V, IO = 0mA VI = 3.9V, IO = 0 to 1A Min. 2.45 2.4 1 1 0.5 0.3 10 10 Typ. 2.5 Max. 2.55 2.6 6 10 Unit V V mV mV % % V mA mA V dB
VD
Dropout voltage
IO = 500mA IO = 1A
VO(pwr) Thermal regulation
Ta = 25C, 30ms Pulse
Electrical characteristics Table 6.
Symbol VO VO VO VO VO VO VI Id IO eN SVR
LD1117A series
Electrical characteristics of LD1117A#28 (refer to the test circuits, TJ = 0 to 125C, CO = 10 F, CI = 10 F unless otherwise specified).
Parameter Output voltage Output voltage Line regulation Load regulation Temperature stability Long term stability Operating input voltage Quiescent current Output current Output noise voltage Supply voltage rejection 1000 hrs, TJ = 125C IO = 100mA VI 10V, IO = 0mA VI - VO = 5V, TJ = 25C B =10Hz to 10KHz, TJ = 25C IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP IO = 100mA 60 1000 4.5 1200 100 75 1 1.05 1.15 0.08 1.10 1.15 1.30 0.2 %/W V Test conditions VI = 4.85V, IO = 10mA, TJ = 25C IO = 0 to 1A, VI = 4.25 to 10V VI = 4.25 to 8V, IO = 0mA VI = 4.25V, IO = 0 to 1A Min. 2.793 2.736 1 1 0.5 0.3 10 10 Typ. 2.85 Max. 2.907 2.964 6 10 Unit V V mV mV % % V mA mA V dB
VD
Dropout voltage
IO = 500mA IO = 1A
VO(pwr) Thermal regulation
Ta = 25C, 30ms Pulse
Table 7.
Symbol VO VO VO VO VO VO VI Id IO eN SVR
Electrical characteristics of LD1117A#33 (refer to the test circuits, TJ = 0 to 125C, CO = 10 F, CI = 10 F unless otherwise specified).
Parameter Output voltage Output voltage Line regulation Load regulation Temperature stability Long term stability Operating input voltage Quiescent current Output current Output noise voltage Supply voltage rejection 1000 hrs, TJ = 125C IO = 100mA VI 10V, IO = 0mA VI - VO = 5V, TJ = 25C B =10Hz to 10KHz, TJ = 25C IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP IO = 100mA 60 1000 5 1200 100 75 1 1.05 1.15 0.08 1.10 1.15 1.30 0.2 %/W V Test conditions VI = 5.3V, IO = 10mA, TJ = 25C IO = 0 to 1A, VI = 4.75 to 10V VI = 4.75 to 8V, IO = 0mA VI = 4.75V, IO = 0 to 1A Min. 3.234 3.168 1 1 0.5 0.3 10 10 Typ. 3.3 Max. 3.366 3.432 6 10 Unit V V mV mV % % V mA mA V dB
VD
Dropout voltage
IO = 500mA IO = 1A
VO(pwr) Thermal regulation 8/27
Ta = 25C, 30ms Pulse
LD1117A series Table 8.
Symbol VO VO VO VO VO VO VI Id IO eN SVR
Electrical characteristics
Electrical characteristics of LD1117#50 (refer to the test circuits, TJ = 0 to 125C, CO = 10 F, CI = 10 F unless otherwise specified).
Parameter Output voltage Output voltage Line regulation Load regulation Temperature stability Long term stability Operating input voltage Quiescent current Output current Output noise voltage Supply voltage rejection 1000 hrs, TJ = 125C IO = 100mA VI 10V, IO = 0mA VI - VO = 5V, TJ = 25C B =10Hz to 10KHz, TJ = 25C IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP IO = 100mA 60 1000 5 1200 100 80 1 1.05 1.15 0.08 1.10 1.15 1.30 0.2 %/W V Test conditions VI = 7V, IO = 10mA, TJ = 25C IO = 0 to 1A, VI = 6.4 to 10V VI = 6.4 to 8V, IO = 0mA VI = 6.4V, IO = 0 to 1A Min. 4.9 4.8 1 1 0.5 0.3 10 10 Typ. 5 Max. 5.1 5.2 6 10 Unit V V mV mV % % V mA mA V dB
VD
Dropout voltage
IO = 500mA IO = 1A
VO(pwr) Thermal regulation
Ta = 25C, 30ms Pulse
Table 9.
Symbol VO VO VO VO VO VO VI Id IO eN SVR
Electrical characteristics of LD1117A (Adjustable) (refer to the test circuits, TJ = 0 to 125C, CO = 10 F, CI = 10 F unless otherwise specified).
Parameter Output voltage Output voltage Line regulation Load regulation Temperature stability Long term stability Operating input voltage Quiescent current Output current Output noise voltage Supply voltage rejection 1000 hrs, TJ = 125C IO = 100mA VI 8V, IO = 0mA VI - VO = 5V, TJ = 25C B =10Hz to 10KHz, TJ = 25C IO = 40mA, f = 120Hz VI - VO = 3V, Vripple = 1VPP IO = 100mA 60 1000 5 1200 100 80 1 1.05 1.15 0.08 1.10 1.15 1.30 0.2 %/W 9/27 V Test conditions VI = 5.3V, IO = 10mA, TJ = 25C IO = 0 to 1A, VI = 2.75 to 10V VI = 2.75 to 8V, IO = 0mA VI = 2.75V, IO = 0 to 1A Min. 1.225 1.2 1 1 0.5 0.3 10 10 Typ. 1.25 Max. 1.275 1.3 6 10 Unit V V mV mV % % V mA mA V dB
VD
Dropout voltage
IO = 500mA IO = 1A
VO(pwr) Thermal regulation
Ta = 25C, 30ms Pulse
Typical application
LD1117A series
5
Figure 3.
Typical application
Negative supply
Figure 4.
Active terminator for SCSI-2 BUS
Figure 5.
Circuit for increasing output voltage
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LD1117A series
Typical application
Figure 6.
Voltage Regulator With Reference
Figure 7.
Battery backed-up regulated supply
11/27
Typical application
LD1117A series
Figure 8.
Post-regulated dual supply
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LD1117A series
LD1117A Adjustable: Application note
6
LD1117A Adjustable: Application note
The LD1117 Adjustable has a thermal stabilized 1.250.012V reference voltage between the OUT and ADJ pins. IADJ is 60A typ. (120A max.) and IADJ is 1A typ. (5A max.). R1 is normally fixed to 120 From Figure 6. we obtain: . VOUT = VREF + R2 (IADJ +IR1) = VREF + R2 (IADJ +VREF /R1) = VREF (1 + R2 / R1) + R2 x IADJ. In normal application R2 value is in the range of few k 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 10F electrolytic capacitor placed in parallel to the R2 resistor (see Figure 9.).
Figure 9.
Adjustable output voltage application
Figure 10. Adjustable output voltage application with improved ripple rejection
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Package mechanical data
LD1117A series
7
Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
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LD1117A series
Package mechanical data
SOT-223 MECHANICAL DATA
mm. DIM. MIN. A A1 B B1 c D e e1 E H V 3.3 6.7 0.02 0.6 2.9 0.24 6.3 0.7 3 0.26 6.5 2.3 4.6 3.5 7 3.7 7.3 10 129.9 263.8 TYP MAX. 1.8 0.1 0.85 3.15 0.35 6.7 0.8 23.6 114.2 9.4 248.0 27.6 118.1 10.2 255.9 90.6 181.1 137.8 275.7 145.7 287.5 10 MIN. TYP. MAX. 70.9 3.9 33.5 124.0 13.8 263.8 mils
0046067/H
15/27
Package mechanical data
LD1117A series
TO-220 MECHANICAL DATA
DIM. A C D D1 E F F1 F2 G G1 H2 L2 L4 L5 L6 L7 L9 DIA. 13.0 2.65 15.25 6.2 3.5 3.75 0.49 0.61 1.14 1.14 4.95 2.4 10.0 16.4 14.0 2.95 15.75 6.6 3.93 3.85 0.511 0.104 0.600 0.244 0.137 0.147 mm. MIN. 4.40 1.23 2.40 1.27 0.70 0.88 1.70 1.70 5.15 2.7 10.40 0.019 0.024 0.044 0.044 0.194 0.094 0.393 0.645 0.551 0.116 0.620 0.260 0.154 0.151 TYP MAX. 4.60 1.32 2.72 MIN. 0.173 0.048 0.094 0.050 0.027 0.034 0.067 0.067 0.203 0.106 0.409 inch TYP. MAX. 0.181 0.051 0.107
P011C
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LD1117A series
Package mechanical data
Figure 11. DRAWING DIMENSION D2PAK/A (TYPE STD-ST)
7106164/E
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Package mechanical data
LD1117A series
Figure 12. DRAWING DIMENSION D2PAK/A (TYPE WOOSEOK-SUBCON.)
7106164/E 18/27
LD1117A series
Package mechanical data
Table 10.
D2PAK/A MECHANICAL DATA
TYPE STD-ST TYPE WOOSEOK-SUBCON. mm. MAX. 4.60 0.23 0.93 1.30 1.70 0.60 1.36 9.35 1.17 0.45 1.25 9 7.50 10.40 9.80 7.50 2.54 4.88 15 2.49 2.29 1.27 0.4 0 8 0 5.28 15.85 2.69 2.79 1.40 15 2.20 1.79 1 0.30 3 2.54 5.08 15.30 15.60 2.60 2.79 1.40 10.20 0.50 1.30 9.20 1.37 0.60 1.40 9.40 MIN. 4.30 0 0.70 TYP. MAX. 4.70 0.20 0.90
DIM. MIN. A A1 b b1 b2 c c2 D D1 E E1 e e1 H J1 L L1 R V2 4.40 0.03 0.70 0.80 1.14 0.45 1.23 8.95 7.50 10 8.50
mm. TYP.
Note:
The D2PAK/A package coming from the subcontractor Wooseok is fully compatible with the ST's package suggested footprint.
19/27
Package mechanical data
LD1117A series
Figure 13. D2PAK/A FOOTPRINT RECOMMENDED DATA
Table 11.
FOOTPRINT DATA
VALUES mm. A B C D E F G 12.20 9.75 16.90 3.50 1.60 2.54 5.08 inch. 0.480 0.384 0.665 0.138 0.063 0.100 0.200
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LD1117A series
Package mechanical data
DPAK MECHANICAL DATA
mm. DIM. MIN. A A1 A2 B b4 C C2 D D1 E E1 e e1 H L (L1) L2 L4 R V2 2.2 0.9 0.03 0.64 5.2 0.45 0.48 6 5.1 6.4 4.7 2.28 4.4 9.35 1 2.8 0.8 0.6 0.2 0 8 0 1 0.023 0.008 8 4.6 10.1 0.173 0.368 0.039 0.110 0.031 0.039 6.6 0.252 0.185 0.090 0.181 0.397 TYP MAX. 2.4 1.1 0.23 0.9 5.4 0.6 0.6 6.2 MIN. 0.086 0.035 0.001 0.025 0.204 0.017 0.019 0.236 0.200 0.260 TYP. MAX. 0.094 0.043 0.009 0.035 0.212 0.023 0.023 0.244 inch
0068772-F
21/27
Package mechanical data
LD1117A series
Tape & Reel SOT223 MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.73 7.32 1.78 3.9 7.9 4.0 8.0 6.83 7.42 12.8 20.2 60 14.4 6.93 7.52 2 4.1 8.1 0.265 0.288 0.070 0.153 0.311 0.157 0.315 0.269 0.292 13.0 TYP MAX. 330 13.2 0.504 0.795 2.362 0.567 0.273 0.296 0.078 0.161 0.319 0.512 MIN. TYP. MAX. 12.992 0.519 inch
22/27
LD1117A series
Package mechanical data
Tape & Reel DPAK-PPAK MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 6.80 10.40 2.55 3.9 7.9 6.90 10.50 2.65 4.0 8.0 12.8 20.2 60 22.4 7.00 10.60 2.75 4.1 8.1 0.268 0.409 0.100 0.153 0.311 0.272 0.413 0.104 0.157 0.315 13.0 TYP MAX. 330 13.2 0.504 0.795 2.362 0.882 0.2.76 0.417 0.105 0.161 0.319 0.512 MIN. TYP. MAX. 12.992 0.519 inch
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Package mechanical data
LD1117A series
Tape & Reel D2PAK-P 2PAK-D 2PAK/A-P 2PAK/A MECHANICAL DATA
mm. DIM. MIN. A C D N T Ao Bo Ko Po P 10.50 15.70 4.80 3.9 11.9 10.6 15.80 4.90 4.0 12.0 12.8 20.2 60 14.4 10.70 15.90 5.00 4.1 12.1 0.413 0.618 0.189 0.153 0.468 0.417 0.622 0.193 0.157 0.472 13.0 TYP MAX. 180 13.2 0.504 0.795 2.362 0.567 0.421 0.626 0.197 0.161 0.476 0.512 MIN. TYP. MAX. 7.086 0.519 inch
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LD1117A series
Order code
8
Table 12.
Order code
Order code
Part numbers SOT-223 LD1117AS12TR LD1117AS18TR LD1117AS25TR LD1117AS28TR(1) LD1117AS33TR LD1117AS50TR(1) LD1117ASTR DPAK LD1117ADT12TR(1) LD1117ADT18TR LD1117ADT25TR LD1117ADT28TR(1) LD1117ADT33TR LD1117ADT50TR(1) LD1117ADT-TR LD1117AD2MTR D2PAK/A TO-220 LD1117AV12(1) LD1117AV18 LD1117AV25 LD1117AV28(1) LD1117AV33 LD1117AV50(1) LD1117AV OUTPUT VOLTAGE 1.2 V 1.8 V 2.5 V 2.85 V 3.3 V 5V ADJUSTABLE FROM 1.25 to 15V
1. Available on request.
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Revision history
LD1117A series
9
Table 13.
Date
Revision history
Document revision history
Revision 11 12 13 14 15 16 17 Add new Part Number #12. Mistake VO max. - Table 4. Add new package - D2PAK/A. The DPAK Mechanical Data has been updated. Add new package - D2PAK/A (B Type). Change value VIN on Table 1. and the document has been reformatted. D2PAK/A mechanical data has been updated and add footprint data. Changes
29-Sep-2004 12-Oct-2004 21-Apr-2005 05-Jul-2005 10-Feb-2006 20-Dec-2006 19-Jan-2007
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LD1117A series
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