March 2010 Doc ID 2572 Rev 28 1/42
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LD1117xx
Adjustable and fixed low drop positive voltage regulator
Features
■Low dropout voltage (1 V typ.)
■2.85 V device performances are suitable for
SCSI-2 active termination
■Output current up to 800 mA
■Fixed output voltage of: 1.2 V, 1.8 V, 2.5 V,
3.0 V, 3.3 V, 5.0 V
■Adjustable version availability (Vref = 1.25 V)
■Internal current and thermal limit
■Available in ± 1% (at 25 °C) and 2% in full
temperature range
■Supply voltage rejection: 75 dB (typ.)
Description
The LD1117 is a low drop voltage regulator able
to provide up to 800 mA of output current,
available even in adjustable version (VREF = 1.25
V). Concerning fixed versions, are offered the
following output voltages: 1.2 V, 1.8 V, 2.5 V, 2.85
V, 3.0 V, 3.3 V and 5.0 V. The 2.85 V type is ideal
for SCSI-2 lines active termination. The device is
supplied in: SOT-223, DPAK, SO-8 and TO-220.
The SOT-223 and DPAK surface mount packages
optimize the thermal characteristics even offering
a relevant space saving effect.
High efficiency is assured by NPN pass transistor.
In fact in this case, unlike than PNP one, the
quiescent current flows mostly into the load. Only
a very common 10 µF minimum capacitor is
needed for stability. On chip trimming allows the
regulator to reach a very tight output voltage
tolerance, within ± 1% at 25°C. The adjustable
LD1117 is pin to pin compatible with the other
standard. Adjustable voltage regulators
maintaining the better performances in terms of
drop and tolerance.
DPAK
SO-8
TO-220
SOT-223
Table 1. Device summary
Part numbers
LD1117XX12 LD1117XX25C LD1117XX50C
LD1117XX12C LD1117XX30 LD1117XX
LD1117XX18 LD1117XX33 LD1117XXC
LD1117XX18C LD1117XX33C
LD1117XX25 LD1117XX50
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Contents LD1117xx
2/42 Doc ID 2572 Rev 28
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7 LD1117 adjustable: application note . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
9 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
LD1117xx List of tables
Doc ID 2572 Rev 28 3/42
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Electrical characteristics of LD1117#12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5. Electrical characteristics of LD1117#18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 6. Electrical characteristics of LD1117#25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 7. Electrical characteristics of LD1117#30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 8. Electrical characteristics of LD1117#33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 9. Electrical characteristics of LD1117#50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 10. Electrical characteristics of LD1117 (adjustable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 11. Electrical characteristics of LD1117#12C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 12. Electrical characteristics of LD1117#18C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 13. Electrical characteristics of LD1117#25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 14. Electrical characteristics of LD1117#33C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 15. Electrical characteristics of LD1117#50C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 16. Electrical characteristics of LD1117C (adjustable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 17. TO-220 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 18. DPAK mechanical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 19. Footprint data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 20. Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 21. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
List of figures LD1117xx
4/42 Doc ID 2572 Rev 28
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Application circuit (for 1.2 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4. Application circuit (for other fixed output voltages) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. Negative supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 6. Active terminator for SCSI-2 bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 7. Circuit for increasing output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 8. Voltage regulator with reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 9. Battery backed-up regulated supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 10. Post-regulated dual supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 11. Adjustable output voltage application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 12. Adjustable output voltage application with improved ripple rejection . . . . . . . . . . . . . . . . . 25
Figure 13. Drawing dimension TO-220 (type STD-ST Dual Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 14. Drawing dimension TO-220 (type STD-ST Single Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 15. Drawing dimension tube for TO-220 Dual Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 16. Drawing dimension tube for TO-220 Single Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 17. Drawing dimension DPAK (type STD-ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 18. Drawing dimension DPAK (type Fujitsu-subcon.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 19. Drawing dimension DPAK (type IDS-subcon.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 20. DPAK footprint recommended data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
LD1117xx Diagram
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1 Diagram
Figure 1. Block diagram
Pin configuration LD1117xx
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2 Pin configuration
Note: The TAB is connected to the VOUT
.
Figure 2. Pin connections (top view)
SO-8
TO-220
SOT-223
DPAK
LD1117xx Maximum ratings
Doc ID 2572 Rev 28 7/42
3 Maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
VIN (1)
1. Absolute maximum rating of VIN = 18 V, when IOUT is lower than 20 mA.
DC input voltage 15 V
PTOT Power dissipation 12 W
TSTG Storage temperature range -40 to +150 °C
TOP Operating junction temperature range for C Version -40 to +125 °C
for standard Version 0 to +125 °C
Table 3. Thermal data
Symbol Parameter SOT-223 SO-8 DPAK TO-220 Unit
RthJC Thermal resistance junction-case 15 20 8 3 °C/W
RthJA Thermal resistance junction-ambient 50 °C/W
Schematic application LD1117xx
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4 Schematic application
Figure 3. Application circuit (for 1.2 V)
Figure 4. Application circuit (for other fixed output voltages)
LD1117xx Electrical characteristics
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5 Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, R = 120 Ω between GND and OUT
pins, unless otherwise specified.
Table 4. Electrical characteristics of LD1117#12
Symbol Parameter Test condition Min. Typ. Max. Unit
VOOutput voltage Vin = 3.2 V, IO = 10 mA, TJ = 25 °C 1.188 1.20 1.212 V
VOReference voltage IO = 10 to 800 mA
Vin - VO = 1.4 to 10 V 1.140 1.20 1.260 V
ΔVOLine regulation Vin - VO = 1.5 to 13.75 V, IO = 10 mA 0.035 0.2 %
ΔVOLoad regulation Vin - VO = 3 V, IO = 10 to 800 mA 0.1 0.4 %
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage 15 V
Iadj Adjustment pin current Vin ≤ 15 V 60 120 µA
ΔIadj Adjustment pin current change Vin - VO = 1.4 to 10 V
IO = 10 to 800 mA 15µA
IO(min) Minimum load current Vin = 15 V 2 5 mA
IOOutput current Vin - VO = 5 V, TJ = 25 °C 800 950 1300 mA
eN Output noise (%VO) B = 10 Hz to 10 kHz, TJ = 25 °C 0.003 %
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin - VO = 3 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA 1 1.1
VIO = 500 mA 1.05 1.15
IO = 800 mA 1.10 1.2
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
Electrical characteristics LD1117xx
10/42 Doc ID 2572 Rev 28
Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 5. Electrical characteristics of LD1117#18
Symbol Parameter Test condition Min. Typ. Max. Unit
VOOutput voltage Vin = 3.8 V, IO = 10 mA, TJ = 25 °C 1.78 1.8 1.82 V
VOOutput voltage IO = 0 to 800 mA, Vin = 3.3 to 8 V 1.76 1.84 V
ΔVOLine regulation Vin = 3.3 to 8 V, IO = 0 mA 1 6 mV
ΔVOLoad regulation Vin = 3.3 V, IO = 0 to 800 mA 1 10 mV
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage IO = 100 mA 15 V
IdQuiescent current Vin ≤ 8 V 5 10 mA
IOOutput current Vin = 6.8 V, TJ = 25 °C 800 950 1300 mA
eN Output noise voltage B = 10 Hz to 10 kHz, TJ = 25 °C 100 µV
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin = 5.5 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA 1 1.1
VIO = 500 mA 1.05 1.15
IO = 800 mA 1.10 1.2
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
LD1117xx Electrical characteristics
Doc ID 2572 Rev 28 11/42
Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 6. Electrical characteristics of LD1117#25
Symbol Parameter Test condition Min. Typ. Max. Unit
VOOutput voltage Vin = 4.5 V, IO = 10 mA, TJ = 25 °C 2.475 2.5 2.525 V
VOOutput voltage IO = 0 to 800 mA, Vin = 3.9 to 10 V 2.45 2.55 V
ΔVOLine regulation Vin = 3.9 to 10 V, IO = 0 mA 1 6 mV
ΔVOLoad regulation Vin = 3.9 V, IO = 0 to 800 mA 1 10 mV
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage IO = 100 mA 15 V
IdQuiescent current Vin ≤ 10 V 5 10 mA
IOOutput current Vin = 7.5 V TJ = 25 °C 800 950 1300 mA
eN Output noise voltage B = 10 Hz to 10 kHz, TJ = 25 °C 100 µV
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin = 5.5 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA 1 1.1
VIO = 500 mA 1.05 1.15
IO = 800 mA 1.10 1.2
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
Electrical characteristics LD1117xx
12/42 Doc ID 2572 Rev 28
Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 7. Electrical characteristics of LD1117#30
Symbol Parameter Test condition Min. Typ. Max. Unit
VOOutput voltage Vin = 5 V, IO = 10 mA, TJ = 25 °C 2.97 3 3.03 V
VOOutput voltage IO = 0 to 800 mA, Vin = 4.5 to 10 V 2.94 3.06 V
ΔVOLine regulation Vin = 4.5 to 12 V, IO = 0 mA 1 6 mV
ΔVOLoad regulation Vin = 4.5 V, IO = 0 to 800 mA 1 10 mV
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage IO = 100 mA 15 V
IdQuiescent current Vin ≤ 12 V 5 10 mA
IOOutput current Vin = 8 V, TJ = 25 °C 800 950 1300 mA
eN Output noise voltage B = 10 Hz to 10 kHz, TJ = 25 °C 100 µF
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin = 6 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA 1 1.1
VIO = 500 mA 1.05 1.15
IO = 800 mA 1.10 1.2
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
LD1117xx Electrical characteristics
Doc ID 2572 Rev 28 13/42
Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 8. Electrical characteristics of LD1117#33
Symbol Parameter Test condition Min. Typ. Max. Unit
VOOutput voltage Vin = 5.3 V, IO = 10 mA, TJ = 25 °C 3.267 3.3 3.333 V
VOOutput voltage IO = 0 to 800 mA, Vin = 4.75 to 10 V 3.235 3.365 V
ΔVOLine regulation Vin = 4.75 to 15 V, IO = 0 mA 1 6 mV
ΔVOLoad regulation Vin = 4.75 V, IO = 0 to 800 mA 1 10 mV
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage IO = 100 mA 15 V
IdQuiescent current Vin ≤ 15 V 5 10 mA
IOOutput current Vin = 8.3 V, TJ = 25 °C 800 950 1300 mA
eN Output noise voltage B = 10 Hz to 10 kHz, TJ = 25 °C 100 µV
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin = 6.3 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA 1 1.1
VIO = 500 mA 1.05 1.15
IO = 800 mA 1.10 1.2
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
Electrical characteristics LD1117xx
14/42 Doc ID 2572 Rev 28
Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 9. Electrical characteristics of LD1117#50
Symbol Parameter Test condition Min. Typ. Max. Unit
VOOutput voltage Vin = 7 V, IO = 10 mA, TJ = 25 °C 4.95 5 5.05 V
VOOutput voltage IO = 0 to 800 mA, Vin = 6.5 to 15 V 4.9 5.1 V
ΔVOLine regulation Vin = 6.5 to 15 V, IO = 0 mA 1 10 mV
ΔVOLoad regulation Vin = 6.5 V, IO = 0 to 800 mA 1 15 mV
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage IO = 100 mA 15 V
IdQuiescent current Vin ≤ 15 V 5 10 mA
IOOutput current Vin = 10 V, TJ = 25 °C 800 950 1300 mA
eN Output noise voltage B = 10 Hz to 10 kHz, TJ = 25 °C 100 µV
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin = 8 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA 1 1.1
VIO = 500 mA 1.05 1.15
IO = 800 mA 1.10 1.2
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
LD1117xx Electrical characteristics
Doc ID 2572 Rev 28 15/42
Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 10. Electrical characteristics of LD1117 (adjustable)
Symbol Parameter Test condition Min. Typ. Max. Unit
Vref Reference voltage Vin - VO = 2 V, IO = 10 mA, TJ = 25 °C 1.238 1.25 1.262 V
Vref Reference voltage IO = 10 to 800 mA, Vin - VO = 1.4 to 10 V 1.225 1.275 V
ΔVOLine regulation Vin - VO = 1.5 to 13.75 V, IO = 10 mA 0.035 0.2 %
ΔVOLoad regulation Vin - VO = 3 V, IO = 10 to 800 mA 0.1 0.4 %
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage 15 V
Iadj Adjustment pin current Vin ≤ 15 V 60 120 µA
ΔIadj Adjustment pin current change Vin - VO = 1.4 to 10 V, IO = 10 to 800 mA 1 5 µA
IO(min) Minimum load current Vin = 15 V 2 5 mA
IOOutput current Vin - VO = 5 V, TJ = 25 °C 800 950 1300 mA
eN Output noise (%VO) B = 10 Hz to 10 kHz, TJ = 25 °C 0.003 %
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin - VO = 3 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA 1 1.1
VIO = 500 mA 1.05 1.15
IO = 800 mA 1.10 1.2
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
Electrical characteristics LD1117xx
16/42 Doc ID 2572 Rev 28
Refer to the test circuits, TJ = -40 to 125 °C, CO = 10 µF, R = 120 Ω between GND and OUT
pins, unless otherwise specified.
Table 11. Electrical characteristics of LD1117#12C
Symbol Parameter Test condition Min. Typ. Max. Unit
Vref Reference voltage Vin - VO = 2 V, IO = 10 mA, TJ = 25 °C 1.176 1.20 1.224 V
Vref Reference voltage IO = 10 to 800 mA, Vin - VO = 1.4 to 10 V 1.120 1.20 1.280 V
ΔVOLine regulation Vin - VO = 1.5 to 13.75 V, IO = 10 mA 1 %
ΔVOLoad regulation Vin - VO = 3 V, IO = 10 to 800 mA 1 %
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage 15 V
Iadj Adjustment pin current Vin ≤ 15 V 60 120 µA
ΔIadj
Adjustment pin current
change
Vin - VO = 1.4 to 10 V
IO = 10 to 800 mA 15µA
IO(min) Minimum load current Vin = 15 V 2 5 mA
IOOutput current Vin - VO = 5 V, TJ = 25 °C 800 950 1300 mA
eN Output noise (%VO) B = 10 Hz to 10 kHz, TJ = 25 °C 0.003 %
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin - VO = 3 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA, TJ = 0 to 125 °C 1 1.1
VIO = 500 mA, TJ = 0 to 125 °C 1.05 1.2
IO = 800 mA, TJ = 0 to 125 °C 1.10 1.3
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
LD1117xx Electrical characteristics
Doc ID 2572 Rev 28 17/42
Refer to the test circuits, TJ = -40 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 12. Electrical characteristics of LD1117#18C
Symbol Parameter Test condition Min. Typ. Max. Unit
VOOutput voltage Vin = 3.8 V, IO = 10 mA, TJ = 25 °C 1.76 1.8 1.84 V
VOOutput voltage IO = 0 to 800 mA, Vin = 3.9 to 10 V 1.73 1.87 V
ΔVOLine regulation Vin = 3.3 to 8 V, IO = 0 mA 1 30 mV
ΔVOLoad regulation Vin = 3.3 V, IO = 0 to 800 mA 1 30 mV
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage IO = 100 mA 15 V
IdQuiescent current Vin ≤ 8 V 5 10 mA
IOOutput current Vin = 6.8 V TJ = 25 °C 800 950 1300 mA
eN Output noise voltage B = 10 Hz to 10 kHz, TJ = 25 °C 100 µV
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin = 5.5 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA, TJ = 0 to 125 °C 1 1.1
VIO = 500 mA, TJ = 0 to 125 °C 1.05 1.15
IO = 800 mA, TJ = 0 to 125 °C 1.10 1.2
VdDropout voltage
IO = 100 mA 1.1
VIO = 500 mA 1.2
IO = 800 mA 1.3
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
Electrical characteristics LD1117xx
18/42 Doc ID 2572 Rev 28
Refer to the test circuits, TJ = -40 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 13. Electrical characteristics of LD1117#25C
Symbol Parameter Test condition Min. Typ. Max. Unit
VOOutput voltage Vin = 4.5 V, IO = 10 mA, TJ = 25 °C 2.45 2.5 2.55 V
VOOutput voltage IO = 0 to 800 mA, Vin = 3.9 to 10 V 2.4 2.6 V
ΔVOLine regulation Vin = 3.9 to 10 V, IO = 0 mA 1 30 mV
ΔVOLoad regulation Vin = 3.9 V, IO = 0 to 800 mA 1 30 mV
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage IO = 100 mA 15 V
IdQuiescent current Vin ≤ 10 V 5 10 mA
IOOutput current Vin = 7.5 V TJ = 25 °C 800 950 1300 mA
eN Output noise voltage B = 10 Hz to 10 kHz, TJ = 25 °C 100 µV
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin = 5.5 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA, TJ = 0 to 125 °C 1 1.1
VIO = 500 mA, TJ = 0 to 125 °C 1.05 1.15
IO = 800 mA, TJ = 0 to 125 °C 1.10 1.2
VdDropout voltage
IO = 100 mA 1.1
VIO = 500 mA 1.2
IO = 800 mA 1.3
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
LD1117xx Electrical characteristics
Doc ID 2572 Rev 28 19/42
Refer to the test circuits, TJ = -40 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 14. Electrical characteristics of LD1117#33C
Symbol Parameter Test condition Min. Typ. Max. Unit
VOOutput voltage Vin = 5.3 V, IO = 10 mA, TJ = 25 °C 3.24 3.3 3.36 V
VOOutput voltage IO = 0 to 800 mA, Vin = 4.75 to 10 V 3.16 3.44 V
ΔVOLine regulation Vin = 4.75 to 15 V, IO = 0 mA 1 30 mV
ΔVOLoad regulation Vin = 4.75 V, IO = 0 to 800 mA 1 30 mV
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage IO = 100 mA 15 V
IdQuiescent current Vin ≤ 15 V 5 10 mA
IOOutput current Vin = 8.3 V, TJ = 25 °C 800 950 1300 mA
eN Output noise voltage B = 10 Hz to 10 kHz, TJ = 25 °C 100 µV
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin = 6.3 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA, TJ = 0 to 125 °C 1 1.1
VIO = 500 mA, TJ = 0 to 125 °C 1.05 1.15
IO = 800 mA, TJ = 0 to 125 °C 1.10 1.2
VdDropout voltage
IO = 100 mA 1.1
VIO = 500 mA 1.2
IO = 800 mA 1.3
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
Electrical characteristics LD1117xx
20/42 Doc ID 2572 Rev 28
Refer to the test circuits, TJ = -40 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 15. Electrical characteristics of LD1117#50C
Symbol Parameter Test condition Min. Typ. Max. Unit
VOOutput voltage Vin = 7 V, IO = 10 mA, TJ = 25 °C 4.9 5 5.1 V
VOOutput voltage IO = 0 to 800 mA, Vin = 6.5 to 15 V 4.8 5.2 V
ΔVOLine regulation Vin = 6.5 to 15 V, IO = 0 mA 1 50 mV
ΔVOLoad regulation Vin = 6.5 V, IO = 0 to 800 mA 1 50 mV
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage IO = 100 mA 15 V
IdQuiescent current Vin ≤ 15 V 5 10 mA
IOOutput current Vin = 10 V, TJ = 25 °C 800 950 1300 mA
eN Output noise voltage B = 10 Hz to 10 kHz, TJ = 25 °C 100 µV
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin = 8 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA, TJ = 0 to 125 °C 1 1.1
VIO = 500 mA, TJ = 0 to 125 °C 1.05 1.15
IO = 800 mA, TJ = 0 to 125 °C 1.10 1.2
VdDropout voltage
IO = 100 mA 1.1
VIO = 500 mA 1.2
IO = 800 mA 1.3
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
LD1117xx Electrical characteristics
Doc ID 2572 Rev 28 21/42
Refer to the test circuits, TJ = -40 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 16. Electrical characteristics of LD1117C (adjustable)
Symbol Parameter Test condition Min. Typ. Max. Unit
Vref Reference voltage Vin - VO = 2 V, IO = 10 mA, TJ = 25 °C 1.225 1.25 1.275 V
Vref Reference voltage IO = 10 to 800 mA, Vin - VO= 1.4 to 10 V 1.2 1.3 V
ΔVOLine regulation Vin - VO = 1.5 to 13.75 V, IO = 10 mA 1 %
ΔVOLoad regulation Vin - VO = 3 V, IO = 10 to 800 mA 1 %
ΔVOTemperature stability 0.5 %
ΔVOLong term stability 1000 hrs, TJ = 125 °C 0.3 %
Vin Operating input voltage 15 V
Iadj Adjustment pin current Vin ≤ 15 V 60 120 µA
ΔIadj Adjustment pin current change Vin - VO = 1.4 to 10 V, IO = 10 to 800 mA 1 10 µA
IO(min) Minimum load current Vin = 15 V 2 5 mA
IOOutput current Vin - VO = 5 V, TJ = 25 °C 800 950 1300 mA
eN Output noise (%VO) B = 10 Hz to 10 kHz, TJ = 25 °C 0.003 %
SVR Supply voltage rejection IO = 40 mA, f = 120 Hz, TJ = 25 °C
Vin - VO = 3 V, Vripple = 1 VPP
60 75 dB
VdDropout voltage
IO = 100 mA, TJ = 0 to 125 °C 1 1.1
VIO = 500 mA, TJ = 0 to 125 °C 1.05 1.15
IO = 800 mA, TJ = 0 to 125 °C 1.10 1.2
VdDropout voltage
IO = 100 mA 1.1
VIO = 500 mA 1.2
IO = 800 mA 1.3
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
Typical application LD1117xx
22/42 Doc ID 2572 Rev 28
6 Typical application
Figure 5. Negative supply
Figure 6. Active terminator for SCSI-2 bus
Figure 7. Circuit for increasing output voltage
LD1117xx Typical application
Doc ID 2572 Rev 28 23/42
Figure 8. Voltage regulator with reference
Figure 9. Battery backed-up regulated supply
Typical application LD1117xx
24/42 Doc ID 2572 Rev 28
Figure 10. Post-regulated dual supply
LD1117xx LD1117 adjustable: application note
Doc ID 2572 Rev 28 25/42
7 LD1117 adjustable: application note
The LD1117 adjustable has a thermal stabilized 1.25 ± 0.012 V reference voltage between
the OUT and ADJ pins. IADJ is 60 µA typ. (120 µA max.) and ΔIADJ is 1 µA typ. (5 µA max.).
R1 is normally fixed to 120 Ω. From Figure 10 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 kΩ, 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 10 µF electrolytic capacitor
placed in parallel to the R2 resistor (see Figure 11).
Figure 11. Adjustable output voltage application
Figure 12. Adjustable output voltage application with improved ripple rejection
Package mechanical data LD1117xx
26/42 Doc ID 2572 Rev 28
8 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
In spite of some difference in tolerances, the packages are compatible.
Table 17. TO-220 mechanical data
Dim.
Type STD - ST Dual Gauge Type STD - ST Single Gauge
mm. mm.
Min. Typ. Max. Min. Typ. Max.
A 4.40 4.60 4.40 4.60
b 0.61 0.88 0.61 0.88
b1 1.14 1.70 1.14 1.70
c 0.48 0.70 0.48 0.70
D 15.25 15.75 15.25 15.75
D1 1.27
E 10.00 10.40 10.00 10.40
e 2.40 2.70 2.40 2.70
e1 4.95 5.15 4.95 5.15
F 1.23 1.32 0.51 0.60
H1 6.20 6.60 6.20 6.60
J1 2.40 2.72 2.40 2.72
L 13.00 14.00 13.00 14.00
L1 3.50 3.93 3.50 3.93
L20 16.40 16.40
L30 28.90 28.90
∅P 3.75 3.85 3.75 3.85
Q 2.65 2.95 2.65 2.95
LD1117xx Package mechanical data
Doc ID 2572 Rev 28 27/42
Note: 1 Maximum resin gate protrusion: 0.5 mm.
2 Resin gate position is accepted in each of the two positions shown on the drawing, or their
symmetrical.
Figure 13. Drawing dimension TO-220 (type STD-ST Dual Gauge)
0015988_S
Package mechanical data LD1117xx
28/42 Doc ID 2572 Rev 28
Figure 14. Drawing dimension TO-220 (type STD-ST Single Gauge)
8174627_B
LD1117xx Package mechanical data
Doc ID 2572 Rev 28 29/42
Figure 15. Drawing dimension tube for TO-220 Dual Gauge (mm.)
Figure 16. Drawing dimension tube for TO-220 Single Gauge (mm.)
Package mechanical data LD1117xx
30/42 Doc ID 2572 Rev 28
Dim.
mm. mils.
Min. Typ. Max. Min. Typ. Max.
A1.870.9
A1 0.02 0.1 0.83.9
B 0.6 0.7 0.8523.6 27.6 33.5
B1 2.933.15 114.2 118.1 124.0
c 0.24 0.26 0.359.4 10.2 13.8
D6.36.5 6.7 248.0 255.9263.8
e2.390.6
e1 4.6 181.1
E3.33.5 3.7 129.9137.8145.7
H6.777.3263.8275.7 287.5
V 10° 10°
SOT-223 mechanical data
0046067/H
LD1117xx Package mechanical data
Doc ID 2572 Rev 28 31/42
Dim. mm. inch.
Min. Typ. Max. Min. Typ. Max.
A1.35 1.75 0.0530.069
A1 0.10 0.25 0.04 0.010
A2 1.10 1.65 0.0430.065
B0.33 0.51 0.0130.020
C0.190.25 0.007 0.010
D4.80 5.00 0.189 0.197
E3.80 4.00 0.150 0.157
e 1.27 0.050
H5.80 6.20 0.2280.244
h 0.25 0.50 0.010 0.020
L 0.40 1.27 0.016 0.050
k8° (max.)
ddd 0.1 0.04
SO-8 mechanical data
0016023/C
Package mechanical data LD1117xx
32/42 Doc ID 2572 Rev 28
Note: 1 Maximum resin gate protrusion: 0.5 mm.
2 Maximum resin protrusion: 0.25 mm.
Figure 17. Drawing dimension DPAK (type STD-ST)
0068772/G
LD1117xx Package mechanical data
Doc ID 2572 Rev 28 33/42
Figure 18. Drawing dimension DPAK (type Fujitsu-subcon.)
0068772/G
Package mechanical data LD1117xx
34/42 Doc ID 2572 Rev 28
Figure 19. Drawing dimension DPAK (type IDS-subcon.)
0068772/G
LD1117xx Package mechanical data
Doc ID 2572 Rev 28 35/42
Note: The DPAK package coming from the two subcontractors (Fujitsu and IDS) are fully
compatible with the ST's package suggested footprint.
Table 18. DPAK mechanical data
Dim.
Type STD-ST Type Fujitsu-subcon. Type IDS-subcon
mm. mm. mm.
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
A 2.20 2.40 2.25 2.30 2.35 2.19 2.38
A1 0.90 1.10 0.96 1.06 0.89 1.14
A2 0.03 0.23 0 0.10 0.03 0.23
b 0.64 0.90 0.76 0.86 0.64 0.88
b4 5.20 5.40 5.28 5.38 5.21 5.46
c 0.45 0.60 0.46 0.56 0.46 0.58
c2 0.48 0.60 0.46 0.56 0.46 0.58
D 6.00 6.20 6.05 6.15 5.97 6.22
D1 5.10 5.27 5.47 5.20
E 6.40 6.60 6.55 6.60 6.65 6.35 6.73
E1 4.70 4.77 4.70
e 2.28 2.23 2.28 2.33 2.28
e1 4.40 4.60 4.51 4.61
H 9.35 10.10 9.90 10.30 9.40 10.42
L 1.00 1.40 1.60 0.90
L1 2.80 2.50 2.65
L2 0.80 1.03 1.13 0.89 1.27
L4 0.60 1.00 0.70 0.90 0.64 1.02
R 0.20 0.40 0.20
V2 0° 8° 0° 8° 0° 8°
Package mechanical data LD1117xx
36/42 Doc ID 2572 Rev 28
Figure 20. DPAK footprint recommended data
Table 19. Footprint data
Values
mm. inch.
A6.700.264
B 6.70 0.64
C 1.8 0.070
D 3.0 0.118
E1.600.063
F2.300.091
G2.300.091
LD1117xx Package mechanical data
Doc ID 2572 Rev 28 37/42
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A330 12.992
C 12.813.0 13.2 0.504 0.512 0.519
D 20.2 0.795
N60 2.362
T 14.4 0.567
Ao 6.736.83 6.93 0.265 0.2690.273
Bo 7.32 7.42 7.52 0.288 0.292 0.296
Ko 1.782 0.070 0.078
Po 3.94.0 4.1 0.1530.157 0.161
P7.98.0 8.1 0.311 0.315 0.319
Tape & reel SOT223 mechanical data
Package mechanical data LD1117xx
38/42 Doc ID 2572 Rev 28
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A330 12.992
C 12.813.2 0.504 0.519
D 20.2 0.795
N60 2.362
T 22.4 0.882
Ao 8.1 8.5 0.3190.335
Bo 5.5 5.90.216 0.232
Ko 2.1 2.30.082 0.090
Po 3.94.1 0.1530.161
P7.98.1 0.311 0.319
Tape & reel SO-8 mechanical data
LD1117xx Package mechanical data
Doc ID 2572 Rev 28 39/42
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A330 12.992
C12.813.0 13.2 0.504 0.512 0.519
D 20.2 0.795
N60 2.362
T22.40.882
Ao 6.806.90 7.00 0.2680.272 0.2.76
Bo 10.40 10.50 10.60 0.4090.4130.417
Ko 2.55 2.65 2.75 0.100 0.104 0.105
Po 3.94.0 4.1 0.1530.157 0.161
P7.98.0 8.1 0.311 0.315 0.319
Tape & reel DPAK-PPAK mechanical data
Order codes LD1117xx
40/42 Doc ID 2572 Rev 28
9 Order codes
Table 20. Order codes
Packages
SOT-223 SO-8 DPAK DPAK (T & R) TO-220 Output
voltages
LD1117S12TR LD1117D12TR (1)
1. Available on request.
LD1117DT12 (1) LD1117DT12TR 1.2 V
LD1117S12CTR LD1117D12CTR (1) LD1117DT12C (1) LD1117V12C (1) 1.2 V
LD1117S18TR LD1117D18TR (1) LD1117DT18TR LD1117V18 1.8 V
LD1117S18CTR LD1117D18CTR (1) LD1117DT18CTR LD1117V18C (1) 1.8 V
LD1117S25TR LD1117D25TR (1) LD1117DT25TR 2.5 V
LD1117S25CTR LD1117D25CTR (1) LD1117DT25CTR 2.5 V
LD1117S30TR 3 V
LD1117S33TR LD1117D33TR LD1117DT33TR LD1117V33 3.3 V
LD1117S33CTR LD1117D33CTR LD1117DT33CTR LD1117V33C 3.3 V
LD1117S50TR LD1117DT50TR LD1117V50 5 V
LD1117S50CTR LD1117DT50CTR 5 V
LD1117STR LD1117DTR (1) LD1117DTTR LD1117V ADJ from
1.25 to 15V
LD1117SC-R LD1117DC-R (1) LD1117DTC (1) LD1117DTC-R LD1117VC (1) ADJ from
1.25 to 15V
LD1117xx Revision history
Doc ID 2572 Rev 28 41/42
10 Revision history
Table 21. Document revision history
Date Revision Changes
22-Sep-2004 15 Add new part number #12C; typing error: note on table 2.
25-Oct-2004 16 Add Vref reference voltage on table 12.
18-Jul-2005 17 The DPAK mechanical data updated.
25-Nov-2005 18 The TO220FM package removed.
14-Dec-2005 19 The Top on table 2 updated.
06-Dec-2006 20 DPAK mechanical data updated and added footprint data.
05-Apr-2007 21 Order codes updated.
30-Nov-2007 22 Added Ta b l e 1 .
16-Apr-2008 23 Modified: Table 20 on page 40.
08-Jul-2008 24 Added note 1. on page 7.
30-Mar-2009 25 Modified: VIN max value Table 5 on page 10 and Figure 10 on page 24.
29-Jul-2009 26 Modified: Table 20 on page 40.
03-Feb-2010 27 Modified Table 11 on page 16.
22-Mar-2010 28 Added: Table 17 on page 26, Figure 13 on page 27, Figure 14 on page 28,
Figure 15 and Figure 16 on page 29.
LD1117xx
42/42 Doc ID 2572 Rev 28
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