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,
3.3 V, 5.0 V
■ Adjustable version availability (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 (V
1.25 V). Concerning fixed versions, are offered
the following output voltages: 1.2 V, 1.8 V, 2.5 V,
2.85 V, 3.3 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
Table 1. Device summary
REF
REF
= 1.25 V)
=
LD1117xx
TO-220
SOT-223
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
Part numbers
LD1117XX12 LD1117XX25 LD1117XX50
LD1117XX12C LD1117XX25C LD1117XX50C
LD1117XX18 LD1117XX33 LD1117XX
LD1117XX18C LD1117XX33C LD1117XXC
February 2012 Doc ID 2572 Rev 31 1/41
www.st.com
41
Contents LD1117xx
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7 LD1117 adjustable: application note . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
2/41 Doc ID 2572 Rev 31
LD1117xx List of tables
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#33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 8. Electrical characteristics of LD1117#50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 9. Electrical characteristics of LD1117 (adjustable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 10. Electrical characteristics of LD1117#12C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 11. Electrical characteristics of LD1117#18C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 12. Electrical characteristics of LD1117#25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 13. Electrical characteristics of LD1117#33C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 14. Electrical characteristics of LD1117#50C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 15. Electrical characteristics of LD1117C (adjustable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 16. TO-220 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 17. DPAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table 18. Footprint data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 19. Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 20. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Doc ID 2572 Rev 31 3/41
List of figures LD1117xx
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 6. Active terminator for SCSI-2 bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 7. Circuit for increasing output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 8. Voltage regulator with reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 9. Battery backed-up regulated supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 10. Post-regulated dual supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 11. Adjustable output voltage application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 12. Adjustable output voltage application with improved ripple rejection . . . . . . . . . . . . . . . . . 24
Figure 13. Drawing dimension TO-220 (type STD-ST Dual Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 14. Drawing dimension TO-220 (type STD-ST Single Gauge) . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 15. Drawing dimension tube for TO-220 Dual Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 16. Drawing dimension tube for TO-220 Single Gauge (mm.) . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 17. Drawing dimension DPAK (type STD-ST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 18. Drawing dimension DPAK (type Fujitsu-subcon.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 19. Drawing dimension DPAK (type IDS-subcon.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 20. DPAK footprint recommended data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
4/41 Doc ID 2572 Rev 31
LD1117xx Diagram
1 Diagram
Figure 1. Block diagram
Doc ID 2572 Rev 31 5/41
Pin configuration LD1117xx
2 Pin configuration
Figure 2. Pin connections (top view)
SOT-223
DPAK
Note: The TAB is connected to the V
OUT
SO-8
TO-220
.
6/41 Doc ID 2572 Rev 31
LD1117xx Maximum ratings
3 Maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
(1)
V
IN
P
TOT
T
STG
T
OP
DC input voltage 15 V
Power dissipation 12 W
Storage temperature range -40 to +150 °C
for C version -40 to +125 °C
Operating junction temperature range
for standard version 0 to +125 °C
1. Absolute maximum rating of VIN = 18 V, when I
is lower than 20 mA.
OUT
Table 3. Thermal data
Symbol Parameter SOT-223 SO-8 DPAK TO-220 Unit
R
R
Thermal resistance junction-case 15 20 8 5 °C/W
thJC
Thermal resistance junction-ambient 50 °C/W
thJA
Doc ID 2572 Rev 31 7/41
Schematic application LD1117xx
4 Schematic application
Figure 3. Application circuit (for 1.2 V)
Figure 4. Application circuit (for other fixed output voltages)
8/41 Doc ID 2572 Rev 31
LD1117xx Electrical characteristics
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
V
O
V
O
ΔV
O
ΔV
O
ΔV
O
ΔV
O
V
in
I
adj
ΔI
adj
I
O(min)
I
O
eN Output noise (%V
SVR Supply voltage rejection
V
d
Output voltage Vin = 3.2 V, IO = 10 mA, TJ = 25 °C 1.188 1.20 1.212 V
= 10 to 800 mA
I
Output voltage
O
- VO = 1.4 to 10 V
V
in
1.140 1.20 1.260 V
Line regulation Vin - VO = 1.5 to 13.75 V, IO = 10 mA 0.035 0.2 %
Load regulation Vin - VO = 3 V, IO = 10 to 800 mA 0.1 0.4 %
Temperature stability 0.5 %
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
Operating input voltage 15 V
Adjustment pin current Vin ≤ 15 V 60 120 µA
- VO = 1.4 to 10 V
V
Adjustment pin current change
in
= 10 to 800 mA
I
O
15µA
Minimum load current Vin = 15 V 2 5 mA
Output current Vin - VO = 5 V, TJ = 25 °C 800 950 1300 mA
) B = 10 Hz to 10 kHz, TJ = 25 °C 0.003 %
O
= 40 mA, f = 120 Hz, TJ = 25 °C
I
Dropout voltage
Thermal regulation T
O
V
- VO = 3 V, V
in
= 100 mA 1 1.1
I
O
= 500 mA 1.05 1.15
O
= 800 mA 1.10 1.2
I
O
= 25 °C, 30 ms Pulse 0.01 0.1 %/W
a
ripple
= 1 V
PP
60 75 dB
VI
Doc ID 2572 Rev 31 9/41
Electrical characteristics LD1117xx
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
V
O
V
O
ΔV
O
ΔV
O
ΔV
O
ΔV
O
V
in
I
d
I
O
eN Output noise voltage B = 10 Hz to 10 kHz, T
SVR Supply voltage rejection
V
d
Output voltage Vin = 3.8 V, IO = 10 mA, TJ = 25 °C 1.78 1.8 1.82 V
Output voltage IO = 0 to 800 mA, Vin = 3.3 to 8 V 1.76 1.84 V
Line regulation Vin = 3.3 to 8 V, IO = 0 mA 1 6 mV
Load regulation Vin = 3.3 V, IO = 0 to 800 mA 1 10 mV
Temperature stability 0.5 %
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
Operating input voltage IO = 100 mA 15 V
Quiescent current Vin ≤ 8 V 5 10 mA
Output current Vin = 6.8 V, TJ = 25 °C 800 950 1300 mA
= 25 °C 100 µV
J
= 40 mA, f = 120 Hz, TJ = 25 °C
I
Dropout voltage
O
V
= 5.5 V, V
in
= 100 mA 1 1.1
I
O
= 500 mA 1.05 1.15
O
ripple
= 1 V
PP
60 75 dB
VI
IO = 800 mA 1.10 1.2
Thermal regulation T
= 25 °C, 30 ms Pulse 0.01 0.1 %/W
a
10/41 Doc ID 2572 Rev 31
LD1117xx Electrical characteristics
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
V
O
V
O
ΔV
O
ΔV
O
ΔV
O
ΔV
O
V
in
I
d
I
O
eN Output noise voltage B = 10 Hz to 10 kHz, T
SVR Supply voltage rejection
V
d
Output voltage Vin = 4.5 V, IO = 10 mA, TJ = 25 °C 2.475 2.5 2.525 V
Output voltage IO = 0 to 800 mA, Vin = 3.9 to 10 V 2.45 2.55 V
Line regulation Vin = 3.9 to 10 V, IO = 0 mA 1 6 mV
Load regulation Vin = 3.9 V, IO = 0 to 800 mA 1 10 mV
Temperature stability 0.5 %
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
Operating input voltage IO = 100 mA 15 V
Quiescent current Vin ≤ 10 V 5 10 mA
Output current Vin = 7.5 V TJ = 25 °C 800 950 1300 mA
= 25 °C 100 µV
J
= 40 mA, f = 120 Hz, TJ = 25 °C
I
Dropout voltage
O
V
= 5.5 V, V
in
= 100 mA 1 1.1
I
O
= 500 mA 1.05 1.15
O
ripple
= 1 V
PP
60 75 dB
VI
IO = 800 mA 1.10 1.2
Thermal regulation T
= 25 °C, 30 ms Pulse 0.01 0.1 %/W
a
Doc ID 2572 Rev 31 11/41
Electrical characteristics LD1117xx
Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 7. Electrical characteristics of LD1117#33
Symbol Parameter Test condition Min. Typ. Max. Unit
V
O
V
O
ΔV
O
ΔV
O
ΔV
O
ΔV
O
V
in
I
d
I
O
eN Output noise voltage B = 10 Hz to 10 kHz, T
SVR Supply voltage rejection
V
d
Output voltage Vin = 5.3 V, IO = 10 mA, TJ = 25 °C 3.267 3.3 3.333 V
Output voltage IO = 0 to 800 mA, Vin = 4.75 to 10 V 3.235 3.365 V
Line regulation Vin = 4.75 to 15 V, IO = 0 mA 1 6 mV
Load regulation Vin = 4.75 V, IO = 0 to 800 mA 1 10 mV
Temperature stability 0.5 %
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
Operating input voltage IO = 100 mA 15 V
Quiescent current Vin ≤ 15 V 5 10 mA
Output current Vin = 8.3 V, TJ = 25 °C 800 950 1300 mA
= 25 °C 100 µV
J
= 40 mA, f = 120 Hz, TJ = 25 °C
I
Dropout voltage
O
V
= 6.3 V, V
in
= 100 mA 1 1.1
I
O
= 500 mA 1.05 1.15
O
ripple
= 1 V
PP
60 75 dB
VI
IO = 800 mA 1.10 1.2
Thermal regulation T
= 25 °C, 30 ms Pulse 0.01 0.1 %/W
a
12/41 Doc ID 2572 Rev 31
LD1117xx Electrical characteristics
Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 8. Electrical characteristics of LD1117#50
Symbol Parameter Test condition Min. Typ. Max. Unit
V
O
V
O
ΔV
O
ΔV
O
ΔV
O
ΔV
O
V
in
I
d
I
O
eN Output noise voltage B = 10 Hz to 10 kHz, T
SVR Supply voltage rejection
V
d
Output voltage Vin = 7 V, IO = 10 mA, TJ = 25 °C 4.95 5 5.05 V
Output voltage IO = 0 to 800 mA, Vin = 6.5 to 15 V 4.9 5.1 V
Line regulation Vin = 6.5 to 15 V, IO = 0 mA 1 10 mV
Load regulation Vin = 6.5 V, IO = 0 to 800 mA 1 15 mV
Temperature stability 0.5 %
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
Operating input voltage IO = 100 mA 15 V
Quiescent current Vin ≤ 15 V 5 10 mA
Output current Vin = 10 V, TJ = 25 °C 800 950 1300 mA
= 25 °C 100 µV
J
= 40 mA, f = 120 Hz, TJ = 25 °C
I
Dropout voltage
O
V
= 8 V, V
in
= 100 mA 1 1.1
I
O
= 500 mA 1.05 1.15
O
ripple
= 1 V
PP
60 75 dB
VI
IO = 800 mA 1.10 1.2
Thermal regulation T
= 25 °C, 30 ms Pulse 0.01 0.1 %/W
a
Doc ID 2572 Rev 31 13/41
Electrical characteristics LD1117xx
Refer to the test circuits, TJ = 0 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 9. Electrical characteristics of LD1117 (adjustable)
Symbol Parameter Test condition Min. Typ. Max. Unit
V
V
ΔV
ΔV
ΔV
ΔV
ΔI
I
O(min)
Reference voltage Vin - VO = 2 V, IO = 10 mA, TJ = 25 °C 1.238 1.25 1.262 V
ref
Reference voltage IO = 10 to 800 mA, Vin - VO = 1.4 to 10 V 1.225 1.275 V
ref
Line regulation Vin - VO = 1.5 to 13.75 V, IO = 10 mA 0.035 0.2 %
O
Load regulation Vin - VO = 3 V, IO = 10 to 800 mA 0.1 0.4 %
O
Temperature stability 0.5 %
O
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
O
V
Operating input voltage 15 V
in
I
Adjustment pin current Vin ≤ 15 V 60 120 µA
adj
Adjustment pin current change Vin - VO = 1.4 to 10 V, IO = 10 to 800 mA 1 5 µA
adj
Minimum load current Vin = 15 V 2 5 mA
I
Output current Vin - VO = 5 V, TJ = 25 °C 800 950 1300 mA
O
eN Output noise (%VO) B = 10 Hz to 10 kHz, TJ = 25 °C 0.003 %
SVR Supply voltage rejection
Dropout voltage
V
d
O
- VO = 3 V, V
V
in
= 100 mA 1 1.1
I
O
= 500 mA 1.05 1.15
O
I
= 800 mA 1.10 1.2
O
ripple
= 1 V
PP
60 75 dB
= 40 mA, f = 120 Hz, TJ = 25 °C
I
Thermal regulation Ta = 25 °C, 30 ms Pulse 0.01 0.1 %/W
VI
14/41 Doc ID 2572 Rev 31
LD1117xx Electrical characteristics
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 10. Electrical characteristics of LD1117#12C
Symbol Parameter Test condition Min. Typ. Max. Unit
V
O
V
O
ΔV
O
ΔV
O
ΔV
O
ΔV
O
V
in
I
adj
ΔI
adj
I
O(min)
I
O
eN Output noise (%V
SVR Supply voltage rejection
V
d
Output voltage Vin - VO = 2 V, IO = 10 mA, TJ = 25 °C 1.176 1.20 1.224 V
Output voltage IO = 10 to 800 mA, Vin - VO = 1.4 to 10 V 1.120 1.20 1.280 V
Line regulation Vin - VO = 1.5 to 13.75 V, IO = 10 mA 1 %
Load regulation Vin - VO = 3 V, IO = 10 to 800 mA 1 %
Temperature stability 0.5 %
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
Operating input voltage 15 V
Adjustment pin current Vin ≤ 15 V 60 120 µA
Adjustment pin current
change
Vin - VO = 1.4 to 10 V
= 10 to 800 mA
I
O
15µA
Minimum load current Vin = 15 V 2 5 mA
Output current Vin - VO = 5 V, TJ = 25 °C 800 950 1300 mA
) B = 10 Hz to 10 kHz, TJ = 25 °C 0.003 %
O
= 40 mA, f = 120 Hz, TJ = 25 °C
I
Dropout voltage
O
V
- VO = 3 V, V
in
= 100 mA, TJ = 0 to 125 °C 1 1.1
I
O
= 500 mA, TJ = 0 to 125 °C 1.05 1.2
O
ripple
= 1 V
PP
60 75 dB
VI
IO = 800 mA, TJ = 0 to 125 °C 1.10 1.3
Thermal regulation T
= 25 °C, 30 ms Pulse 0.01 0.1 %/W
a
Doc ID 2572 Rev 31 15/41
Electrical characteristics LD1117xx
Refer to the test circuits, TJ = -40 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 11. Electrical characteristics of LD1117#18C
Symbol Parameter Test condition Min. Typ. Max. Unit
V
O
V
O
ΔV
O
ΔV
O
ΔV
O
ΔV
O
V
in
I
d
I
O
eN Output noise voltage B = 10 Hz to 10 kHz, T
SVR Supply voltage rejection
V
d
Output voltage Vin = 3.8 V, IO = 10 mA, TJ = 25 °C 1.76 1.8 1.84 V
Output voltage IO = 0 to 800 mA, Vin = 3.9 to 10 V 1.73 1.87 V
Line regulation Vin = 3.3 to 8 V, IO = 0 mA 1 30 mV
Load regulation Vin = 3.3 V, IO = 0 to 800 mA 1 30 mV
Temperature stability 0.5 %
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
Operating input voltage IO = 100 mA 15 V
Quiescent current Vin ≤ 8 V 5 10 mA
Output current Vin = 6.8 V TJ = 25 °C 800 950 1300 mA
= 25 °C 100 µV
J
= 40 mA, f = 120 Hz, TJ = 25 °C
I
Dropout voltage
O
V
= 5.5 V, V
in
= 100 mA, TJ = 0 to 125 °C 1 1.1
I
O
= 500 mA, TJ = 0 to 125 °C 1.05 1.15
O
ripple
= 1 V
PP
60 75 dB
VI
IO = 800 mA, TJ = 0 to 125 °C 1.10 1.2
= 100 mA 1.1
I
O
V
d
Dropout voltage
= 500 mA 1.2
O
VI
IO = 800 mA 1.3
Thermal regulation T
= 25 °C, 30 ms Pulse 0.01 0.1 %/W
a
16/41 Doc ID 2572 Rev 31
LD1117xx Electrical characteristics
Refer to the test circuits, TJ = -40 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 12. Electrical characteristics of LD1117#25C
Symbol Parameter Test condition Min. Typ. Max. Unit
V
O
V
O
ΔV
O
ΔV
O
ΔV
O
ΔV
O
V
in
I
d
I
O
eN Output noise voltage B = 10 Hz to 10 kHz, T
SVR Supply voltage rejection
V
d
Output voltage Vin = 4.5 V, IO = 10 mA, TJ = 25 °C 2.45 2.5 2.55 V
Output voltage IO = 0 to 800 mA, Vin = 3.9 to 10 V 2.4 2.6 V
Line regulation Vin = 3.9 to 10 V, IO = 0 mA 1 30 mV
Load regulation Vin = 3.9 V, IO = 0 to 800 mA 1 30 mV
Temperature stability 0.5 %
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
Operating input voltage IO = 100 mA 15 V
Quiescent current Vin ≤ 10 V 5 10 mA
Output current Vin = 7.5 V TJ = 25 °C 800 950 1300 mA
= 25 °C 100 µV
J
= 40 mA, f = 120 Hz, TJ = 25 °C
I
Dropout voltage
O
V
= 5.5 V, V
in
= 100 mA, TJ = 0 to 125 °C 1 1.1
I
O
= 500 mA, TJ = 0 to 125 °C 1.05 1.15
O
ripple
= 1 V
PP
60 75 dB
VI
IO = 800 mA, TJ = 0 to 125 °C 1.10 1.2
= 100 mA 1.1
I
O
V
d
Dropout voltage
= 500 mA 1.2
O
VI
IO = 800 mA 1.3
Thermal regulation T
= 25 °C, 30 ms Pulse 0.01 0.1 %/W
a
Doc ID 2572 Rev 31 17/41
Electrical characteristics LD1117xx
Refer to the test circuits, TJ = -40 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 13. Electrical characteristics of LD1117#33C
Symbol Parameter Test condition Min. Typ. Max. Unit
V
O
V
O
ΔV
O
ΔV
O
ΔV
O
ΔV
O
V
in
I
d
I
O
eN Output noise voltage B = 10 Hz to 10 kHz, T
SVR Supply voltage rejection
V
d
Output voltage Vin = 5.3 V, IO = 10 mA, TJ = 25 °C 3.24 3.3 3.36 V
Output voltage IO = 0 to 800 mA, Vin = 4.75 to 10 V 3.16 3.44 V
Line regulation Vin = 4.75 to 15 V, IO = 0 mA 1 30 mV
Load regulation Vin = 4.75 V, IO = 0 to 800 mA 1 30 mV
Temperature stability 0.5 %
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
Operating input voltage IO = 100 mA 15 V
Quiescent current Vin ≤ 15 V 5 10 mA
Output current Vin = 8.3 V, TJ = 25 °C 800 950 1300 mA
= 25 °C 100 µV
J
= 40 mA, f = 120 Hz, TJ = 25 °C
I
Dropout voltage
O
V
= 6.3 V, V
in
= 100 mA, TJ = 0 to 125 °C 1 1.1
I
O
= 500 mA, TJ = 0 to 125 °C 1.05 1.15
O
ripple
= 1 V
PP
60 75 dB
VI
IO = 800 mA, TJ = 0 to 125 °C 1.10 1.2
= 100 mA 1.1
I
O
V
d
Dropout voltage
= 500 mA 1.2
O
VI
IO = 800 mA 1.3
Thermal regulation T
= 25 °C, 30 ms Pulse 0.01 0.1 %/W
a
18/41 Doc ID 2572 Rev 31
LD1117xx Electrical characteristics
Refer to the test circuits, TJ = -40 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 14. Electrical characteristics of LD1117#50C
Symbol Parameter Test condition Min. Typ. Max. Unit
V
O
V
O
ΔV
O
ΔV
O
ΔV
O
ΔV
O
V
in
I
d
I
O
eN Output noise voltage B = 10 Hz to 10 kHz, T
SVR Supply voltage rejection
V
d
Output voltage Vin = 7 V, IO = 10 mA, TJ = 25 °C 4.9 5 5.1 V
Output voltage IO = 0 to 800 mA, Vin = 6.5 to 15 V 4.8 5.2 V
Line regulation Vin = 6.5 to 15 V, IO = 0 mA 1 50 mV
Load regulation Vin = 6.5 V, IO = 0 to 800 mA 1 50 mV
Temperature stability 0.5 %
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
Operating input voltage IO = 100 mA 15 V
Quiescent current Vin ≤ 15 V 5 10 mA
Output current Vin = 10 V, TJ = 25 °C 800 950 1300 mA
= 25 °C 100 µV
J
= 40 mA, f = 120 Hz, TJ = 25 °C
I
Dropout voltage
O
V
= 8 V, V
in
= 100 mA, TJ = 0 to 125 °C 1 1.1
I
O
= 500 mA, TJ = 0 to 125 °C 1.05 1.15
O
ripple
= 1 V
PP
60 75 dB
VI
IO = 800 mA, TJ = 0 to 125 °C 1.10 1.2
= 100 mA 1.1
I
O
V
d
Dropout voltage
= 500 mA 1.2
O
VI
IO = 800 mA 1.3
Thermal regulation T
= 25 °C, 30 ms Pulse 0.01 0.1 %/W
a
Doc ID 2572 Rev 31 19/41
Electrical characteristics LD1117xx
Refer to the test circuits, TJ = -40 to 125 °C, CO = 10 µF, unless otherwise specified.
Table 15. Electrical characteristics of LD1117C (adjustable)
Symbol Parameter Test condition Min. Typ. Max. Unit
V
V
ΔV
ΔV
ΔV
ΔV
ΔI
I
O(min)
Reference voltage Vin - VO = 2 V, IO = 10 mA, TJ = 25 °C 1.225 1.25 1.275 V
ref
Reference voltage IO = 10 to 800 mA, Vin - VO= 1.4 to 10 V 1.2 1.3 V
ref
Line regulation Vin - VO = 1.5 to 13.75 V, IO = 10 mA 1 %
O
Load regulation Vin - VO = 3 V, IO = 10 to 800 mA 1 %
O
Temperature stability 0.5 %
O
Long term stability 1000 hrs, TJ = 125 °C 0.3 %
O
V
Operating input voltage 15 V
in
I
Adjustment pin current Vin ≤ 15 V 60 120 µA
adj
Adjustment pin current change Vin - VO = 1.4 to 10 V, IO = 10 to 800 mA 1 10 µA
adj
Minimum load current Vin = 15 V 2 5 mA
I
Output current Vin - VO = 5 V, TJ = 25 °C 800 950 1300 mA
O
eN Output noise (%VO) B = 10 Hz to 10 kHz, TJ = 25 °C 0.003 %
= 40 mA, f = 120 Hz, TJ = 25 °C
I
SVR Supply voltage rejection
Dropout voltage
V
d
V
Dropout voltage
d
Thermal regulation T
O
- VO = 3 V, V
V
in
= 100 mA, TJ = 0 to 125 °C 1 1.1
I
O
= 500 mA, TJ = 0 to 125 °C 1.05 1.15
O
I
= 800 mA, TJ = 0 to 125 °C 1.10 1.2
O
= 100 mA 1.1
I
O
= 500 mA 1.2
O
I
= 800 mA 1.3
O
= 25 °C, 30 ms Pulse 0.01 0.1 %/W
a
ripple
= 1 V
PP
60 75 dB
VI
VI
20/41 Doc ID 2572 Rev 31
LD1117xx Typical application
6 Typical application
Figure 5. Negative supply
Figure 6. Active terminator for SCSI-2 bus
Figure 7. Circuit for increasing output voltage
Doc ID 2572 Rev 31 21/41
Typical application LD1117xx
Figure 8. Voltage regulator with reference
Figure 9. Battery backed-up regulated supply
22/41 Doc ID 2572 Rev 31
LD1117xx Typical application
Figure 10. Post-regulated dual supply
Doc ID 2572 Rev 31 23/41
LD1117 adjustable: application note LD1117xx
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. I
R
is normally fixed to 120 Ω. From
1
V
OUT
= V
REF
+ R2 (I
ADJ
In normal application R
be considered in the V
V
OUT
= V
(1 + R2 / R1).
REF
is 60 µA typ. (120 µA max.) and ΔI
ADJ
Figure 10
+IR1) = V
value is in the range of few kΩ, so the R2 x I
2
calculation; then the above expression becomes:
OUT
REF
+ R2 (I
In order to have the better load regulation it is important to realize a good Kelvin connection
of R
and R2 resistors. In particular R1 connection must be realized very close to OUT and
1
ADJ pin, while R
ground connection must be placed as near as possible to the negative
2
Load pin. Ripple rejection can be improved by introducing a 10 µF electrolytic capacitor
placed in parallel to the R
Figure 11. Adjustable output voltage application
resistor (see
2
we obtain:
+V
ADJ
Figure 11
REF
).
/R1) = V
is 1 µA typ. (5 µA max.).
ADJ
(1 + R2 / R1) + R2 x I
REF
product could not
ADJ
ADJ
.
Figure 12. Adjustable output voltage application with improved ripple rejection
24/41 Doc ID 2572 Rev 31
LD1117xx Package mechanical data
8 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
®
ECOPACK
specifications, grade definitions and product status are available at:
ECOPACK
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
www.st.com
Table 16. TO-220 mechanical data
Type STD - ST Dual Gauge Type STD - ST Single Gauge
Dim.
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
mm. mm.
.
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
In spite of some difference in tolerances, the packages are compatible.
Doc ID 2572 Rev 31 25/41
Package mechanical data LD1117xx
Figure 13. Drawing dimension TO-220 (type STD-ST Dual Gauge)
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.
26/41 Doc ID 2572 Rev 31
0015988_S
LD1117xx Package mechanical data
Figure 14. Drawing dimension TO-220 (type STD-ST Single Gauge)
8174627_B
Doc ID 2572 Rev 31 27/41
Package mechanical data LD1117xx
Figure 15. Drawing dimension tube for TO-220 Dual Gauge (mm.)
Figure 16. Drawing dimension tube for TO-220 Single Gauge (mm.)
28/41 Doc ID 2572 Rev 31
LD1117xx Package mechanical data
SOT-223 mechanical data
mm. mils.
Dim.
Min. Typ. Max. Min. Typ. Max.
A1.8 70.9
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 0.35 9.4 10.2 13.8
D6.3 6.5 6.7 248.0 255.9 263.8
e2.390.6
e1 4.6 181.1
E 3.33.5 3.7 129.9 137.8 145.7
H6.77 7.3 263.8 275.7 287.5
V 10° 10°
0046067/H
Doc ID 2572 Rev 31 29/41
Package mechanical data LD1117xx
SO-8 mechanical data
Dim.
Min. Typ. Max. Min. Typ. Max.
mm. inch.
A1.35 1.75 0.053 0.069
A1 0.10 0.25 0.04 0.010
A2 1.10 1.65 0.043 0.065
B0.33 0.51 0.013 0.020
C0.19 0.25 0.007 0.010
D4.80 5.00 0.189 0.197
E 3.80 4.00 0.150 0.157
e 1.27 0.050
H5.80 6.20 0.228 0.244
h 0.25 0.50 0.010 0.020
L 0.40 1.27 0.016 0.050
k 8° (max.)
ddd 0.1 0.04
30/41 Doc ID 2572 Rev 31
0016023/C
LD1117xx Package mechanical data
Figure 17. Drawing dimension DPAK (type STD-ST)
Note: 1 Maximum resin gate protrusion: 0.5 mm.
2 Maximum resin protrusion: 0.25 mm.
0068772/G
Doc ID 2572 Rev 31 31/41
Package mechanical data LD1117xx
Figure 18. Drawing dimension DPAK (type Fujitsu-subcon.)
32/41 Doc ID 2572 Rev 31
0068772/G
LD1117xx Package mechanical data
Figure 19. Drawing dimension DPAK (type IDS-subcon.)
0068772/G
Doc ID 2572 Rev 31 33/41
Package mechanical data LD1117xx
Table 17. DPAK mechanical data
Type STD-ST Type Fujitsu-subcon. Type IDS-subcon
Dim.
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°
Note: The DPAK package coming from the two subcontractors (Fujitsu and IDS) are fully
compatible with the ST's package suggested footprint.
34/41 Doc ID 2572 Rev 31
LD1117xx Package mechanical data
Figure 20. DPAK footprint recommended data
Table 18. Footprint data
Val ues
mm. inch.
A 6.70 0.264
B6.700.64
C1.80.070
D3.00.118
E 1.60 0.063
F 2.30 0.091
G 2.30 0.091
Doc ID 2572 Rev 31 35/41
Package mechanical data LD1117xx
Tape & reel SOT223 mechanical data
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A 330 12.992
C 12.8 13.0 13.2 0.504 0.512 0.519
D 20.2 0.79 5
N60 2.362
T 14.4 0.567
Ao 6.73 6.83 6.93 0.265 0.269 0.273
Bo 7.32 7.42 7.52 0.288 0.292 0.296
Ko 1.78 2 0.070 0.078
Po 3.9 4.0 4.1 0.153 0.157 0.161
P7.98.0 8.1 0.311 0.315 0.319
36/41 Doc ID 2572 Rev 31
LD1117xx Package mechanical data
Tape & reel SO-8 mechanical data
mm. inch.
Dim.
Min. Typ. Max. Min. Typ. Max.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.79 5
N60 2.362
T 22.4 0.882
Ao 8.1 8.5 0.319 0.335
Bo 5.5 5.9 0.216 0.232
Ko 2.1 2.3 0.082 0.090
Po 3.9 4.1 0.153 0.161
P7.98.1 0.311 0.319
Doc ID 2572 Rev 31 37/41
Package mechanical data LD1117xx
Tape & reel DPAK-PPAK mechanical data
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A 330 12.992
C12.8 13.0 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 0.268 0.272 0.2.76
Bo 10.40 10.50 10.60 0.409 0.413 0.417
Ko 2.55 2.65 2.75 0.100 0.104 0.105
Po 3.9 4.0 4.1 0.153 0.157 0.161
P7.98.0 8.1 0.311 0.315 0.319
38/41 Doc ID 2572 Rev 31
LD1117xx Order codes
9 Order codes
Table 19. Order codes
Packages
SOT-223 SO-8 DPAK
(1)
LD1117S12TR LD1117D12TR
LD1117S12CTR LD1117D12CTR
LD1117S18TR LD1117D18TR
LD1117S18CTR LD1117D18CTR
LD1117S25TR LD1117D25TR
LD1117S25CTR LD1117D25CTR
LD1117DT12
(1)
LD1117DT12C
(1)
(1)
(1)
(1)
DPAK
(tape and reel)
(1)
LD1117DT12TR 1.2 V
(1)
LD1117DT12CTR LD1117V12C
TO-220
(1)
LD1117DT18TR LD1117V18 1.8 V
LD1117DT18CTR LD1117V18C
(1)
LD1117DT25TR 2.5 V
LD1117DT25CTR 2.5 V
Output
voltages
1.2 V
1.8 V
LD1117S33TR LD1117D33TR LD1117DT33TR LD1117V33 3.3 V
LD1117V33-DG
(2)
3.3 V
LD1117S33CTR LD1117D33CTR LD1117DT33CTR LD1117V33C 3.3 V
LD1117S50TR LD1117DT50TR LD1117V50 5 V
LD1117V50-DG
(2)
5 V
LD1117S50CTR LD1117DT50CTR LD1117V50C 5 V
(2)
ADJ from
1.25 to 15V
ADJ from
1.25 to 15V
LD1117STR LD1117DTTR LD1117V
LD1117V-DG
LD1117SC-R LD1117DC-R
1. Available on request.
2. TO-220 Dual Gauge frame.
(1)
LD1117DTC
(1)
LD1117DTC-R LD1117VC
(1)
ADJ from
1.25 to 15V
Doc ID 2572 Rev 31 39/41
Revision history LD1117xx
10 Revision history
Table 20. 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 V
reference voltage on table 12.
ref
18-Jul-2005 17 The DPAK mechanical data updated.
25-Nov-2005 18 The TO220FM package removed.
14-Dec-2005 19 The T
on table 2 updated.
op
06-Dec-2006 20 DPAK mechanical data updated and added footprint data.
05-Apr-2007 21 Order codes updated.
30-Nov-2007 22 Added
16-Apr-2008 23 Modified:
08-Jul-2008 24 Added note
30-Mar-2009 25 Modified: V
29-Jul-2009 26 Modified:
03-Feb-2010 27 Modified
22-Mar-2010 28
15-Nov-2010 29 Modified: R
30-Nov-2011 30 Added: order code LD1117V33-DG
13-Feb-2012 31 Added: order codes LD1117V50-DG and LD1117V-DG
Ta bl e 1
Added:
Figure 15
.
Table 19 on page 39
1. on page 7
max value
IN
Table 19 on page 39
Table 10 on page 15
.
.
Table 5 on page 10
.
.
and
Figure 10 on page 23
Table 16 on page 25, Figure 13 on page 26, Figure 14 on page 27
and
Figure 16 on page 28
value for TO-220
thJC
.
Table 3 on page 7
.
Table 19 on page 39
Table 19 on page 39
.
,
.
.
40/41 Doc ID 2572 Rev 31
LD1117xx
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Doc ID 2572 Rev 31 41/41
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