LDL1117
Datasheet
1.2 A high PSRR low-dropout linear voltage regulator
Features
•
•
•
SOT223
•
•
•
•
•
•
Input voltage from 2.5 V to 18 V
20 V AMR
Available on fixed output voltages: 1.2 V (1.185 V), 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V,
5.0 V (other options are available on request)
Guaranteed output current 1.2 A
Typical dropout 350 mV @ 1.2 A
Internal thermal, current and power limitation
High PSRR 87 dB @ 120 Hz
Operating temperature range: -40 °C to 125°C
Package SOT223
Applications
•
•
•
•
•
Consumer
Industrial
SMPS
Motherboard P.O.L.
DC-DC post-regulation
Description
Maturity status link
LDL1117
The LDL1117 provides 1.2 A of maximum current with an input voltage range from
2.5 V to 18 V, and a typical dropout voltage of 350 mV @ 1.2 A.
The high power supply rejection ratio of 87 dB at 120 Hz, rolling down to more than
40 dB at 100 kHz, makes the LDL1117 suitable for direct regulations in SMPS and
secondary linear regulations in DC-DC converters.
This device includes current limit, SOA and thermal protections.
DS12022 - Rev 7 - January 2021
For further information contact your local STMicroelectronics sales office.
www.st.com
LDL1117
Diagram
1
Diagram
Figure 1. Block diagram
DS12022 - Rev 7
page 2/23
LDL1117
Pin configuration
2
Pin configuration
Figure 2. Pin connection (top view)
Table 1. Pin description
Note:
DS12022 - Rev 7
Pin name
Pin number
Description
GND
1
Ground
VOUT
2
Output voltage
VIN
3
Input voltage
The tab is connected to VOUT.
page 3/23
LDL1117
Typical application
3
Typical application
Figure 3. Typical application diagram
LDL1117
DS12022 - Rev 7
page 4/23
LDL1117
Maximum ratings
4
Maximum ratings
Table 2. Absolute maximum ratings
Symbol
VIN
Input supply voltage
Value
Unit
-0.3 to 20
V
VOUT
Output voltage
-0.3 to VIN + 0.3
V
IOUT
Output current
Internally limited
A
Power dissipation
Internally limited
W
PD
TJ-OP
Operating junction temperature
- 40 to 125
°C
TJ-MAX
Maximum junction temperature
150
°C
- 55 to 150
°C
TSTG
Note:
Parameter
Storage temperature
Absolute maximum ratings are those values beyond which damage to the device may occur. Functional
operation under these conditions is not implied.
Table 3. Thermal data
Symbol
DS12022 - Rev 7
Parameter
Value
θJ-C
Thermal resistance junction-to-case
15
θJ-A
Thermal resistance junction-to-ambient
120
Unit
°C/W
page 5/23
LDL1117
Electrical characteristics
5
Electrical characteristics
TJ = 25 °C, VIN = VOUT + 1 V or 2.6 V, whichever is greater; CIN = 1 μF; COUT = 4.7 μF; IOUT = 10 mA.
Table 4. Electrical characteristics
Symbol
VIN
VUVLO
Parameter
Operating input voltage
Min.
2.6
2.3
Hysteresis
200
VOUT accuracy
∆VOUT
Line regulation
∆VOUT
Load regulation
VDROP
Dropout voltage (2)
Output noise voltage
ISC
Output current
TSHDN
V
2.4
V
mV
%
IOUT = 10 mA, -40 °C < TJ < 125°C
-3
+3
%
0.002
0.02
%/V
5
15
mV
350
600
mV
VOUT + 1 V (1) ≤ VIN ≤ 18 V,
IOUT = 10 mA -40 °C < TJ< 125 °C
IOUT = 10 mA to 1.2 A,
- 40 °C < TJ < 125 °C
IOUT = 1.2 A, VOUT > 2.5 V
- 40°C < TJ < 125 °C
10 Hz to 100 kHz, IOUT = 100 mA
µVRMS/
VOUT
60
87
VIN = VOUT(NOM) +1 V ± VRIPPLE
80
VRIPPLE = 0.5 V, f = 1 kHz
dB
65
VRIPPLE = 0.5 V, f = 100 kHz
Quiescent current
18
+2
VIN= VOUT(NOM) +1 V ± VRIPPLE
IQ
Unit
-2
VRIPPLE = 0.5 V, f = 120 Hz
Supply voltage rejection
Max.
IOUT = 10 mA, TJ = 25 °C
VIN = VOUT(NOM) +1 V ± VRIPPLE
SVR
Typ.
Turn-on threshold
VOUT
eN
Test conditions
IOUT = 0 mA to 1.2 A, -40 °C < TJ < 125 °C
250
1.5
2
Thermal shutdown
175
Hysteresis
25
500
µA
A
°C
1. VIN = VOUT + 1 V or 2.6 V, whichever is greater.
2. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value; this
specification does not apply for nominal output voltages below 2.5 V.
DS12022 - Rev 7
page 6/23
LDL1117
Application information
6
Application information
6.1
Thermal and short-circuit protections
The LDL1117 is self-protected from short-circuit conditions and overtemperature. When the output load is higher
than the one supported by the device, the output current rises until the limit of typically 2 A is reached. The current
limit value is dependent of the dissipated power, thanks to an additional SOA protection, so that the maximum
power is limited.
The peak current available for a defined drop voltage (VIN-VOUT) is shown in Section 7 .
The thermal protection occurs when the junction temperature reaches typically 175 °C. The IC enters the
shutdown status. As soon as the junction temperature falls again below 150 °C (typ.) the device starts working
again.
In order to calculate the maximum power that the device can dissipate, keeping the junction temperature below
TJ-OP, the following formula is used:
PDMAX = 125 − TAMB / RTHJ − A
(1)
PDMAX should be also derated according to the maximum current allowed by the SOA protection.
6.2
Input and output capacitor selection
The LDL1117 requires external capacitors to assure the regulator control loop stability.
Any good quality ceramic capacitor can be used but, the X5R and the X7R are suggested since they guarantee a
very stable combination of capacitance and ESR over the temperature range. The input/output capacitors should
be placed as close as possible to the relative pins. The LDL1117 requires an input capacitor with a minimum value
of 1 μF.
The device is also equipped with a differential thermal protection that avoid damage in case of fast thermal
gradients inside the chip. When the differential thermal protection is activated both channel and the LDO are
switched off. This protection works in auto-retry mode, the device restarts automatically when the thermal
conditions go back into the normal operating region.
This capacitor must be placed as close as possible to the input pin of the device and returned to a clean analog
ground. The control loop of the LDL1117 is designed to work with an output ceramic capacitor. Other type of
capacitors may be used, as long as they meet the requirements of minimum capacitance and equivalent series
resistance (ESR), as shown in Figure 20 and Figure 21.
To assure stability, the output capacitor must maintain its ESR and capacitance in the stable region, over the full
operating temperature range.
The suggested combination of 1 μF input and 4.7 μF output capacitors offers a good compromise among the
stability of the regulator, optimum transient response and total PCB area occupation.
DS12022 - Rev 7
page 7/23
LDL1117
Typical characteristics
7
Typical characteristics
The following plots are referred to the typical application circuit and, unless otherwise noted, at TA = 25 °C.
Figure 4. Output voltage vs. temperature (VIN = 2.6 V,
VOUT = 1.2 V, no load)
Figure 5. Output voltage vs. temperature (VIN = 2.6 V,
VOUT = 1.2 V, 1200 mA)
Figure 6. Output voltage vs. temperature (VIN = 6 V,
VOUT = 5 V, no load)
Figure 7. Output voltage vs. temperature (VIN = 6 V,
VOUT = 5 V, 1200 mA)
DS12022 - Rev 7
page 8/23
LDL1117
Typical characteristics
Figure 8. Line regulation vs. temperature (VIN = 6 to 18 V,
VOUT = 5 V, IOUT = 10 mA)
Figure 9. Line regulation vs. temperature (VIN = 2.5 to
18 V, VOUT = 1.2 V, IOUT = 10 mA)
0.03
Line Regulation [% / V]
0.025
0.02
0.015
0.01
0.005
0
-40
-25
0
25
55
85
125
Temperature [°C]
Figure 10. Load regulation vs. temperature (VIN = 6 V,
VOUT = 5 V, IOUT = 10 to 1200 mA)
DS12022 - Rev 7
Figure 11. Load regulation vs. temperature (VIN = 2.6 V,
VOUT = 1.2 V, IOUT = 10 to 1200 mA)
page 9/23
LDL1117
Typical characteristics
Figure 13. Quiescent current vs. temperature (no load)
Figure 14. Quiescent current vs. temperature (600 mA)
Figure 15. Quiescent current vs. temperature (1.2 A)
Dropout Voltage [mV]
Figure 12. Dropout voltage vs. temperature
DS12022 - Rev 7
page 10/23
LDL1117
Typical characteristics
Figure 16. Short-circuit current vs. dropout voltage
(VOUT = 5 V)
Figure 17. Short-circuit current vs. dropout voltage
(VOUT = 1.2 V)
Figure 18. SVR vs. frequency
Figure 19. Output noise spectral density (VO = 1.2 V)
DS12022 - Rev 7
page 11/23
LDL1117
Typical characteristics
Figure 20. Stability plan (VOUT = 5 V)
Figure 21. Stability plan (VOUT = 1.2 V)
Figure 22. Turn-on time (VOUT = 5 V)
Figure 23. Turn-on time (VOUT = 1.2 V)
Figure 24. Line transient (VOUT = 5 V)
Figure 25. Line transient (VOUT = 1.2 V)
DS12022 - Rev 7
page 12/23
LDL1117
Typical characteristics
Figure 26. Load transient (VOUT = 5 V)
DS12022 - Rev 7
Figure 27. Load transient (VOUT = 1.2 V)
page 13/23
LDL1117
Package information
8
Package information
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.
8.1
SOT223 package information
Figure 28. SOT223 package outline
DS12022 - Rev 7
page 14/23
LDL1117
SOT223 package information
Table 5. SOT223 mechanical data
Dim.
mm
Min.
Typ.
A
1.8
A1
0.02
0.1
B
0.6
0.7
0.85
B1
2.9
3
3.15
c
0.24
0.26
0.35
D
6.3
6.5
6.7
e
2.3
e1
4.6
E
3.3
3.5
3.7
H
6.7
7.0
7.3
V
DS12022 - Rev 7
Max.
10º
page 15/23
LDL1117
SOT223 packing information
8.2
SOT223 packing information
Table 6. SOT223 tape and reel mechanical data
Tape
Dim.
Reel
mm
mm
Dim.
Min.
Typ.
Max.
Min.
Max.
A0
6.75
6.85
6.95
A
B0
7.30
7.40
7.50
N
K0
1.80
1.90
2.00
W1
12.4
F
5.40
5.50
5.60
W2
18.4
E
1.65
1.75
1.85
W3
W
11.7
12
12.3
P2
1.90
2
2.10
Basequantity pcs
1000
P0
3.90
4
4.10
Bulk quantity pcs
1000
P1
7.90
8
8.10
T
0.25
0.30
0.35
D
1.50
1.55
1.60
D1
1.50
1.60
1.70
180
60
11.9
15.4
Figure 29. Tape for SOT223 (dimensions are in mm)
DS12022 - Rev 7
page 16/23
LDL1117
SOT223 packing information
Figure 30. Reel for SOT223 (dimensions are in mm)
Figure 31. SOT223 reel oriented
User Direction of feed
DS12022 - Rev 7
page 17/23
LDL1117
Ordering information
9
Ordering information
Table 7. Order code
Part number
LDL1117
DS12022 - Rev 7
Marking
Order code
Output voltage (V)
LL12
LDL1117S12R
1.185
LL15
LDL1117S15R
1.5
LL18
LDL1117S18R
1.8
LL25
LDL1117S25R
2.5
LL30
LDL1117S30R
3.0
LL33
LDL1117S33R
3.3
LL50
LDL1117S50R
5.0
page 18/23
LDL1117
Revision history
Table 8. Document revision history
DS12022 - Rev 7
Date
Revision
Changes
27-Feb-2017
1
Initial release.
30-Mar-2017
2
Updated features in cover page and Section 9: "Ordering information". Minor text
changes.
04-Jul-2017
3
In Table3: "Thermal data": - thermal data values changed. Minor textchanges.
04-Mar-2020
4
Updated Figure 28. SOT223 package outline.
24-Mar-2020
5
Updated Figure 12.
03-Apr-2020
6
Added Section 8.2 SOT223 packing information.
22-Jan-2021
7
Updated Figure 9, Figure 22, Figure 23, Figure 24, Figure 25, Figure 26 and
Figure 27.
page 19/23
LDL1117
Contents
Contents
1
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3
Typical application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
5
Electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.1
Thermal and short-circuit protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.2
Input and output capacitor selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8
Package information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
9
8.1
SOT223 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.2
SOT223 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
DS12022 - Rev 7
page 20/23
LDL1117
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Pin description. . . . . . . . . . . . . . . . . .
Absolute maximum ratings . . . . . . . . .
Thermal data. . . . . . . . . . . . . . . . . . .
Electrical characteristics . . . . . . . . . . .
SOT223 mechanical data . . . . . . . . . .
SOT223 tape and reel mechanical data
Order code . . . . . . . . . . . . . . . . . . . .
Document revision history . . . . . . . . . .
DS12022 - Rev 7
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. 3
. 5
. 5
. 6
15
16
18
19
page 21/23
LDL1117
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Figure 28.
Figure 29.
Figure 30.
Figure 31.
DS12022 - Rev 7
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage vs. temperature (VIN = 2.6 V, VOUT = 1.2 V, no load) . . . . . . . . . . .
Output voltage vs. temperature (VIN = 2.6 V, VOUT = 1.2 V, 1200 mA) . . . . . . . . . .
Output voltage vs. temperature (VIN = 6 V, VOUT = 5 V, no load) . . . . . . . . . . . . . .
Output voltage vs. temperature (VIN = 6 V, VOUT = 5 V, 1200 mA) . . . . . . . . . . . . .
Line regulation vs. temperature (VIN = 6 to 18 V, VOUT = 5 V, IOUT = 10 mA) . . . . . .
Line regulation vs. temperature (VIN = 2.5 to 18 V, VOUT = 1.2 V, IOUT = 10 mA) . . .
Load regulation vs. temperature (VIN = 6 V, VOUT = 5 V, IOUT = 10 to 1200 mA) . . .
Load regulation vs. temperature (VIN = 2.6 V, VOUT = 1.2 V, IOUT = 10 to 1200 mA) .
Dropout voltage vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quiescent current vs. temperature (no load) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quiescent current vs. temperature (600 mA). . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quiescent current vs. temperature (1.2 A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short-circuit current vs. dropout voltage (VOUT = 5 V) . . . . . . . . . . . . . . . . . . . . .
Short-circuit current vs. dropout voltage (VOUT = 1.2 V) . . . . . . . . . . . . . . . . . . . .
SVR vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output noise spectral density (VO = 1.2 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stability plan (VOUT = 5 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stability plan (VOUT = 1.2 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn-on time (VOUT = 5 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn-on time (VOUT = 1.2 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line transient (VOUT = 5 V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line transient (VOUT = 1.2 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Load transient (VOUT = 5 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Load transient (VOUT = 1.2 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOT223 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tape for SOT223 (dimensions are in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reel for SOT223 (dimensions are in mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOT223 reel oriented . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
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page 22/23
LDL1117
IMPORTANT NOTICE – PLEASE READ CAREFULLY
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© 2021 STMicroelectronics – All rights reserved
DS12022 - Rev 7
page 23/23