STMicroelectronics LDL1117 Datasheet
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SOT223
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LDL1117
LDL1117
Datasheet
1.2 A high PSRR low-dropout linear voltage regulator
Features
• 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
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
1
Diagram
Figure 1. Block diagram
LDL1117
Diagram
DS12022 - Rev 7 page 2/23
2
Pin configuration
Figure 2. Pin connection (top view)
LDL1117
Pin configuration
Note:
Pin name
GND
V
OUT
V
IN
The tab is connected to V
OUT
.
Table 1. Pin description
Pin number
1
2
3
Description
Ground
Output voltage
Input voltage
DS12022 - Rev 7 page 3/23
3
Typical application
Figure 3. Typical application diagram
LDL1117
LDL1117
Typical application
DS12022 - Rev 7 page 4/23
4
Note:
LDL1117
Maximum ratings
Maximum ratings
Symbol
V
IN
V
OUT
I
OUT
P
D
T
J-OP
T
J-MAX
T
STG
Table 2. Absolute maximum ratings
Parameter
Input supply voltage
Output voltage
Output current
Power dissipation
Operating junction temperature
Maximum junction temperature
Storage temperature
Value
-0.3 to 20
-0.3 to V
IN
+ 0.3
Internally limited
Internally limited
- 40 to 125
150
- 55 to 150
Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied.
W
°C
°C
°C
Unit
V
V
A
Symbol
θ
J-C
θ
J-A
Table 3. Thermal data
Parameter
Thermal resistance junction-to-case
Thermal resistance junction-to-ambient
Value
15
120
Unit
°C/W
DS12022 - Rev 7 page 5/23
5
LDL1117
Electrical characteristics
Electrical characteristics
T
J
= 25 °C, V
IN
= V
OUT
+ 1 V or 2.6 V, whichever is greater; C
IN
= 1 μF; C
OUT
= 4.7 μF; I
OUT
= 10 mA.
Table 4. Electrical characteristics
Symbol
V
V
IN
UVLO
Parameter
Operating input voltage
Turn-on threshold
Hysteresis
Test conditions Min.
2.6
-2
-3
Typ.
2.3
200
Max.
18
2.4
+2
+3
Unit
V
V mV
%
V
V
∆V
∆V
OUT
OUT
OUT
DROP
V
OUT
accuracy
Line regulation
Load regulation
I
OUT
= 10 mA, T
J
= 25 °C
I
OUT
= 10 mA, -40 °C < T
J
< 125°C
V
OUT
IN
≤ 18 V,
I
OUT
= 10 mA -40 °C < T
J
< 125 °C
I
OUT
= 10 mA to 1.2 A,
- 40 °C < T
J
< 125 °C
I
OUT
= 1.2 A, V
OUT
> 2.5 V
- 40°C < T
J
< 125 °C
0.002
5
350
0.02
15
600
%
%/V mV mV eN Output noise voltage 10 Hz to 100 kHz, I
OUT
= 100 mA 60
µV
RMS
/
V
OUT
T
SVR
I
Q
I
SC
SHDN
Supply voltage rejection
Quiescent current
Output current
Thermal shutdown
Hysteresis
V
IN
= V
OUT(NOM)
+1 V ± V
RIPPLE
V
RIPPLE
= 0.5 V, f = 120 Hz
V
IN
= V
OUT(NOM)
+1 V ± V
RIPPLE
V
RIPPLE
= 0.5 V, f = 1 kHz
V
IN
= V
OUT(NOM)
+1 V ± V
RIPPLE
V
RIPPLE
= 0.5 V, f = 100 kHz
I
OUT
= 0 mA to 1.2 A, -40 °C < T
J
< 125 °C
1.5
87
80
65
250
2
175
25
500 dB
µA
A
°C
1. V
IN
= V
OUT
+ 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
6.2
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 (V
IN
-V
OUT
) is shown in
.
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
T
J-OP
, the following formula is used:
PDMAX = 125 − TAMB / RTHJ − A
P
DMAX
should be also derated according to the maximum current allowed by the SOA protection.
(1)
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 T
A
= 25 °C.
Figure 4. Output voltage vs. temperature (V
IN
= 2.6 V,
V
OUT
= 1.2 V, no load)
Figure 5. Output voltage vs. temperature (V
V
OUT
= 1.2 V, 1200 mA)
IN
= 2.6 V,
Figure 6. Output voltage vs. temperature (V
IN
V
OUT
= 5 V, no load)
= 6 V, Figure 7. Output voltage vs. temperature (V
IN
V
OUT
= 5 V, 1200 mA)
= 6 V,
DS12022 - Rev 7 page 8/23
LDL1117
Typical characteristics
Figure 8. Line regulation vs. temperature (V
IN
= 6 to 18 V,
V
OUT
= 5 V, I
OUT
= 10 mA)
Figure 9. Line regulation vs. temperature (V
IN
= 2.5 to
18 V, V
OUT
= 1.2 V, I
OUT
= 10 mA)
0.03
0.025
0.02
0.015
0.01
0.005
0
-40 -25 0 25
Temperature [°C]
55 85 125
Figure 10. Load regulation vs. temperature (V
IN
= 6 V,
V
OUT
= 5 V, I
OUT
= 10 to 1200 mA)
Figure 11. Load regulation vs. temperature (V
IN
= 2.6 V,
V
OUT
= 1.2 V, I
OUT
= 10 to 1200 mA)
DS12022 - Rev 7 page 9/23
Figure 12. Dropout voltage vs. temperature
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)
DS12022 - Rev 7 page 10/23
Figure 16. Short-circuit current vs. dropout voltage
(V
OUT
= 5 V)
LDL1117
Typical characteristics
Figure 17. Short-circuit current vs. dropout voltage
(V
OUT
= 1.2 V)
Figure 18. SVR vs. frequency Figure 19. Output noise spectral density (V
O
= 1.2 V)
DS12022 - Rev 7 page 11/23
Figure 20. Stability plan (V
OUT
= 5 V)
LDL1117
Typical characteristics
Figure 21. Stability plan (V
OUT
= 1.2 V)
Figure 22. Turn-on time (V
OUT
= 5 V) Figure 23. Turn-on time (V
OUT
= 1.2 V)
Figure 24. Line transient (V
OUT
= 5 V)
Figure 25. Line transient (V
OUT
= 1.2 V)
DS12022 - Rev 7 page 12/23
Figure 26. Load transient (V
OUT
= 5 V)
LDL1117
Typical characteristics
Figure 27. Load transient (V
OUT
= 1.2 V)
DS12022 - Rev 7 page 13/23
8
8.1
LDL1117
Package information
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.
SOT223 package information
Figure 28. SOT223 package outline
DS12022 - Rev 7 page 14/23
Dim.
E
H
V
D e e1
A
A1
B
B1 c
Table 5. SOT223 mechanical data
Min.
mm
Typ.
0.02
0.6
2.9
0.24
6.3
3.3
6.7
0.7
3
0.26
6.5
2.3
4.6
3.5
7.0
LDL1117
SOT223 package information
Max.
1.8
0.1
0.85
3.15
0.35
6.7
3.7
7.3
10º
DS12022 - Rev 7 page 15/23
8.2
LDL1117
SOT223 packing information
Dim.
E
W
P2
P0
P1
T
D
D1
A0
B0
K0
F
SOT223 packing information
Min.
1.65
11.7
1.90
3.90
7.90
6.75
7.30
1.80
5.40
0.25
1.50
1.50
Tape
Table 6. SOT223 tape and reel mechanical data
Reel mm
Typ.
1.75
12
2
4
8
6.85
7.40
1.90
5.50
0.30
1.55
1.60
Max.
1.85
12.3
2.10
4.10
8.10
6.95
7.50
2.00
5.60
0.35
1.60
1.70
Dim.
A
N
W1
W2
W3
Basequantity pcs
Bulk quantity pcs
Min.
60
11.9
mm
Figure 29. Tape for SOT223 (dimensions are in mm)
Max.
180
12.4
18.4
15.4
1000
1000
DS12022 - Rev 7 page 16/23
DS12022 - Rev 7
Figure 30. Reel for SOT223 (dimensions are in mm)
LDL1117
SOT223 packing information
Figure 31. SOT223 reel oriented
User Direction of feed
page 17/23
LDL1117
Ordering information
9
Ordering information
Part number
LDL1117
Marking
LL12
LL15
LL18
LL25
LL30
LL33
LL50
Table 7. Order code
Order code
LDL1117S12R
LDL1117S15R
LDL1117S18R
LDL1117S25R
LDL1117S30R
LDL1117S33R
LDL1117S50R
Output voltage (V)
1.185
1.5
1.8
2.5
3.0
3.3
5.0
DS12022 - Rev 7 page 18/23
LDL1117
Revision history
Date
27-Feb-2017
30-Mar-2017
04-Jul-2017
04-Mar-2020
24-Mar-2020
03-Apr-2020
22-Jan-2021
Revision
1
2
3
4
5
6
7
Table 8. Document revision history
Changes
Initial release.
Updated features in cover page and Section 9: "Ordering information". Minor text changes.
In Table3: "Thermal data": - thermal data values changed. Minor textchanges.
Updated Figure 28. SOT223 package outline.
Updated Figure 12.
Added Section 8.2 SOT223 packing information.
,
Figure 22 , Figure 23 , Figure 24
,
.
DS12022 - Rev 7 page 19/23
LDL1117
Contents
Contents
DS12022 - Rev 7 page 20/23
LDL1117
List of tables
List of tables
DS12022 - Rev 7 page 21/23
LDL1117
List of figures
List of figures
Figure 4. Output voltage vs. temperature (V
= 1.2 V, no load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. Output voltage vs. temperature (V
= 1.2 V, 1200 mA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 6. Output voltage vs. temperature (V
= 5 V, no load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 7. Output voltage vs. temperature (V
= 5 V, 1200 mA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 8. Line regulation vs. temperature (V
= 10 mA) . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 9. Line regulation vs. temperature (V
= 10 mA) . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 10. Load regulation vs. temperature (V
= 10 to 1200 mA) . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 11. Load regulation vs. temperature (V
= 10 to 1200 mA) . . . . . . . . . . . . . . . . . . . . . 9
Figure 16. Short-circuit current vs. dropout voltage (V
= 5 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 17. Short-circuit current vs. dropout voltage (V
= 1.2 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 19. Output noise spectral density (V
DS12022 - Rev 7 page 22/23
LDL1117
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DS12022 - Rev 7 page 23/23
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