LD1086
1.5 A adjustable and fixed low drop positive voltage regulator
Datasheet - production data
Description
DPAK
TO-220
D²PAK
DFN8 (4x4)
D²PAK/A
Features
• Typical dropout: 1.3 V at 1.5 A
• Three-terminal adjustable or fixed output
voltage: 1.8 V, 2.5 V, 3.3 V, 5 V
• Automotive grade (adjustable VOUT in TO-220
and DPAK packages only)
The LD1086 is a low drop voltage regulator
capable of providing up to 1.5 A of output current.
Dropout is guaranteed at a maximum of 1.2 V at
the maximum output current, decreasing at lower
loads. The LD1086 is pin-to-pin compatible with
older 3-terminal adjustable regulators, but has
better performance in terms of drop and output
tolerance. Unlike PNP regulators, where a part of
the output current is wasted as quiescent current,
the LD1086 quiescent current flows into the load,
increasing efficiency. Only a 10 µF (minimum)
capacitor is needed for stability. The device is
available in a TO-220, D²PAK, D²PAK/A, DPAK or
DFN8 (4x4) package. On-chip trimming allows the
regulator to reach a very tight output voltage
tolerance; within ± 1% at 25 °C. The LD1086 is
available as automotive grade for adjustable
output voltages in the TO-220 and DPAK
packages. The PAT, SYL, SBL statistical tests
have been performed, and the devices are
qualified according to the AEC-Q100 specification
for the automotive market in the temperature
range of - 40 °C to 125 °C.
• Output current guaranteed up to 1.5 A
• Output tolerance: ± 1% at 25 °C and ± 2% in full
temperature range
• Internal power and thermal limit
• Wide operating temperature range - 40 °C to
125 °C
• Package available: TO-220, D²PAK, D²PAK/A,
DPAK and DFN8 (4x4)
• Pinout compatibility with standard adjustable
voltage regulators
May 2021
This is information on a product in full production.
DocID6739 Rev 37
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www.st.com
Contents
LD1086
Contents
1
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
Schematic application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.1
TO-220 (STD-ST dual gauge) type A package information . . . . . . . . . . . 21
7.2
DPAK package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.3
D²PAK (SMD 2L STD-ST) type A package information . . . . . . . . . . . . . . 26
7.4
D²PAK (SMD 3L STD-ST) type A package information . . . . . . . . . . . . . . 28
7.5
DPAK and D²PAK packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.6
DFN8 (4x4) package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.7
DFN8 (4x4) packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
2/40
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LD1086
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical characteristics of LD1086#18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical characteristics of LD1086#25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical characteristics of LD1086#33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Electrical characteristics of LD1086#50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Electrical characteristics of LD1086B# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electrical characteristics of LD1086# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electrical characteristics of LD1086DTTRY and LD1086VY (Automotive grade). . . . . . . . 15
TO-220 (STD-ST dual gauge) type A mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DPAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
D²PAK (SMD 2L STD-ST) type A mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
D²PAK (SMD 3L STD-ST) type A mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
DPAK and D²PAK tape and reel mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
DFN8 (4x4) mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
DFN8 (4x4) reel mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
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List of figures
LD1086
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.
Figure 32.
Figure 33.
Figure 34.
Figure 35.
Figure 36.
Figure 37.
Figure 38.
Figure 39.
4/40
Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin connections (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Output voltage vs. temp. (VI = 5 V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Output voltage vs. temp. (VI = 4.25 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Short-circuit current vs. dropout voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Line regulation vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Load regulation vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Dropout voltage vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Dropout voltage vs. output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Adjust pin current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Adjust pin current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Adjust pin current vs. output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Quiescent current vs. output current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Quiescent current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Supply voltage rejection vs. output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Supply voltage rejection vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Minimum load current vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Stability for adjustable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Stability for 2.85 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Line transient (VI = 12 to 13 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Line transient (IO = 200 mA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Line transient (CADJ = 1 µF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Load transient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Load transient (Trise = Tfall = 10 µs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
TO-220 (STD-ST dual gauge) type A package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DPAK package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
DPAK recommended footprint (dimension are in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
D²PAK (SMD 2L STD-ST) type A package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
D²PAK (SMD 3L STD-ST) type A outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
D²PAK (SMD 3L) recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
DPAK and D²PAK tape outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
DPAK and D²PAK reel outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
DFN8 (4x4) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
DFN8 (4x4) recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
DFN8 (4x4) tape outline (dimension are in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
DFN8 (4x4) reel outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
DocID6739 Rev 37
LD1086
1
Diagram
Diagram
Figure 1. Schematic diagram
DocID6739 Rev 37
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40
Pin configuration
2
LD1086
Pin configuration
Figure 2. Pin connections (top view)
TO-220
D²PAK
DPAK
D²PAK/A
NC
1
8
IN
NC
2
7
IN
ADJ/GND
3
6
NC
NC
4
5
NC
OUTPUT
AM11888v1
DFN8 (4x4)
Note:
6/40
The TAB is physically connected to the output (this is valid for the TO-220 package too).
DocID6739 Rev 37
LD1086
Maximum ratings
3
Maximum ratings
Table 1. Absolute maximum ratings
Symbol
Parameter
Value
Unit
30
V
VI
DC input voltage
IO
Output current
Internally Limited
mA
PD
Power dissipation
Internally Limited
mW
TSTG
Storage temperature range
-55 to +150
°C
TJ
Junction temperature range
-40 to +150
°C
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
Table 2. Thermal data
Symbol
Parameter
TO-220
D²PAK
D²PAK/A
DPAK
DFN8 (4x4)
Unit
RthJC
Thermal resistance junction-case
5
3
8
1.5
°C/W
RthJA
Thermal resistance junction-ambient
50
62.5
100
33
°C/W
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40
Schematic application
4
LD1086
Schematic application
Figure 3. Application circuit
R2
VO = V REF ⋅ 1 + -------
R 1
8/40
DocID6739 Rev 37
LD1086
5
Electrical characteristics
Electrical characteristics
VI = 4.8 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.
Table 3. Electrical characteristics of LD1086#18
Symbol
VO
∆VO
Parameter
Output voltage (1)
Line regulation
Test conditions
Min.
Typ.
Max.
Unit
IO = 0 mA, TJ = 25 °C
1.782
1.8
1.818
V
IO = 0 to 1.5 A, VI = 3.4 to 30 V
1.764
1.8
1.836
V
IO = 0 mA, VI = 3.4 to 18 V,
TJ = 25 °C
0.2
4
mV
IO = 0 mA, VI = 3.4 to 15 V
0.4
4
mV
IO = 0 to 1.5 A, TJ = 25 °C
0.5
8
mV
1
16
mV
∆VO
Load regulation
Vd
Dropout voltage
IO = 1.5 A
1.3
1.5
V
Iq
Quiescent current
VI ≤ 30 V
5
10
mA
Isc
Short-circuit current
IO = 0 to 1.5 A
V I - VO = 5 V
1.5
2
A
VI - VO = 25 V
0.05
0.02
A
Thermal regulation
TA = 25 °C, 30 ms pulse
Supply voltage rejection
f = 120 Hz, CO = 25 µF, IO = 1.5 A
VI = 6.8 ± 3 V
eN
RMS output noise voltage
(% of VO)
TA = 25 °C, f =10 Hz to 10 kHz
S
Temperature stability
S
Long term stability
SVR
TA = 125 °C, 1000 Hrs
0.01
60
0.04
%/W
82
dB
0.003
%
0.5
%
0.5
%
1. See short-circuit current curve for available output current at fixed dropout.
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40
Electrical characteristics
LD1086
VI = 5.5 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.
Table 4. Electrical characteristics of LD1086#25
Symbol
VO
∆VO
Parameter
Output voltage (1)
Line regulation
Test conditions
Min.
Typ.
Max.
Unit
IO = 0 mA, TJ = 25 °C
2.475
2.5
2.525
V
IO = 0 to 1.5 A, VI = 4.1 to 30 V
2.45
2.5
2.55
V
IO = 0 mA, VI = 4.1 to 18 V,
TJ = 25 °C
0.2
4
mV
IO = 0 mA, VI = 4.1 to 18 V
0.4
4
mV
IO = 0 to 1.5 A, TJ = 25 °C
0.5
8
mV
1
16
mV
∆VO
Load regulation
Vd
Dropout voltage
IO = 1.5 A
1.3
1.5
V
Iq
Quiescent current
VI ≤ 30 V
5
10
mA
Isc
Short-circuit current
IO = 0 to 1.5 A
V I - VO = 5 V
1.5
2
A
VI - VO = 25 V
0.05
0.2
A
Thermal regulation
TA = 25 °C, 30 ms pulse
Supply voltage rejection
f = 120 Hz, CO = 25 µF, IO = 1.5 A
VI = 7.5 ± 3 V
eN
RMS output noise voltage
(% of VO)
TA = 25 °C, f =10 Hz to 10 kHz
S
Temperature stability
S
Long term stability
SVR
TA = 125 °C, 1000 Hrs
1. See short-circuit current curve for available output current at fixed dropout.
10/40
DocID6739 Rev 37
0.008
60
0.04
%/W
81
dB
0.003
%
0.5
%
0.5
%
LD1086
Electrical characteristics
VI = 6.3 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.
Table 5. Electrical characteristics of LD1086#33
Symbol
VO
∆VO
Parameter
Output voltage (1)
Line regulation
Test conditions
Min.
Typ.
Max.
Unit
IO = 0 mA, TJ = 25 °C
3.267
3.3
3.333
V
IO = 0 to 1.5 A, VI = 4.9 to 30 V
3.234
3.3
3.366
V
IO = 0 mA, VI = 4.9 to 18 V,
TJ = 25 °C
0.5
6
mV
IO = 0 mA, VI = 4.9 to 18 V
1
6
mV
IO = 0 to 1.5 A, TJ = 25 °C
1
10
mV
IO = 0 to 1.5 A
7
25
mV
∆VO
Load regulation
Vd
Dropout voltage
IO = 1.5 A
1.3
1.5
V
Iq
Quiescent current
VI ≤ 30 V
5
10
mA
Isc
Short-circuit current
V I - VO = 5 V
1.5
2
A
VI - VO = 25 V
0.05
0.2
A
Thermal regulation
TA = 25 °C, 30 ms pulse
Supply voltage rejection
f = 120 Hz, CO = 25 µF, IO = 1.5 A
VI = 8.3 ± 3 V
eN
RMS output noise voltage
(% of VO)
TA = 25 °C, f =10 Hz to 10 kHz
S
Temperature stability
S
Long term stability
SVR
TA = 125 °C, 1000 Hrs
0.008
60
0.04
%/W
79
dB
0.003
%
0.5
%
0.5
%
1. See short-circuit current curve for available output current at fixed dropout.
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Electrical characteristics
LD1086
VI = 8 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.
Table 6. Electrical characteristics of LD1086#50
Symbol
VO
∆VO
Parameter
Output voltage (1)
Line regulation
Test conditions
Min.
Typ.
Max.
Unit
IO = 0 mA, TJ = 25 °C
4.95
5
5.05
V
IO = 0 to 1.5 A, VI = 6.6 to 30 V
4.9
5
5.1
V
IO = 0 mA, VI = 6.6 to 20V,
TJ = 25 °C
0.5
10
mV
IO = 0 mA, VI = 6.6 to 20 V
1
10
mV
IO = 0 to 1.5 A, TJ = 25 °C
5
20
mV
IO = 0 to 1.5 A
10
35
mV
∆VO
Load regulation
Vd
Dropout voltage
IO = 1.5 A
1.3
1.5
V
Iq
Quiescent current
VI ≤ 30 V
5
10
mA
Isc
Short-circuit current
V I - VO = 5 V
1.5
2
A
VI - VO = 25 V
0.05
0.2
A
Thermal regulation
TA = 25 °C, 30 ms pulse
Supply voltage rejection
f = 120 Hz, CO = 25 µF, IO = 1.5 A
VI = 10 ± 3 V
eN
RMS output noise voltage
(% of VO)
TA = 25 °C, f =10 Hz to 10 kHz
S
Temperature stability
S
Long term stability
SVR
TA = 125 °C, 1000 Hrs
1. See short-circuit current curve for available output current at fixed dropout.
12/40
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0.01
60
0.04
%/W
75
dB
0.003
%
0.5
%
0.5
%
LD1086
Electrical characteristics
VI = 4.25 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.
Table 7. Electrical characteristics of LD1086B#
Symbol
Parameter
Vref
Reference voltage
∆VO
Line regulation
(1)
Test conditions
Min.
Typ.
Max.
Unit
IO = 10 mA TJ = 25 °C
1.231
1.25
1.269
V
IO = 10 mA to 1.5 A, VI = 2.85 to
30 V
1.219
1.25
1.281
V
IO = 10 mA, VI = 2.8 to 16.5 V,
TJ = 25 °C
0.015
0.2
%
IO = 10 mA, VI = 2.8 to 16.5 V
0.035
0.2
%
IO = 10 mA to 1.5 A, TJ = 25 °C
0.1
0.3
%
IO = 0 to 1.5 A
0.2
0.4
%
∆VO
Load regulation
Vd
Dropout voltage
IO = 1.5 A
1.3
1.5
V
Minimum load current
VI = 30 V
3
10
mA
IO(min)
Isc
Short-circuit current
V I - VO = 5 V
1.5
2.3
A
VI - VO = 25 V
0.05
0.2
A
Thermal regulation
TA = 25 °C, 30 ms pulse
SVR
Supply voltage rejection
f = 120 Hz, CO = 25 µF,CADJ = 25 µF,
IO = 1.5 A, VI = 6.25 ± 3 V
IADJ
Adjust pin current
VI = 4.25 V, IO = 10 mA
40
120
µA
∆IADJ
Adjust pin current change (1)
IO = 10 mA to 1.5 A, VI = 2.8 to
16.5 V
0.2
5
µA
eN
RMS output noise voltage
(% of VO)
TA = 25 °C, f =10 Hz to 10 kHz
0.003
%
S
Temperature stability
0.5
%
S
Long term stability
0.5
%
TA = 125 °C, 1000 Hrs
0.01
60
0.04
88
%/W
dB
1. See short-circuit current curve for available output current at fixed dropout.
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Electrical characteristics
LD1086
VI = 4.25 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.
Table 8. Electrical characteristics of LD1086#
Symbol
Parameter
Vref
Reference voltage
∆VO
Line regulation
(1)
Test conditions
Min.
Typ.
Max.
Unit
IO = 10 mA TJ = 25 °C
1.237
1.25
1.263
V
IO = 10 mA to 1.5 A, VI = 2.85 to
30 V
1.225
1.25
1.275
V
IO = 10 mA, VI = 2.8 to 16.5 V,
TJ = 25 °C
0.015
0.2
%
IO = 10 mA, VI = 2.8 to 16.5 V
0.035
0.2
%
IO = 10 mA to 1.5 A, TJ = 25 °C
0.1
0.3
%
IO = 0 to 1.5 A
0.2
0.4
%
∆VO
Load regulation
Vd
Dropout voltage
IO = 1.5 A
1.3
1.5
V
Minimum load current
VI = 30 V
3
10
mA
IO(min)
Isc
Short-circuit current
V I - VO = 5 V
1.5
2.3
A
VI - VO = 25 V
0.05
0.2
A
Thermal regulation
TA = 25 °C, 30 ms pulse
SVR
Supply voltage rejection
f = 120 Hz, CO = 25 µF,CADJ = 25 µF,
IO = 1.5 A, VI = 6.25 ± 3 V
IADJ
Adjust pin current
VI = 4.25 V, IO = 10 mA
40
120
µA
∆IADJ
Adjust pin current change (1)
IO = 10 mA to 1.5 A, VI = 2.8 to
16.5 V
0.2
5
µA
eN
RMS output noise voltage
(% of VO)
TA = 25 °C, f =10 Hz to 10 kHz
0.003
%
S
Temperature stability
0.5
%
S
Long term stability
0.5
%
TA = 125 °C, 1000 Hrs
1. See short-circuit current curve for available output current at fixed dropout.
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0.01
60
0.04
88
%/W
dB
LD1086
Electrical characteristics
VI = 4.25 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.
Table 9. Electrical characteristics of LD1086DTTRY and LD1086VY (Automotive grade)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
IO = 10 mA TA = 25 °C
1.237
1.25
1.263
V
IO = 10 mA to 1.5 A, VI = 2.85 to 30 V
1.225
1.25
1.275
V
0.035
0.2
%
Vref
Reference voltage (1)
∆VO
Line regulation
IO = 10 mA, VI = 2.8 to 16.5 V
∆VO
Load regulation
IO = 0 to 1.5 A
0.2
0.4
%
Vd
Dropout voltage
IO = 1.5 A
1.3
1.5
V
Minimum load current
VI = 30 V
3
10
mA
IO(min)
Isc
Short-circuit current
VI - VO = 5 V, TA = 25 °C
1.5
2.3
A
VI - VO = 25 V, TA = 25 °C
0.05
0.2
A
Thermal regulation
TA = 25 °C, 30 ms pulse
SVR
Supply voltage rejection
f = 120 Hz, CO = 25 µF,CADJ = 25 µF,
IO = 1.5 A, VI = 6.25 ± 3 V, TA = 25 °C
IADJ
Adjust pin current
∆IADJ
Adjust pin current change
eN
RMS output noise voltage
(% of VO)
S
Temperature stability
S
Long term stability
(1)
0.01
60
0.04
88
%/W
dB
VI = 4.25 V, IO = 10 mA
40
120
µA
IO = 10 mA to 1.5 A, VI = 2.8 to 16.5 V
0.2
5
µA
TA = 25 °C, f =10 Hz to 10 kHz
TA = 125 °C, 1000 Hrs
0.003
%
0.5
%
0.5
%
1. See short-circuit current curve for available output current at fixed dropout.
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Typical application
6
LD1086
Typical application
Unless otherwise specified TJ = 25 °C, CI = CO = 10 µF.
Figure 4. Output voltage vs. temp. (VI = 5 V)
Figure 5. Output voltage vs. temp. (VI = 4.25 V)
Figure 6. Short-circuit current vs. dropout
voltage
Figure 7. Line regulation vs. temperature
Figure 8. Load regulation vs. temperature
Figure 9. Dropout voltage vs. temperature
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LD1086
Typical application
Figure 10. Dropout voltage vs. output current
Figure 11. Adjust pin current vs. input voltage
Figure 12. Adjust pin current vs. input voltage Figure 13. Adjust pin current vs. output current
Figure 14. Quiescent current vs. output current
Figure 15. Quiescent current vs. input voltage
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40
Typical application
LD1086
Figure 16. Supply voltage rejection vs. output
current
Figure 17. Supply voltage rejection vs.
frequency
Figure 18. Supply voltage rejection vs.
temperature
Figure 19. Minimum load current vs.
temperature
Figure 20. Stability for adjustable
Figure 21. Stability for 2.85 V
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LD1086
Typical application
Figure 22. Line transient (VI = 12 to 13 V)
VI = 12 to 13 V, IO = 200 mA, CI = 1 µF (tant), CO = 10 µF
(tant), No CADJ
Figure 23. Line transient (IO = 200 mA)
VI = 12 to 13 V, IO = 200 mA, CI = 1 µF (tant), CO = 10 µF
(tant), No CADJ
Figure 24. Line transient (CADJ = 1 µF)
VI = 12 to 13 V, IO = 200 mA, CI = 1 µF (tant), CO = 10 µF
(tant), CADJ = 1 µF
Figure 25. Load transient
VI = 13 V, IO = 0.1 to 1.5 A, CI = 1 µF (tant), CO = 10 µF (tant)
CADJ = 1 µF
Figure 26. Load transient (Trise = Tfall = 10 µs)
VI = 13 V, IO = 0.1 to 1.5 A, CI = 1 µF (tant), CO = 10 µF
(tant), CADJ = 1 µF
Figure 27. Thermal protection
VO = 2.85 V
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Package information
7
LD1086
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.
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LD1086
7.1
Package information
TO-220 (STD-ST dual gauge) type A package information
Figure 28. TO-220 (STD-ST dual gauge) type A package outline
BW\SH$B5HYB7
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Package information
LD1086
Table 10. TO-220 (STD-ST dual gauge) type A mechanical data
mm
Dim.
Min.
Typ.
A
4.40
4.60
b
0.61
0.88
b1
1.14
1.70
c
0.48
0.70
D
15.25
15.75
D1
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Max.
1.27
E
10
10.40
e
2.40
2.70
e1
4.95
5.15
F
1.23
1.32
H1
6.20
6.60
J1
2.40
2.72
L
13
14
L1
3.50
3.93
L20
16.40
L30
28.90
∅P
3.75
3.85
Q
2.65
2.95
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LD1086
7.2
Package information
DPAK package information
Figure 29. DPAK package outline
0068772_K
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Package information
LD1086
Table 11. DPAK mechanical data
mm
Dim.
Min.
Typ.
A
2.20
2.40
A1
0.90
1.10
A2
0.03
0.23
b
0.64
0.90
b4
5.20
5.40
c
0.45
0.60
c2
0.48
0.60
D
6.00
6.20
D1
E
5.10
6.40
6.60
E1
4.70
e
2.28
e1
4.40
4.60
H
9.35
10.10
L
1.00
1.50
(L1)
2.80
L2
0.80
L4
0.60
1.00
R
V2
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Max.
0.20
0°
8°
DocID6739 Rev 37
LD1086
Package information
Figure 30. DPAK recommended footprint (dimension are in mm)
Footprint_REV_K
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Package information
7.3
LD1086
D²PAK (SMD 2L STD-ST) type A package information
Figure 31. D²PAK (SMD 2L STD-ST) type A package outline
0079457_T
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LD1086
Package information
Table 12. D²PAK (SMD 2L STD-ST) type A mechanical data
mm
Dim.
Min.
Typ.
Max.
A
4.40
4.60
A1
0.03
0.23
b
0.70
0.93
b2
1.14
1.70
c
0.45
0.60
c2
1.23
1.36
D
8.95
9.35
D1
7.50
E
10
E1
8.50
10.40
e
2.54
e1
4.88
5.28
H
15
15.85
J1
2.49
2.69
L
2.29
2.79
L1
1.27
1.40
L2
1.30
1.75
R
V2
0.4
0°
8°
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Package information
7.4
LD1086
D²PAK (SMD 3L STD-ST) type A package information
Figure 32. D²PAK (SMD 3L STD-ST) type A outline
7106164_E
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Package information
Table 13. D²PAK (SMD 3L STD-ST) type A mechanical data
mm
Dim.
Min.
Typ.
Max.
A
4.40
4.60
A1
0.03
0.23
b
0.70
0.93
b1
0.80
1.30
b2
1.14
1.70
c
0.45
0.60
c2
1.23
1.36
D
8.95
9.35
D1
7.50
E
10
E1
8.50
10.40
e
2.54
e1
4.88
5.28
H
15
15.85
J1
2.49
2.69
L
2.29
2.79
L1
1.27
1.40
R
V2
0.4
0°
8°
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40
Package information
LD1086
Figure 33. D²PAK (SMD 3L) recommended footprint
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LD1086
7.5
Package information
DPAK and D²PAK packing information
Figure 34. DPAK and D²PAK tape outline
10 pitches cumulative
tolerance on tape +/- 0.2 mm
T
P0
Top cover
tape
P2
D
E
F
B1
K0
For machine ref. only
including draft and
radii concentric around B0
W
B0
A0
P1
D1
User direction of feed
R
Bending radius
User direction of feed
AM08852v1
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40
Package information
LD1086
Figure 35. DPAK and D²PAK reel outline
T
REEL DIMENSIONS
40mm min.
Access hole
At sl ot location
B
D
C
N
A
Full radius
G measured at hub
Tape slot
in core for
tape start 25 mm min.
width
AM08851v2
Table 14. DPAK and D²PAK tape and reel mechanical data
Tape
Reel
mm
mm
Dim.
Dim.
Min.
Max.
A0
6.8
7
A
B0
10.4
10.6
B
1.5
12.1
C
12.8
1.6
D
20.2
G
16.4
50
B1
32/40
Min.
Max.
330
13.2
D
1.5
D1
1.5
E
1.65
1.85
N
F
7.4
7.6
T
K0
2.55
2.75
P0
3.9
4.1
Base qty.
2500
P1
7.9
8.1
Bulk qty.
2500
P2
1.9
2.1
R
40
T
0.25
0.35
W
15.7
16.3
DocID6739 Rev 37
18.4
22.4
LD1086
7.6
Package information
DFN8 (4x4) package information
Figure 36. DFN8 (4x4) package outline
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40
Package information
LD1086
Table 15. DFN8 (4x4) mechanical data
mm.
Dim.
Min.
Typ.
Max.
A
0.80
0.90
1
A1
0
0.02
0.05
A3
0,20
b
0.23
0.30
0.38
D
3.90
4
4.10
D2
2.82
3
3.23
E
3.90
4
4.10
E2
2.05
2.20
2.30
e
L
0.80
0.40
0.50
Figure 37. DFN8 (4x4) recommended footprint
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LD1086
7.7
Package information
DFN8 (4x4) packing information
Figure 38. DFN8 (4x4) tape outline (dimension are in mm)
7279936
Table 16. DFN8 (4x4) reel mechanical data
mm.
Dim.
Min.
Typ.
A
inch.
Max.
Min.
330
13.0
13.2
12.8
D
20.2
0.795
N
60
2.362
22.4
DocID6739 Rev 37
Max.
12.992
C
T
Typ.
0.504
0.512
0.519
0.882
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40
Package information
LD1086
Figure 39. DFN8 (4x4) reel outline
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LD1086
8
Ordering information
Ordering information
Table 17. Order code
Packages
TO-220
D²PAK
LD1086V18-DG
LD1086D2T18TR
LD1086V33-DG
LD1086D2T33TR
D²PAK/A
LD1086D2M33TR
LD1086D2T50TR
LD1086V-DG
LD1086D2TTR
LD1086D2MTR
LD1086VY (1)
LD1086BV-DG
LD1086BD2TTR
LD1086BD2MTR
DPAK
DFN8 (4x4)
Output
voltages
LD1086DT18TR
1.8 V
LD1086DT25TR
2.5 V
LD1086DT33TR
3.3 V
LD1086DT50TR
5.0 V
LD1086DTTR
LD1086PUR
ADJ
LD1086DTTRY (2)
ADJ
LD1086BDTTR
ADJ
1. Automotive grade products.
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Revision history
9
LD1086
Revision history
Table 18. Document revision history
Date
Revision
16-May-2006
14
Order codes updated and new template.
19-Jan-2007
15
D²PAK mechanical data updated and add footprint data.
05-Apr-2007
16
Order codes updated.
07-Jun-2007
17
Order codes updated.
19-Jul-2007
18
Add note on Figure 2.
03-Dec-2007
19
Modified: Table 18.
31-Jan-2008
20
Added new order codes for Automotive grade products.
18-Feb-2008
21
Modified: Table 18 on page 39.
14-Jul-2008
22
Modified: Table 1 on page 7 and Table 18 on page 39.
10-Mar-2010
23
Added: Table 12 on page 26, Figure 30 on page 23, Figure 31 on page 25,
Figure 31 and Figure 32 on page 27.
15-Nov-2010
24
Modified: RthJC value for TO-220 Table 2 on page 7.
11-Jul-2011
25
Modified: Figure 24, Figure 25 on page 20 and Table 18 on page 39.
10-Feb-2012
26
Added: order code LD1086V-DG Table 18 on page 39.
15-Mar-2012
27
Added: new order code LD1086PUR Table 18 on page 39 and new package
mechanical data DFN8 (4x4 mm) Table 16 on page 36, Figure 38 on page 35,
Figure 39 on page 36, Figure 40 on page 37 and Figure 41 on page 38.
19-Oct-2012
28
Added: RthJA value for DPAK Table 2 on page 7.
13-Feb-2013
29
Modified: Output voltage in Voltage reference parameter Table 8 on page 14
and Table 10 on page 16.
01-Mar-2013
30
Modified: DFN8 (4 x 4) pin configuration Figure 2 on page 6.
31
Added Table 8: Electrical characteristics of LD1086B# and Section 7.7: DFN8
(4x4) packing information.
Updated Section 7: Package information and Table 18: Order code.
Minor text changes.
22-Oct-2013
32
RPN LD1086xx changed to LD1086.
Updated the Description in cover page.
Cancelled Table 1: Device summary.
Updated Figure 2: Pin connections (top view), Section 5: Electrical
characteristics, Section 7: Package information and Table 18: Order code.
Minor text changes.
18-Dec-2014
33
Updated Table 6.: Electrical characteristics of LD1086#50, Section 7: Package
information and Section 7.7: DFN8 (4x4) packing information.
Minor text changes.
10-Feb-2015
34
Updated Table 18: Order code.
Minor text changes.
16-Nov-2015
35
Updated Section 7: Package information and Table 18: Order code
Minor text changes.
17-Jun-2013
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Changes
DocID6739 Rev 37
LD1086
Revision history
Table 18. Document revision history (continued)
Date
Revision
Changes
19-Dec-2017
36
Updated TJ value in Table 1: Absolute maximum ratings.
17-May-2021
37
Removed 12 V options in the document.
Updated Figure 15, Figure 16, Figure 17 and Figure 18.
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LD1086
IMPORTANT NOTICE – PLEASE READ CAREFULLY
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improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on
ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order
acknowledgement.
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or
the design of Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.
ST and the ST logo are trademarks of ST. For additional information about ST trademarks, please refer to www.st.com/trademarks. All other
product or service names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2021 STMicroelectronics – All rights reserved
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