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PDF ( 数据手册 , 数据表 ) LD1086

零件编号 LD1086
描述 1.5A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
制造商 ST Microelectronics
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LD1086 数据手册, 描述, 功能
LD1086
1.5 A adjustable and fixed low drop positive voltage regulator
TO-220
DPAK
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, 12 V
Automotive grade (adjustable VOUT in TO-220
and DPAK packages only)
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 (4 x 4 mm)
Pinout compatibility with standard adjustable
voltage regulators
Datasheet - production data
Description
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 mm) 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.
December 2014
This is information on a product in full production.
DocID6739 Rev 33
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LD1086 pdf, 数据表
Schematic application
4 Schematic application
Figure 3. Application circuit
LD1086
VO
=
VREF
1
+
RR-----21-
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LD1086 equivalent, schematic
Electrical characteristics
LD1086
VI = 4.25 V, CI = CO =10 µF, TA = -40 to 125 °C, unless otherwise specified.
Table 10. Electrical characteristics of LD1086DTTRY and LD1086VY (Automotive grade)
Symbol
Parameter
Test condition
Min. Typ. Max. Unit
Vref Reference voltage (1)
ΔVO
ΔVO
Vd
IO(min)
Line regulation
Load regulation
Dropout voltage
Minimum load current
Isc Short circuit current
Thermal regulation
SVR Supply voltage rejection
IADJ
ΔIADJ
eN
S
Adjust pin current
Adjust pin current change (1)
RMS output noise voltage
(% of VO)
Temperature stability
IO = 10 mA TA = 25 °C
IO = 10 mA to 1.5 A, VI = 2.85 to 30 V
IO = 10 mA, VI = 2.8 to 16.5 V
IO = 0 to 1.5 A
IO = 1.5 A
VI = 30 V
VI - VO = 5 V, TA = 25 °C
VI - VO = 25 V, TA = 25 °C
TA = 25 °C, 30 ms pulse
f = 120 Hz, CO = 25 µF,CADJ = 25 µF,
IO = 1.5 A, VI = 6.25 ± 3 V, TA = 25 °C
VI = 4.25 V, IO = 10 mA
IO = 10 mA to 1.5 A, VI = 2.8 to 16.5 V
1.237
1.225
1.5
0.05
60
TA = 25 °C, f =10 Hz to 10 kHz
S Long term stability
TA = 125 °C, 1000 Hrs
1. See short-circuit current curve for available output current at fixed dropout.
1.25 1.263
1.25 1.275
0.035 0.2
0.2 0.4
1.3 1.5
3 10
2.3
0.2
0.01 0.04
88
40 120
0.2 5
0.003
0.5
0.5
V
V
%
%
V
mA
A
A
%/W
dB
μA
μA
%
%
%
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