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PDF ( 数据手册 , 数据表 ) LD1086xx

零件编号 LD1086xx
描述 1.5A Low drop positive voltage regulator adjustable and fixed
制造商 STMicroelectronics
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LD1086xx 数据手册, 描述, 功能
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LD1086xx
1.5A Low drop positive voltage regulator adjustable and fixed
Features
Typical dropout 1.3V at 1.5A
Three terminal adjustable or fixed output
voltage 1.5V, 1.8V, 2.5V, 3.3V, 3.6V, 5V, 8V,
9V, 12V.
Guaranteed output current up to 1.5A
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
Pinout compatibility with standard adjustable
VREG
Description
The LD1086 is a LOW DROP voltage regulator
able to provide up to 1.5A of output current.
Dropout is guaranteed at a maximum of 1.2V at
the maximum output current, decreasing at lower
loads. The LD1086 is pin to pin compatible with
the older 3-terminal adjustable regulators, but has
better performances in term of drop and output
tolerance.
A 2.85V output version is suitable for SCSI-2
active termination. Unlike PNP regulators, where
a part of the output current is wasted as quiescent
current, the LD1086 quiescent current flows into
TO-220
DPAK
D2PAK
D2PAK/A
the load, so increase efficiency. Only a 10µF
minimum capacitor is need for stability. The
device is supplied in TO-220, D2PAK, D2PAK/A
and DPAK. On chip trimming allows the regulator
to reach a very tight output voltage tolerance,
within ±1% at 25°C.
Table 1. Device summary
July 2007
LD1086XX
LD1086XX12
LD1086XX15
LD1086XX18
LD1086XX25
Part number
Rev. 18
LD1086XX33
LD1086XX36
LD1086XX50
LD1086XX80
LD1086XX90
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LD1086xx pdf, 数据表
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Electrical characteristics
LD1086xx
Table 5.
Symbol
Electrical characteristics of LD1086#18
(VI=4.8V, CI = CO =10μF, TA = -40 to 125°C, unless otherwise specified).
Parameter
Test
Min. Typ.
Max.
Unit
VO
ΔVO
ΔVO
Vd
Iq
Isc
SVR
eN
S
Output voltage (1)
IO = 0 mA, TJ = 25°C
IO = 0 to 1.5A, VI = 3.4 to 30V
Line regulation
IO = 0 mA, VI = 3.4 to 18V, TJ = 25°C
IO = 0 mA, VI = 3.4 to 15V
Load regulation
IO = 0 to 1.5A, TJ = 25°C
IO = 0 to 1.5A
Dropout voltage
IO = 1.5A
Quiescent current
VI 30V
Short circuit current
VI - VO = 5V
VI - VO = 25V
Thermal regulation
TA = 25°C, 30ms pulse
Supply voltage rejection
f = 120 Hz, CO = 25 μF, IO = 1.5A
VI = 6.8 ± 3V
RMS Output noise voltage (% of
VO)
TA = 25°C, f =10Hz to 10KHz
Temperature stability
1.782
1.764
1.5
0.05
60
S Long term stability
TA = 125°C, 1000Hrs
1. See short-circuit current curve for available output current at fixed dropout.
1.8 1.818
1.8 1.836
0.2 4
0.4 4
0.5 8
1 16
1.3 1.5
5 10
2
0.02
0.01 0.04
82
0.003
0.5
0.5
V
V
mV
mV
mV
mV
V
mA
A
A
%/W
dB
%
%
%
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LD1086xx equivalent, schematic
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Electrical characteristics
LD1086xx
Table 13.
Symbol
Electrical characteristics of LD1086#
(VI=4.25V, CI = CO =10μF, TA = -40 to 125°C, unless otherwise specified).
Parameter
Test
Min. Typ.
Max.
Unit
VO
ΔVO
ΔVO
Vd
IO(min)
Isc
SVR
IADJ
ΔIADJ
eN
S
Output voltage (1)
Line Regulation
Load Regulation
Dropout Voltage
Minimum Load Current
Short Circuit Current
Thermal Regulation
Supply Voltage Rejection
Adjust Pin Current
Adjust Pin Current Change (1)
RMS Output Noise Voltage (%
of VO)
Temperature Stability
IO = 10mA TJ = 25°C
IO = 10mA to 1.5A, VI = 2.85 to 30V
IO = 10mA, VI = 2.8 to 16.5V,
TJ = 25°C
IO = 10mA, VI = 2.8 to 16.5V
IO = 10mA to 1.5A, TJ = 25°C
IO = 0 to 1.5A
IO = 1.5A
VI = 30V
VI - VO = 5V
VI - VO = 25V
TA = 25°C, 30ms pulse
f = 120 Hz, CO = 25 μF,CADJ = 25 μF,
IO = 1.5A, VI = 6.25 ± 3V
VI = 4.25V, IO = 10 mA
IO = 10mA to 1.5A, VI = 2.8 to 16.5V
1.237
1.225
1.5
0.05
60
TA = 25°C, f =10Hz to 10KHz
S Long Term Stability
TA = 125°C, 1000Hrs
1. See short-circuit current curve for available output current at fixed dropout.
1.25 1.263
1.25 1.275
0.015 0.2
0.035 0.2
0.1 0.3
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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