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LD1085D2M28 bảng dữ liệu(PDF) 8 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  3A LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS
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LD1085 SERIES
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Table 13: Electrical Characteristics Of LD1085#12 (VI=15V, CI = CO =10µF, TA = -40 to 125°C, unless
otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
Table 14: Electrical Characteristics Of LD1085# (VI=4.25V, CI = CO =10µF, TA = -40 to 125°C, unless
otherwise specified.)
NOTE 1: See short-circuit current curve for available output current at fixed dropout.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VO
Output Voltage
IO = 0 mA TJ = 25°C
11.88
12
12.12
V
IO = 0 to 3AVI = 13.8 to 30V (note 1)
11.76
12
12.24
V
∆VO
Line Regulation
IO = 0 mA VI = 13.8 to 25V TJ = 25°C
1
25
mV
IO = 0 mA VI = 13.8 to 25V
2
25
mV
∆VO
Load Regulation
IO = 0 to 3ATJ = 25°C
12
36
mV
IO = 0 to 3A
24
72
mV
Vd
Dropout Voltage
IO =3 A
1.3
1.5
V
Iq
Quiescent Current
VI ≤ 30V
5
10
mA
Isc
Short Circuit Current
VI - VO = 5V
3.2
4.5
A
VI - VO = 25V
0.2
0.5
A
Thermal Regulation
TA = 25°C, 30ms pulse
0.008
0.04
%/W
SVR
Supply Voltage Rejection
f = 120 Hz, CO = 25 µF,
IO = 3A
VI = 17 ± 3V
54
66
dB
eN
RMS Output Noise Voltage
(% of VO)
TA = 25°C f =10Hz to 10KHz
0.003
%
S
Temperature Stability
0.5
%
S
Long Term Stability
TA = 125°C 1000Hrs
0.5
%
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VO
Output Voltage
IO = 10mA TJ = 25°C
1.237
1.25
1.263
V
IO = 10mA to 5AVI = 2.85 to 30V (note 1)
1.225
1.25
1.275
V
∆VO
Line Regulation
IO = 10mA VI = 2.85 to 16.5V TJ = 25°C
0.015
0.2
%
IO = 10mA VI = 2.85 to 16.5V
0.035
0.2
%
∆VO
Load Regulation
IO = 10mA to 5ATJ = 25°C
0.1
0.3
%
IO = 0 to 5A
0.2
0.4
%
Vd
Dropout Voltage
IO = 5A
1.3
1.5
V
IO(min)
Minimum Load Current
VI = 30V
3
10
mA
Isc
Short Circuit Current
VI - VO = 5V
5.5
6.5
A
VI - VO = 25V
0.5
0.7
A
Thermal Regulation
TA = 25°C, 30ms pulse
0.003
0.015
%/W
SVR
Supply Voltage Rejection
f = 120 Hz, CO = 25 µF, CADJ = 25 µF,
IO = 5A
VI = 6.25 ± 3V
60
72
dB
IADJ
Adjust Pin Current
VI = 4.25V IO = 10 mA
55
120
µA
∆IADJ Adjust Pin Current Change IO = 10mA to 5A
VI = 2.85 to 16.5V
(note 1)
0.2
5
µA
eN
RMS Output Noise Voltage
(% of VO)
TA = 25°C f =10Hz to 10KHz
0.003
%
S
Temperature Stability
0.5
%
S
Long Term Stability
TA = 125°C 1000Hrs
0.5
%


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