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LM317 数据表(PDF) 3 Page - Texas Instruments

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部件名 LM317
功能描述  3-TERMINAL ADJUSTABLE REGULATOR
Download  22 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

LM317 数据表(HTML) 3 Page - Texas Instruments

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Recommended Operating Conditions
Electrical Characteristics
LM317
3-TERMINAL ADJUSTABLE REGULATOR
SLVS044R – SEPTEMBER 1997 – REVISED APRIL 2007
MIN
MAX
UNIT
VI – VO
Input-to-output differential voltage
3
40
V
IO
Output current
1.5
A
TJ
Operating virtual junction temperature
0
125
°C
over recommended ranges of operating virtual junction temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS(1)
MIN
TYP
MAX
UNIT
TJ = 25°C
0.01
0.04
Line regulation(2)
VI – VO = 3 V to 40 V
%/V
TJ = 0°C to 125°C
0.02
0.07
VO ≤ 5 V
25
mV
CADJ = 10 µF,(3)
TJ = 25°C
VO ≥ 5 V
0.1
0.5
%VO
Load regulation
IO = 10 mA to 1500 mA
VO ≤ 5 V
20
70
mV
TJ = 0°C to 125°C
VO ≥ 5 V
0.3
1.5
%VO
Thermal regulation
20-ms pulse,
TJ = 25°C
0.03
0.07
%VO/W
ADJUST terminal current
50
100
µA
Change in
VI – VO = 2.5 V to 40 V, PD ≤ 20 W, IO = 10 mA to 1500 mA
0.2
5
µA
ADJUST terminal current
Reference voltage
VI – VO = 3 V to 40 V, PD ≤ 20 W, IO = 10 mA to 1500 mA
1.2
1.25
1.3
V
Output-voltage
TJ = 0°C to 125°C
0.7
%VO
temperature stability
Minimum load current
VI – VO = 40 V
3.5
10
mA
to maintain regulation
VI – VO ≤ 15 V,
PD < PMAX(4)
1.5
2.2
Maximum output current
A
VI – VO ≤ 40 V,
PD < PMAX (4),
TJ = 25°C
0.15
0.4
RMS output noise voltage
f = 10 Hz to 10 kHz,
TJ = 25°C
0.003
%VO
(% of VO)
CADJ = 0 µF(3)
57
Ripple rejection
VO = 10 V,
f = 120 Hz
dB
CADJ = 10 µF(3)
62
64
Long-term stability
TJ = 25°C
0.3
1
%/1k hr
(1)
Unless otherwise noted, the following test conditions apply: |VI – VO| = 5 V and IOMAX = 1.5 A, TJ = 0°C to 125°C. Pulse testing
techniques are used to maintain the junction temperature as close to the ambient temperature as possible.
(2)
Line regulation is expressed here as the percentage change in output voltage per 1-V change at the input.
(3)
CADJ is connected between the ADJUST terminal and GND.
(4)
Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
3
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