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LM237 Scheda tecnica(PDF) 4 Page - Texas Instruments

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Il numero della parte LM237
Spiegazioni elettronici  3-TERMINAL ADJUSTABLE REGULATORS
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LM237, LM337
3-TERMINAL ADJUSTABLE REGULATORS
SLVS047G – NOVEMBER 1981 – REVISED SEPTEMBER 2003
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics, TJ = 25°C
PARAMETER
TEST CONDITIONS†
LM237, LM337
UNIT
PARAMETER
TEST CONDITIONS†
MIN
TYP
MAX
UNIT
Input regulation‡
VI – VO = –3 V to –40 V
0.01
0.04
%/V
Ripple rejection
VO = –10 V,
f = 120 HZ
60
dB
Ripple rejection
VO = –10 V,
CADJ = 10 µF,
f = 120 HZ
66
77
dB
Output regulation
IO = 10 mA to 1.5 A
|VO| ≤ 5 V
50
mV
Output regulation
IO = 10 mA to 1.5 A
|VO| ≥ 5 V
0.3%
1%
Output noise voltage
f = 10 HZ to 10 kHZ
0.003%
Minimum output current to maintain regulation
|VI – VO| ≤ 40 V
2.5
10
mA
Minimum output current to maintain regulation
|VI – VO| ≤ 10 V
1.5
6
mA
Peak output current
|VI – VO| ≤ 15 V
1.5
2.2
A
Peak output current
|VI – VO| ≤ 40 V
0.15
0.4
A
Adjustment-terminal current
65
100
µA
Change in adjustment-terminal current
VI – VO = – 2.5 V to –40 V,
IO = 10 mA to MAX
2
5
µA
Reference voltage (output to ADJ)
VI – VO = – 3 V to –40 V,
IO = 10 mA to 1.5 A,
P
≤ rated dissipation
–1.213
–1.25
–1.287
V
† Unless otherwise noted, these specifications apply for the following test conditions |VI – VO| = 5 V and IO = 0.5 A. All characteristics are measured
with a 0.1-
µF capacitor across the input and a 1-µF capacitor across the output. Pulse-testing techniques are used to maintain the junction
temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately.
‡ Input regulation is expressed here as the percentage change in output voltage per 1-V change at the input.


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