8181 查看數據表（PDF） - Allegro MicroSystems
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8181 Datasheet PDF : 8 Pages
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8181
LOW-DROPOUT,
5 V REGULATOR
IN 7
IN 8
FUNCTIONAL BLOCK DIAGRAM
15 OUT
16 OUT
ENABLE 6
BIAS
12-13
DRIVE
ERROR
AMP
BANDGAP
REF.
4-5
Dwg. FS-012
MAXIMUM ALLOWABLE OUTPUT CURRENT with device mounted on 2.24" x 2.24"
(56.9 mm x 56.9 mm) solder-coated copper-clad board in still air.
Maximum Allowable Output Current in Milliamperes with VI = 10 V, TJ = 150°C*
dc (Duty Cycle)
TA
100%
90%
80%
70%
60%
50%
40%
30%
20%
25°C
370
415
465
530
620
745
930
1000
1000
50°C
295
330
370
425
495
595
745
995
1000
70°C
235
265
295
340
395
475
595
795
1000
85°C
190
215
240
275
320
385
485
645
970
* IO = (TJ - TA)/([VI - VO] RθJA • dc) = (150 - TA)/(5 • 67 • dc)
Output current rating can be increased (to 1 A maximum) by heat sinking or reducing the input voltage. With an infinite heat sink, R-JA = R-JT =
6°C/W. Conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated
but should be avoided.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1992, 1995 Allegro MicroSystems, Inc.
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