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參數(shù)資料
| 型號： | uA723N |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | PRECISION VOLTAGE REGULATORS |
| 中文描述： | 精密電壓調(diào)節(jié)器 |
| 文件頁數(shù)： | 10/17頁 |
| 文件大小： | 469K |
| 代理商： | UA723N |
μ
A723
PRECISION VOLTAGE REGULATORS
SLVS057D – AUGUST 1972 – REVISED JULY 1999
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
R2
VI
15 pF
2N5004
1 k
(see Note A)
R1
2N3997
1N4005
1 M
100
μ
F
1 k
220
0.1
μ
F
L = 1.2 mH
(see Note B)
REF
VCC+
VC
OUTPUT
VZ
CURR LIM
CURR SENS
IN+
VCC–FREQ COMP
IN–
μ
A723
NOTES: A. The device requires a minimum of 9 V between VCC+ and VCC– when VO is equal to or more positive than –9 V.
B. L is 40 turns of No. 20 enameled copper wire wound on Ferroxcube P36/22-3B7 potted core, or equivalent, with a 0.009-inch
air gap.
Regulated Output,
VO
R3 =
3 k
R4 =
3 k
Figure 10. Negative Switching Regulator
1000 pF
VI
2 k
Input From
Series 54/74 Logic
2 k
2N4422
R1
R2
REF
VCC+
VC
OUTPUT
VZ
CURR LIM
CURR SENS
IN+
VCC– FREQ COMP
IN–
RSC
μ
A723
NOTE A: A current-limiting transistor can be used for shutdown if current limiting is not required.
Regulated Output,
VO
Figure 11. Remote Shutdown Regulator With Current Limiting
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