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參數(shù)資料
| 型號： | 01F2160 |
| 英文描述： | IC-VOLTAGE REG +3V |
| 中文描述： | 集成電路3V的電壓退訂 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 342K |
| 代理商： | 01F2160 |
LP2950
http://onsemi.com
11
330 k
Figure 22. Regulator with Early Warning and Auxiliary Output
+Vin
Memory
V+
1.0
F
20
5
3
Error
SD
Gnd
FB
47
6
VO T
SNS
2
Vout
Vin
8
1
LP2951CN
#1
1.0
F
5
3
Error
SD
Gnd
FB
47
6
VO T
SNS
2
Vout
Vin
8
1
LP2951CN
#2
NC
Reset
VDD
P
Early Warning
All diodes are 1N4148.
Early Warning flag on low input voltage.
Main output latches off at lower input
voltages.
Battery backup on auxiliary output.
Operation: Regulator #1’s Vout is
programmed one diode drop above 5.0 V.
Its error flag becomes active when Vin < 5.7
V. When Vin drops below 5.3 V, the error
flag of regulator #2 becomes active and via
Q1 latches the main output “off”. When Vin
again exceeds 5.7 V, regulator #1 is back in
regulation and the early warning signal
rises, unlatching regulator #2 via D3.
D4
2.7 M
Q1
2N3906
D2
D1
D3
27 k
3.6 V
NiCad
Main
Output
Figure 23. 2.0 A Low Dropout Regulator
+Vin
Vout @ 2.0 A
100
F
NC
R2
R1
470
5
3
Error
SD
Gnd
FB
47
6
VO T
SNS
2
Vout
Vin
8
1
LP2951CN
MJE2955
4.7 M
Error
Flag
Vout = 1.25V (1.0 + R1/R2)
For 5.0 V output, use internal resistors. Wire Pin 6 to 7,
and wire Pin 2 to +Vout Bus.
20 k
47
4.7
F
Tant
0.05
680
0.033
F
2N3906
10 k
Current Limit
Section
220
1000
F
.33
F
.01
F
2N3906
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| 0504477025 | 242.27 mm2, RING TERMINAL |
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| 0504527125 | 96.3 mm2, RING TERMINAL |
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