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參數(shù)資料
| 型號(hào)： | LP2950 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Series of Adjustable Micropower Voltage Regulators |
| 中文描述： | 系列可調(diào)微功耗電壓調(diào)節(jié)器 |
| 文件頁(yè)數(shù)： | 12/14頁(yè) |
| 文件大?。?/td> | 142K |
| 代理商： | LP2950 |
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Advanced Monolithic Systems, Inc.
6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
LP2950/LP2951
TYPICAL APPLICATIONS
(Continued)
2 Ampere Low Dropout Regulator
Regulator with Early Warning and Auxiliary Output
ERROR
ERROR
FLAG
CURRENT
LIMIT SECTION
GND
FB
V
OUT
SD
1
4
3
8
5
7
+V
IN
+V
IN
= V
OUT
+.5V
LP2951
+V
OUT
@ 2A
R
1
R
2
10k
100
μ
F
4.7
TANT.
+
+
1%
220
.033
20k
4.7M
2N3906
0.05
680
470
MJE2955
ERROR
GND
FB
V
OUT
5
4
8
1
6
+V
IN
LP2951
#1
V
TAP
7
ERROR
GND
FB
V
OUT
4
8
6
+V
IN
V
TAP
LP2951
#2
3
SD
7
SENSE
2
5
RESET
1
μ
F
20
+V
IN
D
1
D
2
3.6V
NICAD
27 k
2.7M
330 k
MAIN 5V OUTPUT
1
μ
F
D
4
Q
1
μ
P
V
DD
2
D
3
5V MEMORY
SUPPLY
EARLY WARNING
SENSE
+
+
VOUT = 1.23V(1+R1/R2)
For 5V V
OUT
, use internal resistors. Wire pin 6 to 7 and pin 2 to +V
OUT
Buss.
Operation: Reg.#1’s V
OUT
is programmed one diode drop above 5V. It’s error flag
becomes active when V
IN
≤
5.7V. When V
IN
drops below 5.3V, the error flag of
Reg.#2 becomes active and via Q1 latches the main output off. When V
IN
again
exceeds 5.7V Reg.#1 is back in regulation and the early warning signal rises,
unlatching Reg.#2 via D3.
Early warning flag on low input voltage
Main output latches off at lower input voltages
Battery backup on auxiliary output
1A Regulator with 1.2V Dropout
Latch Off When Error Flag Occurs
OUTPUT
5V ± 1% @
0 TO 1A
GND
FB
OUT
IN
4
7
6
1
2
8
V
TAP
LP2951
SUPERTEX
VP12C
SENSE
0.002μ
F
2
k
10
k
1Μ
0.01μ
F
220μ
F
1μ
F
+
I
Q
400
μ
A
UNREGULATED
INPUT
R
1
ERROR
GND
FB
V
OUT
R
2
SD
7
4
3
8
1
5
+V
IN
+V
IN
V
OUT
1
μ
F
+
470k
LP2951
470k
RESET
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LP2950_05 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:100 mA LOW-DROPOUT VOLTAGE REGULATOR |
| LP2950_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:100 mA, Low Power Low Dropout Voltage Regulator |
| LP2950_07 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:100mA Low Dropout Voltage Regulators |
| LP2950_08 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:100mA Low-Dropout Voltage Regulator |
| LP2950_09 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:100 mA LOW-DROPOUT VOLTAGE REGULATOR |
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