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參數(shù)資料
| 型號： | LP2950CDT-3.0 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Series of Adjustable Micropower Voltage Regulators |
| 中文描述： | 3 V FIXED POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PSSO2 |
| 封裝： | TO-252, DPAK-3/2 |
| 文件頁數(shù)： | 12/14頁 |
| 文件大?。?/td> | 142K |
| 代理商： | LP2950CDT-3.0 |
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LP2950CDT-3.3 | Series of Adjustable Micropower Voltage Regulators |
| LP2950CDTX-3.0 | Series of Adjustable Micropower Voltage Regulators |
| LP2950CDTX-3.3 | Series of Adjustable Micropower Voltage Regulators |
| LP2950CZ-3.0 | 128 x 128 pixel format, LED or EL Backlight available |
| LP2950CZ-3.3 | 128 x 128 pixel format, LED or EL Backlight available |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP2950CDT5.0 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Positive Fixed Voltage Regulator |
| LP2950CDT-5.0 | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP2950CDT-5.0/NOPB | 功能描述:低壓差穩(wěn)壓器 - LDO 100MA LDO DPAK RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP2950CDT-5.0/NOPB | 制造商:Texas Instruments 功能描述:Linear Voltage Regulator IC |
| LP2950CDT-5.0G | 功能描述:低壓差穩(wěn)壓器 - LDO 5V 100mA Low Power RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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