參數(shù)資料
型號(hào): LP2951ACDM
廠商: ON SEMICONDUCTOR
元件分類: 固定/可調(diào)正電壓?jiǎn)温份敵鯨DO穩(wěn)壓器
英文描述: Micropower Voltage Regulators
中文描述: FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.45 V DROPOUT, PDSO8
封裝: PLASTIC, MICROPAK-8
文件頁(yè)數(shù): 3/18頁(yè)
文件大?。?/td> 164K
代理商: LP2951ACDM
LP2950, LP2951, NCV2951
http://onsemi.com
11
330 k
Figure 23. Regulator with Early Warning and Auxiliary Output
+Vin
Memory
V+
1.0
mF
20
5
3
Error
SD
GND
FB
47
6
VO T
SNS
2
Vout
Vin
8
1
LP2951CN
#1
1.0
mF
5
3
Error
SD
GND
FB
47
6
VO T
SNS
2
Vout
Vin
8
1
LP2951CN
#2
NC
Reset
VDD
mP
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 24. 2.0 A Low Dropout Regulator
+Vin
Vout @ 2.0 A
100
mF
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
mF
Tant
0.05
680
0.033
mF
2N3906
10 k
Current Limit
Section
220
1000
mF
.33
mF
.01
mF
2N3906
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相關(guān)代理商/技術(shù)參數(shù)
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LP2951ACDM3.0 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:100 mA, Low Power Low Dropout Voltage Regulator
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LP2951ACDM-3.0RG 功能描述:低壓差穩(wěn)壓器 - LDO ANA 100MA 3V LDO VREG 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(dòng)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
LP2951ACDM3.3 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:100 mA, Low Power Low Dropout Voltage Regulator