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參數(shù)資料
| 型號(hào)： | MC78LC00 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | MICROPOWER ULTRA-LOW QUIESCENT CURRENT VOLTAGE REGULATORS |
| 中文描述： | 微功耗超低靜態(tài)電流電壓調(diào)節(jié)器 |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大小： | 112K |
| 代理商： | MC78LC00 |
MC78LC00 Series
APPLICATIONS INFORMATION
5
MOTOROLA ANALOG IC DEVICE DATA
Introduction
The MC78LC00 micropower voltage regulators are
specifically designed with high accuracy output voltage and
ultra low quiescent current by CMOS process making them
ideal for battery powered applications and hand–held
communication equipment. An input bypass capacitor is
recommended if the regulator is located an appreciable
distance (
≥
4 inches) from the input voltage source. These
regulators require
≥
0.1
μ
F capacitance between the output
terminal and ground for stability. Most types of aluminum,
tantalum or multilayer ceramic will perform adequately. Solid
tantalums or other appropriate capacitors are recommended
for operation below 25
°
C. The bypass capacitors should be
mounted with the shortest possible leads or track lengths
directly across the regulator input and output terminals.
With economical electrolytic capacitors, cold temperature
operation can pose a serious stability problem. As the
electrolyte freezes, around –30
°
C, the capacitance will
decrease and the equivalent series resistance (ESR) will
increase drastically, causing the circuit to oscillate. Quality
electrolytic capacitors with extended temperature ranges of
–40
°
to +85
°
C are readily available. Solid tantalum
capacitors may be the better choice if small size is a
requirement. However, a maximum ESR limit of 3.0
must
be observed over temperature to maintain stability.
In the Current Boost Circuit, shown in Figures 10 and 12,
an output current of up to 600 mA can be delivered by the
circuit. The circuit of Figure 10 has no current limit. In each
case, the external transistor must be rated for the expected
power dissipation. Figure 11 shows how a fixed output may
be programmed, using R1 and R2, to provide a higher
output voltage.
Figure 9. Typical Application
2
3
VO
Gnd
Vin
Gnd
1
0.1
μ
F
0.1
μ
F
MC78LC00
Figure 10. Current Boost Circuit
2
3
VO
Gnd
Vin
Gnd
1
0.1
μ
F
0.1
μ
F
MC78LC00
MJD32C
100
.033
μ
F
Figure 11. Adjustable VO
VO
Vin
ICC
C2
C1
MC78LC00
R1
Gnd
R2
2
3
1
Figure 12. Current Boost Circuit with
Overcurrent Limit Circuit
VO
Gnd
Vin
Gnd
0.1
μ
F
0.1
μ
F
MC78LC00
MJD32C
Q1
R1
R2
Q2
MMBT2907
ALT1
.033
μ
F
2
3
1
IO(short circuit)
VBE2
R2
VBE1
VBE2
R1
VO
VO(Reg)
1
R2
R1
ICCR2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC78LC00_06 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Micropower Voltage Regulator |
| MC78LC15NTR | 功能描述:低壓差穩(wěn)壓器 - LDO 1.5V 80mA CMOS 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(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 |
| MC78LC15NTRG | 功能描述:低壓差穩(wěn)壓器 - LDO 1.5V 80mA CMOS 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(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 |
| MC78LC18NTR | 功能描述:低壓差穩(wěn)壓器 - LDO 1.8V 80mA CMOS 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(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 |
| MC78LC18NTRG | 功能描述:低壓差穩(wěn)壓器 - LDO 1.8V 80mA CMOS 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(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 |
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