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參數(shù)資料
| 型號： | LP2950 |
| 廠商： | Micrel Semiconductor,Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 100mA Low-Dropout Voltage Regulator(輸出電流100mA 低壓差電壓穩(wěn)壓器) |
| 中文描述： | 100mA的低壓差穩(wěn)壓器（輸出電流100mA的低壓差電壓穩(wěn)壓器） |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 135K |
| 代理商： | LP2950 |
LP2950/2951
Micrel
3
February 1999
3-35
LP2950/2951
100mA Low-Dropout Voltage Regulator
General Description
The LP2950 and LP2951 are micropower voltage regulators
with very low dropout voltage (typically 40mV at light loads
and 380mV at 100mA), and very low quiescent current (75
μ
A
typical). The quiescent current of the LP2950/LP2951
increases only slightly in dropout, thus prolonging battery life.
This feature, among others, makes the LP2950 and LP2951
ideally suited for use in battery-powered systems.
Available in a 3-Pin TO-92 package, the LP2950 is pin-
compatible with the older 5V regulators. Additional system
functions, such as programmable output voltage and logic-
controlled shutdown, are available in the 8-pin DIP and 8-pin
SOIC versions of the LP2951.
Applications
Automotive Electronics
Voltage Reference
Avionics
Features
High accuracy 5V, guaranteed 100 mA output
Extremely low quiescent current
Low-dropout voltage
Extremely tight load and line regulation
Very low temperature coefficient
Use as regulator or reference
Needs only 1
μ
F for stability
Current and thermal limiting
LP2951 Versions Only
Error flag warns of output dropout
Logic-controlled electronic shutdown
Output programmable from 1.24 to 29V
Block Diagram and Pin Configurations
LP2950 and LP2951 Block Diagram
(Pin Numbers Refer to LP2951)
1
2
3
4
8
7
6
5
OUTPUT
SENSE
SHUTDOWN
GROUND
ERROR
5V TAP
FEEDBACK
INPUT
GROUND
OUTPUT
INPUT
TO-92 Plastic Package Bottom View
(BZ)
DIP and SO Packages
(BN and BM)
3
2
1
See MIC2950 for a part with 1) higher output (150 mA), 2) transient protection (60V), and 3) reverse input protection to –20V)
5V TAP
6
SENSE
2
GROUND
4
ERROR
5
TO CMOS
OR TTL
330
k
+
1.5 μF
60
k
182
k
OUTPUT
INPUT
FEEDBACK
1
8
7
5V
150 mA
MAX.
+
–
+
–
ERROR
AMPLIFIER
ERROR
DETECTION
COMPARATOR
+
1.23 V
REF.
+
60 mV
SHUT-
DOWN
3
FROM
CMOS
OR TTL
+
UNREGULATED DC
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相關代理商/技術參數(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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