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參數(shù)資料
| 型號(hào)： | LP4951CM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Adjustable Micropower Voltage Regulators |
| 中文描述： | FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PDSO8 |
| 文件頁(yè)數(shù)： | 1/14頁(yè) |
| 文件大小： | 436K |
| 代理商： | LP4951CM |
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LP4950C-5V and LP4951C
Adjustable Micropower Voltage Regulators
General Description
The LP4950C and LP4951C are micropower voltage regu-
lators with very low quiescent current (75μA typ.) and very
low dropout voltage (typ. 40mV at light loads and 380mV at
100mA). They are ideally suited for use in battery-powered
systems.
Furthermore,
the
quiescent
current
LP4950C/LP4951C increases only slightly in dropout, pro-
longing battery life.
The LP4950C in the popular 3-pin TO-92 package is pin
compatible with older 5V regulators. The 8-lead LP4951C is
available in a plastic surface mount package and offers
additional system functions.
One such feature is an error flag output which warns of a low
output voltage, often due to falling batteries on the input. It
may be used for a power-on reset. A second feature is the
logic-compatible shutdown input which enables the regulator
to be switched on and off.Also, the part may be pin-strapped
for a 5V output or programmed from 1.24V to 29V with an
external pair of resistors.
Careful design of the LP4950C/LP4951C has minimized all
contributions to the error budget. This includes a tight initial
of
the
tolerance (.5% typ.), extremely good load and line regulation
(.05% typ.) and a very low output voltage temperature coef-
ficient, making the part useful as a low-power voltage refer-
ence.
Features
n
High accuracy 5V guaranteed 100mA output
n
Extremely low quiescent current
n
Low dropout voltage
n
Extremely tight load and line regulation
n
Very low temperature coefficient
n
Use as Regulator or Reference
n
Needs only 1μF for stability
n
Current and Thermal Limiting
LP4951C versions only
n
Error flag warns of output dropout
n
Logic-controlled electronic shutdown
n
Output programmable from 1.24 to 29V
Block Diagram and Typical
Applications
LP4950C
LP4951C
20052825
20052801
September 2002
L
2002 National Semiconductor Corporation
DS200528
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP4951CM/NOPB | 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(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 |
| LP4951CMX | 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(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 |
| LP4951CMX/HAPB | 制造商:Texas Instruments 功能描述: |
| LP4951CMX/NAK2 | 制造商:Texas Instruments 功能描述: |
| LP4951CMX/NOPB | 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(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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