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參數資料
| 型號： | LP2950-SP6645 |
| 英文描述： | Power Management 1 | Short Form Catalog |
| 中文描述： | 電源管理1 |簡表目錄 |
| 文件頁數： | 1/21頁 |
| 文件大小： | 640K |
| 代理商： | LP2950-SP6645 |
LP2950/LP2951
Series of Adjustable Micropower Voltage Regulators
General Description
The LP2950 and LP2951 are micropower voltage regulators
with very low quiescent current (75 μA typ.) and very low
dropout voltage (typ. 40 mV at light loads and 380 mV at
100 mA). They are ideally suited for use in battery-powered
systems. Furthermore, the quiescent current of the LP2950/
LP2951 increases only slightly in dropout, prolonging battery
life.
The LP2950-5.0 in the popular 3-pin TO-92 package is
pin-compatible with older 5V regulators. The 8-lead LP2951
is available in plastic, ceramic dual-in-line, or metal can
packages 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, 3V, or 3.3V output (depending on the version), or
programmed from 1.24V to 29V with an external pair of re-
sistors.
Careful design of the LP2950/LP2951 has minimized all con-
tributions to the error budget. This includes a tight initial tol-
erance (.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
5V, 3V, and 3.3V versions available
n
High accuracy output voltage
n
Guaranteed 100 mA output current
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 minimum capacitance for stability
n
Current and Thermal Limiting
n
Stable with low-ESR output capacitors
LP2951 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
LP2950
DS008546-25
LP2951
DS008546-1
May 1999
L
1999 National Semiconductor Corporation
DS008546
www.national.com
相關PDF資料 |
PDF描述 |
|---|---|
| LP2951-01AJ | Fixed & Adjustable Voltage Regulator |
| LP2951-02BJ | Fixed & Adjustable Voltage Regulator |
| LP2951-03BJ | Fixed & Adjustable Voltage Regulator |
| LP2951ACD-3.0R2 | Fixed & Adjustable Voltage Regulator |
| LP2951ACD-3.3R2 | Fixed & Adjustable Voltage Regulator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LP2950-XX-D08-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:100 mA LOW-DROPOUT VOLTAGE REGULATOR |
| LP2950-XX-S08-R | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:100 mA LOW-DROPOUT VOLTAGE REGULATOR |
| LP2950-XX-S08-T | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:100 mA LOW-DROPOUT VOLTAGE REGULATOR |
| LP2950-XX-T92-B | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:100 mA LOW-DROPOUT VOLTAGE REGULATOR |
| LP2950-XX-T92-K | 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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