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LP2951CM 参数 Datasheet PDF下载

LP2951CM图片预览
型号: LP2951CM
PDF下载: 下载PDF文件 查看货源
内容描述: LP2950 -N / LP2951 -N系列的可调微功耗电压调节器 [LP2950-N/LP2951-N Series of Adjustable Micropower Voltage Regulators]
分类和应用: 线性稳压器IC调节器电源电路光电二极管输出元件PC
文件页数/大小: 43 页 / 1949 K
品牌: TI [ TEXAS INSTRUMENTS ]
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SNVS764N – JANUARY 2000 – REVISED MAY 2013
LP2950-N/LP2951-N Series of Adjustable Micropower Voltage Regulators
Check for Samples:
1
FEATURES
5V, 3V, and 3.3V Versions Available
High Accuracy Output Voltage
Ensured 100 mA Output Current
Extremely Low Quiescent Current
Low Dropout Voltage
Extremely Tight Load and Line Regulation
Very Low Temperature Coefficient
Use as Regulator or Reference
Needs Minimum Capacitance for Stability
Current and Thermal Limiting
Stable With Low-ESR Output Capacitors (10
mΩ to 6Ω)
DESCRIPTION
The LP2950-N and LP2951-N 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-
N/LP2951-N increases only slightly in dropout,
prolonging battery life.
The LP2950-N-5.0 is available in the surface-mount
PFM package, and in the popular 3-pin TO-92
package for pin-compatibility with older 5V regulators.
The 8-lead LP2951-N is available in plastic, ceramic
dual-in-line, WSON, 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 resistors.
Careful design of the LP2950-N/LP2951-N has
minimized all contributions to the error budget. This
includes a tight initial tolerance (.5% typ.), extremely
good load and line regulation (.05% typ.) and a very
low output voltage temperature coefficient, making
the part useful as a low-power voltage reference.
2
LP2951-N VERSIONS ONLY
Error Flag Warns of Output Dropout
Logic-Controlled Electronic Shutdown
Output Programmable From 1.24 to 29V
Block Diagram and Typical Applications
Figure 1. LP2950-N
1
2
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
Copyright © 2000–2013, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.