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LP2950CDT-3.3 Datasheet

  • LP2950CDT-3.3

  • National Semiconductor [Series of Adjustable Micropower Vol...

  • NSC

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LP2950/LP2951 Series of Adjustable Micropower Voltage Regulators
May 2005
LP2950/LP2951
Series of Adjustable Micropower Voltage Regulators
General Description
The LP2950 and LP2951 are micropower voltage regulators
with very low quiescent current (75碌A(chǔ) 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 of the LP2950/
LP2951 increases only slightly in dropout, prolonging battery
life.
The LP2950-5.0 is available in the surface-mount D-Pak
package, and in the popular 3-pin TO-92 package for pin-
compatibility with older 5V regulators. The 8-lead LP2951 is
available in plastic, ceramic dual-in-line, LLP, 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/LP2951 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 coef-
ficient, making the part useful as a low-power voltage refer-
ence.
Features
n
n
n
n
n
n
n
n
n
n
n
5V, 3V, and 3.3V versions available
High accuracy output voltage
Guaranteed 100mA 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 (10m鈩?to 6鈩?
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
LP2951
00854625
00854601
漏 2005 National Semiconductor Corporation
DS008546
www.national.com

LP2950CDT-3.3 PDF文件相關(guān)型號

LP2951ACMMX,LP2951ACMMX-3.3,LP2951CMMX,LP2951CMMX-3.3,LP2951CSDX,LP2951J,LP2951J/883

LP2950CDT-3.3 產(chǎn)品屬性

  • 75

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - 線性

  • -

  • 正，固定式

  • 3.3V

  • 最高 30V

  • 0.35V @ 100mA

  • 1

  • 100mA

  • -40°C ~ 125°C

  • 表面貼裝

  • TO-252-3，DPak（2 引線+接片），SC-63

  • DPAK-3

  • 管件

  • LP2950CDT-3.3OS

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