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SPX2950CN-5.0 Datasheet(PDF) 1 Page - Sipex Corporation

Part # SPX2950CN-5.0
Description  150mA Low Dropout Voltage Regulator
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Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SPX2950CN-5.0 Datasheet(HTML) 1 Page - Sipex Corporation

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1
Rev. 3/6/03
SPX2950/SPX2951 150mA Low Dropout Voltage Regulator
©Copyright 2003 Sipex Corporation
SPX2950/SPX2951
DESCRIPTION
FEATURES
■ 5.0V and 3.3V at 150mA Output
■ Accurate: 0.5% for SPX2950A/SPX2951A
■ Very Low Quiescent Current
■ Low Dropout Voltage: 300mV at 150mA
■ Extremely Tight Load and Line Regulation
■ Very Low Temperature Coefficient
■ Current & Thermal Limiting
■ Need Only 1µF for Stability
■ Offered in TO-92 (SPX2950) and SOIC
(SPX2951)
■ Direct Replacement for LP2950/LP2951
SPX2951 versions only
■ Error Flag Warns of Output Dropout
■ Logic-Controlled Electronic Shutdown
■ Output Programmable From 1.24 to 30V
®
The SPX2950 and SPX2951 are low power voltage regulators. These devices are an excellent choice for
use in battery-powered applications such as cordless telephones, radio control systems, and portable
computers. The SPX2950 and SPX2951 feature low quiescent current and low dropout voltage (typ. 20mV
at 100µA and 300mV at 150mA). This includes a tight initial tolerance of (0.5% for SPX2950A/SPX2951A),
extremely good load and line regulation (0.05% typ.), and very low output temperature coefficient (20ppm/
°C typ.), making the SPX2950/SPX2951 useful as a low-power voltage reference.
The error flag output feature is used as a power-on reset for warning of a low output voltage, due to a falling
voltage. The logic compatible shutdown feature enables the regulator to be switched ON and OFF. The
SPX2950 is offered in a 3-pin TO-92 package compatible with other 5.0V, 3.3V regulators. The SPX2951
is availiable in an 8-lead SOIC package.
150mA Low Dropout Voltage Regulator
Block Diagram of SPX2951, 8 Lead 5V Version
INPUT
OUTPUT
UNREGULATED DC
SHUTDOWN
GROUND
ERROR
______
SENSE
TO CMOS OR
TTL
REFERENCE
ERROR DETECTION
COMPARATOR
ERROR
AMPLIFIER
1.23V
FROM
CMOS OR
TTL
+
+
+
+
+
+
60 mV
3
7
8
1
2
6
5
4
60kΩ
330kΩ
180kΩ
.
.
1µF
_
_
FEEDBACK
5V TAP
5V
APPLICATIONS
■ Battery Powered Systems
■ Cordless Telephones
■ Radio Control Systems
■ Portable/Palm Top/Notebook Computers
■ Portable Consumer Equipment
■ Portable Instrumentation
■ Avionics
■ SMPS Post-Regulator
■ Voltage Reference
■ Automotive Electronics


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