®
SPX3819
500mA, Low-Noise LDO Voltage Regulator
FEATURES
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Low Noise: 40µV Possible
High Accuracy: 1%
Reverse Battery Protection
Low Dropout: 340mV at Full Load
Low Quiescent Current: 90µA
Zero Off-Mode Current
Fixed Output: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V,
3.1V, 3.3V, 5.0V
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5 Pin SOT-23, 8 Pin nSOIC and 8 pin 2X3 DFN
Packages.
Battery Powered Systems
Cordless Phones
Radio Control Systems
Portable/Palm Top/Notebook Computers
Portable Consumer Equipment
Portable Instrumentation
Bar Code Scanners
SMPS Post Regulators
EN
NC
V
IN
1
2
3
4
8
ADJ/BYP
GND
NC
V
OUT
SPX3819
7
8 Pin DFN
6
5
NC
APPLICATIONS
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Now Available in Lead Free Packaging
DESCRIPTION
The SPX3819 is a positive voltage regulator with a low dropout voltage and low noise output. In addition,
this device offers a very low ground current of 800µA at 100mA output. The SPX3819 has an initial tolerance
of less than 1% max and a logic compatible ON/OFF switched input. When disabled power consumption
drop to nearly zero. Other key features include reverse battery protection, current limit, and thermal
shutdown. The SPX3819 includes a reference bypass pin for optimal low noise output performance. With
its very low output temperature coefficient, this device also makes a superior low power voltage reference.
The SPX3819 is an excellent choice for use in battery-powered applications such as cordless telephones,
radio control systems, and portable computers. It is available in several fixed voltages 1.2V, 1.5V, 1.8V,
2.5V, 3.0V, 3.1V, 3.3V, 5.0V or with an adjustable output. This device is offered in 8 pin nSOIC, 8 pin DFN
and 5-pin SOT-23 packages.
TYPICAL APPLICATION CIRCUIT
V
IN
1
5
V
OUT
+
2
+
GND
3
EN
ENABLE may be tied directly to V
IN
SPX3819
4
BYP
(Opt.)
TOP View
Date:6/8/2004
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2004 Sipex Corporation
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SIPEX [ SIPEX CORPORATION ]
