SPX3819
500mA, Low-Noise LDO Voltage Regulator
FEATURES
ADJ/BYP
GND
EN
NC
1
2
8
7
6
■ Low Noise: 40µV Possible
SPX3819
■ High Accuracy: 1%
8 Pin DFN
V
3
4
NC
IN
■ Reverse Battery Protection
■ Low Dropout: 340mV at Full Load
■ Low Quiescent Current: 90µA
■ Zero Off-Mode Current
5
NC
V
OUT
Now Available in Lead Free Packaging
■ Fixed Output: 1.2V, 1.5V, 1.8V, 2.5V, 3.0V,
3.1V, 3.3V, 5.0V. Adj. Output also available.
APPLICATIONS
■ 5 Pin SOT-23, 8 Pin Narrow SOIC and 8 pin
■ Battery Powered Systems
■ Cordless Phones
2X3 DFN Packages
■ Radio Control Systems
■ Portable/Palm Top/Notebook Computers
■ Portable Consumer Equipment
■ Portable Instrumentation
■ Bar Code Scanners
■ SMPS Post Regulators
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 drops 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
VIN
1
VOUT
5
4
+
2
SPX3819
GND
EN
+
3
BYP
(Opt.)
ENABLE may be tied directly to V
IN
TOP View
Date: Oct18-06 Rev B
SPX3819 500mA, Low Noise LDO Voltage Regulator
© Copyright 2006 Sipex Corporation
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