SPX3819
500 mA, Low-Noise LDO Voltage Regulator
(ADVANCED INFORMATION)
FEATURES
APPLICATIONS
• Ultra-Low Noise Output LDO
• Battery Powered Systems
ADVANCED • 1% Initial AccuracyAt 500mA
• Very Low Quiescent Current
• Low Dropout Voltage (300mV At 500mA)
• Current & Thermal Limiting
• Reverse-Battery Protection
• Several Fix Output Voltages, 2.5, 3.3, 5.0V & Adjustable
• Zero Off-Mode Current
• Packages offered SO-8, TO-263, SOT-223, SOT-23 & TO-220
• Pin Compatible to MIC5209 (Fixed Option Only)
• Cordless Telephones
• Radio Control Systems
• Portable/Palm Top/Notebook Computers
• Portable Consumer Equipment
• Portable Instrumentation
• Bar Code Scanners
• SMPS Post-Regulator
PRODUCT DESCRIPTION
The SPX3819 is a low powered positive voltage regulator with ultra low noise output and very low voltage dropout. In addition, this
device offers very low quiescent current of approximately 800uA at 100mA output. The SPX3819 initial tolerance is less than 1%
max with logic compatible ON/OFF switching input. The unique feature of SPX3819 includes a reference bypass pin for the best
results of low noise.
This device is an excellent choice for the use in battery-powered applications such as cordless telephones, radio control systems, and
portable computers. When disable power consumption drop to nearly zero. This device has a very low output temperature coefficient,
making it a low power voltage reference. The key features include protection against reversed battery, fold-back current limiting, and
automotive load dump protection.
The SPX3819 is available in several fixed voltages 2.5V, 3.3V, 5.0V or adjustable output. This device is offered in SO-8, 3 and 5 pin
TO-263, SOT-223, 5-pin SOT-23 & 3-pin TO-220. These packages offer all the features and adjustable output.
MARKING INFORMATION
(SOT-23 Only)
PIN CONNECTIONS
Voltage
ADJ
2.5V
Marking
A0XX
A8XX
TO-263-5 Package
TO-263-3 Package
SOT-223
SOT-23-5
EN GND V IN
TO-220
VOUT
3.3V
5.0V
A1XX
A9XX
SPX3819
SPX3819
SPX3819
321
SPX3819
GND
VIN
XX Production Reference Code.
1 2 3 4 5 1) EN
123
1
2
3
4
5
Front View
Top View
2) VIN
3) GND
4) VOUT
5) ADJ/BYP
V
IN
GND
V
OUT
Front View
V GND V
IN
OUT
Front View
ADJ/BYP
VOUT
Top View
Rev. 10/30/00