AS3819
500 mA, Low-Noise LDO Voltage Regulator
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ADVANCED INFORMATION
FEATURES
APPLICATIONS
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Ultra-Low Noise Output LDO
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Battery Powered Systems
Cordless Telephones
1% Initial Accuracy At 500mA
Very Low Quiescent Current
Radio Control Systems
Low Dropout Voltage (300mV At 500mA)
Current & Thermal Limiting
Portable/Palm Top/Notebook Computers
Portable Consumer Equipment
Portable Instrumentation
Bar Code Scanners
Reverse-Battery Protection
Several Fix Output Voltages, 2.5, 3.3, 5.0V & Adjustable
Zero Off-Mode Current
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SMPS Post-Regulator
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Packages offered SO-8, TO-263, SOT-223, SOT-23 & TO-220
Pin Compatible to MIC5209 (Fixed Option Only)
PRODUCT DESCRIPTION
The AS3819 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 AS3819 initial tolerance is less than 1% max
with logic compatible ON/OFF switching input. The unique feature of AS3819 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 AS3819 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.
ORDERING INFORMATION
SO-8 (S1)
TO-263 (T)
3-PIN
TO-263 (T5)
5-PIN
SOT-223 (M3)
SOT-23-5(M5)
TO-220 (U)
OPER JUNCTION RANGE
AS3819S1-X
AS3819T-X
AS3819T5-X
AS3819M3-X
AS3819M5-X
AS3819U-X
-40°C to +125°C
Package Marking Information for SOT-23.
X = Output Voltage 2.5 for 2.5V, 3.3V ect; Blank is Adj.
For other output voltages consult factory.
TO-263-5 Package
TO-263-3 Package
8-Pin Surface Mount (S1)
EN
1
2
3
4
8
7
6
5
GND
GND
GND
GND
V
IN
VOUT
NC
AS3819
2
AS3819
AS3819
1
3
1
2
3 4 5
1) EN
VIN
MARKING INFORMATION
2)
3) GND
(SOT-23 Only)
VOUT
4)
5) ADJ/BYP
Top View
V
VOUT
GND
IN
Top View
Front View
TO-220
Voltage
ADJ
Marking
A0XX
A8XX
A1XX
A9XX
SOT-23-5
EN
SOT-223
GND
VIN
2.5V
VOUT
GND
VIN
1
3
4
2
3.3V
5.0V
AS3819
AS3819
1
2
3
5
Front View
XX Production Reference Code.
GND
V
OUT
V
ADJ/BYP
VOUT
IN
Front View
Top View
Rev. 10/2/00
SIPEX [ SIPEX CORPORATION ]
