AS3815
150 mA, Low-Noise LDO Voltage Regulator
(Preliminary Information)
FEATURES
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Low Noise Output LDO
1% Initial Accuracy At 150mA
Very Low Quiescent Current
Low Dropout Voltage (210mV At 150mA)
Current & Thermal Limiting
Reverse-Battery Protection
Wide Range of Fix Output Voltages
1.8V, 2.5V, 2.8V, 3.0V, 3.3V, 4.0V, 4.5V, & 5.0V
Zero Off-Mode Current
Small 5-Pin SOT-23
Pin Compatible to MIC5205/MAX8877 (Fixed Option Only)
APPLICATIONS
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PDA
Battery Powered Systems
Cellular Phone
Cordless Telephones
Radio Control Systems
Portable/Palm Top/Notebook Computers
Portable Consumer Equipment
Portable Instrumentation
Bar Code Scanners
SMPS Post-Regulator
PRODUCT DESCRIPTION
The AS3815 is an excellent choice for use in battery-powered applications, and where power conservation is desired. Such as:
cellular/ cordless telephones, radio control systems, and portable computers.
This device is a positive voltage regulator with very low dropout voltage and low output noise. It uses very little quiescent current of
750
µA
at 100 mA output load. V
OUT
tolerance is less than 1% with a compensated temperature coefficient. Many fixed output
voltages, as listed below, or an adjustable version are available in a small 5-pin SOT-23 package.
Other key features include: Zero off-mode current, protection against reversed battery, thermal and current limiting.
ORDERING INFORMATION
Part Number
AS3815M5-X
Operating Junction
Temperature Range
-40°C to +125°C
Accuracy
1%
Package Type
SOT-23-5
X = Output Voltage, X = 1.8 for 1.8V, 3.3 for 3.3V etc.
Blank for Adjustable
For other fixed voltages consult factory.
PIN CONNECTIONS
Top View
V
OUT
BYP
4
2
3
MARKING INFORMATION
Voltage
1.8
2.5
2.8
2.85
3.0
3.3
Marking
R1XX
R2XX
R3XX
R4XX
R5XX
R6XX
Voltage
3.6
4.5
4.70
4.75
5.0
ADJ
Marking
R7XX
R8XX
R9XX
RAXX
RBXX
RCXX
Top View
V
OUT
5
ADJ/BYP
4
2
3
5
AS3815
1
AS3815
1
V
IN
GND EN
V
IN
GND EN
AS3815M5-X
Fixed Output Voltage
AS3815M5-ADJ
Adjustable Output Voltage
Rev. 10/6/00
SIPEX [ SIPEX CORPORATION ]
