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ADP122AUJZ-3.3-R7 View Datasheet(PDF) - Analog Devices

Part NameADP122AUJZ-3.3-R7 ADI
Analog Devices ADI
Description5.5 V Input, 300 mA, Low Quiescent Current, CMOS Linear Regulator
ADP122AUJZ-3.3-R7 Datasheet PDF : 20 Pages
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ADP122/ADP123
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Typical Application Circuit ............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Recommended Specifications..................................................... 4
Absolute Maximum Ratings............................................................ 5
Thermal Data ................................................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution.................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
REVISION HISTORY
10/09—Revision 0: Initial Version
Typical Performance Characteristics ..............................................7
Theory of Operation ...................................................................... 11
Applications Information .............................................................. 12
Capacitor Selection .................................................................... 12
Undervoltage Lockout ............................................................... 13
Enable Feature ............................................................................ 13
Current Limit and Thermal Overload Protection ................. 14
Thermal Considerations............................................................ 14
Junction Temperature Calculations ......................................... 15
Printed Circuit Board Layout Considerations ....................... 16
Outline Dimensions ....................................................................... 18
Ordering Guide .......................................................................... 18
Rev. 0 | Page 2 of 20
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GENERAL DESCRIPTION
The ADP122/ADP123 are low quiescent current, low dropout linear regulators. They are designed to operate from an input voltage between 2.3 V and 5.5 V and to provide up to 300 mA of output current. The low 85 mV dropout voltage at a 300 mA load improves efficiency and allows operation over a wide input voltage range.
The low 170 μA of quiescent current at full load makes the ADP122 ideal for battery-operated portable equipment.

FEATURES
Input voltage supply range: 2.3 V to 5.5 V
300 mA maximum output current
Fixed and adjustable output voltage versions
Very low dropout voltage: 85 mV at 300 mA load
Low quiescent current: 45 μA at no load
Low shutdown current: <1 μA
Initial accuracy: ±1% accuracy
Up to 31 fixed-output voltage options available from 1.75 V to 3.3 V
Adjustable-output voltage range 0.8 V to 5.0 V (ADP123)
Excellent PSRR performance: 60 dB at 100 kHz
Excellent load/line transient response
Optimized for small 1.0 μF ceramic capacitors
Current limit and thermal overload protection
Logic controlled enable
Compact, 5-lead TSOT package

APPLICATIONS
Digital camera and audio devices
Portable and battery-powered equipment
Automatic meter reading (AMR) meters
GPS and location management units
Medical instrumentation
Point-of-sale equipment

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