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ADP121CB-2.5-EVALZ View Datasheet(PDF) - Analog Devices

Part NameADP121CB-2.5-EVALZ ADI
Analog Devices ADI
Description150 mA, Low Quiescent Current, CMOS Linear Regulator


ADP121CB-2.5-EVALZ Datasheet PDF : 20 Pages
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ADP121
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Typical Application Circuits............................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Recommended Specifications: Input and Output Capacitors 4
Absolute Maximum Ratings............................................................ 5
Thermal Data ................................................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution.................................................................................. 5
Pin Configurations and Function Descriptions ........................... 6
REVISION HISTORY
8/12—Rev. F to Rev. G
Change to Ordering Guide.............................................................19
7/12—Rev. E to Rev. F
Updated Outline Dimensions ........................................................18
Change to Ordering Guide.............................................................19
8/11—Rev. D to Rev. E
Changes to Figure 22........................................................................ 9
Changes to Ordering Guide .......................................................... 19
1/10—Rev. C to Rev. D
Changes to Ordering Guide .......................................................... 19
11/09—Rev. B to Rev. C
Changes to Figure 1, Figure 2, and General Description
Section................................................................................................ 1
Data Sheet
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
PCB Layout Considerations...................................................... 17
Outline Dimensions ....................................................................... 18
Ordering Guide .......................................................................... 19
Changes to Table 3.............................................................................5
Changes to Figure 46 Caption and Figure 47 Caption .............. 17
Changes to Ordering Guide .......................................................... 19
9/09—Rev. A to Rev. B
Updated Outline Dimensions ....................................................... 18
Changes to Ordering Guide .......................................................... 19
3/09—Rev. 0 to Rev. A
Changes to Features and General Description Sections ..............1
Changes to Input and Output Capacitor Parameter.....................4
Changes to Figure 17 to Figure 20...................................................9
Changes to Figure 49...................................................................... 17
Added Figure 50 ............................................................................. 17
Changes to Ordering Guide .......................................................... 19
7/08—Revision 0: Initial Version
Rev. G | Page 2 of 20
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GENERAL DESCRIPTION
The ADP121 is a quiescent current, low dropout, linear regulator that operates from 2.3 V to 5.5 V and provides up to 150 mA of output current. The low 135 mV dropout voltage at 150 mA load improves efficiency and allows operation over a wide input voltage range. The low 30 μA of quiescent current at full load makes the ADP121 ideal for battery-operated portable equipment.
The ADP121 is available in output voltages ranging from 1.2 V to 3.3 V. The parts are optimized for stable operation with small 1 μF ceramic output capacitors. The ADP121 delivers good transient performance with minimal board area.
Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions. The ADP121 is available in a tiny 5-lead TSOT and 4-ball 0.4 mm pitch halide-free WLCSP packages and utilizes the smallest footprint solution to meet a variety of portable applications.

FEATURES
  Input voltage range: 2.3 V to 5.5 V
  Output voltage range: 1.2 V to 3.3 V
  Output current: 150 mA
  Low quiescent current
     IGND = 11 μA with 0 μA load
     IGND = 30 μA with 150 mA load
  Low shutdown current: <1 μA
  Low dropout voltage
     90 mV @ 150 mA load
  High PSRR
     70 dB @ 1 kHz at VOUT = 1.2 V
     70 dB @ 10 kHz at VOUT = 1.2 V
  Low noise: 40 μV rms at VOUT = 1.2 V
  No noise bypass capacitor required
  Output voltage accuracy: ±1%
  Stable with a small 1 μF ceramic output capacitor
  Current limit and thermal overload protection
  Logic controlled enable
  5-lead TSOT package
  4-ball 0.4 mm pitch WLCSP
 
APPLICATIONS
  Mobile phones
  Digital cameras and audio devices
  Portable and battery-powered equipment
  Post dc-to-dc regulation
  Post regulation

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