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ADP123-EVALZ

P1-P3P4-P6P7-P9P10-P12
Evaluation Board User Guide
UG-055
One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Te l: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Setting Up the Evaluation Board for the ADP122/ADP123
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. A | Page 1 of 12
FEATURES
Input voltage range: 2.3 V to 5.5 V
Output current range: 0 mA to 300 mA
Output voltage accuracy: ±1%
Operating temperature range: −40°C to +125°C
GENERAL DESCRIPTION
This user guide explains the functionality of the ADP122/
ADP123 linear regulators.
Simple device measurements, such as line and load regulation,
dropout voltage, and ground current can be achieved with only
a single voltage supply, a voltage meter, a current meter, and
load resistors.
For more information about the ADP122/ADP123 linear
regulators, see the ADP122/ADP123 data sheets.
EVALUATION BOARD CONNECTION DIAGRAMS
08524-001
Figure 1. ADP122 PCB Layout
08524-002
Figure 2. ADP123 PCB Layout
UG-055 Evaluation Board User Guide
Rev. A | Page 2 of 12
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Evaluation Board Connection Diagrams ...................................... 1
Revision History ............................................................................... 2
Evaluation Board Hardware ............................................................ 3
Evaluation Board Configurations .............................................. 3
Output Voltage Measurements ....................................................... 4
Line Regulation Measurements .................................................. 5
Load Regulation Measurements ..................................................5
Dropout Voltage Measurements ..................................................5
Ground Current Measurements ......................................................6
Ground Current Consumption ...................................................7
Ordering Information .......................................................................8
Bill of Materials for the Evaluation Board .................................8
Bill of Materials for the ADP122UJZ-REDYKIT ......................8
REVISION HISTORY
6/10—Rev. 0 to Rev. A
Changes to Figure 10 ........................................................................ 6
Changes to Bill of Materials for the ADP122UJZ-REDYKIT
Section ................................................................................................ 8
3/10—Revision 0: Initial Version
Evaluation Board User Guide UG-055
Rev. A | Page 3 of 12
EVALUATION BOARD HARDWARE
EVALUATION BOARD CONFIGURATIONS
The ADP122/ADP123 evaluation boards are supplied with
different components, depending on the version that is ordered.
Components common to both versions are C1, C2, TP1, TP2, and
J1. Figure 3 and Figure 4 show the schematics of the ADP122
and ADP123 evaluation board configurations. Table 1 describes
the components.
1
2
3
5
4
08524-003
C2
TP1 TP2
C1
J1
V
OUT
V
IN
VOUT
NC
VIN
GND
EN
U1
Figure 3. ADP122 Evaluation Board Schematic
1
2
3
5
4
08524-004
C2
R1
R2
TP1 TP2
TP3
C1
J1
V
OUT
V
IN
VOUT
ADJ
VIN
GND
EN
U1
Figure 4. ADP123 Evaluation Board Schematic
Table 1. Evaluation Board Hardware Components
Component Description
U1
1
ADP122/ADP123 low dropout linear regulators
C1 Input bypass capacitor, 1 μF, 0603 size
C2 Output capacitor, 1 μF, 0603 size
J1
Jumper (connects EN to VIN for automatic
startup)
TP1 Test point closer to VIN
TP2 Test point closer to VOUT
TP3
Test point closer to ADJ (ADP123 evaluation
board only)
R1, R2
0603 size feedback resistors between VOUT and
ADJ (ADP123 evaluation board only)
1
Component depends on evaluation board type ordered.
P1-P3P4-P6P7-P9P10-P12

ADP123-EVALZ

Mfr. #:
Buy ADP123-EVALZ
Manufacturer:
Analog Devices / Linear Technology
Description:
Power Management IC Development Tools ADP123 Eval Brd
Lifecycle:
New from this manufacturer.
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