ADP7118, ADP7142 Guide Datasheet by Analog Devices Inc.

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ANALOG DEVICES ANALOG 6ND DEVICES 00 .. ADP7142/ADP71187EVAL .. C2 ANALOG 6ND DEVICES 00 ADP7142/ADP7118-EVAL .. ANALOG DEVICES ADP714Z/71187EVALZ (3ND
ADP7118/ADP7142 User Guide
UG-616
One Technology Way P. O. Box 9106 Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 www.analog.com
Evaluating the ADP7118/ADP7142 20 V/40 V, 200 mA, Low Noise, CMOS LDOs
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS. Rev. A | Page 1 of 9
FEATURES
Input voltage range for the ADP7118: 2.7 V to 20 V
Input voltage range for the ADP7142: 2.7 V to 40 V
Output current range: 0 mA to 200 mA
Output voltage accuracy: ±0.8%
Operating temperature range: −40°C to +125°C
Adjustable option voltage set with two external resistors
VOUT = 1.2 V × (1 + R1/R2)
GENERAL DESCRIPTION
The ADP7118/ADP7142 evaluation boards demonstrate the
functionality of the ADP7118/ADP7142 series of linear regulators.
Simple device measurements such as line and load regulation,
dropout, and ground current can be demonstrated with just a
single voltage source, a voltmeter, an ammeter, and load resistors.
For more details on the ADP7118 and ADP7142 linear regulators,
refer to the corresponding data sheets.
EVALUATION BOARDS
11813-001
Figure 1. ADP7118/ADP7142 LFCSP Evaluation Board
11813-002
Figure 2. ADP7118/ADP7142 TSOT Evaluation Board
11813-003
Figure 3. ADP7118/ADP7142 SOIC Evaluation Board
UG-616 ADP7118/ADP7142 User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Evaluation Boards ............................................................................. 1
Revision History ............................................................................... 2
Evaluation Board Hardware and Schematic ................................. 3
Evaluation Board Configurations .............................................. 3
Output Voltage Measurements ....................................................... 5
Line Regulation ..............................................................................6
Load Regulation ............................................................................6
Dropout Voltage ............................................................................6
Ground Current Measurement ........................................................7
Ground Current Consumption ...................................................8
Ordering Information .......................................................................9
Bill of Materials ..............................................................................9
REVISION HISTORY
1/15—Rev. 0 to Rev. A
Changes to Table 3 and Table 4 ....................................................... 9
10/14Revision 0: Initial Version
Rev. A | Page 2 of 9
m m
ADP7118/ADP7142 User Guide UG-616
EVALUATION BOARD HARDWARE AND SCHEMATIC
EVALUATION BOARD CONFIGURATIONS
The ADP7118/ADP7142 evaluation boards come supplied with
different components depending on which package option is
ordered. Components common to all package options are C1,
C2, R1, R2, R3, JP1, and JP2. Resistor R1 and Resistor R2 are
used only for the adjustable output option. The output voltage is
set by
VOUT = 1.2 V × (1 + R1/R2)
Note that only the LFCSP and SOIC package options have the
soft start capacitor, C3.
All three package options allow the use of the noise reduction
network. The LFCSP and the SOIC use C4 and R3, while the
TSOT uses C3 and R3.
Figure 4, Figure 5, and Figure 6 show the evaluation board
configuration schematics of the LFCSP, the SOIC, and the
TSOT, respectively. The ADP7142 can handle up to 40 V of
input voltage, whereas the ADP7118 can handle up to 20 V of
input voltage.
11813-004
CON8 CON2
NOTES
1. THE VALUES OF R3 AND C4 DEPEND ON THE LOW FREQUENCY ZERO OF THE NOISE REDUCTION NETWORK. SEE DATA SHEET FOR DESIGN DETAILS.
TP1
U3
TP4
1
1 5
4
6
1
2
3
1
J1
J2
VIN VOUT VOUT
C1
2 1
1
JP1
1 WAY LINK
2.2µF
2
3
1
2
4
5
6
7
8
CON8
1
J3
2
3
4
5
6
7
8
C3
1nF
C2
C4
R2
10kΩ
R1
17.4kΩ
R3
xxkΩ
JP2
1 WAY LINK
xxnF
2.2µ
TP2
1
2
1
TP3
VIN
SS
EN
VOUT
SENSE/ADJ
ADP7118/
ADP7142
GND
Figure 4. LFCSP Evaluation Board Schematic
11813-005
CON8
CON2
TP1
17
8
6
5
2 1
1 2
2
1
3
4
J1
J2
VIN VOUT VOUT
1
JP1
1 WAY LINK
2
3
1
2
4
5
6
7
8
CON8
1
J3
2
3
4
5
6
7
8
C1 C3
10nF
C2
C4
R2
10kΩ
R1
17.4kΩ
R3
xxkΩ
JP2
1 WAY LINK
xxnF
2.2µF
2.2µF
TP2
TP3
1
1
SS
VIN
VIN
EN GND
SENSE/ADJ
VOUT
VOUT
U1
NOTES
1. THE VALUES OF R3 AND C4 DEPEND ON THE LOW FREQUENCY ZERO OF THE NOISE REDUCTION NETWORK. SEE DATA SHEET FOR DESIGN DETAILS.
ADP7118/
ADP7142
Figure 5. SOIC Evaluation Board Schematic
11813-006
CON8
CON2
TP1
11
2
3
2 1
1
2
5
4
J1
J2
VIN VOUT VOUT
1
JP1
1 WAY LINK
2
3
1
2
4
5
6
7
8
CON8
1
J3
2
3
4
5
6
7
8
C1 C2
C3
R2
10kΩ
R1
17.4kΩ
R3
xxkΩ
JP2
1 WAY LINK
xxnF
2.2µF
2.2µF
TP2
1
GND
EN
VIN VOUT
SENSE/ADJ
TP3
1
U1
NOTES
1. THE VALUES OF R3 AND C3 DEPEND ON THE LOW FREQUENCY ZERO OF THE NOISE REDUCTION NETWORK. SEE DATA SHEET FOR DESIGN DETAILS.
ADP7118/
ADP7142
Figure 6. TSOT Evaluation Board Schematic
Rev. A | Page 3 of 9
Table L Evaluation Board Hardware Componcms (LFCSP and SOIC)
UG-616 ADP7118/ADP7142 User Guide
Table 1. Evaluation Board Hardware Components (LFCSP and SOIC)
Component Function Description
U1, U31 Linear regulator ADP7118/ADP7142 are linear regulators.
C1 Input capacitor C1 is a 2.2 μF input bypass capacitor.
C2 Output capacitor C2 is a 2.2 μF output capacitor that is required for stability and transient performance.
C3 Soft start capacitor C3 sets the soft start time to limit inrush current.
C4 Noise reduction capacitor C4 is used with R3 for the noise reduction network.
R1 Output divider R1 sets the output voltage to 3.3 V with R2 in the adjustable option. R2 = 17.4 .
R2 Output divider R2 sets the output voltage to 3.3 V with R1 in the adjustable option. R1 = 10 .
R3 Noise reduction resistor R3 is used with C4 for the noise reduction network.
JP1 Jumper JP1 connects the EN pin to VIN for automatic startup.
JP2 Jumper JP2 connects the SENSE/ADJ pin to output for fixed output options.
1 Component varies depending on the type of evaluation board ordered.
Table 2. Evaluation Board Hardware Components (TSOT)
Component Function Description
U11 Linear regulator ADP7118/ADP7142 are linear regulators.
C1 Input capacitor C1 is a 2.2 μF input bypass capacitor.
C2
Output capacitor
C2 is a 2.2 μF output capacitor that is required for stability and transient performance.
C3 Noise reduction capacitor C3 is used with R3 for the noise reduction network.
R1 Output divider R1 sets the output voltage to 3.3 V with R2 in the adjustable option. R2 = 17.4 kΩ.
R2 Output divider R2 sets the output voltage to 3.3 V with R1 in the adjustable option R1 = 10 .
R3 Noise reduction resistor R3 is used with C3 for the noise reduction network.
JP1 Jumper JP1 connects the EN pin to VIN for automatic startup.
JP2 Jumper JP2 connects the SENSE/ADJ pin to output for fixed output options.
1 Component varies depending on the type of evaluation board ordered.
Rev. A | Page 4 of 9
VIN ANALOG DEVICES ADP7142/7118 EVALZ glflflgg VOUT VIN mu a E» JPI R2! {Q E @E 0 END ANALOG DEVICES ADP7142/ADP7HB-EVAL . 6ND ANALOG DEVICES ADP7142/71187EVALZ I vow \ , I‘m REC F2 E:|EIR3 .C3 “N 31%. JPZ /ADJ y—‘QGND o. 6ND ND
ADP7118/ADP7142 User Guide UG-616
Rev. A | Page 5 of 9
OUTPUT VOLTAGE MEASUREMENTS
+
VOLTMETER
1.99711
+
VOLTAGE SOURCE
LOAD
11813-007
+
VOLTMETER
1.99711
+
VOLTAGE SOURCE
LOAD
Figure 7. Output Voltage Measurement, LFCSP
11813-008
+
VOLTMETER
1.99711
+
VOLTAGE SOURCE
LOAD
Figure 8. Output Voltage Measurement, SOIC
11813-009
+
VOLTMETER
1.99711
+
VOLTAGE SOURCE
LOAD
Figure 9. Output Voltage Measurement, TSOT
Figure 7, Figure 8, and Figure 9 show how the different
evaluation boards can be connected to a voltage source and a
voltmeter for basic output voltage accuracy measurements. A
resistor can be used as the load for the regulator. Ensure that the
resistor has a power rating that can adequately handle the
power expected to be dissipated across it. An electronic load
can also be used as an alternative. Ensure that the voltage source
can supply enough current for the expected load levels.
3,35 3.; 3.35 E >
UG-616 ADP7118/ADP7142 User Guide
Use the following steps to connect the evaluation boards to a
voltage source and voltmeter:
1. Connect the negative terminal (−) of the voltage source to
one of the GND pads on the evaluation board.
2. Connect the positive terminal (+) of the voltage source to
the VIN pad on the evaluation board.
3. Connect a load between the VOUT pad and one of the
GND pads.
4. Connect the negative terminal (−) of the voltmeter to one
of the GND pads.
5. Connect the positive terminal (+) on the voltmeter to the
VOUT pad.
The voltage source can now be turned on. If J1 is inserted
(connecting the EN pin to VIN for automatic startup), the
regulator powers up.
If the load current is large, the user must connect the voltmeter
as close as possible to the output capacitor to reduce the effects
of IR drops.
LINE REGULATION
For line regulation measurements, the output of the regulator is
monitored while the input of the regulator is varied. For good
line regulation, the output must change as little as possible with
varying input levels. To ensure that the device is not in dropout
during this measurement, VIN must be varied between
VOUTNOM + 1 V (or 2.7 V, whichever is greater) and VINMAX. For
example, for an ADP7142 with a 3.3 V output, VIN must vary
between 4.3 V and 40 V (20 V for the ADP7118). This
measurement can be repeated under different load conditions.
Figure 10 shows the typical line regulation performance of an
ADP7142 with a 3.3 V output.
0 10 20 30 405 15 25 35
V
OUT
(V)
V
IN
(V)
3.25
3.27
3.29
3.31
3.33
3.35
LOAD =100µA
LOAD =1mA
LOAD =10mA
LOAD =50mA
LOAD =100mA
LOAD =200mA
11813-010
Figure 10. Output Voltage (VOUT) vs. Input Voltage (VIN)
LOAD REGULATION
For load regulation measurements, the output of the regulator is
monitored, while the load is varied. For good load regulation,
the output must change as little as possible with varying loads.
The input voltage must be held constant during this
measurement. The load current can be varied from 0 mA to
200 mA. Figure 11 shows the typical load regulation
performance of an ADP7142 with a 3.3 V output for an input
voltage of 4.3 V.
Figure 11. Output Voltage (VOUT) vs. Load Current (ILOAD)
DROPOUT VOLTAGE
Dropout voltage can be measured using the configuration
shown in Figure 7. Dropout voltage is defined as the input to
output voltage differential when the input voltage is set to the
nominal output voltage. Dropout voltage applies only for output
voltages greater than 2.8 V. Dropout voltage increases with
larger loads. For more accurate measurements, a second
voltmeter can be used to monitor the input voltage across the
input capacitor. The input supply voltage may need to be
adjusted to account for IR drops, especially if large load
currents are used. Figure 12 shows a typical curve of dropout
voltage measurements with different load currents.
11813-012
3.1 3.3 3.73.5 3.9
V
OUT
(V)
VIN (V)
2.8
2.9
3.0
3.1
3.2
3.4
3.3
LOAD =5mA
LOAD =10mA
LOAD =50mA
LOAD =100mA
LOAD =150mA
LOAD =200mA
Figure 12. Output Voltage (VOUT) in Dropout vs. Load Current (ILOAD)
Rev. A | Page 6 of 9
6ND ANALOG DEVICES ADP7142/7118 EVALZ @ J, 61- Ugl—‘cz .LEEEVOUT . . VIN Rlfl P m ME El 2 VIN I > :1 413 E SE 2 lEIJ2 Q Q . . (3ND 6ND PN— ANAKOG >DEVICES ® .. ADP7142/ADP71167EVAL . . . . 6ND P” GNI) ANALOG 6ND DEVICES
ADP7118/ADP7142 User Guide UG-616
Rev. A | Page 7 of 9
GROUND CURRENT MEASUREMENT
11813-013
+
VOLTAGE SOURCE
LOAD
+
AMMETER
0.00112
Figure 13. Ground Current Measurement, LFCSP
11813-014
+
-
VOLTAGE SOURCE
LOAD
+
-
AMMETER
0.00112
Figure 14. Ground Current Measurement, SOIC
11813-015
+
-
VOLTAGE SOURCE
LOAD
+
-
AMMETER
0.00112
Figure 15. Ground Current Measurement, TSOT
an» :5 :EEG 550mm
UG-616 ADP7118/ADP7142 User Guide
Figure 13, Figure 14, and Figure 15 show how the evaluation
boards can be connected to a voltage source and an ammeter
for ground current measurements. A resistor can be used as the
load for the regulator. Ensure that the resistor has a power
rating that can adequately handle the power expected to be
dissipated across it. An electronic load can be used as an
alternative. Ensure that the voltage source used can supply
enough current for the expected load levels.
Use the following steps to connect the evaluation boards to a
voltage source and an ammeter:
1. Connect the positive terminal (+) of the voltage source to
the VIN pad on the evaluation board.
2. Connect the positive terminal (+) of the ammeter to one of
the GND pads of the evaluation board.
3. Connect the negative terminal (−) of the ammeter to the
negative (−) terminal of the voltage source.
4. Connect a load between the negative (−) terminal of the
voltage source and the VOUT pad of the evaluation board.
The voltage source can now be turned on. If J1 is inserted
(connecting the EN pin to VIN for automatic startup), the
regulator powers up.
GROUND CURRENT CONSUMPTION
Ground current measurements can determine how much
current the internal circuits of the regulator are consuming
while the circuits perform the regulation function. To be
efficient, the regulator needs to consume as little current as
possible. The regulator typically uses the maximum current
when supplying its largest load level (200 mA). Figure 16 shows
the typical ground current consumption vs. load current at an
input voltage of 6 V for an output voltage of 3.3 V.
11813-016
800
700
600
500
400
300
200
100
0
0.1 1 10 100 1k
I
LOAD
(mA)
GROUND CURRENT (µA)
Figure 16. Ground Current vs. Load Current (ILOAD)
When the device is disabled (EN = GND), the ground current
drops to less than 1 µA.
Rev. A | Page 8 of 9
Table 4‘ TSOT Bill of Materials ANALOG DEVICES www.ana|ug.cum
ADP7118/ADP7142 User Guide UG-616
ORDERING INFORMATION
BILL OF MATERIALS
Table 3. SOIC and LFCSP Bill of Materials
Quantity Reference Designator Description Manufacturer/Vendor Vendor Part Number
1 U1, U31 ADP7118 or ADP7142 Analog Devices, Inc. ADP7118CP, ADP7142CP,
ADP7118RD, or ADP7142RD
2 C1, C2 Capacitors, MLCC, 2.2 μF, 100 V, 1210, X7R Murata (or equivalent) GRM32ER72A225KA35
1
C3 (not installed)
Capacitor, MLCC, 0805 case
Not applicable
Not applicable
1 C4 (not installed) Capacitor, MLCC, 0805 case Not applicable Not applicable
2 JP1, JP2 Header, single, 2 pins Sullins Connector Solutions PEC02SAAN
1 R1 Resistor, 1%, 0805 case, 17.4 Vishay Dale or equivalent CRCW080517K4FKEA
1 R2 Resistor, 1%, 0805 case, 10 Vishay Dale or equivalent CRCW080510K0FKEA
1 R3 (not installed) Resistor, 1%, 0805 case Not applicable Not applicable
1 Component varies depending on the type of evaluation board ordered.
Table 4. TSOT Bill of Materials
Quantity Reference Designator Description Manufacturer/Vendor Vendor Part Number
1 U11 ADP7118 or ADP7142 Analog Devices, Inc. ADP7118UJ or ADP7142UJ
2 C1, C2 Capacitors, MLCC, 2.2 μF, 100 V, 1210, X7R Murata (or equivalent) GRM32ER72A225KA35
1 C3 (not installed) Capacitor, MLCC, 0805 case Not applicable Not applicable
2 JP1, JP2 Header, single, 2 pins Sullins Connector Solutions PEC02SAAN
1 R1 Resistor, 1%, 0805 case, 17.4 kΩ Vishay Dale or equivalent CRCW080517K4FKEA
1 R2 Resistor, 1%, 0805 case, 10 kΩ Vishay Dale or equivalent CRCW080510K0FKEA
1 R3 (not installed) Resistor, 1%, 0805 case Not applicable Not applicable
1 Component varies depending on the type of evaluation board ordered.
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the Evaluation Board”), you are agreeing to be bound by the terms and conditions
set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you
have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This
Agreement is made by and between you (“Customer”) and Analog Devices, Inc.
(“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal,
temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation
Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided
for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional
limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term
“Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including
ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may
not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to
promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any
occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board.
Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMI
NATION. ADI may terminate this Agreement at any time upon giving written notice
to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED AS IS” AND ADI MAKES NO
WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED
TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL
PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF
THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS
OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE
AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable
United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and const
rued in accordance with the substantive laws of the Commonwealth of
Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby
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©20142015 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
UG11813-0-1/15(A)
Rev. A | Page 9 of 9

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