UG-439: Evaluation Board for the ADP5034 TSSOP Micro Power Management Unit

UG-439: Evaluation Board for the ADP5034 TSSOP Micro Power Management Unit
Evaluation Board User Guide
UG-439
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
Evaluation Board for the ADP5034 TSSOP
Micro Power Management Unit (PMU)
FEATURES
GENERAL DESCRIPTION
Full-featured evaluation board for the ADP5034 TSSOP
Standalone capability
Simple device measurements, including line and load
regulation, demonstrable with
A single voltage supply
A voltmeter
An ammeter
Load resistors
Easy access to external components
Cascading options to supply the low dropout (LDO) from
either buck
Dedicated enable option for each channel
Mode option to change bucks from PFM to PWM operation
This user guide describes the hardware for the evaluation of the
ADP5034 and includes detailed schematics and PCB layouts.
The ADP5034 is available in either a 24-lead LFCSP package
or a 28-lead TSSOP package. Note that this user guide refers to
the ADP5034 TSSOP. Refer to UG-271 for information on the
ADP5034 LFCSP.
The ADP5034 TSSOP evaluation board has two step-down
regulators with two LDOs that enable evaluation of the
ADP5034. The evaluation board is available in an adjustable
voltage option.
Full details on the part are provided in the appropriate product
data sheet available from Analog Devices, Inc., which should be
consulted in conjunction with this evaluation board user guide.
10895-001
DIGITAL PICTURE OF THE ADP5034 TSSOP EVALUATION BOARD
Figure 1. ADP5034 TSSOP Evaluation Board
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 16
UG-439
Evaluation Board User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1
Measuring Output Voltage ...............................................................8
General Description ......................................................................... 1
Measuring Ground Current .............................................................9
Digital Picture of the ADP5034 TSSOP Evaluation Board ......... 1
Evaluation Board Schematics and Artwork ................................ 10
Revision History ............................................................................... 2
Ordering Information .................................................................... 13
Using the Evaluation Board............................................................. 3
Bill of Materials ........................................................................... 13
Powering Up the Evaluation Board ............................................ 3
Related Links ................................................................................... 13
Measuring Evaluation Board Performance .................................. 4
REVISION HISTORY
8/12—Revision 0: Initial Version
Rev. 0 | Page 2 of 16
Evaluation Board User Guide
UG-439
USING THE EVALUATION BOARD
If an ammeter is used, connect it in series with the load. Connect
the positive (+) ammeter terminal to the evaluation board for
Buck 1, VOUT1, the negative (−) ammeter terminal to the
positive (+) load terminal, and the negative (−) load terminal
to the evaluation board at PGND.
POWERING UP THE EVALUATION BOARD
The ADP5034 TSSOP evaluation board is supplied fully
assembled and tested. Before applying power to the evaluation
board, follow the procedures in this section.
Enable
Each channel has its own enable pin, which must be pulled high
to enable that channel (see Table 1).
Table 1. Channels of the Enable Pin
Channel
1
2
3
4
Enable Pin
JEN1
JEN2
JEN3
JEN4
Input and Output Voltmeters
Measure the input and output voltages with voltmeters. Make
sure that the voltmeters are connected to the appropriate evaluation board terminals and not to the load or power sources
themselves.
If the voltmeters are not connected directly to the evaluation
board, the measured voltages will be incorrect due to the
voltage drop across the leads and/or connections between the
evaluation board, the power source, and/or the load.
Jumper JMODE (MODE)
The Jumper JMODE as shown in Figure 1 is used to connect
the MODE pin of the device to either ground or VIN1. To force
Buck 1 and Buck 2 into forced PWM operation, shunt the
center contact of jumper JMODE to the top pin header to pull
the MODE pin high to VIN1. To allow Buck 1 and Buck 2 to
operate in automatic PWM/PSM operation, shunt the center
contact of JMODE to the bottom pin header to pull the MODE
pin low to PGND.
Connect the input voltage measuring voltmeter positive
terminal (+) to the evaluation board at VIN1, and input voltage
measuring voltmeter negative (−) terminal to the evaluation
board at PGND.
Connect the output voltage measuring voltmeter positive (+)
terminal to the evaluation board at VOUT1 for measuring
the output voltage of Buck 1, and the output voltage measuring
voltmeter negative (−) terminal to the evaluation board
at GND.
Input Power Source
Turning On the Evaluation Board
If the input power source includes a current meter, use that meter
to monitor the input current. VIN1 directly connects to AVIN and
VIN2. Attach a header on JVIN3 to connect the supply of LDO1
to VIN1, and attach a header on JVIN4 to connect the supply of
LDO2 to VIN1. Connect the positive terminal of the power source
to VIN1 on the evaluation board and the negative terminal of the
power source to PGND.
When the power source and load are connected to the evaluation
board, the board can be powered for operation. Ensure that:
If the power source does not include a current meter, connect a
current meter in series with the input source voltage. Connect
the positive lead (+) of the power source to the ammeter
positive (+) connection, the negative lead (−) of the power
source to PGND on the evaluation board, and the negative
lead (−) of the ammeter to VIN1 on the board. Be aware that
the current meters add resistance to the input source, and this
voltage reduces with high output currents.
The desired channel is enabled and monitors the output voltage.
Output Load
Connect an electronic load or resistor to set the load current. If
the load includes an ammeter, or if the current is not measured,
connect the load directly to the evaluation board, with the positive
(+) load connected to one of the channels. For example, connect
Buck 1 output, VOUT1, and the negative (−) load connection
to PGND.
The power source voltage for the Bucks (VIN1, VIN2) is from
2.3 V to 5.5 V. The power source voltage for the LDOs (VIN3,
VIN4) is from VOUTLDO + 0.5 V or 1.7 V (whichever is greater) to
5.5 V. Note that VIN3 and VIN4 should be the same or below the
voltage supplied on VIN1 and VIN2.
If the load is not enabled, enable the load; check that it is drawing
the proper current and that the output voltage maintains voltage
regulation.
Setting the Output Voltage of the Bucks
The buck output voltage is set through external resistor dividers, shown in Figure 2 for Buck 1. The output voltage can
optionally be factory programmed to default values as indicated
in the data sheet. In this event, R1 and R2 are not needed, and
FB1 can be left unconnected. In all cases, VOUT1 must be
connected to the output capacitor. FB1 is 0.5 V.
Rev. 0 | Page 3 of 16
UG-439
Evaluation Board User Guide
VOUT1
VIN1
SW1
L1
1µH
VOUT1
BUCK
FB1
VOUT1 = VFB1
C5
10µF
R2
10895-002
AGND
R1
R1
+1
R2
10895-004
Figure 2. BUCK1 External Output Voltage Setting
Setting the Output Voltage of the LDOs
Each LDO output voltage is set through external resistor dividers
as well as shown in Figure 3 for LDO1. The output voltage can
optionally be factory programmed to default values as indicated in
the data sheet. In this event, FB3 must be connected to the top of
the capacitor on VOUT3 by placing a 0 Ω resistor on RTOP, and
leave RBOT unpopulated. Refer to Table 2 for the corresponding
0 Ω resistor placements on RTOP per channel.
VIN3
VOUT3
VOUT3
LDO1
FB3
RTOP
C7
1µF
To observe the switching waveform with an oscilloscope, place
the oscilloscope probe tip at the end of the inductor with the
probe ground at GND. Set the oscilloscope to dc, 2 V/division,
and 200 ns/division time base. When the MODE pin is set to
high, the buck regulators operate in forced PWM mode. When
the MODE pin is set to low, the buck regulators operate in
PWM mode when the load is above a predefined threshold.
When the load current falls below a predefined threshold, the
regulator operates in power save mode (PSM), improving the
light load efficiency. Typical PWM and PSM switching
waveforms are shown in Figure 5 and Figure 6.
10895-003
RBOT
Figure 4. Measuring Output Voltage Ripple
Measuring the Switching Waveform of Buck
VOUT1 = VFB3 R1 + 1
R2
T
VOUT
Figure 3. LDO1 External Output Voltage Setting
1
External Resistor Divider Setting for Bucks and LDOs
The ADP5034 TSSOP demo boards are supplied with fixed
resistors with values chosen for a target output voltage. Varying
the resistor values of the resistor divider networks varies the
output voltage accordingly.
ISW
2
SW
Table 2. External Resistor Dividers
Buck2
RT2
RB2
LDO1
RT3
RB3
LDO2
RT4
RB4
MEASURING EVALUATION BOARD PERFORMANCE
4
CH2 500mA Ω
CH4 2.00V
CH1 50.0mV
M 4.00µs
A CH2
240mA
T 28.40%
10895-005
Buck1
RT1
RB1
Figure 5. Typical Waveforms, VOUT1 = 3.3 V, IOUT1 = 30 mA, PSM Mode
Measuring Output Voltage Ripple of the Buck Regulator
T
To observe the output voltage ripple of Buck 1, place an oscilloscope probe across the output capacitor (COUT_1) with the probe
ground lead at the negative (−) capacitor terminal and the probe
tip at the positive (+) capacitor terminal.
Set the oscilloscope to ac, 10 mV/division, and 2 µs/division
time base, with BW set to 20 MHz to avoid noise to interfere
with the measurements. It is also recommended to shorten the
ground loop of the oscilloscope probe to minimize coupling. A
good way of measuring the output voltage ripple is to solder a
wire to the negative (−) capacitor terminal and wrap it around
the barrel of the probe, while the tip directly connects to the
positive (+) capacitor terminal as shown on Figure 4.
Rev. 0 | Page 4 of 16
VOUT
1
ISW
2
SW
4
CH1 50mV
BW
CH2 500mA Ω
M 400ns A CH2
BW
CH4 2.00V
T 28.40%
220mA
10895-006
Resistor Divider
RTOP
RBOT
Figure 6. Typical Waveforms, VOUT1 = 3.3 V, IOUT1 = 30 mA, PWM Mode
Evaluation Board User Guide
UG-439
Measuring Load Regulation of Buck
Measuring Efficiency of Buck
Test the load regulation by increasing the load at the output and
looking at the change in output voltage. The input voltage must be
held constant during this measurement. To minimize voltage drop,
use short low resistance wires, especially for loads approaching
maximum current.
Measure the efficiency, η, by comparing the input power with
the output power.
1.7985
η=
VOUT × I OUT
VIN × I IN
Measure the input and output voltages as close as possible to the
input and output capacitors to reduce the effect of IR drops.
1.7980
100
VIN = 5.5V
1.7975
PSM
90
PWM
70
EFFICIENCY (%)
VOUT (V)
80
1.7970
VIN = 3.6V
1.7965
1.7960
VIN = 2.3V
1.7955
60
50
40
30
100 200 300 400 500 600 700 800 900 1000 1100 1200
ILOAD (mA)
10
0
Figure 7. Buck Load Regulation
1
Measure the inductor current by removing one end of the inductor
from its pad and connecting a current loop in series. A current
probe can be connected to this wire.
1.7985
1.7980
ILOAD = 0mA
ILOAD = 800mA
1.7970
ILOAD = 200mA
1.7965
ILOAD = 1200mA
1.7955
3.5
4.0
4.5
VIN (V)
5.0
5.5
10895-008
VOUT (V)
1.7975
3.0
10k
Measuring Inductor Current
1.7990
2.5
1k
Figure 9. Buck Efficiency, VIN = 3.6 V, VOUT = 1.8 V
Test the line regulation by increasing the input voltage and
examining the change in the output voltage.
1.7950
2.0
100
ILOAD (mA)
Measuring Line Regulation of Buck
1.7960
10
10895-009
0
10895-007
20
1.7950
Figure 8. Buck Line Regulation
Rev. 0 | Page 5 of 16
UG-439
Evaluation Board User Guide
Measuring Line Regulation of LDO
3.3160
For line regulation measurements, the output of the regulator is
monitored while its input is varied. For good line regulation, the
output must change as little as possible with varying input levels.
3.3155
To ensure that the device is not in dropout mode during this
measurement, VIN must be varied between VOUT nominal + 0.5 V
(or 2.3 V, whichever is greater) and VIN maximum. For example,
a fixed 3.3 V output needs VIN to be varied between 3.8 V and
5.5 V. This measurement can be repeated under different load
conditions. Figure 10 shows the typical line regulation
performance of the LDO with a fixed 3.3 V output.
3.3140
3.3150
VIN = 5.5V
VOUT (V)
3.3145
VIN = 4.2V
3.3135
3.3130
3.3125
VIN = 3.6V
3.3120
0
ILOAD = 1mA
200
250
300
Measuring Dropout Voltage of LDO
3.315
VOUT (V)
150
Figure 11. LDO Load Regulation
ILOAD = 10mA
ILOAD = 100mA
3.314
3.313
ILOAD = 300mA
ILOAD = 200mA
4.1
4.6
5.1
VIN (V)
5.6
10895-010
3.311
3.6
100
ILOAD (mA)
3.316
3.312
50
10895-011
3.3115
3.3110
3.317
Figure 10. LDO Line Regulation
Measuring Load Regulation of LDO
For load regulation measurements, the regulator output 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 300 mA. Figure 11
shows the load regulation performance of the LDO with a 3.3 V
output for different input voltages.
Dropout voltage is defined as the input-to-output voltage
differential when the input voltage is set to the nominal output
voltage. One way to measure dropout voltage is to get the
output voltage (VOUT nominal) with VIN initially set to VOUT
nominal + 0.5 V; output load can be set to 100 µA. Then, force the
input voltage equal to VOUT nominal, and measure the output
voltage accordingly (VOUT dropout). Dropout voltage is then
calculated as VOUT nominal − VOUT dropout. This applies only for
output voltages greater than 1.7 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.
Measuring Ground Current Consumption of LDO
Ground current measurements can determine how much current
the internal circuits of the regulator consume while the circuits
perform the regulation function. To be efficient, the regulator
needs to consume as little current as possible. Typically, the
regulator uses the maximum current when supplying its largest
load level (300 mA). When the device is disabled, the ground
current drops to less than 1 µA. Refer to Figure 14 for a detailed
instruction on how to perform ground current measurements.
Rev. 0 | Page 6 of 16
Evaluation Board User Guide
UG-439
Cascading an LDO from the Buck Regulator
by shunting the jumper JV3V1. Subsequently, VIN4, which
is the supply of LDO2 can also be connected to VOUT2
through jumper JV4V2. In this configuration, the output
voltage of the buck regulator should have enough headroom
with the desired output voltage of the LDO to guarantee the
LDO to operate within specifications.
For certain applications such as analog circuit supplies, the
LDOs are preferred because of its better noise performance
than the bucks. Where not all the buck outputs are being used,
the input supply of the LDOs can be taken from these outputs.
An example demo board connection is shown in Figure 12
wherein VOUT1 is tied to VIN3, which is the supply of LDO1,
VOLTAGE
SOURCE
VOLTMETER
1.99711
–
+
–
10895-012
+
Figure 12. Cascading LDO from Buck
Rev. 0 | Page 7 of 16
UG-439
Evaluation Board User Guide
MEASURING OUTPUT VOLTAGE
Figure 13 shows how the evaluation board can be connected
to a voltage source and a voltmeter for basic output voltage
accuracy measurements. It shows a voltage source connected to
VIN1 and a voltmeter connected to VOUT1S, which is the output
voltage sense terminal of Buck 1. JEN1 is connected to VIN1 via a
shunt which enables Buck 1; JEN2, JEN3, and JEN4 are connected
to ground, disabling the other channels.
When measuring the voltages on VOUT2, VOUT3, and VOUT4,
make sure that the respective channels are enabled, and the voltmeters are connected to the respective outputs. A resistor can be
used as the load for the regulator. Ensure that the resistor has
a power rating adequate to 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.
VOLTAGE
SOURCE
+
–
VOLTMETER
1.99711
–
10895-013
+
Figure 13. Output Voltage Measurement
Rev. 0 | Page 8 of 16
Evaluation Board User Guide
UG-439
MEASURING GROUND CURRENT
Ensure that the resistor has a power rating that is adequate to
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.
Figure 14 shows the evaluation board connected to a voltage
source and an ammeter for ground current measurements.
A resistor can be used as the load for the regulator.
VOLTAGE
SOURCE
AMMETER
0.00112
–
+
–
10895-014
+
Figure 14. Ground Current Measurement
Rev. 0 | Page 9 of 16
TSW-101-14-T-D
VOUT2
1
2
1
2
3
1
2
3
VIN
GND
VIN
GND
VIN
JEN2
VIN1
1
2
3
VIN4
GND
Rev. 0 | Page 10 of 16
FBK2
GND
VOUT2
GND
VIN
GND
FB4
VOUT4
1
VOUT4
1
MOLEX22-28-4033
MOLEX22-28-4033
MOLEX22-28-4033
JEN4
JEN3
TSW-101-14-T-D
1
2
JVIN4
108-0740-001
JV4V2
GND
1
VOUT2
ALIAS
EN4
Figure 15. Evaluation Board Schematic of the ADP5034 TSSOP
AGND
VOUT2_SENSE
1
VOUT2S
PGND
1 108-0740-001
1
GND3S
ALIAS
1
GND2S
EN2
ALIAS
10UF
COUT2
PGND2
1UH
L2
100K
100K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PAD
VIN3
U1
28
27
26
FB3
25
NC
24
AGND
23
AVIN
22
VIN1
21
SW1
20
PGND1
19
MODE
18
NC
17
EN1
16
FBK1
15
VOUT1
VOUT3
AGND
AVIN
VOUT1_SENSE
100K
RB1
PAD ADP5034AREZ
VOUT2
FBK2
EN2
NC
NC
PGND2
SW2
VIN2
EN4
FB4
NC
VOUT4
VIN4
VOUT2_SENSE
RB2
SW2
VIN2
100K
AGND_SENSE
EN3
1UF
CIN3
CIN4
1UF
1UF
RT2
ALIAS
CIN2
EN3
1
COUT3
ALIAS
VOUT3_SENSE
VOUT3S
1UF
COUT4
ALIAS
100K
CIN2A
4.7UF
AGND_SENSE
1
RT3
10UF
COUT1
PGND1
CIN1
4.7UF
100K
RT1
0.1UF
100K
ALIAS
CIN1A
VOUT4S
VOUT4_SENSE
0.1UF
RT4
EN1
1
VOUT1S
1
VOUT1
MODE
ALIAS
ALIAS
ALIAS
AGND_SENSE
VOUT1_SENSE
1UH
L1
CIN
0.1UF
RB3
100K
ALIAS
AGND_SENSE
FBK1
GND
VOUT1
GND
VIN
VIN
FB3
VIN
VIN
GND
VIN
GND
GND
1
VIN3
1
VOUT3
GND
VOUT3
GND
GND
VOUT1
JVIN3
1
2
JV3V1
1
2
3
1
2
3
MOLEX22-28-4033
JEN1
MOLEX22-28-4033
JMODE
GND1 TSW-101-14-T-D TSW-101-14-T-D
1
1
2
10895-015
RB4
UG-439
Evaluation Board User Guide
EVALUATION BOARD SCHEMATICS AND ARTWORK
UG-439
10895-016
Evaluation Board User Guide
10895-017
Figure 16. Actual Evaluation Board of the ADP5034 TSSOP
Figure 17. Top Layer, Recommended Layout for ADP5034 TSSOP
Rev. 0 | Page 11 of 16
Evaluation Board User Guide
10895-018
UG-439
Figure 18. Bottom Layer, Recommended Layout for ADP5034 TSSOP
Rev. 0 | Page 12 of 16
Evaluation Board User Guide
UG-439
ORDERING INFORMATION
BILL OF MATERIALS
Table 3.
Qty.
1
2
5
2
1
2
2
8
1
Reference Designator
U1
CIN1, CIN2
CIN3, CIN4, COUT3, COUT4
COUT_2, COUT_1
CIN
CIN1A, CIN2A
L1, L2
RT1, RT2, RT3, RT4, RB1, RB2, RB3, RB4
Description
Micro PMU
Capacitor, MLCC, 4.7 µF
Capacitor, MLCC, 1.0 µF
Capacitor, MLCC, 10.0 µF
Capacitor, MLCC, 0.1uF
Capacitor, MLCC, 0.1uF
Inductor, 1.0 µH
Feedback resistors
Subject to change depending on the output voltage chosen.
RELATED LINKS
Resource
ADP5023
ADP5024
ADP5034
ADP5037
UG-271
Description
Dual 3 MHz, 800 mA Buck Regulator with One 300 mA LDO
Dual 3 MHz, 1200 mA Buck Regulators with One 300 mA LDO
Dual 3 MHz, 1200 mA Buck Regulator with Two 300 mA LDOs
Dual 3 MHz, 800 mA Buck Regulators with Two 300 mA LDOs
Evaluation Board User Guide for ADP5034 LFCSP
Rev. 0 | Page 13 of 16
Manufacturer
Analog Devices
Murata
Murata
Murata
Taiyo Yuden
Taiyo Yuden
Murata
Welwyn, VISHAY
Part Number
ADP5034
GRM188R60J475ME19D
GRM155R61A105KE15D
GRM188R60J106ME47D
GMK105BJ104MV-F
LMK063BJ10KPF
LQM2HPN1R0MJ0L
PNM0805E5002BST51,
PCF0805R-280KBT11
UG-439
Evaluation Board User Guide
NOTES
Rev. 0 | Page 14 of 16
Evaluation Board User Guide
UG-439
NOTES
Rev. 0 | Page 15 of 16
UG-439
Evaluation Board User Guide
NOTES
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.
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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
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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
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Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice
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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
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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
submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.
©2012 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
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