PDF User Guides

EVAL-ADP5090 User Guide
UG-708
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 ADP5090 Ultralow Power Boost Regulator
GENERAL DESCRIPTION
The ADP5090 is an ultralow, power synchronous, dc-to-dc
boost regulator in a compact 3 mm × 3 mm LFCSP_WQ
package. The ADP5090 runs from input voltages of 0.38 V to
3.3 V and requires minimal external components to provide a
high efficiency solution with an integrated power switch, a
synchronous rectifier, and battery management.
The EVAL-ADP5090 evaluation board provides an easy way to
evaluate the device. This user guide describes how to quickly set
up the board and deliver up to 3.5 V maximum voltage to the
SYS output using an external resistor divide. The internal
switches turn on if the storage element voltage at the BAT pin is
above the externally programmed SETSD voltage of 2.4 V. The
PGOOD indicator toggles high when the SYS pin ramps up to 3 V.
Complete information about the ADP5090 is available in the
corresponding data sheet. Consult the data sheet in conjunction
with this user guide when using the evaluation board.
12384-001
THE EVAL-ADP5090 EVALUATION BOARD
Figure 1. Photograph of the EVAL-ADP5090 Evaluation Board
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 8
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EVAL-ADP5090 User Guide
TABLE OF CONTENTS
General Description ......................................................................... 1 Measuring the EVAL-ADP5090 Performance ..........................4 The EVAL-ADP5090 Evaluation Board ........................................ 1 Evaluation Board Schematics...........................................................6 Revision History ............................................................................... 2 Evaluation Board Layout ..................................................................7 Setting Up the Evaluation Board .................................................... 3 Ordering Information .......................................................................8 Powering Up the Evaluation Board ............................................ 3 Bill of Materials ..............................................................................8 REVISION HISTORY
9/14—Revision 0: Initial Version
Rev. 0 | Page 2 of 8
EVAL-ADP5090 User Guide
UG-708
SETTING UP THE EVALUATION BOARD
POWERING UP THE EVALUATION BOARD
Output Load Connection
The ADP5090 evaluation board is fully assembled and tested.
Use the following setup procedures before applying power to
the evaluation board,
Table 1 describes the jumper settings.
Before connecting the load to the EVAL-ADP5090 evaluation
board, ensure that the SYS voltage is higher than the end of the
cold-startup threshold (VSYS_TH, 1.93 V typical), or that the
PGOOD signal is high. If the load includes a current meter or if
the current is not measured, connect the load directly to the
evaluation board as follows:
Table 1. Jumper Settings
1.
Jumper Settings
Jumper
J1 (DIS_SW)
J2 (PGOOD)
J3 (RDIV)
State or
Connection
SYS
GND
Not
applicable
MPPT
Floating
Function
Disables the main boost
Enables the main boost
Pull high when the SYS voltage
ramps up to preset the SETPG
rising threshold
With MPPT sensing function
Without MPPT sensing function;
provide an external voltage at
the CBP pin as the MPPT voltage
2.
If a current meter is used, connect it in series with the load as
follows:
1.
2.
3.
Input Power Source Connection
Energy harvesting power sources are high impedance sources.
As Figure 2 shows, a source meter configured as a current
source with a voltage limit set to the open circuit voltage of the
harvester is the best way to simulate the harvester. For a low
output impedance power supply (voltage source), it is necessary
to simulate the impedance of the harvester with a physical
resistor, R, between the supply and the VIN pin. If the input
current source includes a voltage meter, use the meter to
monitor the input voltage as follows:
2.
Connect the positive terminal (+) of the current meter to
the SYS terminal (J4) on the evaluation board.
Connect the negative terminal (−) of the current meter to
the positive terminal (+) of the load.
Connect the negative terminal (−) of the load to the GND
terminal (J4) on the evaluation board.
Storage Elements Connection
The EVAL-ADP5090 can charge some types of energy storage
elements, such as rechargeable batteries, super capacitors, and
conventional capacitors. In general, the storage elements
maintain constant power or peak power of the system that
cannot directly come from the input source. It is necessary to
consider any significant leakage current of batteries and super
capacitors. For applications information, refer to the ADP5090
data sheet.
Connect the positive terminal of the power source to the
VIN terminal (J6) on the evaluation board.
Connect the negative terminal of the power source to the
GND terminal (J6) on the evaluation board.
SUPER CAPACITOR
OR RECHARGEABLE
BATTERY
If the input power supply does not include a current meter, connect
a current meter in series with the input power supply as follows:
1.
2.
3.
Connect the external series resistor of the power source to
the positive terminal (+) of the current meter.
Connect the negative terminal of the power source to the
GND terminal (J6) on the evaluation board.
Connect the negative terminal (−) of the current meter to
the VIN terminal (J6) on the evaluation board.
R
–
+
CURRENT SOURCE
WITH VOLTAGE LIMIT
–
+
VOLTAGE SOURCE
Figure 2. Setup for the EVAL-ADP5090 Evaluation Board
Rev. 0 | Page 3 of 8
12384-002
1.
Connect the positive load connection (+) to the SYS
terminal (J4) on the evaluation board.
Connect the negative load connection (−) to the GND
terminal (J4) on the evaluation board.
UG-708
EVAL-ADP5090 User Guide
Input and Output Voltmeter Connections
MEASURING THE EVAL-ADP5090 PERFORMANCE
Measure the input and output voltages with voltmeters. Ensure
that the voltmeters connect to the appropriate test points on the
board. If the voltmeters are not connected to the correct test
points, the measured voltages may be incorrect due to the voltage
drop across the leads, or due to the connections between the
board, the power source, and/or the load. To connect the
voltmeters, use the following procedure:
Measuring the Switching Waveform
1.
Measuring Efficiency
2.
3.
4.
Connect the positive terminal (+) of the input voltage
measuring voltmeter to Test Point TP5 on the evaluation
board.
Connect the negative terminal (−) of the input voltage
measuring voltmeter to Test Point TP6 on the board.
Connect the positive terminal (+) of the output voltage
measuring voltmeter to Test Point TP2 on the board.
Connect the negative terminal (−) of the output voltage
measuring voltmeter to Test Point TP9 on the board.
To observe the switching waveform with an oscilloscope, place
the oscilloscope probe tip at Test Point TP4 with the probe
ground connected to the GND pin. Set the oscilloscope to a dc
coupling, 2 V/division, 10 μsec/division time base. The
switching waveform alternates between 0 V and the
approximate SYS voltage.
Measure the efficiency, η, by comparing the input power with
the output power. Figure 3 shows the test setup. Float the RDIV
jumper (J3) and provide an external voltage at the CBP pin as
the MPPT voltage so that the input voltage is regulated to this
voltage. With a voltage source meter capable of sinking current
to connect to the SYS pin, obtain the output voltage and output
current.
η
Powering On the Evaluation Board
If the open circuit voltage (OCV) of the input current source is
above a minimum input voltage of 0.38 V for cold-start
(typical), and the input power is above the 16 μW minimum
input power of cold-start (typical), the EVAL-ADP5090 enters
cold-startup when the SYS voltage is below VSYS_TH. When the
SYS voltage is above VSYS_TH, the board exits cold-startup and
enables the main boost.
After cold-startup, the MPPT sampling circuit is active and the
harvester OCV is detectable because there is no input current to
create a droop across the impedance. The main boost runs and
draws current until the VIN voltage drops to the sampled
MPPT voltage stored at the CBP pin.
Optional BACK_UP Setup
An optional primary battery connected to the BACK_UP pin
can accelerate the cold-startup or maintain the system load.
When the voltage at the BACK_UP pin is higher than the
voltage at the BAT pin, the ADP5090 turns on the internal
power MOSFETs between the BACK_UP pin and the SYS pin.
When the BACK_UP pin voltage is lower than the BAT pin
voltage, the internal power MOSFETs turn off.
VSYS  I SYS
VIN  I IN
Measuring the Inductor Current
Measure the inductor current by removing one end of the
inductor from the pad on the board and using a wire connected
between the pad and the inductor. Then, use a current probe to
measure the inductor current.
Measuring the Output Voltage Ripple
To observe the output voltage ripple, place an oscilloscope
probe across Output Capacitor C1 with the probe ground lead
placed at the negative capacitor terminal (−) and the probe tip
placed at the positive capacitor terminal (+). Set the oscilloscope to an ac coupling, 50 mV/division, 1 sec/division time
base and a 20 MHz bandwidth.
A standard oscilloscope probe has a long wire ground clip. For
high frequency measurements, this ground clip picks up high
frequency noise and injects it into the measured output ripple.
To eliminate the noise injection, remove the oscilloscope probe
sheath and wrap a nonshielded wire around the oscilloscope
probe. By keeping the ground lengths of the oscilloscope probe
as short as possible, the true ripple can be measured.
Rev. 0 | Page 4 of 8
EVAL-ADP5090 User Guide
UG-708
Output Voltage Change
To prevent deeply discharging storage elements at the BAT pin,
the voltage threshold can be programmed using the following
equation:
The output voltage of the EVAL-ADP5090 is preset to 3.5 V.
However, the output voltage can be adjusted using the following
equation:
3
R3 
VREF  1 

2
R6 

where VREF, the typical internal reference voltage, is 1.21 V.
VOLTAGE
SOURCE METER
(CURRENT SINK)
INPUT VOLTAGE
REGULATION
REFERENCE
(MPPT RATIO x
OCV)
–
+
CURRENT SOURCE
WITH VOLTAGE LIMIT
Figure 3. Test Setup for Measuring the Efficiency of the EVAL-ADP5090
Rev. 0 | Page 5 of 8
12384-003
VSYS 
R2 
VSETSD  VREF 1 

R5 

UG-708
EVAL-ADP5090 User Guide
EVALUATION BOARD SCHEMATICS
J1
1
2
3
J2
1
2
TP1
BACK_UP
1
10
1
9
L1
2
C3
22µH
PGND
SY S
J5
2
1
1
TP4
SW
BAT
TP5
VIN
J6
1
2
1
C4
10nF
J7
R8
4.7MΩ
R9
18MΩ
TP6
C5
C6
4.7µF/ 10V
3
2
1
0.1µF
MPPT
RDIV
CBP
VIN
TP8
1
1
GND
GND
GND
TP9
1
TP10
1
TP11
1
GND
GND
GND
Figure 4. Schematic of the EVAL-ADP5090
Rev. 0 | Page 6 of 8
TP7
1
12384-004
5
VIN
SW
TP3
BAT
1
PGOOD
13
14
DIS_SW
15
REF
BAT
MINOP
BACK_UP
J4
2
1
100µF/ 6.3V
R7
NC
AGND
12
11
C2
8
4
7
R6
5.11MΩ
SY S
CBP
R5
4.99MΩ
BACK_UP
TERM
MPPT
R4
4.02MΩ
3
SETSD
6
2
C1
0.1µF
1
TP2
SY S
U1
ADP5090
4.7µF/ 10V
SETPG
17
R3
4.87MΩ
16
R2
4.99MΩ
EXP
R1
6.04MΩ
J3
2
1
1
PGOOD
SY S
DIS_SW
GND
EVAL-ADP5090 User Guide
UG-708
EVALUATION BOARD LAYOUT
12384-005
Figure 5 and Figure 6 show the top and bottom layers of the EVAL-ADP5090.
12384-006
Figure 5. EVAL-ADP5090, Top Layer
Figure 6. EVAL-ADP5090, Bottom Layer
Rev. 0 | Page 7 of 8
UG-708
EVAL-ADP5090 User Guide
ORDERING INFORMATION
BILL OF MATERIALS
Table 2. The ADP5090 Evaluation Board Bill of Materials
Quantity
2
2
1
1
1
1
1
1
1
1
1
1
Reference Designator
C1, C6
C2, C5
C3
C4
J1
J2
J3
J4
J5
J6
J7
L1
1
2
1
1
1
1
1
1
1
1
1
1
1
6
1
R1
R2, R5
R3
R4
R6
R7
R8
R9
TP1
TP2
TP3
TP4
TP5
TP6, TP7, TP8, TP9, TP10, TP11
U1
Description
Capacitor, 4.7 μF, 10 V
Capacitor, 0.1 μF
Capacitor, 100 μF, 6.3 V
Capacitor, 10 nF
DIS_SW
PGOOD
BACK_UP
SYS
BAT
VIN
RDIV
Inductor, 22 μH
Inductor, 22 μH
Resistor, 6.04 MΩ
Resistor, 4.99 MΩ
Resistor, 4.87 MΩ
Resistor, 4.02 MΩ
Resistor, 5.11 MΩ
Resistor, 20k
Resistor, 4.7 MΩ
Resistor, 18 MΩ
BACK_UP
SYS
BAT
SW
VIN
GND
IC
Part Number
GRM21BR61A475KA73
GRM188R71H104KA93
C4532X5R0J107M280KA
GRM188R71H103KA01
M20-9990246
M20-9990245
M20-9990246
LPS4018-223MLB
74437324220
CRCW06036M04FKTA
CRCW06034M99FKEA
CRCW06034M87FKEA
CRCW06034M02FKEA
CRCW06035M11FKEA
CRCW060320K0FKEA
CRCW06034M70FKEA
RK73B1JTTD186J
M20-9990245
M20-9990245
M20-9990245
M20-9990245
M20-9990245
M20-9990245
ADP5090ACPZ-1-R7
PCB Footprint
C0805
C0603
C1812
C0603
SIP3
SIP2
SIP2_big
SIP2_big
SIP2_big
SIP2_big
SIP3
Inductor_4x4
Inductor_4x4
R0603
R0603
R0603
R0603
R0603
R0603
R0603
R0603
SIP1
SIP1
SIP1
SIP1
SIP1
SIP1
LFCSP16-3x3PL
Vendor
Murata
Murata
TDK
Murata
Harwin
Harwin
Harwin
Harwin
Harwin
Harwin
Harwin
Coilcraft
Wurth
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
Vishay Dale
KOA
Harwin
Harwin
Harwin
Harwin
Harwin
Harwin
Analog Devices
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. TERMINATION. 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 construed 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
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.
©2014 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
UG12384-0-9/14(0)
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