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UG-456 

Evaluation Board User Guide 

 

Rev. 0 | Page 12 of 12 

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. 

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.

 

©2012  Analog Devices, Inc. All rights reserved. Trademarks and  
 registered trademarks are the property of their respective owners. 
  

UG10949-0-11/12(0)  

 

Summary of Contents for ADP2442-EVALZ

Page 1: ...valuation board is a complete dc to dc switching regulator design based on the ADP2442 a configurable 1 A synchronous step down dc to dc regulator The ADP2442 is a synchronous step down dc to dc switching regulator that uses a current mode pulse width modulation PWM control scheme The ADP2442 can be configured for pulse skip mode at light load or forced PWM mode The power switch and synchronous re...

Page 2: ...e Evaluation Board 3 Powering Up the Evaluation Board 3 Measuring Evaluation Board Performance 4 Modifying the Evaluation Board 5 Changing the Output Voltage 5 Changing the Switching Frequency 5 Typical Performance Characteristics 6 Evaluation Board Schematic and Artwork 8 Ordering Information 10 Bill of Materials 10 REVISION HISTORY 11 12 Revision 0 Initial Version ...

Page 3: ...ore powering the ADP2442 EVALZ evaluation board Before connecting a load to the output of the evaluation board ensure that the output voltage does not exceed the maximum operating voltage range of the load Enabling and Disabling the DC to DC Switching Regulator In the evaluation board a voltage divider is used to generate an enable signal for the IC As soon as voltage is applied to VIN 24 V IC is ...

Page 4: ...in the output voltage In PWM mode ensure that the output voltage ripple is small 50 mV however in pulse skip mode the output voltage ripple can be as large as 100 mV Measuring Efficiency The efficiency η is measured by comparing the input power with the output power IN IN OUT OUT I V I V η Measure the input and output voltages as close as possible to the input and output capacitors to reduce the e...

Page 5: ...etermined calculate the value of the top resistor R2 by FB FB OUT V V V R3 R2 For example to set the output regulation voltage of the ADP2442 EVALZ to 3 3 V calculate the R2 and R3 values as shown in the following equations kΩ 10 μA 60 V 0 6 STRING I FB V R3 Ω Ω k 45 3 0 6V V 0 6 V 3 3 k 10 FB FB OUT V V V R3 R2 When the output voltage of the ADP2442 EVALZ is changed the output capacitors C7 and C...

Page 6: ...A 0 10 20 30 40 50 60 70 80 90 100 0 01 0 1 1 EFFICIENCY LOAD A VIN 12V VIN 24V VIN 36V 10949 005 0 10 20 30 40 50 60 70 80 90 100 0 01 0 1 1 EFFICIENCY VIN 12V VIN 24V VIN 36V 10949 006 LOAD A LOAD A 10949 007 4 980 4 985 4 990 4 995 5 000 5 005 5 010 5 015 5 020 5 025 5 030 5 035 5 040 0 0 2 0 4 0 6 0 8 1 0 1 2 V OUT V VIN 12V VIN 24V VIN 36V 10949 008 4 97 4 98 4 99 5 00 5 01 5 02 5 03 5 04 5 0...

Page 7: ...200µs A CH4 720mA 1 4 2 T 71 2 B W CH4 500mA Ω LOAD STEP 500mA SW SW 10949 011 VOUT CH1 100mV CH4 500mA M200µs A CH4 800mA 1 4 2 T 71 4 B W CH2 5V Ω VOUT LOAD STEP 500mA SW 10949 012 CH2 10V CH3 5V M1ms A CH1 1 32V 1 3 2 T 23 2 B W B W CH1 2V 10949 013 ENABLE CHANNEL 1 VOUT AND CHANNEL 2 SW SW SW ENABLE VOUT CH2 10V CH3 5V M1ms A CH1 1 52V 1 3 2 T 52 4 B W B W CH1 2V 10949 014 SW SW ENABLE VOUT CH...

Page 8: ...UG 456 Evaluation Board User Guide Rev 0 Page 8 of 12 EVALUATION BOARD SCHEMATIC AND ARTWORK Figure 16 ADP2442 EVALZ Evaluation Board Schematic 10949 017 ...

Page 9: ...2 Figure 17 ADP2442 EVALZ Evaluation Board Top Layer Figure 18 ADP2442 EVALZ Evaluation Board Third Layer Figure 19 ADP2442 EVALZ Evaluation Board Second Layer Figure 20 ADP2442 EVALZ Evaluation Board Bottom Layer 10949 018 10949 019 10949 020 10949 021 ...

Page 10: ...LCC 270 pF 50 V 0603 X7R Determine by the user 1 R1 Resistor 49 9 Ω 1 10 W 1 0603 SMD Determined by user 2 R3 R8 Resistor 10 kΩ 1 10 W 1 0603 SMD Determined by user 1 R7 Resistor 50 kΩ 1 10 W 1 0603 SMD Determined by user 1 R2 Resistor 73 2 kΩ 1 10 W 1 0603 SMD Determined by user 1 R5 Resistor 118 kΩ 1 10 W 1 0603 SMD Determined by user 1 R6 Resistor 182 kΩ 1 10 W 11 0603 SMD Determined by user 1 ...

Page 11: ...Evaluation Board User Guide UG 456 Rev 0 Page 11 of 12 NOTES ...

Page 12: ...ny 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 Evaluat...

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