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FEATURES
Full-featured evaluation board for the ADP5032
Standalone capability
Simple device measurements, including line and load
regulation, demonstrable with
A single voltage supply
A voltage meter
A current meter
Load resistors
Easy access to external components
Cascading options to supply the LDO from either buck
Dedicated enable option for each channel
Mode option to change bucks from PFM to PWM operation
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Evaluation Board for the ADP5032 Micro PMU
DIGITAL PICTURE OF THE EVALUATION BOARD
Evaluation Board User Guide
GENERAL DESCRIPTION
TheADP5032 evaluation board is a two-step-down regulator with a
two-LDO solution that enables evaluation of the ADP5032. The
evaluation board is available in standard voltage options.
The ADP5032 uses a proprietary high speed, current mode,
constant frequency PWM control scheme for excellent stability
and transient response. To ensure the longest battery life in
portable applications, the ADP5032 features a power save mode
(PSM) that reduces the switching frequency under light load
conditions, as well as the option to change the mode to fixed
PWM operation. The 3 MHz switching frequency minimizes
the size of the external components.
The low quiescent current, low dropout voltage, and wide input
voltage range of the ADP5032 LDO extends the battery life of
portable devices.
Full details on the ADP5032 are provided in the ADP5032 data
sheet available from Analog Devices, Inc., which should be
consulted in conjunction with this evaluation board user guide.
Figure 1.
Rev. 0 | Page 1 of 12
UG-157
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Summary of Contents for Analog Devices UG-157
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Page 1: Features
ADP5032 LDO extends the battery life of portable devices. Full details on the ADP5032 are provided in the ADP5032 data sheet available from Analog Devices, Inc., which should be consulted in conjunction with this evaluation board user guide. DIGITAL PICTURE OF THE EVALUATION BOARD Figure 1. -
Page 2: Table Of Contents
UG-157 Evaluation Board User Guide TABLE OF CONTENTS Measuring Output Voltage ...............6 Features ....................1 Measuring Ground Current .............7 General Description ................. 1 Evaluation Board Schematics and Artwork........8 Digital Picture of the Evaluation Board......... 1 ... -
Page 3: Using The Evaluation Board
Evaluation Board User Guide UG-157 USING THE EVALUATION BOARD Connect the input voltage measuring voltmeter positive termi- POWERING UP THE EVALUATION BOARD nal (+) to the evaluation board J1 (VIN_1), and the negative (−) The ADP5032 evaluation board is supplied fully assembled and terminal to the evaluation board J11 (GND1). - Page 4 UG-157 Evaluation Board User Guide 3.325 = 5V = 3.3V 3.320 3.315 3.310 3.305 = 5V 3.300 = 3.3V 3.295 1000 (mA) Figure 2. Buck Load Regulation Figure 4. Buck Efficiency Measuring Line Regulation Measuring Inductor Current Vary the input voltage and examine the change in the output Measure the inductor current by removing one end of the voltage.
- Page 5 Evaluation Board User Guide UG-157 Load Regulation of LDO Dropout Voltage of LDO For load regulation measurements, the regulator output is Dropout voltage is defined as the input-to-output voltage monitored while the load is varied. For good load regulation, differential when the input voltage is set to the nominal output the output must change as little as possible with varying loads.
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Page 6: Measuring Output Voltage
UG-157 Evaluation Board User Guide MEASURING OUTPUT VOLTAGE Figure 7 shows how the evaluation board can be connected to a to handle the power expected to be dissipated across it. An voltage source and a voltmeter for basic output voltage accuracy electronic load can also be used as an alternative. -
Page 7: Measuring Ground Current
Evaluation Board User Guide UG-157 MEASURING GROUND CURRENT Figure 8 shows the evaluation board connected to a voltage expected to be dissipated across it. An electronic load can be used source and an ammeter for ground current measurements. A as an alternative. Ensure that the voltage source used can supply resistor can be used as the load for the regulator. -
Page 8: Evaluation Board Schematics And Artwork
UG-157 Evaluation Board User Guide EVALUATION BOARD SCHEMATICS AND ARTWORK CBMF1606 VIN1 VIN_1 VOUT1 VIN1 4.7µF BUCK1 VOUT1 VIN2 COUT_1 CD402STD 10µF PGND1 CD603STD VIN3 VIN2 PGND VIN4 4.7µF CBMF1606 CD402STD VOUT2 AGND VIN3 BUCK2 VOUT2 COUT_2 10µF MODE 1µF... - Page 9 Evaluation Board User Guide UG-157 Figure 11. Second Layer, Recommended Layout Figure 12. Third Layer, Recommended Layout Rev. 0 | Page 9 of 12...
- Page 10 UG-157 Evaluation Board User Guide Figure 13. Bottom Layer, Recommended Layout Rev. 0 | Page 10 of 12...
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Page 11: Ordering Information
Evaluation Board User Guide UG-157 ORDERING INFORMATION BILL OF MATERIALS Table 1. Qty. Reference Designator Description Manufacturer Part Number ADP5032 micro PMU—4 regulators Analog Devices ADP5032 C5, C6 Capacitor, MLCC, 4.7 μF, 6.3 V, 0402, X5R Panasonic—ECG ECJ-0EB0J475M C7, C4, COUT_3 ,COUT_4 Capacitor, MLCC, 1.0 μF, 6.3 V, 0402, X5R... - Page 12 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.
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