EVAL-ADP7159 User Guide UG-811 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 ADP7159 Ultralow Noise, 2 A, Adjustable Output, RF Linear Regulator FEATURES EVALUATION BOARD LAYOUTS Power supply rejection ratio (PSRR) 68 dB from 1 kHz to 100 kHz; 45 dB at 1 MHz, V OUT = 3.3 V, VIN = 3.8 V Low noise 0.9 µV rms total integrated noise from 100 Hz to 100 kHz 1.6 µV rms total integrated noise from 10 Hz to 100 kHz Noise spectral density: 1.7 nV/√Hz from 10 kHz to 1 MHz Low dropout voltage: 200 mV typical at VOUT = 3.3 V, IOUT = 2 A Maximum output current: 2 A Input voltage range: 2.3 V to 5.5 V Low quiescent and shutdown current Initial accuracy: ±0.6% at ILOAD = 10 mA Accuracy over line, load, and temperature: ±1.5% 10-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages EVALUATION KIT CONTENTS 12953-001 ADP7159CP-04-EVALZ or ADP7159RD-04-EVALZ evaluation board Figure 1. ADP7159CP-04-EVALZ (10-Lead LFCSP) Printed Circuit Board (PCB) Layout ADDITIONAL EQUIPMENT NEEDED A dc power supply Multimeters for voltage and current measurements Electronic or resistive loads GENERAL DESCRIPTION The ADP7159CP-04-EVALZ and ADP7159RD-04-EVALZ evaluation boards demonstrate the operation and functionality of the ADP7159 ultralow noise, 2 A, adjustable output, radio frequency (RF) linear regulator. Simple device measurements such as line and load regulation, dropout voltage, and ground current, can be demonstrated using only a single voltage supply, load resistors, and a voltmeter or an ammeter. 12953-002 Complete specifications for the ADP7159 ultralow noise, 2 A, adjustable output, radio frequency (RF) linear regulator are available in the ADP7159 data sheet available from Analog Devices, Inc., and should be consulted in conjunction with this user guide when using the evaluation boards. Figure 2. ADP7159RD-04-EVALZ (8-Lead SOIC) PCB Layout PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 9 UG-811 EVAL-ADP7159 User Guide TABLE OF CONTENTS Features........................................................................................... 1 Line Regulation Measurements................................................ 6 Evaluation Kit Contents ................................................................ 1 Load Regulation Measurements............................................... 6 Additional Equipment Needed..................................................... 1 Dropout Voltage Measurements............................................... 6 General Description ...................................................................... 1 Ground Current Measurements ............................................... 7 Evaluation Boards.......................................................................... 1 Ground Current Consumption................................................. 8 Revision History ............................................................................ 2 Ordering Information ................................................................... 9 Evaluation Board Hardware.......................................................... 3 Bill of Materials.......................................................................... 9 Evaluation Board Configurations............................................. 3 Output Voltage Measurements ................................................. 5 REVISION HISTORY 3/16—Revision 0: Initial Version Rev. 0 | Page 2 of 9 EVAL-ADP7159 User Guide UG-811 EVALUATION BOARD HARDWARE EVALUATION BOARD CONFIGURATIONS The ADP7159 evaluation boards come supplied with either the ADP7159ACPZ-04-R7 or ADP7159ARDZ-04-R7 linear regulator, depending on the version ordered. The schematics of these evaluation board configurations are shown in Figure 3 and Figure 4, and the components installed in the board are shown in Table 1. Table 1. ADP7159CP-04-EVALZ and ADP7159RD-04EVALZ Hardware Components The ADP7159 is available in four models that optimize power dissipation and PSRR performance as a function of input and output voltage. See Table 2 for selection guides. Component U1 C1 C2 C3 C4 C5 C6, C7 Resistors R1 and R2 set the output voltage. The output voltage (VOUT) is determined by R1, R2 JP1 VOUT = 1.2 V × (1 + R1/R2) Description ADP7159ACPZ-04-R7 or ADP7159ARDZ-04-R7 Input bypass capacitor (CIN ) VREG bypass capacitor (CREG ) VREF bypass capacitor (CREF) Bypass capacitor (CBYP) Output capacitor (COUT) Optional output capacitors (not installed in the evaluation board) Output resistor divider (sets the output voltage) Jumper (connects the EN pin to the VIN pin for automatic startup) Table 2. Model Selection Guide for Input Voltage Model ADP7159-01 ADP7159-02 ADP7159-03 ADP7159-04 Adjustable VOUT Range (V) 1.2 to 1.8 1.2 to 2.3 1.2 to 2.9 1.2 to 3.3 V OUT Range (V) for Optimized PSRR 1.2 to 1.8 1.8 to 2.3 2.3 to 2.9 2.9 to 3.3 Rev. 0 | Page 3 of 9 V REG (V) 2.1 2.6 3.2 3.6 V IN Range (V) 2.3 to 5.5 2.8 to 5.5 3.4 to 5.5 3.8 to 5.5 UG-811 EVAL-ADP7159 User Guide TP1 1 P5 1 2 3 4 5 6 7 8 C1 10µF JP1 1 ADP7159 TP3 1 2 C4 AGND 1µF AGND C2 1µF R1 AGND C3 1µF AGND TP2 U1 P6 1 9 1 VIN VOUT 10 2 VIN VOUT 3 5 EN VOUT_SENSE 4 BYP 8 VREG 7 REF 6 REF_SENSE EP PAD AGND C5 10µF C6 DNI1 C7 DNI1 AGND 1 2 3 4 5 6 7 8 280kΩ R2 160kΩ AGND 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 P4 P3 P2 P1 12953-003 AGND 1DNI = DO NOT INSTALL. DO NOT INSTALL THIS COMPONENT IN THE EVALUATION BOARD. Figure 3. ADP7159CP-04-EVALZ Evaluation Board Schematic (10-Lead LFCSP) TP1 P5 1 1 2 3 4 5 6 7 8 ADP7159 TP3 C1 10µF 1 AGND JP1 8 1 2 4 C4 3 1µF 7 AGND 6 5 C2 1µF R1 AGND VIN TP2 U1 VOUT EN VOUT_SENSE 1 2 P6 1 C5 10µF BYP AGND VREG C6 DNI1 C7 DNI1 1 2 3 4 5 6 7 8 REF REF_SENSE EP PAD C3 280kΩ 1µF AGND AGND R2 160kΩ AGND P1 P3 P2 1 2 3 4 1 2 3 4 P4 1 2 3 4 1 2 3 4 1DNI = DO NOT INSTALL. DO NOT INSTALL THIS COMPONENT IN THE EVALUATION BOARD. Figure 4. ADP7159RD-04-EVALZ Evaluation Board Schematic (8-Lead SOIC) Rev. 0 | Page 4 of 9 12953-104 AGND EVAL-ADP7159 User Guide UG-811 OUTPUT VOLTAGE MEASUREMENTS VOLTMETER VOLTAGE SOURCE 3.29999 + – + – 12953-004 LOAD Figure 5. Output Voltage Measurement Setup, ADP7159CP-04-EVALZ (10-Lead LFCSP) VOLTMETER VOLTAGE SOURCE 3.29999 + + – – 12953-005 LOAD Figure 6. Output Voltage Measurement Setup, ADP7159RD-04-EVALZ (8-Lead SOIC) Figure 5 and Figure 6 show the connections to a voltage source and a voltmeter for basic output voltage accuracy measurements for the ADP7159CP-04-EVALZ and ADP7159RD-04-EVALZ. Use a resistor as the load for the regulator. Ensure the resistor has a power rating that can handle the power dissipated across it. An electronic load can also be used as an alternative to using a resistor load. Ensure that the voltage source supplies enough current for the expected load levels. The steps on how to connect either the ADP7159CP-04-EVALZ or ADP7159RD-04-EVALZ to a voltage source and a voltmeter are as follows: 1. 2. Connect the negative terminal of the voltage source to one of the GND pins on the evaluation board. Connect the positive terminal of the voltage source to the VIN pin on the evaluation board. 3. 4. 5. Connect a load between the evaluation board VOUT pin and one of the GND pins. Connect the negative terminal of the voltmeter to one of the GND pins on the evaluation board. Connect the positive terminal of the voltmeter to the VOUT pin on the evaluation board. When these steps are complete, turn on the voltage source. If the JP1 jumper is inserted (connecting the EN pin to the VIN pin for automatic startup), the regulator powers up. If the load current is large, connect the voltmeter as close as possible to the output capacitor to reduce the effects of voltage drops. Rev. 0 | Page 5 of 9 UG-811 EVAL-ADP7159 User Guide LINE REGULATION MEASUREMENTS 3.35 For line regulation measurements, the change in the output of the regulator is measured when the input is varied. For good line regulation, the output must maintain a minimal change in voltage with respect to varying input voltage levels. To ensure that the device is not in dropout mode during this measurement, vary VIN between VIN_MIN and VIN_MAX . See Table 2 for selection guides. For example, for the ADP7159-04, VIN can vary from 3.8 V to 5.5 V. This measurement can be repeated under different load conditions. The typical line regulation performance of an ADP7159 with a 3.3 V output is shown in Figure 7. 3.34 3.34 3.33 VOUT (V) VOUT (V) 3.30 3.29 3.28 3.27 3.26 3.25 0.1m 1m 10m 100m 1 10 ILOAD (A) = 0mA = 10mA = 100mA = 600mA = 1200mA = 2000mA Figure 8. Output Voltage (VOUT) vs. Load Current (I LOAD), VOUT = 3.3 V, TA = 25°C, CIN = COUT = 10 µF DROPOUT VOLTAGE MEASUREMENTS 3.32 Dropout voltage is defined as the input to output voltage differential when the input voltage is set to the nominal output voltage. This definition is only applicable to output voltages above 2.3 V. Dropout voltage increases with larger loads. Figure 5 and Figure 6 show the configuration for measuring dropout voltage. 3.31 3.30 3.29 3.28 3.27 4.0 4.2 4.4 4.6 4.8 5.0 5.2 VIN (V) 5.4 5.6 12953-008 3.26 3.25 3.8 3.31 12953-007 ILOAD ILOAD ILOAD ILOAD ILOAD ILOAD 3.32 Figure 7. Output Voltage (VOUT) vs. Input Voltage (VIN), VOUT = 3.3 V, TA = 25°C, CIN = COUT = 10 µF For more accurate measurements, use a second voltmeter to monitor the input voltage across the input capacitor. The input supply voltage may require adjusting for voltage drops, especially if using large load currents. The typical curve of dropout voltage measurements over varying load current levels is shown in Figure 9. LOAD REGULATION MEASUREMENTS 0.25 For load regulation measurements, the output voltage of the regulator is monitored while the load current is varied. For a good load regulation, the output must maintain a minimal voltage change with respect to varying load current levels. Hold the input voltage constant during this measurement. The load current can vary from 0 mA to 2 A. The typical load regulation performance of an ADP7159 with a 3.3 V output for an input voltage of 3.8 V is shown in Figure 8. VDROPOUT (V) 0.20 0.15 0.10 0.05 0 10m 100m 1 ILOAD (A) 10 12953-009 3.35 3.33 Figure 9. Dropout Voltage vs. Load Current (I LOAD ), VOUT = 3.3 V, TA = 25°C, CIN = COUT = 10 µF Rev. 0 | Page 6 of 9 EVAL-ADP7159 User Guide UG-811 GROUND CURRENT MEASUREMENTS VOLTAGE SOURCE – + LOAD AMMETER 0.004599 + 12953-010 – Figure 10. Ground Current Measurement Setup, ADP7159CP-04-EVALZ (10-Lead LFCSP) VOLTAGE SOURCE – + LOAD AMMETER 0.004599 + 12953-011 – Figure 11. Ground Current Measurement Setup, ADP7159RD-04-EVALZ (8-Lead SOIC) Figure 10 and Figure 11 show the connections to a voltage source and an ammeter for ground current measurements for the ADP7159CP-04-EVALZ and ADP7159RD-04-EVALZ. Use a resistor as the load for the regulator. Ensure the resistor has a power rating that can handle the power dissipated across it. An electronic load can also be used as an alternative to using a resistor load. Ensure the voltage source supplies enough current for the expected load levels. 3. 4. When these steps are complete, turn on the voltage source. If the JP1 jumper is inserted (connecting the EN pin to the VIN pin for automatic startup), the regulator powers up. The steps on how to connect either of the ADP7159CP-04EVALZ and ADP7159RD-04-EVALZ to a voltage source and an ammeter are as follows: 1. 2. Connect the negative terminal of the ammeter to the negative terminal of the voltage source. Connect a load between the evaluation board VOUT pin and the negative terminal of the voltage source. Connect the positive terminal the voltage source to the VIN pin on the evaluation board. Connect the positive terminal of the ammeter to one of the GND pins on the evaluation board. Rev. 0 | Page 7 of 9 UG-811 EVAL-ADP7159 User Guide GROUND CURRENT CONSUMPTION 14 13 Ground current measurements can determine how much current the internal circuits of the regulator consume while the circuits perform the regulation function. For efficiency, the regulator must consume as little current as possible. Typically, the regulator uses the maximum current when supplying the largest load level (2 A). The typical ground current consumption for various load current levels at VOUT = 3.3 V and TA = 25°C is shown in Figure 12. 12 11 ILOAD = 2000mA 10 IGND (mA) 9 8 7 6 ILOAD = 1200mA ILOAD = 600mA ILOAD = 100mA 5 4 When the device is disabled (EN = GND), the ground current typically drops to 0.2 µA. ILOAD = 10mA ILOAD = 0mA 3 2 0 3.8 4.0 4.2 4.4 4.6 4.8 VIN (V) 5.0 5.2 5.4 5.6 12953-012 1 Figure 12. Ground Current (I GND ) vs. Input Voltage (VIN), VOUT = 3.3 V, TA = 25°C, CIN = COUT = 10 µF Rev. 0 | Page 8 of 9 EVAL-ADP7159 User Guide UG-811 ORDERING INFORMATION BILL OF MATERIALS Table 3. ADP7159CP-04-EVALZ (10-Lead LFCSP) Reference Designator U1 C1, C5, C61, C71 C2, C4 C3 R1, R2 JP1 Description ADP7159, IC, ultralow noise, low dropout, linear regulator Capacitor, MLCC, 10 μF, 10 V, 0805, X5R, 10% Capacitor, MLCC, 1 μF, 10 V, 0805, X5R, 10% Capacitor, MLCC, 1 μF, 10 V, 0603, X5R, 10% Resistor, 1%, 0603 case Jumper, PLUG, 2-position, single row VIN, VOUT, GND Header 0.100, single, straight, two pins 1 Manufacturer Analog Devices, Inc. TDK or equivalent TDK or equivalent TDK or equivalent Vishay Dale Omron Electronics Inc-EMC Div Sullins Electronics/3M Part Number ADP7159ACPZ-04-R7 C2012X5R1A106K125AB C2012X5R1A105K/10 C1608X5R1A105K080AC CRCW0603xxxxF XG8S-0241 Manufacturer Analog Devices, Inc. TDK or equivalent TDK or equivalent TDK or equivalent Vishay Dale Omron Electronics Inc-EMC Div Sullins Electronics/3M Part Number ADP7159ARDZ-04-R7 C2012X5R1A106K125AB C2012X5R1A105K/10 C1608X5R1A105K080AC CRCW0603xxxxF XG8S-0241 S1012E-36-ND Not installed in the evaluation board. Table 4. ADP7159RD-04-EVALZ (8-Lead SOIC) Reference Designator U1 C1, C5, C61, C7 C2, C4 C3 R1, R2 JP1 Description ADP7159, IC, ultralow noise, low dropout, linear regulator Capacitor, MLCC, 10 μF, 10 V, 0805, X5R, 10% Capacitor, MLCC, 1 μF, 10 V, 0805, X5R, 10% Capacitor, MLCC, 1 μF, 10 V, 0603, X5R, 10% Resistor, 1%, 0603 case Jumper, PLUG, 2-position, single row VIN, VOUT, GND Header 0.100, single, straight, two pins 1 S1012E-36-ND Not installed in the evaluation board. 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. 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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. ©2016 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG12953-0-3/16(0) Rev. 0 | Page 9 of 9