ADP7118CP-EVALZ

ADP7118/ADP7142 User Guide UG-616 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 ADP7118/ADP7142 20 V/40 V, 200 mA, Low Noise, CMOS LDOs FEATURES Input voltage range for the ADP7118: 2.7 V to 20 V Input voltage range for the ADP7142: 2.7 V to 40 V Output current range: 0 mA to 200 mA Output voltage accuracy: ±0.8% Operating temperature range: −40°C to +125°C Adjustable option voltage set with two external resistors VOUT = 1.2 V × (1 + R1/R2) GENERAL DESCRIPTION The ADP7118/ADP7142 evaluation boards demonstrate the functionality of the ADP7118/ADP7142 series of linear regulators. For more details on the ADP7118 and ADP7142 linear regulators, refer to the corresponding data sheets. 11813-002 Simple device measurements such as line and load regulation, dropout, and ground current can be demonstrated with just a single voltage source, a voltmeter, an ammeter, and load resistors. Figure 2. ADP7118/ADP7142 TSOT Evaluation Board 11813-001 11813-003 EVALUATION BOARDS Figure 3. ADP7118/ADP7142 SOIC Evaluation Board Figure 1. ADP7118/ADP7142 LFCSP Evaluation Board PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. B | Page 1 of 9 UG-616 ADP7118/ADP7142 User Guide TABLE OF CONTENTS Features .............................................................................................. 1  Line Regulation .............................................................................6  General Description ......................................................................... 1  Load Regulation ............................................................................6  Evaluation Boards............................................................................. 1  Dropout Voltage............................................................................6  Revision History ............................................................................... 2  Ground Current Measurement .......................................................7  Evaluation Board Hardware and Schematic ................................. 3  Ground Current Consumption ...................................................8  Evaluation Board Configurations .............................................. 3  Ordering Information.......................................................................9  Output Voltage Measurements ...................................................... 5  Bill of Materials .............................................................................9  REVISION HISTORY 4/2020—Rev. A to Rev. B Changes to Figure 2.......................................................................... 1 Changes to Figure 5.......................................................................... 3 1/2015—Rev. 0 to Rev. A Changes to Table 3 and Table 4...................................................... 9 10/2014—Revision 0: Initial Version Rev. B | Page 2 of 9 ADP7118/ADP7142 User Guide UG-616 EVALUATION BOARD HARDWARE AND SCHEMATIC All three package options allow the use of the noise reduction network. The LFCSP and the SOIC use C4 and R3, while the TSOT uses C3 and R3. EVALUATION BOARD CONFIGURATIONS The ADP7118/ADP7142 evaluation boards come supplied with different components depending on which package option is ordered. Components common to all package options are C1, C2, R1, R2, R3, JP1, and JP2. Resistor R1 and Resistor R2 are used only for the adjustable output option. The output voltage is set by Figure 4, Figure 5, and Figure 6 show the evaluation board configuration schematics of the LFCSP, the SOIC, and the TSOT, respectively. The ADP7142 can handle up to 40 V of input voltage, whereas the ADP7118 can handle up to 20 V of input voltage. VOUT = 1.2 V × (1 + R1/R2) Note that only the LFCSP and SOIC package options have the soft start capacitor, C3. TP2 J1 1 2 3 4 5 6 7 8 U3 1 VIN C1 TP4 JP1 2 1 1 WAY LINK 2.2µF 6 1 5 4 VIN J2 1nF 1 2 R3 xxkΩ C2 R1 17.4kΩ 2.2µ 2 C4 1 TP3 1 2 3 4 5 6 7 8 VOUT 3 GND ADP7118/ ADP7142 C3 J3 VOUT 2 SS SENSE/ADJ EN 1 1 VOUT JP2 1 WAY LINK 1 xxnF R2 10kΩ CON2 CON8 11813-004 TP1 CON8 NOTES 1. THE VALUES OF R3 AND C4 DEPEND ON THE LOW FREQUENCY ZERO OF THE NOISE REDUCTION NETWORK. SEE DATA SHEET FOR DESIGN DETAILS. Figure 4. LFCSP Evaluation Board Schematic J2 1 U1 2 J1 5 1 1 WAY LINK 1 1 2 3 4 5 6 7 8 JP1 6 VIN 7 C3 C1 2.2µF 8 EN GND SS SENSE/ADJ VIN VOUT VIN VOUT TP2 4 3 J3 1 2 VOUT 1 C2 ADP7118/ ADP7142 10nF 1 2 3 4 5 6 7 8 VOUT 2.2µF R1 17.4kΩ R3 xxkΩ C4 JP2 1 WAY LINK xxnF R2 10kΩ CON8 CON8 NOTES 1. THE VALUES OF R3 AND C4 DEPEND ON THE LOW FREQUENCY ZERO OF THE NOISE REDUCTION NETWORK. SEE DATA SHEET FOR DESIGN DETAILS. Figure 5. SOIC Evaluation Board Schematic J2 1 2 TP2 J1 1 2 3 4 5 6 7 8 U1 1 VIN C1 2.2µF 1 2 JP1 2 1 3 1 WAY LINK VIN J3 1 VOUT GND EN SENSE/ADJ 5 4 VOUT VOUT C2 2.2µF ADP7118/ ADP7142 1 TP3 R1 17.4kΩ C3 xxnF R2 10kΩ CON8 R3 xxkΩ 2 1 JP2 1 WAY LINK 1 2 3 4 5 6 7 8 CON8 NOTES 1. THE VALUES OF R3 AND C3 DEPEND ON THE LOW FREQUENCY ZERO OF THE NOISE REDUCTION NETWORK. SEE DATA SHEET FOR DESIGN DETAILS. Figure 6. TSOT Evaluation Board Schematic Rev. B | Page 3 of 9 11813-006 TP1 CON2 11813-005 TP1 CON2 2 TP3 1 1 2 UG-616 ADP7118/ADP7142 User Guide Table 1. Evaluation Board Hardware Components (LFCSP and SOIC) Component U1, U31 C1 C2 C3 C4 R1 R2 R3 JP1 JP2 1 Function Linear regulator Input capacitor Output capacitor Soft start capacitor Noise reduction capacitor Output divider Output divider Noise reduction resistor Jumper Jumper Description ADP7118/ADP7142 are linear regulators. C1 is a 2.2 μF input bypass capacitor. C2 is a 2.2 μF output capacitor that is required for stability and transient performance. C3 sets the soft start time to limit inrush current. C4 is used with R3 for the noise reduction network. R1 sets the output voltage to 3.3 V with R2 in the adjustable option. R2 = 17.4 kΩ. R2 sets the output voltage to 3.3 V with R1 in the adjustable option. R1 = 10 kΩ. R3 is used with C4 for the noise reduction network. JP1 connects the EN pin to VIN for automatic startup. JP2 connects the SENSE/ADJ pin to output for fixed output options. Component varies depending on the type of evaluation board ordered. Table 2. Evaluation Board Hardware Components (TSOT) Component U11 C1 C2 C3 R1 R2 R3 JP1 JP2 1 Function Linear regulator Input capacitor Output capacitor Noise reduction capacitor Output divider Output divider Noise reduction resistor Jumper Jumper Description ADP7118/ADP7142 are linear regulators. C1 is a 2.2 μF input bypass capacitor. C2 is a 2.2 μF output capacitor that is required for stability and transient performance. C3 is used with R3 for the noise reduction network. R1 sets the output voltage to 3.3 V with R2 in the adjustable option. R2 = 17.4 kΩ. R2 sets the output voltage to 3.3 V with R1 in the adjustable option R1 = 10 kΩ. R3 is used with C3 for the noise reduction network. JP1 connects the EN pin to VIN for automatic startup. JP2 connects the SENSE/ADJ pin to output for fixed output options. Component varies depending on the type of evaluation board ordered. Rev. B | Page 4 of 9 ADP7118/ADP7142 User Guide UG-616 OUTPUT VOLTAGE MEASUREMENTS VOLTMETER VOLTAGE SOURCE – 1.99711 – + + 11813-007 LOAD Figure 7. Output Voltage Measurement, LFCSP VOLTMETER VOLTAGE SOURCE – 1.99711 – + + 11813-008 LOAD Figure 8. Output Voltage Measurement, SOIC VOLTMETER VOLTAGE SOURCE – 1.99711 – + + 11813-009 LOAD Figure 9. Output Voltage Measurement, TSOT Figure 7, Figure 8, and Figure 9 show how the different evaluation boards can be connected to a voltage source and a voltmeter for basic output voltage accuracy measurements. A resistor can be used as the load for the regulator. Ensure that the resistor has a power rating that can adequately 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. Rev. B | Page 5 of 9 UG-616 ADP7118/ADP7142 User Guide Use the following steps to connect the evaluation boards to a voltage source and voltmeter: 4. 5. The voltage source can now be turned on. If J1 is inserted (connecting the EN pin to VIN for automatic startup), the regulator powers up. If the load current is large, the user must connect the voltmeter as close as possible to the output capacitor to reduce the effects of IR drops. 3.35 3.33 3.31 3.29 3.27 LINE REGULATION For line regulation measurements, the output of the regulator is monitored while the input of the regulator is varied. For good line regulation, the output must change as little as possible with varying input levels. To ensure that the device is not in dropout during this measurement, VIN must be varied between VOUTNOM + 1 V (or 2.7 V, whichever is greater) and VINMAX. For example, for an ADP7142 with a 3.3 V output, VIN must vary between 4.3 V and 40 V (20 V for the ADP7118). This measurement can be repeated under different load conditions. Figure 10 shows the typical line regulation performance of an ADP7142 with a 3.3 V output. 3.35 LOAD = 100µA LOAD = 1mA LOAD = 10mA LOAD = 50mA LOAD = 100mA LOAD = 200mA 3.31 1 10 100 1000 ILOAD (mA) Figure 11. Output Voltage (VOUT) vs. Load Current (ILOAD) DROPOUT VOLTAGE Dropout voltage can be measured using the configuration shown in Figure 7. Dropout voltage is defined as the input to output voltage differential when the input voltage is set to the nominal output voltage. Dropout voltage applies only for output voltages greater than 2.8 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. Figure 12 shows a typical curve of dropout voltage measurements with different load currents. 3.4 3.29 3.3 3.27 3.25 0 5 10 15 20 25 30 35 VIN (V) 40 VOUT (V) 3.2 11813-010 VOUT (V) 3.33 3.25 0.1 11813-011 3. For load regulation measurements, the output of the regulator 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 200 mA. Figure 11 shows the typical load regulation performance of an ADP7142 with a 3.3 V output for an input voltage of 4.3 V. 3.1 3.0 LOAD = 5mA LOAD = 10mA LOAD = 50mA LOAD = 100mA LOAD = 150mA LOAD = 200mA Figure 10. Output Voltage (VOUT) vs. Input Voltage (VIN) 2.9 2.8 3.1 3.3 3.5 3.7 3.9 VIN (V) Figure 12. Output Voltage (VOUT) in Dropout vs. Load Current (ILOAD) Rev. B | Page 6 of 9 11813-012 2. Connect the negative terminal (−) of the voltage source to one of the GND pads on the evaluation board. Connect the positive terminal (+) of the voltage source to the VIN pad on the evaluation board. Connect a load between the VOUT pad and one of the GND pads. Connect the negative terminal (−) of the voltmeter to one of the GND pads. Connect the positive terminal (+) on the voltmeter to the VOUT pad. VOUT (V) 1. LOAD REGULATION ADP7118/ADP7142 User Guide UG-616 GROUND CURRENT MEASUREMENT VOLTAGE SOURCE – + AMMETER 0.00112 – + 11813-013 LOAD Figure 13. Ground Current Measurement, LFCSP VOLTAGE SOURCE - + AMMETER LOAD 11813-014 0.00112 + Figure 14. Ground Current Measurement, SOIC VOLTAGE SOURCE - + AMMETER 0.00112 + 11813-015 LOAD Figure 15. Ground Current Measurement, TSOT Rev. B | Page 7 of 9 UG-616 ADP7118/ADP7142 User Guide Figure 13, Figure 14, and Figure 15 show how the evaluation boards can be connected to a voltage source and an ammeter for ground current measurements. A resistor can be used as the load for the regulator. Ensure that the resistor has a power rating that can adequately 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. Use the following steps to connect the evaluation boards to a voltage source and an ammeter: 3. 4. 800 Connect the positive terminal (+) of the voltage source to the VIN pad on the evaluation board. Connect the positive terminal (+) of the ammeter to one of the GND pads of the evaluation board. Connect the negative terminal (−) of the ammeter to the negative (−) terminal of the voltage source. Connect a load between the negative (−) terminal of the voltage source and the VOUT pad of the evaluation board. 700 The voltage source can now be turned on. If J1 is inserted (connecting the EN pin to VIN for automatic startup), the regulator powers up. 600 500 400 300 200 100 0 0.1 1 10 ILOAD (mA) 100 1k 11813-016 2. Ground current measurements can determine how much current the internal circuits of the regulator are consuming while the circuits perform the regulation function. To be efficient, the regulator needs to consume as little current as possible. The regulator typically uses the maximum current when supplying its largest load level (200 mA). Figure 16 shows the typical ground current consumption vs. load current at an input voltage of 6 V for an output voltage of 3.3 V. GROUND CURRENT (µA) 1. GROUND CURRENT CONSUMPTION Figure 16. Ground Current vs. Load Current (ILOAD) When the device is disabled (EN = GND), the ground current drops to less than 1 μA. Rev. B | Page 8 of 9 ADP7118/ADP7142 User Guide UG-616 ORDERING INFORMATION BILL OF MATERIALS Table 3. SOIC and LFCSP Bill of Materials Quantity 1 Reference Designator U1, U31 Description ADP7118 or ADP7142 Manufacturer/Vendor Analog Devices, Inc. 2 1 1 2 1 1 1 C1, C2 C3 (not installed) C4 (not installed) JP1, JP2 R1 R2 R3 (not installed) Capacitors, MLCC, 2.2 μF, 100 V, 1210, X7R Capacitor, MLCC, 0805 case Capacitor, MLCC, 0805 case Header, single, 2 pins Resistor, 1%, 0805 case, 17.4 kΩ Resistor, 1%, 0805 case, 10 kΩ Resistor, 1%, 0805 case Murata (or equivalent) Not applicable Not applicable Sullins Connector Solutions Vishay Dale or equivalent Vishay Dale or equivalent Not applicable 1 Vendor Part Number ADP7118CP, ADP7142CP, ADP7118RD, or ADP7142RD GRM32ER72A225KA35 Not applicable Not applicable PEC02SAAN CRCW080517K4FKEA CRCW080510K0FKEA Not applicable Component varies depending on the type of evaluation board ordered. Table 4. TSOT Bill of Materials Quantity 1 2 1 2 1 1 1 1 Reference Designator U11 C1, C2 C3 (not installed) JP1, JP2 R1 R2 R3 (not installed) Description ADP7118 or ADP7142 Capacitors, MLCC, 2.2 μF, 100 V, 1210, X7R Capacitor, MLCC, 0805 case Header, single, 2 pins Resistor, 1%, 0805 case, 17.4 kΩ Resistor, 1%, 0805 case, 10 kΩ Resistor, 1%, 0805 case Manufacturer/Vendor Analog Devices, Inc. Murata (or equivalent) Not applicable Sullins Connector Solutions Vishay Dale or equivalent Vishay Dale or equivalent Not applicable Vendor Part Number ADP7118UJ or ADP7142UJ GRM32ER72A225KA35 Not applicable PEC02SAAN CRCW080517K4FKEA CRCW080510K0FKEA Not applicable Component varies depending on the type of evaluation board ordered. 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. 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