EV20045DQ-00A Low Noise, High PSRR, 1A Linear Regulator EV Board DESCRIPTION FEATURES The EV20045DQ-00A evaluation board demonstrates the performance of MP20045, a low noise, low dropout and high PSRR linear regulator. It operates from a 2.5V to 5.5V input voltage and the output voltage can be set externally which ranges from 1.5V to 5V. The EV20045DQ-00A can supply up to 1A of load current, and features current limiting, over temperature protection and power-good status. An internal PMOS pass element is used to allow a low 110uA ground current, marking the MP20045 suitable for battery-power devices. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units VIN 3.5 – 5.5 V Output Voltage VOUT 3 V Load Current IOUT 1 A Input Voltage Up to 1A Output Current Low 140mV Dropout at 1A Adjustable Output 56dB PSRR at 1kHz 13μVRMS Low Noise Output Open Drain Power-Good Status Output Very Fast Transient Responses Current Limit and Thermal Protection APPLICATIONS Notebook Computers Cordless Telephones Cellular Phones Modems Hand-Held Instruments PDA and Palmtop Computers MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV20045DQ-00A EVALUATION BOARD (L x W x H) 2.5” x 2.5” x 0.4” (6.35cm x 6.35cm x 1.1cm) EV20045DQ-00A Rev. 1.0 5/2/2018 Board Number MPS IC Number EV20045DQ-00A MP20045DQ www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 1 EV20045DQ-00A – LOW NOISE, HIGH PSRR, 1A LINE REGULATOR EVALUATION BOARD SCHEMATIC EV20045DQ-00A BILL OF MATERIALS Qty Ref Value 2 C1,C2 2.2uF 1 C3 100pF 2 CIN,COUT NS 2 R1,R2 10kΩ 2 R3,R4 100kΩ 1 U1 EV20045DQ-00A Rev. 1.0 5/2/2018 Description Package Manufacturer 0805 TDK C2012X7R1C225K 0603 TDK C1608COG1H101J Film Res, 1% 0603 Yageo RC0603FR-0710KL Film Res, 5% 0603 QFN8 (3mm*3mm) Any Ceramic Capacitor,X7R,16V Ceramic Capacitor,COG,50V LDO Regulator MPS www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. Part Number MP20045DQ 2 EV20045DQ-00A – LOW NOISE, HIGH PSRR, 1A LINE REGULATOR PRINTED CIRCUIT BOARD LAYOUT Figure 2—Bottom Layer Figure 1—Top Layer Figure 3—Top Silk Layer EV20045DQ-00A Rev. 1.0 5/2/2018 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 3 EV20045DQ-00A – LOW NOISE, HIGH PSRR, 1A LINE REGULATOR QUICK START GUIDE (ADJUSTABLE OUTPUT) The output voltage of this board is set externally which ranges from 1.5V to 5V by operating from +2.5V to +5.5V input as the figure 4. The default output voltage of this board is set to 3.0V. The board layout accommodates most commonly used resistors and capacitors. 1. Attach the positive and negative ends of the load to the VOUT and GND pins, respectively. 2. Attach the Input Voltage (3.5V ≤ VIN ≤ 5.5V) and Input Ground to the VIN and GND pins, respectively. 3. To enable the MP20045 apply a voltage, 1.5V ≤ VEN ≤ 5.5V, to the EN pin. To disable the MP20045 apply a voltage, VEN < 0.4V, to the EN pin. The EN pin can be connected to VIN with a 100kΩ resistor for automatic startup. 4. The Output Voltage VOUT can be changed by varying R2. Calculate the new value by formula: R1 R2 ( VOUT ) 1 VFB Where VFB = 1.5V and R1 = 10kΩ. Example: For VOUT = 3.0V: R2 10kΩ 10kΩ 3.0 ( ) 1 1.5 Therefore, use a 10kΩ standard 1% value. Figure 4—Adjust Version EV20045DQ-00A Rev. 1.0 5/2/2018 Figure 5—Fixed Version www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 4 EV20045DQ-00A – LOW NOISE, HIGH PSRR, 1A LINE REGULATOR QUICK START GUIDE (MODIFICATION FOR FIXED OUTPUT) For modifying the EV20045DQ-00A to accommodate a fixed output voltage version of the MP20045 as the figure 5: 1. Carefully remove the IC(U1) and replace it with the corresponding fixed output version of the MP20045 chip. 2. Remove both R1 and R2. 3. Short R1 while leaving R2 open. 4. Attach the positive and negative ends of the load to the VOUT and GND pins, respectively. 5. Attach the Input Voltage (3.5V ≤ VIN ≤ 5.5V) and Input Ground to the VIN and GND pins, respectively. 6. To enable the MP20045 apply a voltage, 1.5V ≤ VEN ≤ 5.5V, to the EN pin. To disable the MP20045 apply a voltage, VEN < 0.4V, to the EN pin. The EN pin can be connected to VIN with a 100kΩ resistor for automatic startup. Please refer to the datasheet for the detailed information of the different output voltage option of MP20045. NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV20045DQ-00A Rev. 1.0 5/2/2018 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. 5