EV8904DD-00A 500mA Low-Current LDO Linear Regulator EV Board The Future of Analog IC Technology DESCRIPTION FEATURES The EV8904DD-00A evaluation board demonstrates the performance of MP8904, a monolithic low-current, low-dropout LDO linear regulator. It operates from a 2.5V to 6.5V input bias voltage and regulates the output voltage from as low as 0.5V. It requires a bias supply (2.5V to 6.5V) separate from VIN to run the internal reference and LDO drive circuitry. The output current comes directly from the input voltage supply for high efficiency regulation. The 0.5V internal reference voltage allows the output to be programmed to a range of 0.5V to 5V. The EV8904DD-00A provides thermal overload and current limit protection. The MP8904 is available in an 8-pin QFN (2mm x 3mm) package. • • • • • • • • • • ELECTRICAL SPECIFICATIONS Parameter Input Voltage Dropout Voltage Output Current Symbol VIN VDROPOUT IOUT Value 2.5 – 6.5 300 0.5 Units V mV A Wide 2.5V to 6.5V Input Voltage Range Stable with Very Small Ceramic Capacitors 300mV Dropout at 500mA Output 2% Feedback Accuracy Adjustable Output Range from 0.5V to 5V Stable With Low-ESR Output Capacitors Low 100μA Ground Current Internal Thermal Protection Current Limit Protection Fully Assembled and Tested APPLICATIONS • • • Low Current Regulators Battery-Powered Systems Mobile Devices, such as Cell Phones and GPS Navigators All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV8904DD-00A EVALUATION BOARD 0.40 0.35 0.30 0.25 0.20 0.15 0.10 100 Board Number EV8904DD-00A EV8904DD-00A Rev. 1.1 5/18/2015 200 300 400 500 MPS IC Number MP8904 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 1 EV8904DD-00A – LOW VOLTAGE, 500mA LINEAR REGULATOR EV BOARD EVALUATION BOARD SCHEMATIC EV8904DD-00A BILL OF MATERIALS Qty Ref Value 1 C1 2.2µF 1 C2 4.7µF 1 C3 1nF 1 2 1 1 R1 R2, R3 R4 U1 26.1kΩ 10kΩ 100kΩ MP8904 EV8904DD-00A Rev. 1.1 5/18/2015 Description Ceramic Cap., X7R, 16V Ceramic Cap., X7R, 16V Ceramic Cap. 25V X7R Film Res., 1% Film Res., 1% Film Res., 1% Linear Regulator Package Manufacturer Manufacturer P/N 1206 TDK C3216X7R1C225K 1206 TDK C3216X7R1C475K 0603 muRata 0603 0603 0603 QFN-8 Panasonic Panasonic ROYAL MPS GRM188R71E102KA01D ERJ-3EKF2612V ERJ-3EKF1002V RL0603FR-07100KL MP8904DD www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 2 EV8904DD-00A – LOW VOLTAGE, 500mA LINEAR REGULATOR EV BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Bottom Layer EV8904DD-00A Rev. 1.1 5/18/2015 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 3 EV8904DD-00A – LOW VOLTAGE, 500mA LINEAR REGULATOR EV BOARD QUICK START GUIDE The output voltage of this board is set to 1.8V. 1. Connect the positive and negative terminals of the load to the VOUT and GND pins respectively. 2. Preset the power supply output between 2.5V and 6.5V, and then turn off the power supply. 3. Connect the positive and negative terminals of the power supply output to the VIN and GND pins, respectively. 4. Turn the power supply on. The board will automatically start up. 5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.2V to turn on the regulator or less than 0.4V to turn it off. 6. The default resistor values on the board are R1=26.1kΩ and R2=10kΩ. Changing these resistor values will change the output voltage. Use the following equation to determine resistor values for different output voltages: VOUT = 0.5Vx(1 + R1 ) R2 NOTICE: The information in this document is subject to change without notice. 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. EV8904DD-00A Rev. 1.1 5/18/2015 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 4