EV2005DD-00A 800mA Low-Current LDO Linear Regulator EV Board The Future of Analog IC Technology DESCRIPTION FEATURES The EV2005DD-00A evaluation board demonstrates the performance of MP2005, a monolithic low-current, low-dropout LDO linear regulator. It operates from a 2.5V to 5V input bias voltage and regulates the output voltage from as low as 0.5V. The EVB can supply up to 800mA of load current with a typical dropout voltage of 75mV. It requires a bias supply (2.5V to 5.5V) 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 EV2005DD-00A provides thermal overload and current limit protection, stability with ultra low ESR ceramic capacitors as low as 1uF, and fast transient response. The MP2005 is available in a 8-pin QFN (2mm x 3mm) package and is also available in fixed output voltage versions. • • • • • • • • • • • • ELECTRICAL SPECIFICATIONS Parameter Input Voltage Dropout Voltage Output Current Symbol VIN VDROPOUT IOUT Value 1.0 – 5 75 0.5 Units V mV A Wide 1.0V to 5V Input Voltage Range Stable with Very Small Ceramic Capacitors 75mV Dropout at 800mA Output 2% Accurate Output Voltage Adjustable Output Range from 0.5V to 5V Low Noise: 80µVRMS (10Hz to 100KHz) High PSRR: 40dB at 1MHz Stable With Low-ESR Output Capacitors Low 100μA Ground Current Internal Thermal Protection Current Limit Protection Fully Assembled and Tested APPLICATIONS • • • • • • • Low Current Regulators Low Power Handheld Devices Battery Powered Systems Cellular Phones Portable Electronic Equipment Post Regulation for Switching Power Supplies Power Supplies “MPS” and “The Future of Analog IC Technology”, are Registered Trademarks of Monolithic Power Systems, Inc. EV2005DD-00A EVALUATION BOARD 120 L x W x H) 2.9” x 2.9” x 0.5” (7.5cm x 7.5cm x 1.2cm) Board Number EV2005DD-00A EV2005DD-00A Rev. 1.1 6/26/2009 MPS IC Number MP2005 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 1 EV2005DD-00A – LOW VOLTAGE, 800MA LINEAR REGULATOR EV BOARD EVALUATION BOARD SCHEMATIC 2V-5V 1 VIN VIN VOUT 1.8V/0.5A 8 VOUT MP2005 BIAS 3.5V-5.5V 2 5 EN BIAS EN C3 NS GND FB GND JP2 7 4 GND JP1 EV2005DD-00A BILL OF MATERIALS Qty Ref Value 2 C1, C4 2.2µF 1 C2 4.7µF 1 1 1 1 1 C3 R1 R2 JP JP NS 26.1kΩ 10kΩ 1 U1 EV2005DD-00A Rev. 1.1 6/26/2009 Description Package Ceramic Cap., 1206 X7R, 16V Ceramic Cap., 1206 X7R, 16V Not Stuffed Film Res., 1% 603 Film Res., 1% 603 10-Pin Header, 0.1" 5-Pin Header, 0.1" Linear QFN-8 Regulator Manufacturer Manufacturer P/N TDK C3216X7R1C225K TDK C3216X7R1C475K Panasonic Panasonic Sullins Sullins ERJ-3EKF2612V ERJ-3EKF1002V PTC08SAAN PTC08SAAN MPS MP2005DD www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 2 EV2005DD-00A – LOW VOLTAGE, 800MA LINEAR REGULATOR EV BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Bottom Layer EV2005DD-00A Rev. 1.1 6/26/2009 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 3 EV2005DD-00A – LOW VOLTAGE, 800MA LINEAR REGULATOR EV BOARD QUICK START GUIDE The output voltage of this board is set to 1.8V. The EN pin is connected to BIAS with a jumper for automatic startup. You can connect EN to GND to disable the MP2005 1. Attach the positive and negative ends of the load to the VOUT and GND pins, respectively. 2. Attach the input voltage (2V ≤ VIN ≤ 5V) and input ground to the VIN and GND pins, respectively. 3. Attach the BIAS voltage (3.5V ≤ VBIAS ≤ 5.5V) and BIAS ground to the BIAS and GND pins, respectively. 4. The VIN voltage and BIAS voltage can be set up to same voltage but it has to meet : VIN=VBIAS>(1.8V + VOUT )and VBIAS>2.7V 5. 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. EV2005DD-00A Rev. 1.1 6/26/2009 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2009 MPS. All Rights Reserved. 4