EV2005DD-00A 800ma low-current ldo linear regulator ev board EV2005DD-00A rev. 1.1 www.monolithicpower.com 1 6/26/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. the future of analog ic technology description the EV2005DD-00A evaluation board demonstrates the performance of mp2005, a monolithic low-current, low-dr opout 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 s upply 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 v in 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 symbol value units input voltage v in 1.0 ? 5 v dropout voltage v dropout 75 mv output current i out 0.5 a features ? 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: 80v rms (10hz to 100khz) ? high psrr: 40db at 1mhz ? stable with low-esr output capacitors ? low 100 a 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 l x w x h) 2.9? x 2.9? x 0.5? (7.5cm x 7.5cm x 1.2cm) board number mps ic number EV2005DD-00A mp2005 120
EV2005DD-00A ? low voltage, 800ma linear regulator ev board EV2005DD-00A rev. 1.1 www.monolithicpower.com 2 6/26/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. evaluation board schematic mp2005 vout fb gnd vin bias en vin vout gnd bias 2v-5v 3.5v-5.5v c3 ns 1.8v/0.5a gnd jp1 jp2 en 1 2 5 4 7 8 EV2005DD-00A bill of materials qty ref value description package manufacturer manufacturer p/n 2 c1, c4 2.2 f ceramic cap., x7r, 16v 1206 tdk c3216x7r1c225k 1 c2 4.7 f ceramic cap., x7r, 16v 1206 tdk c3216x7r1c475k 1 c3 ns not stuffed 1 r1 26.1 k ? film res., 1% 603 panasonic erj-3ekf2612v 1 r2 10 k ? film res., 1% 603 panasonic erj-3ekf1002v 1 jp 10-pin header, 0.1" sullins ptc08saan 1 jp 5-pin header, 0.1" sullins ptc08saan 1 u1 linear regulator qfn-8 mps mp2005dd
EV2005DD-00A ? low voltage, 800ma linear regulator ev board EV2005DD-00A rev. 1.1 www.monolithicpower.com 3 6/26/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. printed circuit board layout figure 1?top silk layer figure 2?top layer figure 3?bottom layer
EV2005DD-00A ? low voltage, 800ma linear regulator ev board notice: the information in this document is subject to change wi thout notice. users should warra nt and guarantee that third party intellectual property rights are not infringed upon w hen integrating mps products into any application. mps will not assume any legal responsibility for any said applications. EV2005DD-00A rev. 1.1 www.monolithicpower.com 4 6/26/2009 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2009 mps. all rights reserved. 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 v in 5v) and input ground to the vin and gnd pins, respectively. 3. attach the bias voltage (3.5v v bias 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 : v in =v bias >(1.8v + v out )and v bias >2.7v 5. the default resistor values on the board are r1=26.1k ? and r2=10k ? . changing these resistor values will change the output voltage. use the following equation to determine resistor values for different output voltages: out r1 v0.5vx(1) r2 =+
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