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| EV8802DJ-00A Low Dropout 250mA Linear Regulator The Future of Analog IC Technology EVALUATION BOARD DESCRIPTION The EV8802DJ-00A is the evaluation board for the MP8802. The board is configured with the MP8802DJ2.5, which provides an output voltage of 2.5V. The MP8802 is a low-noise, low-dropout linear regulator. It operates from 2.7V to 6.5V input voltage, and regulates the output voltage to fixed values of 2.5V, 2.85V, 3.3V or from 1.5V to 5V with the use of external resistors. The MP8802 can supply up to 250mA of load current. The MP8802 features thermal overload protection. It is available in a 5-pin TSOT23-5 package. FEATURES * * * * * * * * * * * * * Low 250mV Dropout at 250mA Output 2% Accurate Output Voltage Fixed Output Voltage Options of 2.5V, 2.85V or 3.3V Adjustable Output Voltage Option from 1.25V to 5V using an External Resistor Divider Up to 6.5V Input Voltage High PSRR o 70dB at 1KHz o 30dB at 1MHz Better Than 0.001%/mA Load Regulation Stable With Low-ESR Output Capacitor Low 125A Ground Current Internal Thermal Protection 802.11 PC Cards Mobile Handset PLL Power Audio Codec Power ELECTRICAL SPECIFICATIONS Parameter Input Voltage Output Voltage (1) Operating Temp Symbol VIN VOUT Value 2.7 to 6.5 2.5 -40 to +85 Units V V C APPLICATIONS Note: 1) 2.5V default output voltage adjustable from 1.5V to 5.0V using an external resistor divider. "MPS" and "The Future of Analog IC Technology" are Registered Trademarks of Monolithic Power Systems, Inc. EV8802DJ-00A EVALUATION BOARD VDROPOUT vs ILOAD 300 250 VDROPOUT (mV) 200 150 100 50 (L x W x H) 2.0" x 2.0" x 0.4" 5.0cm x 5.0cm x 1.0cm Board Number MPS IC Number MP8802DJ2.5 0 0 50 100 150 200 250 300 ILOAD (mA) MP8802_EC01 EV8802DJ-00A EV8802DJ-00A Rev. 1.0 1/25/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved. 1 EV8802DJ-00A -- LOW DROPOUT 250mA LINEAR REGULATOR EVALUATION BOARD EVALUATION BOARD SCHEMATIC VIN IN OUT VOUT R1 NS EN EN MP8802 FB GND R2 NS EV8802DJ-00A_S01 EV8802DJ-00A BILL OF MATERIALS Qty 1 1 1 1 1 1 1 Ref C1 C2 C3 R1 R2 R3 U1 Value Description 1F Ceramic Capacitor, 10V, X7R 0.1F Ceramic Capacitor, 50V, X7R 2.2F Ceramic Capacitor, 10V, X5R Not Stuffed Not Stuffed 10k Resistor, 5% DC-DC Converter 0805 Panasonic ERJ-6GEYJ104V MP8802DJ2.5 SOT23-5 MPS Package Manufacturer 0805 0805 0805 AVX AVX AVX Manufacturer P/N 0805ZC105KAT2A 08055C104KAT2A 0805ZD225KAT2A EV8802DJ-00A Rev. 1.0 1/25/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved. 2 EV8802DJ-00A -- LOW DROPOUT 250mA LINEAR REGULATOR EVALUATION BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1--Top Silk Layer Figure 2--Top Layer Figure 3--Bottom Layer EV8802DJ-00A Rev. 1.0 1/25/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved. 3 EV8802DJ-00A -- LOW DROPOUT 250mA LINEAR REGULATOR EVALUATION BOARD QUICK START GUIDE The output voltage of this board is set to 2.5V. The EN pin is connected to VIN with a 10k resistor for automatic startup. You can connect EN to GND to disable the MP8802. 1. Attach the positive and the negative ends of the load to the VOUT and GND pins, respectively. 2. Attach an input voltage (2.7V VIN 6.5V) and input ground to the VIN and GND pins, respectively. 3. The output voltage (VOUT) can be changed by adding a resistor divider (R1 and R2). A 10k (1%) resistor should be used for the low-side resistor R2 of the voltage divider. The high side resistor R1 can be determined by the equation: V - VFB R1 = R2 x OUT VFB Where VFB is the OUT feedback threshold voltage equal to 1.222V. The following table lists values for R1 corresponding to the selected output voltages: VOUT (V) 1.25 1.5 1.8 2 2.5 2.8 3 3.3 4 5 R1 () 232 2.26k 4.75k 6.34k 10.5k 13k 14.7k 16.9k 22.6k 30.9k 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. EV8802DJ-00A Rev. 1.0 1/25/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. (c) 2006 MPS. All Rights Reserved. 4 |
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