MP8801DJ2.85

EV8801DJ-00A Monolithic Power Systems GENERAL DESCRIPTION The MP8801 is a low-noise, low-dropout linear regulator. It operates from 2.7V to 6.5V input voltage, and regulates the output voltage with 2% accuracy from 1.5V to 5V. The MP8801 can supply up to 150mA of load current. The MP8801 features thermal overload protection. It is available in a 5-pin TSOT23-5 package. Low Dropout 150mA Linear Regulator INITIAL RELEASE FEATURES • • • • • • • • • • • • Low 150mV Dropout at 150mA Output 2% Accurate Output Voltage Default Output Voltage Set to 2.85V, Adjustable from 1.5V 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 125µA 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 2.85 –40 to +85 Units V V °C APPLICATIONS Note: 1) 2.85V default output voltage adjustable from 1.5V to 5.0V using an external resistor divider. , “MPS”, “Monolithic Power Systems”, and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV8801DJ-00A EVALUATION BOARD 160 140 VDROPOUT vs ILOAD VDROPOUT (mV) 120 100 80 60 40 20 0 0 20 40 60 80 100 120 140 160 ILOAD (mA) MP8801_EC01 Dimensions (2.0”X x 2.0”Y x 0.4”Z) Board Number MPS IC Number MP8801DJ2.85 www.MonolithicPower.com 1 EV8801DJ-00A 12/04, Rev. 1.0 EV8801DJ-00A — LOW DROPOUT 150mA LINEAR REGULATOR INITIAL RELEASE EVALUATION BOARD SCHEMATIC VIN IN OUT VOUT R1 NS EN EN MP8801 FB GND R2 NS EV8801DJ-00A_S01 EV8801DJ-00A BILL OF MATERIALS Qty 1 1 1 1 1 1 1 Ref C1 C2 C3 R1 R2 R3 U1 Value Description 1µF Ceramic Cap, 10V, X7R 0.1µF Ceramic Cap, 50V, X7R 2.2µF Ceramic Cap, 10V, X5R Do Not Stuff Do Not Stuff 10kΩ Film Res, 5% DC-DC Converter Panasonic MPS ERJ-6GEYJ104V MP8801DJ2.85 Manufacturer AVX AVX AVX Manufacturer P/N 0805ZC105KAT2A 08055C104KAT2A 0805ZD225KAT2A 12/04, Rev. 1.0 www.MonolithicPower.com 2 EV8801DJ-00A — LOW DROPOUT 150mA LINEAR REGULATOR INITIAL RELEASE PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer 12/04, Rev. 1.0 www.MonolithicPower.com 3 EV8801DJ-00A — LOW DROPOUT 150mA LINEAR REGULATOR INITIAL RELEASE QUICK START GUIDE The output voltage of this board is set to 2.85V. The EN pin is connected to VIN with a 10kΩ resistor for automatic startup. You can connect EN to GND to disable the MP8801. Attach the positive and the negative ends of the load to the VOUT and GND pins, respectively. Attach an input voltage (2.7V ≤ VIN ≤ 6.5V) and input ground to the VIN and GND pins, respectively. The output voltage (VOUT) can be changed by adding a resistor divider (R1 and R2). A 10kΩ (±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 × ⎜ OUT ⎜ VFB ⎝ ⎞ ⎟ ⎟ ⎠ Where VFB is the OUT feedback threshold voltage equal to 1.222V. The following table lists the R1 selected values for some typical output voltages: VOUT (V) 1.25 1.5 1.8 2 2.5 2.8 3 3.3 4 5 R1 (Ω) 232 2.26k 4.75k 6.34k 10.5k 13k 14.7k 16.9k 22.6k 30.9k NOTICE: MPS believes the information in this document to be accurate and reliable. However, it is subject to change without notice. Contact MPS for current specifications. MPS encourages users of its products to ensure that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS cannot assume any legal responsibility for any said applications. EV8801DJ-00A Rev. 1.0 Monolithic Power Systems, Inc. 12/6/04 983 University Avenue, Building A, Los Gatos, CA 95032 USA © 2004 MPS, Inc. Tel: 408-357-6600 ♦ Fax: 408-357-6601 ♦ www.MonolithicPower.com 4