MP1517DR

TM EV1517DR-00A 3A, 25V, 1.1MHz Step-Up Converter EVALUATION BOARD The Future of Analog IC Technology TM GENERAL DESCRIPTION The EV1517DR-00A is the evaluation board for the MP1517, a 3A, fixed frequency step-up converter ideal for medium-to-high current step-up applications. The high 1.1MHz switching frequency allows for smaller external components producing a compact solution for size constrained cameras, PDAs and cell phones. The low 0.7V feedback voltage offers higher efficiency in white LED driver applications including cell phone camera flash. The MP1517 regulates the output voltage up to 25V with efficiencies greater than 90%. Soft-start, cycle-by-cycle current limiting, and input under voltage lockout prevent overstressing or damage to sensitive external circuitry at startup and output short-circuit conditions. Current-mode regulation and external compensation components allow the MP1517 control loop to be optimized over a wide variety of input voltage, output voltage, and load current conditions. The MP1517 is available in the thermally enhanced QFN16 (4mm x 4mm) package. FEATURES • • • • • • • • • • • • • • • 4A Peak Current Limit Low 700mV Feedback Threshold Internal 150mΩ Power Switch Input Range of 2.6V to 25V Over 90% Efficiency Zero Current Shutdown Mode Under Voltage Lockout Protection Open Load Protection Soft-Start Operation Thermal Shutdown Tiny 4mm x 4mm 16-Pin QFN Package Boost and SEPIC Regulators Handheld Computers Cell Phone Camera Flash, PDAs Digital Still and Video Cameras APPLICATIONS “MPS” and “The Future of Analog IC Technology”, are Trademarks of Monolithic Power Systems, Inc. ELECTRICAL SPECIFICATIONS Parameter Input Voltage Output Voltage Output Current Symbol VIN VOUT IOUT Value 5 12 1 Units V V A EV1517DR-00A EVALUATION BOARD Efficiency vs Load Current 100 95 90 VOUT = 12V EFFICIENCY (%) 85 80 75 70 65 60 55 50 1 VOUT = 18V VIN = 5V 10 100 LOAD CURRENT (mA) 1000 MP1517-EC01 Dimensions (2.0”X x 2.0”Y x 0.4”Z) Board Number EV1517DR-00A EV1517DR-00A Rev. 1.0 6/8/2005 MPS IC Number MP1517DR www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 1 TM EV1517DR-00A – 3A, 25V, 1.1MHz STEP-UP CONVERTER EVALUATION BOARD EVALUATION BOARD SCHEMATIC VIN 5V GND U1 EN GND 15 SS 4 EN 8 IN SW SW 10 9 VOUT D1 B320A-13 20V/3A 12V GND C4 10nF 3 BP MP1517 FB 16 C5 10nF 7 OLS SGND SGND 5 13 COMP 1 PGND PGND 11 12 C3 1nF C6 NS EV1517_S01 EV1517DR-00A BILL OF MATERIALS Qty 1 2 1 2 1 1 1 1 1 1 1 1 Ref C1 C2A, C2B C3 C4, C5 C6 D1 L1 R1 R2 R3 R4 U1 Value Description 10µF Ceramic Cap, 6.3V, X5R 10µF Ceramic Cap, 16V, X7R 1nF 10nF Ceramic Cap, 50V, X7R Ceramic Cap, 50V, X7R Do Not Stuff Schottky Diode, 20V, 3A, SMA 4.7µH 5.6A 162kΩ Metal Film Res, 1% 10kΩ Metal Film Res, 1% 20kΩ Metal Film Res, 5% 100kΩ Metal Film Res, 5% DC-DC Converter 0805 0805 0805 0805 Diodes Inc Sumida Panasonic Panasonic Panasonic Panasonic MPS B320A-13 CDRH8D43-4R7NC ERJ-6ENF1623V ERJ-6ENF1002V ERJ-6GEYJ203V ERJ-6GEYJ104V MP1517DR Package Manufacturer Manufacturer P/N 1210 1210 0805 0805 TDK TDK TDK TDK C3225X5R1A106K C3225X7R1C106M C2012X7R1H102K C2012X7R1H103K EV1517DR-00A Rev. 1.0 6/8/2005 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 2 TM EV1517DR-00A – 3A, 25V, 1.1MHz STEP-UP CONVERTER EVALUATION BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Bottom Layer EV1517DR-00A Rev. 1.0 6/8/2005 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 3 TM EV1517DR-00A – 3A, 25V, 1.1MHz STEP-UP CONVERTER EVALUATION BOARD TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current 100 FEEDBACK VOLTAGE (mV) 95 90 EFFICIENCY (%) 85 80 75 70 65 60 55 50 1 VIN = 12V 10 100 1000 LOAD CURRENT (mA) 10000 MP1517-EC01 Feedback Voltage vs Temperature 715 710 705 700 695 690 685 -50 50 100 0 TEMPERATURE (°C) 150 VOUT = 18V VOUT = 22V MP1517-TPC01 Frequency vs Temperature 1.15 91.8 91.7 FREQUENCY (MHz) DUTY CYCLE (%) 1.10 91.6 91.5 91.4 91.3 91.2 1.00 -50 0 50 100 TEMPERATURE (°C) 150 Maximum Duty Cycle vs Temperature 1.05 91.1 -50 0 50 100 TEMPERATURE (°C) 150 MP1517-TPC02 MP1517-TPC03 Operating Supply Current vs Temperature 940 920 900 880 860 840 820 -50 0 50 100 TEMPERATURE (°C) 150 2.43 2.42 BP Voltage vs Temperature 4.8 4.6 4.4 4.2 4.0 3.8 3.6 3.4 3.2 0 50 100 TEMPERATURE (°C) 150 Current Limit vs Temperature BP VOLTAGE (V) 2.41 2.40 2.39 2.38 2.37 2.36 -50 CURRENT LIMIT (A) 3.0 -50 0 50 100 TEMPERATURE (°C) 150 MP1517-TPC04 MP1517-TPC05 MP1517-TPC06 EV1517DR-00A Rev. 1.0 6/8/2005 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 4 TM EV1517DR-00A – 3A, 25V, 1.1MHz STEP-UP CONVERTER EVALUATION BOARD QUICK START GUIDE The output voltage of this board is set to 12V. The board layout accommodates most commonly used inductors and output capacitors. 1. Preset Power Supply to 2.6V ≤ VIN ≤ 6V. 2. Turn Power Supply off. 3. Connect Power Supply terminals to: Positive (+): VIN, EN Negative (–): GND 4. Connect Load to: Positive (+): VOUT Negative (–): GND 5. Turn Power Supply on after making connections. 6. The MP1517 is enabled on the evaluation board once VIN is applied. To disable the MP1517, disconnect EN from VIN. 7. The output voltage VOUT can be changed by varying R1. Calculate the new value using the formula: ⎛V ⎞ R1 = ⎜ OUT − 1⎟R2 ⎜V ⎟ ⎝ FB ⎠ Where VFB = 0.7V and R2 = 10kΩ For example, for VOUT = 15V ⎛ 15 V ⎞ − 1⎟ × 10kΩ = 204.3kΩ R1 = ⎜ ⎝ 0. 7 V ⎠ Therefore use a 205kΩ standard 1% value resistor. 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. EV1517DR-00A Rev. 1.0 6/8/2005 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 5