TM EV1517DR-00A 3A, 25V, 1.1MHz Step-Up Converter The Future of Analog IC Technology TM EVALUATION BOARD GENERAL DESCRIPTION FEATURES 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. • • • • • • • • • • • 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 APPLICATIONS • • • • Boost and SEPIC Regulators Handheld Computers Cell Phone Camera Flash, PDAs Digital Still and Video Cameras “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 Value Units VIN VOUT IOUT 5 12 1 V V A EV1517DR-00A EVALUATION BOARD Efficiency vs Load Current 100 95 VOUT = 12V EFFICIENCY (%) 90 85 80 75 70 VOUT = 18V 65 60 Dimensions (2.0”X x 2.0”Y x 0.4”Z) Board Number MPS IC Number EV1517DR-00A MP1517DR EV1517DR-00A Rev. 1.0 6/8/2005 VIN = 5V 55 50 1 10 100 LOAD CURRENT (mA) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 1000 MP1517-EC01 1 TM EV1517DR-00A – 3A, 25V, 1.1MHz STEP-UP CONVERTER EVALUATION BOARD EVALUATION BOARD SCHEMATIC VIN 5V GND U1 4 EN 8 IN SW EN GND SW 15 FB MP1517 BP C5 10nF COMP 7 D1 B320A-13 20V/3A 9 12V GND SS C4 10nF 3 VOUT 10 OLS SGND SGND 5 16 1 PGND PGND 13 11 12 C3 1nF C6 NS EV1517_S01 EV1517DR-00A BILL OF MATERIALS Qty Ref Value Description 1 C1 10µF Ceramic Cap, 6.3V, X5R 1210 TDK C3225X5R1A106K 2 C2A, C2B 10µF Ceramic Cap, 16V, X7R 1210 TDK C3225X7R1C106M 1 C3 1nF Ceramic Cap, 50V, X7R 0805 TDK C2012X7R1H102K 2 C4, C5 10nF Ceramic Cap, 50V, X7R 0805 TDK C2012X7R1H103K 1 C6 Do Not Stuff 1 D1 Schottky Diode, 20V, 3A, SMA Diodes Inc B320A-13 1 L1 4.7µH 5.6A Sumida CDRH8D43-4R7NC 1 R1 162kΩ Metal Film Res, 1% 0805 Panasonic ERJ-6ENF1623V 1 R2 10kΩ Metal Film Res, 1% 0805 Panasonic ERJ-6ENF1002V 1 R3 20kΩ Metal Film Res, 5% 0805 Panasonic ERJ-6GEYJ203V 1 R4 100kΩ Metal Film Res, 5% 0805 Panasonic ERJ-6GEYJ104V 1 U1 MPS MP1517DR EV1517DR-00A Rev. 1.0 6/8/2005 DC-DC Converter Package Manufacturer Manufacturer P/N 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 Feedback Voltage vs Temperature 100 715 FEEDBACK VOLTAGE (mV) VOUT = 18V 95 EFFICIENCY (%) 90 85 VOUT = 22V 80 75 70 65 60 VIN = 12V 55 50 1 10 100 1000 LOAD CURRENT (mA) 710 705 700 695 690 685 -50 10000 50 100 0 TEMPERATURE (°C) MP1517-EC01 150 MP1517-TPC01 Frequency vs Temperature Maximum Duty Cycle vs Temperature 1.15 91.8 DUTY CYCLE (%) FREQUENCY (MHz) 91.7 1.10 1.05 91.6 91.5 91.4 91.3 91.2 1.00 -50 0 50 100 TEMPERATURE (°C) 91.1 -50 150 0 50 100 TEMPERATURE (°C) MP1517-TPC02 Operating Supply Current vs Temperature MP1517-TPC03 BP Voltage vs Temperature Current Limit vs Temperature 4.8 920 2.42 4.6 880 860 2.41 2.40 2.39 2.38 840 2.37 820 -50 2.36 -50 0 50 100 TEMPERATURE (°C) 150 MP1517-TPC04 EV1517DR-00A Rev. 1.0 6/8/2005 CURRENT LIMIT (A) 2.43 BP VOLTAGE (V) 940 900 150 4.4 4.2 4.0 3.8 3.6 3.4 3.2 0 50 100 TEMPERATURE (°C) 150 3.0 -50 MP1517-TPC05 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. 0 50 100 TEMPERATURE (°C) 150 MP1517-TPC06 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 ⎝ VFB ⎠ 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