EV4470/4470A-L-01A High-Efficiency, Fast-Transient, 5A, 36V Step-Down Converter Evaluation Board The Future of Analog IC Technology DESCRIPTION FEATURES The EV4470-L-01A is an evaluation board for the MP/MPQ4470, while EV4470A-L-01A is an evaluation board for the MP/MPQ4470A. • • • MP/MPQ4470 and MP/MPQ4470A are highefficiency step-down regulator with integrated power MOSFETs. They offer a very compact solution to achieve a 5A, continuous-output current over a wide input-supply range with excellent load and line regulation. They also provide fast transient response and good stability for wide input-supply and load range. MP/MPQ4470 have OVP latch while MP/MPQ4470A have no this function. The EV4470-L-01A and EV4470A-L-01A are fully assembled and tested evaluation boards. They generate +3.3V output voltage at load current up to 5A from a 4.5V to 36V input range. Switching frequency of both boards are set at 500kHz. ELECTRICAL SPECIFICATIONS Parameter Input Voltage Output Voltage Output Current Symbol Value Units VIN 4.5 – 36 V VOUT IOUT 3.3 5 V A • • • • • Wide 4.5V-to-36V Operating Input Range Guaranteed 5A, Continuous Output Current Internal 40mΩ High-Side, 20mΩ Low-Side Power MOSFETs Proprietary Switching-Loss-Reduction Technology 1% Reference Voltage Programmable Soft-Start Time Low Drop-out Mode SCP, OCP, OVP latch (EV4470 only), UVP and Thermal Shutdown APPLICATIONS • • • • • • Notebook Systems and I/O Power Automotive Systems Networking Systems Industrial Supplies Optical Communications Systems Distributed Power and POL Systems All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EVALUATION BOARD (L x W x H) 2.5” x 2.5” x 0.4” (6.4cm x 6.4cm x 1.0cm) (L x W x H) 2.5” x 2.5” x 0.4” (6.4cm x 6.4cm x 1.0cm) Board Number MPS IC Number Board Number MPS IC Number EV4470-L-01A MPQ4470GL EV4470A-L-01A MPQ4470AGL EV4470/4470A-L-00A Rev. 1.0 www.MonolithicPower.com 5/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 1 EV4470/4470A-L-00A – 5A, 36V, STEP-DOWN CONVERTER EVALUATION BOARD EVALUATION BOARD SCHEMATIC U1 VIN 4.5-36V Vin GND C1B 10uF 50V 1210 C1C 0.1uF 50V 0603 C1D 0.1uF 50V 0805 2 20 R7 63.4K 1% C5 1uF 16V PGOOD R6 100K 5% 6 7 R3 4.99 1% MPQ4470/ 4470A C3 0.1uF 50V FREQ SW R4 C4 620K390pF 1% 50V PGOOD EN FB EN VOUT GND 31.6K 1% R2 10K 1% 11-16 1 4 EN VOUT 3.3V/5A C2A C2B C2C 22uF 22uF 0.1uF 16V 16V 1210 1210 R9 0 5% R1 3 Vin R5 499K 1% L1 10uH 9,10,17,18 VCC SS 5 BST PGND C1A 10uF 50V 1210 IN AGND 8,19 C6 33nF 50V R8 NS EV4470/4470A-L-01A BILL OF MATERIALS Qty RefDes Value Description 2 10uF Ceramic Cap., 50V, X7R 1210 muRata 0.1uF Ceramic Cap., 50V, X7R 0603 TDK 1 2 1 1 1 C1A,C1B C1C,C2C, C3 C1D C2A,C2B C4 C5 C6 0.1uF 22uF 390pF 1uF 33nF 0805 1210 0603 0603 0603 muRata muRata muRata muRata muRata 1 L1 10uH SMD Wurth 7443251000 1 1 1 1 1 1 1 1 1 R1 R2 R3 R4 R5 R6 R7 R9 R8 31.6k 10k 4.99Ω 620k 499k 100k 63.4k 0Ω NS Ceramic Cap., 50V, X7R Ceramic Cap., 16V, X7R Ceramic Cap., 50V, C0G Ceramic Cap., 16V, X7R Ceramic Cap., 50V, X7R Inductor, 16.3mOhm, 7.2A Film Res., 1% Film Res., 1% Film Res., 1% Film Res., 1% Film Res., 1% Film Res., 5% Film Res., 1% Film Res., 5% 0603 0603 0603 0603 0603 0603 0603 0603 Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo RC0603FR-0731K6L RC0603FR-0710KL RC0603FR-074R99L RC0603FR-07620KL RC0603FR-07499KL RC0603JR-07100KL RC0603FR-0763K4L RC0603JR-070RL 3 1 U1 Step-Down Regulator Package QFN203x4 Manufacturer Manufactuer_P/N MPS GRM32ER71H106KA12L C1608X7R1H104K GRM21BR72A104KAC4L GRM32ER71C226KE79 GRM1885C1H391JA01D GRM188R71C105KA12D GRM188R71H333KA61D MPQ4470GL (for EV4470) MPQ4470AGL (for EV4470A) EV4470/4470A-L-00A Rev. 1.0 www.MonolithicPower.com 5/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 2 EV4470/4470A-L-00A – 5A, 36V, STEP-DOWN CONVERTER EVALUATION BOARD EVB TEST RESULTS Performance waveforms are tested on the evaluation board. VIN = 24V, VOUT = 3.3V, TA = 25°C, unless otherwise noted. 100 50 90 45 80 40 70 35 60 30 50 25 40 20 30 15 20 10 10 5 0 0.01 0.1 1 10 0 700 600 500 400 300 1 1.5 2 2.5 3 3.5 4 4.5 5 1.50 550 1 1.5 2 2.5 3 3.5 4 4.5 5 1.00 1.00 0.50 0.50 0.00 500 0.00 -0.50 -0.50 -1.00 450 0 5 10 15 20 25 30 35 40 -1.50 0 10 20 30 40 -1.00 0 1 2 EV4470/4470A-L-00A Rev. 1.0 www.MonolithicPower.com 5/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 3 4 5 3 EV4470/4470A-L-00A – 5A, 36V, STEP-DOWN CONVERTER EVALUATION BOARD EVB TEST RESULTS (continued) Performance waveforms are tested on the evaluation board. VIN = 24V, VOUT = 3.3V, TA = 25°C, unless otherwise noted. EV4470/4470A-L-00A Rev. 1.0 www.MonolithicPower.com 5/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 4 EV4470/4470A-L-00A – 5A, 36V, STEP-DOWN CONVERTER EVALUATION BOARD EVB TEST RESULTS (continued) Performance waveforms are tested on the evaluation board. VIN = 24V, VOUT = 3.3V, TA = 25°C, unless otherwise noted. EV4470/4470A-L-00A Rev. 1.0 www.MonolithicPower.com 5/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 5 EV4470/4470A-L-00A – 5A, 36V, STEP-DOWN CONVERTER EVALUATION BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Inner1 Layer Figure 4—Inner2 Layer Figure 5—Bottom Layer EV4470/4470A-L-00A Rev. 1.0 www.MonolithicPower.com 5/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 6 EV4470/4470A-L-00A – 5A, 36V, STEP-DOWN CONVERTER EVALUATION BOARD QUICK START GUIDE 1. Connect the positive and negative terminals of the load to the VOUT and GND pins, respectively. 2. Preset the power supply output to between 4.5 and 36V, and then turn it off. 3. Connect the positive and negative terminals of the power supply output to the VIN and GND pins, respectively. 4. Turn the power supply on. The MPQ4470/4470AGL will automatically startup. 5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.25V to turn on the regulator, drive EN less than 0.86V to turn it off. 6. An input under voltage lockout (UVLO) function is implemented by the addition of a resistor divider R5 and R8. The EN threshold is 0.86V (falling edge), so VIN UVLO threshold is. 0.86 × (1 + R5 ) R8 7. Use R1 and R2 to set the output voltage with VFB = 0.815V. For R2 = 10kΩ, R1 can be determined by: R1 = 12.27 × ( VOUT − 0.815) (kΩ). Follow the Application Information section in the device datasheet to recalculate the compensation, inductor and output capacitor values when output voltage is changed. NOTICE: The information in this document is subject to change without notice. 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. EV4470/4470A-L-00A Rev. 1.0 www.MonolithicPower.com 5/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2014 MPS. All Rights Reserved. 7