EVBL4415A-QB-00A

EVBL4415A-QB-00A High-Efficiency, 1.5A, 36V, 2.2MHz Synchronous Step-Down Converter Evaluation Board DESCRIPTION FEATURES The EVBL4415A-QB-00A is an evaluation board designed for the MP4415A and MPQ4415A. It features and MPS inductor.   The MP4415A is a synchronous, rectified, stepdown switch-mode converter with build-in power MOSFETs. The device offers a very compact solution to achieve 1.5A of continuous output current with excellent load and line regulation across a wide input supply range. The MP4415A uses synchronous mode operation to achieve high efficiency across the output current load range.  The MP4415A is available in a QFN-13 (2.5mmx3mm) package. ELECTRICAL SPECIFICATIONS Parameter Input voltage Output voltage Output current Symbol Value Units VIN VOUT IOUT 4 to 36 3.3 1.5 V V A           Wide 4V to 36V Operating Input Range 90mΩ High-Side/50mΩ Low-Side Internal Power MOSFETs High-Efficiency Synchronous Mode Operation Default 2.2MHz Switching Frequency 450kHz to 2.2MHz Frequency Sync Forced Continuous Conduction Mode (FCCM) High Duty Cycle for Automotive Cold Crank Internal Soft Start (SS) Power Good (PG) Indicator Over-Current Protection (OCP) with Valley Current Detection and Hiccup Mode Thermal Shutdown Output Adjustable from 0.8V Available in a QFN-13 (2.5mmx3mm) Package Optimized Performance with MPS Inductor MPL-AT2514 Series APPLICATIONS    Automotive  Industrial Control System Distributed Power Systems All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are trademarks of Monolithic Power Systems, Inc. or its subsidiaries. EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 1 EVBL4415A-QB-00A – 36V, 1.5A, SYNC STEP-DOWN CONVERTER EVAL BOARD EVBL4415A-QB-00A EVALUATION BOARD Efficiency vs. Load Current VOUT = 3.3V 80% EFFICIENCY 70% LxWxH (6.35cmx6.35cmx0.5cm) Board Number MPS IC Number MP4415AGQB, EVBL4415A-QB-00A MPQ4415AGQB 1.80 Vin=12V Vin=24V Vin=36V 1.60 1.40 60% 1.20 50% 1.00 40% 0.80 30% 0.60 20% 0.40 10% 0.20 0% POWER LOSS (W) 90% 0.00 1 10 100 1000 LOAD CURRENT (mA) EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 2 EVBL4415A-QB-00A – 36V, 1.5A, SYNC STEP-DOWN CONVERTER EVAL BOARD QUICK START GUIDE 1. Connect the load terminals to: a. Positive (+): VOUT b. Negative (-): GND Note that electronic loads represent a negative impedance to the regulator, so a high current can trigger hiccup mode. 2. Preset the power supply output to be between 4 and 36V, then turn it off. If longer cables (>0.5m total) are used between the source and the EVB, install a damping capacitor at the input terminals, especially when VIN is greater than or equal to 24V. 3. Connect the power supply output terminals to: a. Positive (+): VIN b. Negative (-): GND. 4. Turn the power supply on. The MP4415A should automatically start up. 5. To use the enable function, apply a digital input to the EN/SYNC pin. Drive EN/SYNC above 1.45V to turn the regulator on; drive EN below 1V to turn it off. 6. To use the sync function, apply a 450kHz to 2.2MHz external clock to the EN/SYNC pin to synchronize the internal clock rising edge. 7. The output voltage is set by the external resistor divider. The feedback resistor (RFB1) also sets the feedback loop bandwidth with the internal compensation capacitor. Choose RFB1 to be around 40kΩ when VOUT ≥1V. RFB2 can then be calculated with Equation (1): R FB2  R FB1 VOUT 1 0.807V (1) 8. The T-type network is highly recommended when VOUT is low (see Figure 1) FB RT R FB1 VOUT R FB2 Figure 1: T-Type Network 9. RT and RFB1 are used to set the loop bandwidth. The lower RT and RFB1 is, the higher the bandwidth. However, a high bandwidth may cause an insufficient phase margin, which results in an unstable loop. Select an appropriate value for RT to make a tradeoff between the bandwidth and phase margin. Table 1 lists the recommended feedback resistor and RT values for common output voltages. Table 1: Recommended Feedback Resistors and Output Voltages VOUT (V) RFB1 (kΩ) RFB2 (kΩ) RT (kΩ) 3.3 41.2 (1%) 13 (1%) 51 (1%) 5 41.2 (1%) 7.68 (1%) 51 (1%) EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 3 EVBL4415A-QB-00A – 36V, 1.5A, SYNC STEP-DOWN CONVERTER EVAL BOARD EVALUATION BOARD SCHEMATIC 4V to 36V VEMI CIN1 CIN2 NS NS GND CIN3 NS CIN5 is for damping the input C and L cable. L1 NS CIN4 NS 1, 2 IN C1A C1B C1C 10µF CIN5 10µF EN Apply a 450kHz to 2.2MHz external clock to synchronize the internal clock. 10µF R1 1MΩ 0.1µF 50V 50V 50V 5 1.45V 0.45V Hyst. R2 D1 optional for high duty cycle R3 for EMC U1 BST R3 D1 20Ω C3 0.1µF NS 10 MP4415A NS L2 EN/SYNC SW 9 2.2µH NS 4.9V 7 R7 100kΩ C4 33pF 4 PG 11, 12, 13 PG Open Drain output, pulled to low if load short, open load, or thermal shutdown occurs. L3 Short C5 47µF 10V C6 NS C7 NS 3.3V/1.5A VOUT C8 NS GND NC 3 VCC C2 0.1µF GND FB1 NS AGND Input EMC Filter FB 8 VIN R4 6 51kΩ 0.807V R6 41.2kΩ R5 13kΩ Reference for FB divider selection VOUT (V) 5 2.5 1.8 R6 (kΩ) 41.2(1%) 41.2(1%) 41.2(1%) R5 (kΩ) 7.68(1%) 19.6(1%) 33.5(1%) Figure 2: Evaluation Board Schematic PACKAGE REFERENCE TOP VIEW IN IN PGND PGND PGND BST 13 12 11 10 9 SW 8 AGND 7 VCC 1 2 3 4 5 6 NC PG EN/ SYNC FB QFN-13 (2.5mmx3mm)   EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 4 EVBL4415A-QB-00A – 36V, 1.5A, SYNC STEP-DOWN CONVERTER EVAL BOARD EVBL4415A-QB-00A BILL OF MATERIALS Qty Designator CIN1, CIN2, CIN3, CIN4, CIN5 Value 2 C1A, C1B 10μF 1 C1C 0.1μF 2 C2, C3 0.1μF 1 C4 33pF 1 C5 47μF 3 1 1 1 C6, C7, C8 D1 FB1 L1 NS NS NS NS 1 L2 2.2μH 1 1 1 1 1 1 1 1 L3 R1 R3 R4 R5 R6 R7 R2 NS 1MΩ 20Ω 51kΩ 13kΩ 41.2kΩ 100kΩ NS 1 U1 MP4415A 5 5 4 VIN, VEMI, GND, GND, VOUT PG, GND, EN/SYNC, GND Description Package Manufacture Manufacturer PN 1206 Murata GRM31CR61H106KA12L 0603 Murata GRM188R71H104KA93D 0603 Murata GRM188R71C104KA01D 0603 Murata GRM1885C1H330JA01D 1210 Murata GRM32ER61A476KE20L Inductor, 70mΩ DCR, 2.5A SMD MPS MPL-AT2514-2R2 Film resistor, 5% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% 0603 0603 0603 0603 0603 0603 Yageo Yageo Yageo Yageo Yageo Yageo RC0603JR-071ML RC0603FR-0720RL RC0603FR-0751KL RC0603FR-0713KL RC0603FR-0741K2L RC0603FR-07100KL QFN-13 (2mmx 3mm) MPS MP4415AGQB 2.0 golden pin DIP MPS (1) 2.54mm test pin DIP Any NS 2.0 2.54mm Ceramic capacitor, 50V, X5R Ceramic capacitor, 50V, X7R Ceramic capacitor, 16V, X7R Ceramic capacitor, 50V, C0G Ceramic capacitor, 10V, X5R Step-down converter Note: 1) Contact an MPS FAE for more information regarding these pins. EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 5 EVBL4415A-QB-00A – 36V, 1.5A, SYNC STEP-DOWN CONVERTER EVAL BOARD EVB TEST RESULTS VIN = 12V, VOUT = 3.3V, L = 2.2µH, fSW = 2.2MHz, TA = 25°C, unless otherwise noted. VOUT = 5V 70% 1.80 100% 1.60 90% 1.40 80% 2.00 Vin=12V Vin=24V Vin=36V 1.80 1.60 70% 1.40 60% 1.20 50% 1.00 40% 0.80 30% 0.60 1.20 50% 1.00 40% 0.80 30% 0.60 20% 0.40 20% 0.40 10% 0.20 10% 0.20 0% 0.00 0% 1 10 100 LOAD CURRENT (mA) 1000 EFFICIENCY 60% POWER LOSS (W) Vin=12V Vin=24V Vin=36V 80% EFFICIENCY Efficiency vs. Load Current VOUT = 3.3V POWER LOSS (W) 90% Efficiency vs. Load Current 0.00 1 10 100 1000 LOAD CURRENT (mA) EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 6 EVBL4415A-QB-00A – 36V, 1.5A, SYNC STEP-DOWN CONVERTER EVAL BOARD EVB TEST RESULTS (continued) VIN = 12V, VOUT = 3.3V, L = 2.2µH, fSW = 2.2MHz, TA = 25°C, unless otherwise noted. Steady State Steady State IOUT = 0A IOUT = 1.5A CH3: VPG CH3: VPG CH1: VSW CH1: VSW CH2: VOUT/AC CH2: VOUT/AC CH4: IL CH4: IL Start-Up Start-Up IOUT = 0A IOUT = 1.5A CH3: VIN CH3: VIN CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL Shutdown Shutdown IOUT = 0A IOUT = 1.5A CH3: VIN CH3: VIN CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 7 EVBL4415A-QB-00A – 36V, 1.5A, SYNC STEP-DOWN CONVERTER EVAL BOARD EVB TEST RESULTS (continued) VIN = 12V, VOUT = 3.3V, L = 2.2µH, fSW = 2.2MHz, TA = 25°C, unless otherwise noted. EN On EN On IOUT = 0A IOUT = 1.5A CH3: VEN CH3: VEN CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL EN Off EN Off IOUT = 0A IOUT = 1.5A CH3: VEN CH3: VEN CH1: VSW CH1: VSW CH2: VOUT CH4: IL CH2: VOUT CH4: IL SCP Entry SCP Entry IOUT = 0A IOUT = 1.5A CH3: VPG CH3: VPG CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 8 EVBL4415A-QB-00A – 36V, 1.5A, SYNC STEP-DOWN CONVERTER EVAL BOARD EVB TEST RESULTS (continued) VIN = 12V, VOUT = 3.3V, L = 2.2µH, fSW = 2.2MHz, TA = 25°C, unless otherwise noted. SCP Recovery SCP Steady State IOUT = 0A CH3: VPG CH3: VPG CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL SCP Recovery Load Transient IOUT = 1.5A IOUT = 0A to 1.5A CH3: VPG CH2: VOUT/AC CH1: VSW CH2: VOUT CH4: IOUT CH4: IL Cold Crank Cold Crank VIN = 12V to 4V to 5V, IOUT = 0A VIN = 12V to 4V to 5V, IOUT = 1.5A CH3: VIN CH3: VIN CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 9 EVBL4415A-QB-00A – 36V, 1.5A, SYNC STEP-DOWN CONVERTER EVAL BOARD EVB TEST RESULTS (continued) VIN = 12V, VOUT = 3.3V, L = 2.2µH, fSW = 2.2MHz, TA = 25°C, unless otherwise noted. VIN Ramp Down and Up VIN Ramp Down and Up VIN = 18V to 4.5V to 0V to 4.5V to 18V, IOUT = 0A, VOUT connected to a diode with BST VIN = 18V to 4V to 0V to 4V to 18V, IOUT = 1.5A CH3: VIN CH3: VIN CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL Load Dump VIN = 12V to 36V to 12V, IOUT = 1.5A CH3: VIN CH1: VSW CH2: VOUT CH4: IL EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 10 EVBL4415A-QB-00A – 36V, 1.5A, SYNC STEP-DOWN CONVERTER EVAL BOARD PCB LAYOUT Figure 3: Top Silk Layer and Top Layer Figure 4: Inner Layer 1 Figure 5: Inner Layer 2 Figure 6: Bottom Silk Layer and Bottom Layer EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 11 EVBL4415A-QB-00A – 36V, 1.5A, SYNC STEP-DOWN CONVERTER EVAL BOARD REVISION HISTORY 1.0 Revision Date 10/8/2019 1.1 9/10/2021 Revision # Description Pages Updated Initial Release Updated BOM Grammatical and clerical updates Page 5 All 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. EVBL4415A-QB-00A Rev. 1.1 MonolithicPower.com 9/10/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 12