EVQ2178-LE-00A

EVQ2178-LE-00A 5.5V, 2A, 2.4MHz, Synchronous Step-Down Converter with PG and SS Evaluation Board, AEC-Q100 Qualified DESCRIPTION FEATURES The EVQ2178-LE-00A is an evaluation board designed to demonstrate the capabilities of the MPQ2178, a monolithic, step-down switchmode converter with integrated internal power MOSFETs.  The EVQ2178-LE-00A achieves 2A of continuous output current (IOUT) across a 2.5V to 5.5V input voltage (VIN) range, with excellent load and line regulation. The output voltage (VOUT) can be regulated to as low as 0.6V. Fault protections include cycle-by-cycle current limiting and thermal shutdown. The EVQ2178-LE-00A is a fully assembled and tested evaluation board. It generates a 1.2V VOUT at load currents up to 2A across a 2.5V to 5.5V VIN range. The MPQ2178 is available in a compact QFN-8 (1.5mmx2mm) package.     ELECTRICAL SPECIFICATIONS Parameter Input voltage Output voltage Output current Symbol Value Units VIN VOUT IOUT 2.5 to 5.5 1.2 2 V V A Designed for Automotive Applications: o Wide 2.5V to 5.5V Operating Input Voltage (VIN) Range o Up to 2A Output Current (IOUT) o 1% Feedback (FB) Accuracy High Performance for Improved Thermals: o 70mΩ and 40mΩ Integrated Internal Power MOSFETs Optimized for EMC and EMI: o 2.4MHz Switching Frequency (fSW) o Forced Continuous Conduction Mode (CCM) Across the Full Load Range Optimized for Board Size and BOM: o Integrated Compensation Network o Available in a QFN-8 (1.5mmx2mm) Package o Available in AEC-Q100 Grade 1 Additional Features: o Power Good (PG) o External Soft-Start (SS) Control o Output Discharge o Over-Voltage Protection (OVP) and Short-Circuit Protection (SCP) with Hiccup Mode APPLICATIONS      Automotive Clusters, Telematics, and Infotainment Systems Camera Modules Key Fobs Industrial Supplies Battery-Powered Devices 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. EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 1 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 EVQ2178-LE-00A EVALUTION BOARD 100 90 80 70 60 50 40 30 20 10 0 VOUT = 1.2V, L = 1μH, (XEL4020-102MEB, DCR = 13.25mΩ) 1.0 0.9 0.8 0.7 0.6 EFFICIENCY 0.5 0.4 0.3 0.2 POWER LOSS 0.1 0.0 1 10 100 1000 2000 LOAD CURRENT (mA) Vin=2.5V Vin=3.3V VIN=5V VIN=5.5V POWER LOSS (W) EFFICIENCY (%) Efficiency vs. Load Current vs. Power Loss LxWxH (6.3cmx6.3cmx0.3cm) Board Number MPS IC Number EVQ2178-LE-00A MPQ2178GQHE-AEC1 EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 2 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 QUICK START GUIDE 1. Preset the power supply between 2.5V and 5.5V. 2. Connect the power supply terminals to: a. Positive (+): VIN b. Negative (-): GND 3. Connect the load terminals to: a. Positive (+): VOUT b. Negative (-): GND 4. After making connections, turn on the power supply. 5. To use the enable function, apply a digital input to the EN pin. Drive EN above 0.9V to turn the regulator on; drive EN below 0.65V to turn it off. 6. The external resistor divider sets the output voltage (VOUT). To adjust the MPQ2178’s output, set the feedback resistor (R5) to be between 10kΩ and 100kΩ. R6 can then be calculated with Equation (1): R6  R5 VOUT 1 0.6 (1) Table 1 shows the recommended resistor values for common output voltages. Table 1: Resistor Values for Common Output Voltages VOUT (V) 1.0 1.2 1.8 2.5 3.3 R5 (kΩ) 30.9 (1%) 100 (1%) 36 (1%) 51 (1%) 68 (1%) R6 (kΩ) 47 (1%) 100 (1%) 18 (1%) 16 (1%) 15 (1%) EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 3 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 EVALUATION BOARD SCHEMATIC U1 2.5V to 5.5V 2 VIN C1B C1C C1D 10μF 10μF 0.1μF 0.1μF R1 100kΩ 5 GND GND EN R3 100kΩ MPQ2178 EN FB L1 3 7 0Ω C5 R5 100kΩ 8 1.2V/2A VOUT 1µH R4 C2A C2B C2C C2D 10Ω 22μF NS 0.1μF NS GND R6 R2 100kΩ 100kΩ 1 PG 4 PG VOUT GND C1A SW VIN SS C4 NS 6 C3 2.2nF VOUT (V) R5 (kΩ) R6 (kΩ) 1.2 100 (1%) 100 (1%) 1.8 36 (1%) 18 (1%) 3.3 68 (1%) 15 (1%) Figure 1: Evaluation Board Schematic EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 4 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 EVQ2178-LE-00A BILL OF MATERIALS Qty Designator Value Description Package Manufacturer Manufacturer PN Electrolytic capacitor, SMD Jianghai VTD-63V22 63V Ceramic capacitor, 16V, 0805 Murata GCM21BR71C475KA73L X7R Ceramic capacitor, 16V, 0603 TDK C1608X7R1C104K X7R Ceramic capacitor, 6.3V, 0805 Murata GRM21BR60J226ME39L X5R Film resistor, 1% 0603 Yageo RC0603FR-070RL 1 CIN1 22µF 2 C1A, C1B 4.7µF 3 C1C, C1D, C2C 0.1µF 1 C2A 22µF 1 0 C5 C4 0Ω NS 1 C3 2.2nF Ceramic capacitor, 50V, X7R 0603 TDK C1608X7R1H222K 100kΩ Film resistor, 1% 0603 Yageo RC0603FR-07100KL Film resistor, 1% Inductor, RDC = 14.6mΩ, ISAT = 9.6A 0603 Yageo RC0603FR-0710RL SMD Coilcraft XEL4020-102MEB Test point 2.0 golden pin DIP Custom Test point 1.0 golden pin DIP Custom QFN-8 (1.5mmx 2mm) MPS 1 R1, R2, R3, R5, R6 R4 1 L1 5 4 3 1 VIN, GND, VOUT, GND EN, PG, GND U1 10Ω 1µH 5.5V, 2A, step-down MPQ2178 converter, AEC-Q100 -AEC1 qualified MPQ2178GQHE-AEC1 EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 5 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 EVB TEST RESULTS Performance curves and waveforms are tested on the evaluation board. VIN = 3.6V, VOUT = 1.2V, L = 1μH, COUT = 22µF, TA = 25°C, unless otherwise noted. Efficiency vs. Load Current vs. Power Loss 0.20 0.18 0.16 0.14 0.12 0.10 0.08 0.06 0.04 POWER LOSS 0.02 0.00 10 100 200 LOAD CURRENT (mA) 1 VOUT = 1.2V, L = 1μH, (XEL4020-102MEB, DCR = 13.25mΩ) 95 EFFICIENCY (%) EFFICIENCY EFFICIENCY 90 85 70 0.2 POWER LOSS 0.2 EFFICIENCY 95 0.25 0.20 0.15 0.10 POWER LOSS 0.05 1.0 90 0.8 85 0.6 Vin=3.3V VIN=5V VIN=5.5V VIN=3V 80 0.4 75 0.2 POWER LOSS 1 10 0.00 100 200 70 0.0 0.2 0.5 0.8 1.1 1.4 1.7 LOAD CURRENT (A) 2.0 Load Regulation VOUT = 1.2V VIN=2.5V VIN=3.3V VIN=5V VIN=5.5V 0.00 -0.05 -0.10 LOAD REGULATION (%) LOAD REGULATION (%) 0.05 0.0 2.0 EFFICIENCY Load Regulation 0.10 0.8 1.1 1.4 1.7 LOAD CURRENT (A) VOUT = 1.8V, L = 1μH, (XEL4020-102MEB, DCR = 13.25mΩ) LOAD CURRENT (mA) 0.15 0.5 Efficiency vs. Load Current vs. Power Loss EFFICIENCY (%) Vin=3.3V VIN=5V VIN=5.5V VIN=3V 0.6 0.4 65 POWER LOSS (W) EFFICIENCY (%) 100 90 80 70 60 50 40 30 20 10 0 0.8 75 Efficiency vs. Load Current vs. Power Loss VOUT = 1.8V, L = 1μH, (XEL4020-102MEB, DCR = 13.25mΩ) 1.0 Vin=2.5V Vin=3.3V VIN=5V VIN=5.5V 80 1.2 POWER LOSS (W) Vin=2.5V Vin=3.3V VIN=5V VIN=5.5V POWER LOSS (W) EFFICIENCY (%) 100 90 80 70 60 50 40 30 20 10 0 VOUT = 1.2V, L = 1μH, (XEL4020-102MEB, DCR = 13.25mΩ) POWER LOSS (W) Efficiency vs. Load Current vs. Power Loss 0.20 0.15 0.10 0.05 VOUT = 1.8V VIN=3V VIN=3.3V VIN=5V VIN=5.5V 0.00 -0.05 -0.10 -0.15 -0.20 -0.15 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 LOAD CURRENT (A) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 LOAD CURRENT (A) EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 6 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 EVB TEST RESULTS (continued) Performance curves and waveforms are tested on the evaluation board. VIN = 3.6V, VOUT = 1.2V, L = 1μH, COUT = 22µF, TA = 25°C, unless otherwise noted. Line Regulation 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 -0.05 -0.10 VOUT = 1.2V 0.5 IOUT=0.1A IOUT=1A IOUT=2A LINE REGULATION (%) LINE REGULATION (%) Line Regulation VOUT = 1.8V 0.4 0.3 0.2 0.1 0.0 IOUT=0.1A IOUT=1A IOUT=2A -0.1 -0.2 2.5 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) 5.5 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE(V) EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 5.5 7 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 EVB TEST RESULTS (continued) Performance curves and waveforms are tested on the evaluation board. VIN = 3.6V, VOUT = 1.2V, L = 1μH, COUT = 22µF, TA = 25°C, unless otherwise noted. Steady State Steady State IOUT = 0A IOUT = 2A CH3: VIN 1V/div. CH2: VOUT/AC 5mV/div. CH2: VOUT/AC 5mV/div. CH3: VIN 1V/div. CH4: IL 500mA/div. CH4: IL 200mA/div. CH1: SW 2V/div. CH1: SW 2V/div. 400ns/div. 400ns/div. Start-Up through VIN Start-Up through VIN IOUT = 0A IOUT = 2A CH3: VIN 2V/div. CH3: VIN 2V/div. CH2: VOUT 1V/div. CH4: IL 500mA/div. CH2: VOUT 1V/div. CH4: IL 1A/div. CH1: SW 2V/div. CH1: SW 2V/div. 1ms/div. 1ms/div. Shutdown through VIN Shutdown through VIN IOUT = 0A IOUT = 2A CH3: VIN 2V/div. CH2: VOUT 1V/div. CH3: VIN 2V/div. CH2: VOUT 1V/div. CH4: IL 500mA/div. CH4: IL 1A/div. CH1: SW 2V/div. CH1: SW 2V/div. 10ms/div. 4ms/div. EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 8 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 EVB TEST RESULTS (continued) Performance curves and waveforms are tested on the evaluation board. VIN = 3.6V, VOUT = 1.2V, L = 1μH, COUT = 22µF, TA = 25°C, unless otherwise noted. Start-Up through EN Start-Up through EN IOUT = 0A IOUT = 2A CH3: EN 3V/div. CH3: EN 3V/div. CH2: VOUT 1V/div. CH4: IL 500mA/div. CH2: VOUT 1V/div. CH4: IL 1A/div. CH1: SW 2V/div. CH1: SW 2V/div. 1ms/div. 1ms/div. Shutdown through EN Shutdown through EN IOUT = 0A IOUT = 2A CH3: EN 3V/div. CH3: EN 3V/div. CH2: VOUT 1V/div. CH2: VOUT 1V/div. CH4: IL 500mA/div. CH4: IL 1A/div. CH1: SW 2V/div. CH1: SW 2V/div. 2ms/div. 20µs/div. SCP Entry SCP Entry IOUT = 0A IOUT = 2A CH3: PG 2V/div. CH2: VOUT 1V/div. CH3: PG 2V/div. CH2: VOUT 1V/div. CH4: IL 2A/div. CH4: IL 2A/div. CH1: SW 2V/div. CH1: SW 2V/div. 400µs/div. 400µs/div. EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 9 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 EVB TEST RESULTS (continued) Performance curves and waveforms are tested on the evaluation board. VIN = 3.6V, VOUT = 1.2V, L = 1μH, COUT = 22µF, TA = 25°C, unless otherwise noted. SCP Recovery SCP Recovery IOUT = 0A IOUT = 2A CH2: VOUT 1V/div. CH2: VOUT 1V/div. CH3: PG 2V/div. CH3: PG 2V/div. CH4: IL 2A/div. CH4: IL 2A/div. CH1: SW 2V/div. CH1: SW 2V/div. 400µs/div. 400µs/div. PG in Start-Up through VIN Short Circuit IOUT = 2A CH2: VOUT 1V/div. CH3: PG 2V/div. CH3: VIN 2V/div. CH2: VOUT 1V/div. CH4: IL 2A/div. CH4: PG 2V/div. CH1: SW 2V/div. CH1: SW 2V/div. 200µs/div. 1ms/div. PG in Shutdown through VIN PG in Start-Up through EN IOUT = 2A IOUT = 2A CH3: EN 3V/div. CH3: VIN 2V/div. CH2: VOUT 1V/div. CH2: VOUT 1V/div. CH4: PG 2V/div. CH4: PG 2V/div. CH1: SW 2V/div. CH1: SW 2V/div. 4ms/div. 1ms/div. EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 10 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 EVB TEST RESULTS (continued) Performance curves and waveforms are tested on the evaluation board. VIN = 3.6V, VOUT = 1.2V, L = 1μH, COUT = 22µF, TA = 25°C, unless otherwise noted. PG in Shutdown through EN Load Transient IOUT = 2A IOUT = 1A to 2A, 1A/µs CH3: EN 3V/div. CH2: VOUT/AC 50mV/div. CH2: VOUT 1V/div. CH4: PG 2V/div. CH4: IOUT 2A/div. CH1: SW 2V/div. CH1: SW 2V/div. 40µs/div. 80µs/div. EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 11 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 PCB LAYOUT Figure 2: Top Silk and Top Layer Figure 3: Mid-Layer 1 Figure 4: Mid-Layer 2 Figure 5: Bottom Layer and Bottom Silk EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 12 EVQ2178-LE-00A – 5.5V, 2A, STEP-DOWN CONVERTER EVAL BOARD, AEC-Q100 REVISION HISTORY Revision # 1.0 Revision Date 09/29/2021 Description Initial Release Pages Updated - 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. EVQ2178-LE-00A Rev. 1.0 MonolithicPower.com 9/29/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 13