EVQ4431-L-00A

EVQ4431-L-00A 36V, 1A, Low Quiescent Current, Synchronous Step-Down Converter Evaluation Board DESCRIPTION FEATURES The EVQ4431-L-00A evaluation board is designed to demonstrate the capabilities of the MP4431 and the MPQ4431.  The MPQ4431 is a frequency-configurable (350kHz to 2.5MHz), synchronous, step-down switching regulator with integrated, internal high-side and low-side power MOSFETs. It provides up to 1A of highly efficient output current with current mode control for fast loop response. The MPQ4431 employs advanced asynchronous mode (AAM) to achieve high efficiency under light-load conditions by scaling down the switching frequency. This reduces the switching and gate driving losses. The EVQ4431-L-00A is a fully assembled and tested evaluation board, it generates 3.3V of output voltage at load currents up to 1A from a 3.3V to 36V input voltage range with 450kHz switching frequency.               Wide 3.3V to 36V Operating Input Voltage Range 1A of Continuous Output Current 1μA Low Shutdown Mode Current 10μA Sleep Mode Quiescent Current Internal 90mΩ High-Side and 80mΩ LowSide MOSFETs 350kHz to 2.5MHz Configurable Switching Frequency Synchronize to External Clock, Selectable In-Phase or 180° Out-of-Phase Power Good Indicator Configurable Soft-Start Time 80ns Minimum On Time Selectable FCCM and AAM Low-Dropout Mode Over-Current Protection with Valley Current Detection and Hiccup Mode Thermal Shutdown Available in a QFN-16 (3mmx4mm) Package Available with Wettable Flanks AEC-Q100 Grade 1 The MPQ4431 is available in a QFN-16 (3mmx4mm) package.   ELECTRICAL SPECIFICATIONS APPLICATIONS Parameter   Input voltage Output voltage Output current Symbol Value Units VEMI VOUT IOUT 3.3 to 36 3.3 1 V V A Automotive Systems Industrial 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. EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 1 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD EVQ4431-L-00A EVALUATION BOARD Efficiency vs. Load Current VOUT = 3.3V, AAM EFFICIENCY LxWxH (8.9cmx8.9cmx2cm) Board Number MPS IC Number EVQ4431-L-00A MP4431GL, MPQ4431GL VIN=8V VIN=12V VIN=24V VIN=36V 0.1 1 10 100 LOAD CURRENT (mA) 0.42 0.36 0.30 0.24 0.18 0.12 0.06 Power Loss (W) 0.60 0.54 0.48 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% 45% 40% 35% 30% 25% 20% 0.00 1000 EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 2 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD QUICK START GUIDE 1. Preset the power supply (VIN) to be between 3.3V and 36V. Note that electronic loads represent a negative impedance to the regulator. If the current is set too high, hiccup mode may be triggered. 2. Turn the power supply off. If longer cables (>0.5m total) are used between the source and the evaluation board, a damping capacitor should be installed at the input terminals, especially if VIN ≥ 24V. 3. Connect the power supply terminals to: a. Positive (+): VEMI b. Negative (-): GND 4. Connect the load terminals to: a. Positive (+): VOUT b. Negative (-): GND 5. Turn the power supply on after making the connections. 6. To use the enable function, apply a digital input to the EN pin. Drive EN above 1.05V to turn the device on; drive EN below 0.93V to turn it off. 7. The IC’s oscillating frequency can be configured by an external frequency resistor (RFREQ). RFREQ can be estimated with Equation (1): RFREQ (kΩ)  170000 fSW 1.11(kHz) (1) 8. To use the sync function, apply a 350kHz to 2.5MHz clock to the SYNC pin to synchronize the internal oscillator frequency to the external clock. The external clock should be at least 250kHz above the frequency set by RFREQ. The SYNC pin can also select forced continuous conduction mode (FCCM) or advanced asynchronous mode (AAM). Drive SYNC high before the chip starts up to choose FCCM; drive SYNC low (or leave it floating) to select AAM. 9. 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. For different output voltages, RFB1 and RFB2 can be calculated with Equation (2): R FB2  R FB1 VOUT 1 0.8V (2) Figure 1 shows the resistor divider set-up. MP/MPQ4431 FB RFB1 VOUT RFB2 Figure 1: Resistor Divider Set-Up EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 3 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD Table 1 lists the recommended feedback resistor values for common output voltages. Table 1: Recommended Resistor Dividers VOUT (V) 1.8 RFB1 (kΩ) 41.2 (1%) RFB2 (kΩ) 33 (1%) 2.5 41.2 (1%) 19.6 (1%) 3.3 41.2 (1%) 13 (1%) 5 12 41.2 (1%) 41.2 (1%) 7.68 (1%) 2.94 (1%) EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 4 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD EVALUATION BOARD SCHEMATIC R5 for EMC R5 VEMI CIN1 NS GND CIN2 NS CIN3 NS CIN4 NS CIN5 1µF 0805 50V CIN6 NS L2 4.7µH CIN7 CIN8 4.7µF 4.7µF 1210 1210 50V 50V CIN9 22µF 63V C1A 10µF C1B 10µF 1210 50V 1210 50V Input EMI Filter U1 C1C 0.1µF 0603 50V C1D 0.1µF 0603 50V 2 IN BST SW C4 0.1µF 3, 10 MPQ4431GL 5 0.12 V Hyst R8 13kΩ 6 SYNC BIAS 8 82kΩ 1MHz 36.5kΩ 2MHz 31.6kΩ 2.2MHz 27kΩ 2.5MHz Freq = 450kHz R4 191kΩ 16 FRE Q PG PGND 500kHz 14 SS C3 4.7nF AGND 350kHz 169kΩ C7 0.1µF 7 High if VOUT within ±10% C2A 22µF 1210 25V C2B 22µF C2C 1210 NS 25V VOUT GND R3 10Ω VOUT (V) R7 (kΩ) R8 (kΩ) 1.8 41.2 (1%) 33 (1%) 2.5 41.2 (1%) 19.6 (1%) 3.3 41.2 (1%) 13 (1%) 5 41.2 (1%) 7.68 (1%) 12 41.2 (1%) 2.94 (1%) PG R6 100kΩ VCC 13 249kΩ C5 10pF Connect to 5V to 18V or float if not used 1 PHASE 4, 9 fSW 3.3V/1A R7 40.2kΩ FB 15 EN R2 NS SYNC R4 L3 10µH R1 100kΩ 1.05V EN 20Ω 11 L1 1µH 3.3V to 36V CIN9 is for damping the input C and L 12 C6 1µF SS float: 700μs CSS = 4.7nF: 700μs 10nF: 1.1ms 22nF: 2.42ms tSS = CSS (nF) x 0.11ms Figure 2: Evaluation Board Schematic PACKAGE REFERENCE FREQ FB SS AGND 16 15 14 13 PHASE 1 12 VCC VIN 2 11 BST SW 3 10 SW 4 9 PGND 5 6 7 8 EN SYNC PG BIAS PGND QFN-16 (3mmx4mm) EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 5 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD EVQ4431-L-00A BILL OF MATERIALS Qty Ref Value 1 CIN5 1μF 1 CIN7, CIN8, C1A, C1B CIN9 2 C1C, C1D 0.1μF 2 C2A, C2B 22μF 1 C3 4.7nF 2 C4, C7 0.1μF 1 C5 10pF 1 C6 1μF 6 CIN1, CIN2, CIN3, CIN4, CIN6, C2C NS 1 L1 1μH 1 L2 4.7μH 1 L3 10μH 2 1 1 1 1 1 1 1 1 R1, R6 R3 R4 R5 R7 R8 R10 R12 R2 100kΩ 10Ω 191kΩ 20Ω 41.2kΩ 13kΩ 1kΩ 11kΩ NS 1 U1 4 4 5 4.7μF 22μF Description Ceramic capacitor, 50V, X7R Ceramic capacitor, 50V, X7S Electrolytic capacitor, 63V Ceramic capacitor, 50V, X7R Ceramic capacitor, 16V, X7R Ceramic capacitor, 50V, X7R Ceramic capacitor, 16V, X7R Ceramic capacitor, 50V, C0G Ceramic capacitor, 16V, X7R Inductor, DCR = 41mΩ, 3.1A Inductor, DCR = 165mΩ, 1.7A Inductor, DCR = 48.6mΩ, 3.7A Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% Film resistor, 1% MPQ4431 Step-down converter VEMI, GND, Test point 2.0 golden pin VOUT, GND EN, GND, SYNC, Test point 1.0 golden pin GND, PG Package Manufacture Manufacturer P/N 0805 Murata 0805 Murata SMD Jianghai 0603 Murata 1210 Murata 0603 Murata 0603 Murata 0603 Murata GRM1885C1H100JA01 0603 Murata GRM188R71C105KA12 D SMD Cyntec SMD Cyntec SMD Cyntec VCHA042A-100MS6-89 0603 0603 0603 0603 0603 0603 0603 0603 Yageo Yageo Yageo Yageo Yageo Yageo Yageo Yageo RC0603FR-07100KL RC0603FR-0710RL RC0603FR-07191KL RC0603FR-0720RL RC0603FR-0741K2L RC0603FR-0713KL RC0603FR-071KL RC0603FR-0711KL QFN-16 (3mmx 4mm) MPS MPQ4431GL DIP Any DIP Any GRM21BR71H105KA12 L GRM21BR71H475KE11 L VTD-63V22 GRM188R71H104KA93 D GRM32ER71C226KEA8 L GRM188R71H472KA01 D GRM188R71C104KA01 D VCTA20161B-1R0MS689 VCTA25201B-4R7MS689 EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 6 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD EVB TEST RESULTS Efficiency vs. Load Current Efficiency vs. Load Current VOUT = 3.3V, AAM VOUT = 3.3V, CCM 0.1 1 10 100 LOAD CURRENT (mA) 0.06 0.00 1000 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% VIN=8V VIN=12V VIN=24V VIN=36V EFFICIENCY EFFICIENCY VIN=8V VIN=12V VIN=24V VIN=36V 0.36 0.30 0.24 0.18 0.12 Power Loss (W) 0.60 0.54 0.48 0.42 100% 95% 90% 85% 80% 75% 70% 65% 60% 55% 50% 45% 40% 35% 30% 25% 20% 1 10 100 LOAD CURRENT (mA) EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 0.60 0.54 0.48 0.42 0.36 0.30 0.24 0.18 0.12 0.06 0.00 1000 Power Loww(W) Performance curves and waveforms are tested on the evaluation board. VIN = 12V, VOUT = 3.3V, L = 10µH, fSW = 450kHz, TA = 25°C, unless otherwise noted. 7 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD EVB TEST RESULTS (continued) Performance curves and waveforms are tested on the evaluation board. VIN = 12V, VOUT = 3.3V, L = 10µH, fSW = 450kHz, TA = 25°C, unless otherwise noted. Steady State Steady State VIN = 12V, VOUT = 3.3V, IOUT = 0A, AAM VIN = 12V, VOUT = 3.3V, IOUT = 0A, CCM CH3: VPG CH3: VPG CH1: VSW CH1: VSW CH2: CH2: VOUT/AC H4: IL VOUT/AC CH4: IL Steady State Start-Up VIN = 12V, VOUT = 3.3V, IOUT = 1A VIN = 12V, VOUT = 3.3V, IOUT = 0A, AAM CH3: VPG CH3: VIN CH1: VSW CH1: VSW CH2: VOUT/AC CH2: VOUT CH4: IL CH4: IL Start-Up Start-Up VIN = 12V, VOUT = 3.3V, IOUT = 0A, CCM VIN = 12V, VOUT = 3.3V, IOUT = 1A CH3: VIN CH3: VIN CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 8 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD EVB TEST RESULTS (continued) Performance curves and waveforms are tested on the evaluation board. VIN = 12V, VOUT = 3.3V, L = 10µH, fSW = 450kHz, TA = 25°C, unless otherwise noted. Shutdown Shutdown VIN = 12V, VOUT = 3.3V, IOUT = 0A, AAM VIN = 12V, VOUT = 3.3V, IOUT = 0A, CCM CH3: VIN CH3: VIN CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL Shutdown EN On VIN = 12V, VOUT = 3.3V, IOUT = 1A VIN = 12V, VOUT = 3.3V, IOUT = 0A, AAM CH3: VEN CH3: VIN CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL EN On EN On VIN = 12V, VOUT = 3.3V, IOUT = 0A, CCM VIN = 12V, VOUT = 5V, IOUT = 1A CH3: VEN CH3: VEN CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 9 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD EVB TEST RESULTS (continued) Performance curves and waveforms are tested on the evaluation board. VIN = 12V, VOUT = 3.3V, L = 10µH, fSW = 450kHz, TA = 25°C, unless otherwise noted. EN Off EN Off VIN = 12V, VOUT = 3.3V, IOUT = 0A, AAM VIN = 12V, VOUT = 3.3V, IOUT = 0A, CCM CH3: VEN CH3: VEN CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL EN Off SCP Entry VIN = 12V, VOUT = 3.3V, IOUT = 1A VIN = 12V, VOUT = 3.3V, IOUT = 0A, AAM CH3: VEN CH3: VPG CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL SCP Entry SCP Entry VIN = 12V, VOUT = 3.3V, IOUT = 0A, CCM VIN = 12V, VOUT = 3.3V, IOUT = 1A CH3: VPG CH3: VPG CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 10 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD EVB TEST RESULTS (continued) Performance curves and waveforms are tested on the evaluation board. VIN = 12V, VOUT = 3.3V, L = 10µH, fSW = 450kHz, TA = 25°C, unless otherwise noted. SCP Steady State SCP Recovery VIN = 12V VIN = 12V, VOUT = 3.3V, IOUT = 0A, AAM CH3: VPG CH3: VPG CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL SCP Recovery SCP Recovery VIN = 12V, VOUT = 3.3V, IOUT = 0A, CCM VIN = 12V, VOUT = 3.3V, IOUT = 1A CH3: VPG CH3: VPG CH1: VSW CH1: VSW CH2: VOUT CH2: VOUT CH4: IL CH4: IL Load Transient Cold-Crank Conditions VIN = 12V, VOUT = 3.3V, Iout = 0.5A-1A VIN = 12V to 3.3V to 5V, IOUT = 0A, AAM CH2: VOUT/AC CH3: VIN CH1: VSW CH4: IOUT CH2: VOUT CH4: IL EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 11 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD EVB TEST RESULTS (continued) Performance curves and waveforms are tested on the evaluation board. VIN = 12V, VOUT = 3.3V, L = 10µH, fSW = 450kHz, TA = 25°C, unless otherwise noted. VIN Ramp Down and Up Cold-Crank Conditions VIN = 18V to 3.3V to 0V to 3.3V to 18V, IOUT = 0A, AAM VIN = 12V to 3.3V to 5V, IOUT = 1A CH3: VIN CH3: VIN CH1: VSW CH1: VSW CH2: VOUT CH4: IL CH2: VOUT CH4: IL VIN Ramp Down and Up Load Dump VIN = 18V to 3.3V to 0V to 3.3V to 18V, IOUT = 1A CH3: VIN CH1: VSW VIN = 12V to 36V to 12V, IOUT = 1A CH3: VIN CH1: VSW CH2: VOUT CH4: IL CH4: IL CH2: VOUT EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 12 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION 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 EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 13 EVQ4431-L-00A – 36V, 1A, STEP-DOWN CONVERTER EVALUATION BOARD REVISION HISTORY Revision # 1.0 Revision Date 5/27/2021 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. EVQ4431-L-00A Rev. 1.0 MonolithicPower.com 5/27/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 14