EVQ4572-QB-00A 60V, 2A, High-Efficiency, Synchronous Buck Converter Evaluation Board DESCRIPTION FEATURES The EVQ4572-QB-00A evaluation board is Wide 5V to 60V Operating Input Range designed to demonstrate the capabilities of the 2A Continuous Output Current MPQ4572/MPQ4572-AEC1. High-Efficiency Synchronous Mode Control 250m/45m Internal Power MOSFETs The MPQ4572/MPQ4572-AEC1 is a fully Configurable Frequency Up to 2.2MHz integrated, fixed-frequency, synchronous step- 180 Out-of-Phase SYNCO Clock down converter. It can achieve up to 2A of 40A Quiescent Current continuous output current with peak current Low Shutdown Mode Current: 2A control for excellent transient response. Selectable AAM or Forced CCM Operation The MPQ4572/MPQ4572-AEC1 employs under Light-Load Conditions advanced asynchronous mode (AAM) which Internal 0.45ms Soft Start helps to achieve high efficiency under light-load Remote EN Control conditions by scaling down the switching Power Good Indicator frequency to reduce the switching and gate Low-Dropout Mode driving losses. Over-Current Protection (OCP) The EVQ4572-QB-00A is a fully assembled and Thermal Shutdown tested evaluation board. It generates a 5V Available in a QFN-12 (2.5mmx3mm) output voltage and load currents up to 2A from Package a 5V to 60V input range. Available in AEC-Q100 Grade 1 ELECTRICAL SPECIFICATIONS APPLICATIONS Parameter Symbol Value Units Automotive Systems Input voltage VEMI 5 to 60 V Industrial Power Systems Output voltage VOUT 5 V All MPS parts are lead-free, halogen-free, and adhere to the RoHS Output current IOUT 2 A 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. EVQ4572-L-00A EVALUATION BOARD Efficiency vs. Load Current vs. Power Loss VOUT = 5V, fSW = 400kHz, L = 15H, AAM 100 1.60 VIN=8V VIN=12V VIN=24V 90 1.40 VIN=36V VIN=48V VIN=60V 80 1.20 70 1.00 60 0.80 50 0.60 40 0.40 (LxWxH) 8.3cmx8.3cmx1.3cm 30 0.20 20 0.00 Board Number MPS IC Number 1 10 100 1000 EVQ4572-QB-00A MPQ4572GQB-AEC1 LOAD CURRENT (mA) EVQ4572-QB-00A Rev. 1.1 MonolithicPower.com 1 4/29/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved. EFFICIENCY (%) POWER LOSS (W)EVQ4572-QB-00A 60V/2A BUCK CONVERTER EVALUATION BOARD QUICK START GUIDE 1. Preset the power supply (V ) between to 5V and 60V. IN Electronic loads represent a negative impedance to the regulator. If the current is too high, hiccup mode will be triggered. 2. Turn the power supply off. If longer cables are used between the source and the EVB (>0.5m total), install a damping capacitor at the input terminals. This is especially critical when V exceeds 24V. IN 3. Connect the power supply terminals to: a) Positive (+): VEMI b) Negative (-): GND 4. Connect the load 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 1.45V to turn the regulator on drive EN below 1.12V to turn it off. 7. The oscillating frequency of the MPQ4572/MPQ4572-AEC1 can be configured with an external frequency resistor (R ). R can be estimated with Equation (1): FREQ FREQ 30 R (M) (1) FREQ fSW (kHz) The calculated resistance may need fine-tuning via bench testing. 8. The output voltage is set by the external resistor divider. The feedback resistor (R6 + R4) also sets the feedback loop bandwidth with the internal compensation capacitor. Choose R4 to be around 40k. Then R5 can be calculated with Equation (2): MPQ4572 R6 R4 5 FB V OUT R5 (2) R4 R5 V OUT 1 0.8 Table 1 lists the recommended feedback resistor values for common output voltages. Table 1: Feedback Resistors for Output Voltages V (V) R4 (k) R5 (k ) R6 (k ) OUT 3.3 41.2 (1%) 13 (1%) 20 (1%) 5 41.2 (1%) 7.68 (1%) 20 (1%) 12 41.2 (1%) 2.94 (1%) 20 (1%) 9. JP3 and JP4 can be used to add external shielding above the inductor and IC. JP3 and JP4 are not stuffed by default. EVQ4572-QB-00A Rev. 1.1 MonolithicPower.com 2 4/29/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved.