EV8774H-Q-00A

EV8774H-Q-00A High-Efficiency, 1400kHz, 12A, 18V Step-Down Converter Evaluation Board DESCRIPTION FEATURES The EV8774H-Q-00A Evaluation Board is designed to demonstrate the capabilities of MPS’ MP8774H, a fully-integrated highfrequency, synchronous rectified, step-down, switch-mode converter with internal power MOSFETs. It offers a very compact solution to achieve a 12A continuous output current over a wide input range, with excellent load and line regulation. The MP8774H has synchronousmode operation for higher efficiency over the output current-load range.   Constant On-Time control operation provides very fast transient response and easy loop design as well as very tight output regulation. Full protection features include SCP, OCP, UVP, and thermal shutdown. The MP8774H requires a minimal number of readily-available, standard, external components and is available in a space-saving QFN-16 (3mmх3mm) package. ELECTRICAL SPECIFICATION (1) Parameter Symbol Value Units Input Voltage Output Voltage VIN VOUT 12 1 V Output Current IOUT 12 V A          Wide 3V-to-18V Operating Input Range 16mΩ/5.5mΩ Low-RDS(ON) Internal Power MOSFETs 100µA Low IQ Current High-Efficiency Synchronous-Mode Operation Pre-biased Startup Fixed 1400kHz Switching Frequency External Programmable Soft Startup Time EN and Power Good for Power Sequencing Over-Current Protection and Hiccup Thermal Shutdown Available in a QFN-16 (3mmх3mm) package APPLICATIONS      Security Camera Portable Device, XDSL Device Digital Set-Top Boxes Flat-Panel Television and Monitors General Purposes Notes: 1) For different Input/output voltage specs and different output capacitor/inductor may need change the application circuit parameters All MPS parts are lead-free, halogen 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. EV8774H-Q-00A EVALUATION BOARD Efficiency vs. Load Current VOUT=1V, L=0.33μH, DCR=1.1mΩ 100 EFFICIENCY (%) 95 90 85 80 75 VIN=3.3V 70 VIN=5V 65 Board Number MPS IC Number EV8774H-Q-00A MP8774HGQ VIN=12V 60 0 2 4 6 8 10 12 LOAD CURRENT (A) EV8774H-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 1 EV8774H-Q-00A 18V, 1400kHz, 12A, STEP-DOWN CONVERTER AGND PGND EVALUATION BOARD SCHEMATIC EV8774H-Q-00A BILL OF MATERIALS Qty Ref C1,C1A, C2,C2A, C2B,C2C C1B,C2D C3 Value Description 22μF Ceramic Cap., 25V, X5R 1 C4 1μF 1 C5 22nF 1 C6 56pF 1 1 1 1 0 1 1 1 1 R1 R2 R3 R4 R5 R6 R7 R8 L1 20k 30k 0Ω 100k NS 100k 1k 10Ω 0.33μH 1 U1 MP8774HGQ 6 3 0.1μF Ceramic Cap., 25V, X7R Ceramic Cap., 25V, X7R Ceramic Cap., 16V, X7R Ceramic Cap., 50V, C0G Thick Film Res., 1% Thick Film Res., 1% Thick Film Res., 1% Thick Film Res., 1% Thick Film Res., 1% Thick Film Res., 1% Thick Film Res., 1% Inductor,DCR=1.1mΩ Synchronous StepDown Convert Package Manufacturer Part Number 0805 muRata GRM21BR61E226ME44L 0603 muRata GRM188R71E104KA01D 0603 muRata GRM188R71E105KA12D 0603 muRata GRM188R71C223KA01D 0603 muRata GRM1885C1H560JA01D 0603 0603 0603 0603 0603 0603 0603 0603 SMD QFN-16 Yageo Yageo Yageo Yageo RC0603FR-0720KL RC0603FR-0730KL RC0603FR-070RL RC0603FR-07100KL Yageo Yageo Yageo Wurth RC0603FR-07100KL RC0603FR-071KL RC0603JR-0710RL 7443320033 (3mmх3mm) MPS MP8774HGQ EV8774H-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 2 EV8774H-Q-00A 18V, 1400kHz, 12A, STEP-DOWN CONVERTER EVB TEST RESULTS VIN = 12V, VOUT = 1V, L = 0.33µH, TA = +25°C, unless otherwise noted. Load Regulation vs. Load Current Efficiency vs. Load Current VOUT=1V, L=0.33μH, DCR=1.1mΩ VOUT=1V 0.5 100 0.4 LOAD REGULATION (%) EFFICIENCY (%) 95 90 85 80 75 VIN=5V 70 VIN=12V 65 VIN=18V 0.3 0.2 0.1 0 -0.1 -0.2 VIN=5V -0.3 VIN=12V -0.4 VIN=18V -0.5 60 0 2 4 6 8 10 12 0 LOAD CURRENT (A) 2 4 6 8 10 12 LOAD CURRENT (A) Line Regulation vs. Input Voltage   LINE REGULATION (%) 0.5 0.4 0.3 0.2 0.1 0 -0.1 -0.2 Io=0.01A -0.3 Io=6A -0.4 Io=12A -0.5 3 6 9 12 15 18 INPUT VOLTAGE (V)       EV8774H-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 3 EV8774H-Q-00A 18V, 1400kHz, 12A, STEP-DOWN CONVERTER EVB TEST RESULTS (continued) VIN = 12V, VOUT = 1V, L = 0.33µH, TA = 25°C, unless otherwise noted. Input/Output Ripple Input/Output Ripple IOUT = 0A IOUT = 0A CH1: VOUT/AC 20mV/div. CH2: VIN/AC 50mV/div. CH1: VOUT/AC 50mV/div. CH2: VIN/AC 50mV/div. CH3: VSW 10V/div. CH3: VSW 10V/div. CH4: IL 10A/div. CH4: IL 2A/div. 40ms/div. 2µs/div. Input/Output Ripple Start-Up through Input Voltage IOUT = 12A IOUT = 0A CH1: VOUT/AC 10mV/div. CH2: VIN/AC 200mV/div. CH1: VOUT 1V/div. CHR1: VPG 5V/div. CH2: VIN 10V/div. CH3: VSW 10V/div. CH3: VSW 10V/div. CH4: IL 2A/div. CH4: IL 10A/div. 1µs/div. 1ms/div. Start-Up through Input Voltage Shutdown through Input Voltage IOUT = 12A IOUT = 0A CH1: VOUT 1V/div. CHR1: VPG 5V/div. CH1: VOUT 1V/div. CHR1: VPG 5V/div. CH2: VIN 10V/div. CH3: VSW 10V/div. CH2: VIN 10V/div. CH3: VSW 10V/div. CH4: IL 10A/div. CH4: IL 10A/div. 1ms/div. 40ms/div. EV8774H-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 4 EV8774H-Q-00A 18V, 1400kHz, 12A, STEP-DOWN CONVERTER EVB TEST RESULTS (continued) VIN = 12V, VOUT = 1V, L = 0.33µH, TA = 25°C, unless otherwise noted. Shutdown through Input Voltage Start-Up through EN IOUT = 12A IOUT = 0A CH1: VOUT 1V/div. CH1: VOUT 1V/div. CHR1: VPG 5V/div. CHR1: VPG 5V/div. CH2: VEN 5V/div. CH2: VIN 10V/div. CH3: VSW 10V/div. CH3: VSW 10V/div. CH4: IL 2A/div. CH4: IL 10A/div. 4ms/div. 2ms/div. Start-Up through EN Shutdown through EN IOUT = 12A IOUT = 0A CH1: VOUT 1V/div. CHR1: VPG 5V/div. CH1: VOUT 1V/div. CHR1: VPG 5V/div. CH2: VEN 5V/div. CH3: VSW 10V/div. CH2: VEN 5V/div. CH3: VSW 5V/div. CH4: IL 2A/div. CH4: IL 10A/div. 2ms/div. 400ms/div. Shutdown through EN Short-Circuit Protection Entry IOUT = 12A IOUT = 0A CH1: VOUT 1V/div. CH1: VOUT 1V/div. CHR1: VPG 5V/div. CH2: VPG 5V/div. CH2: VEN 5V/div. CH3: VSW 10V/div. CH3: VSW 10V/div. CH4: IL 10A/div. CH4: IL 10A/div. 200µs/div. 20ms/div. EV8774H-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 5 EV8774H-Q-00A 18V, 1400kHz, 12A, STEP-DOWN CONVERTER EVB TEST RESULTS (continued) VIN = 12V, VOUT = 1V, L = 0.33µH, TA = 25°C, unless otherwise noted. Short-Circuit Protection Recovery Short-Circuit Protection Steady State IOUT = 0A Short output to GND CH1: VOUT 1V/div. CH1: VOUT 1V/div. CH2: VPG 5V/div. CH2: VPG 5V/div. CH3: VSW 10V/div. CH3: VSW 10V/div. CH4: IL 10A/div. CH4: IL 10A/div. 20ms/div. 20ms/div. Load Transient IOUT = 6 - 12A CH1: VOUT/AC 50mV/div. CH4: IL 5A/div. 200µs/div. EV8774H-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 6 EV8774H-Q-00A 18V, 1400kHz, 12A, STEP-DOWN CONVERTER PRINTED CIRCUIT BOARD LAYOUT Figure 1: Top Silk Layer Figure 2: Top Layer Figure 3: Inner Layer 1 Figure 4: Inner Layer 2 Figure 5: Bottom Layer EV8774H-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 7 EV8774H-Q-00A 18V, 1400kHz, 12A, STEP-DOWN CONVERTER QUICK START GUIDE 1. Preset Power Supply to12V. 2. Turn Power Supply off. 3. Connect Power Supply terminals to: a. Positive (+): VIN b. Negative (–): GND 4. Connect Load to: a. Positive (+): VOUT b. Negative (–): GND 5. Turn Power Supply on after making connections. The board will automatically start up. 6. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 1.4V to turn on the regulator, or less than 0.9V to turn it off. 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. EV8774H-Q-00A Rev.1.0 www.MonolithicPower.com 5/17/2019 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2019 MPS. All Rights Reserved. 8