MP8868GLE-Z

MP8868 High-Efficiency, 10A, 17V, Synchronous Step-Down Converter with I2C Interface The Future of Analog IC Technology DESCRIPTION FEATURES The MP8868 is a high-frequency, synchronous, rectified, stepdown, switch-mode converter with an I2C control interface. Its fully integrated solution achieves a 10A output current with excellent load and line regulation over a wide input-supply range. • • • • Wide 4.5V-to-17V Operating Input Range 1% Internal Reference Accuracy I2C Programmable Reference Output Voltage Range from 0.6V to 1.87V in 10mV Steps with Slew Rate Control I2C Selectable Switching Frequency 200kHz-2MHz Synchronized External Clock OTP, OCP Hiccup Indication Via I2C Selectable PSM and Fs Through I2C Programmable Soft-Start Time Open-Drain Power Good Indicator Small 3x4mm QFN14 Package The reference voltage level is controlled on-thefly by the I2C serial interface with the reference voltage range adjustable from 0.6V to 1.87V in 10mV steps. In addition, the voltage scaling slew rate, the switching frequency, enable, and power-save mode are selectable through the I2C interface. • • • • • • • Current-mode operation provides fast transient response and eases loop stabilization. EN/SYNC supports external clock synchronization, and an open-drain power good pin indicates when the output voltage is in the nominal range. Full protection features include: APPLICATIONS • • • 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. Over-voltage protection (OVP) Hiccup over-current protection (OCP) Thermal shutdown • • • • SoC and Media Processors FPGA-based Systems ASIC Supplies Distributed Power Systems The MP8868 requires a minimal number of readily available, standard, external components, and it is available in a QFN-14 (3x4mm) package. TYPICAL APPLICATION 100 90 80 70 60 50 40 30 0.01 MP8868 Rev.1.1 5/15/2015 0.10 1.00 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 10.00 1 MP8868 – SYNCHRONOUS STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* MP8868GLE Package QFN-14 (3mmx4mm) Top Marking See Below * For Tape & Reel, add suffix –Z (e.g. MP8868GLE–Z); TOP MARKING MP: MPS prefix: Y: year code; W: week code: 8868: first four digits of the part number; LLL: lot number; E: product code; PACKAGE REFERENCE QFN-14 (3mmx4mm) MP8868 Rev.1.1 5/15/2015 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 2 MP8868 – SYNCHRONOUS STEP-DOWN CONVERTER ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance VIN …………………………….. ........-0.3V to 19V VSW………………………………… -0.3V (-6V for 20 vias close to the part for a better thermal performance 3 10 L1 SCL SDA EN/ SYNC A0 PG 3 4 5 6 7 --Top Layer --Inner PGND Layer --Inner Layer2 --Bottom Vin Layer VOUT --Bottom Layer C2 --Via PGND --Via For AGND Figure 11: Recommend Layout MP8868 Rev.1.1 5/15/2015 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 23 MP8868 – SYNCHRONOUS STEP-DOWN CONVERTER Design Example Below is a design example following the application guidelines for the specifications: Table 3 Design Example VIN VOUT IO 12V 1V 10A The detailed application schematics are shown in Figure 13. The typical performance and circuit waveforms have been shown in the Typical Performance Characteristics section. For more device applications, please refer to the related Evaluation Board Datasheets. MP8868 Rev.1.1 5/15/2015 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 24 MP8868 – SYNCHRONOUS STEP-DOWN CONVERTER TYPICAL APPLICATION CIRCUITS (13) Figure 12: VIN=4.5-17V, VOUT=0.9V, IOUT=10A Figure 13: VIN=4.5-17V, VOUT=1V, IOUT=10A Figure 14: VIN=4.5-17V, VOUT=1.2V, IOUT=10A Notes: 13) All circuits are basing on 0.6V default reference voltage. MP8868 Rev.1.1 5/15/2015 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 25 MP8868 – SYNCHRONOUS STEP-DOWN CONVERTER Figure 15: VIN=4.5-17V, VOUT=2.5V, IOUT=10A Figure 16: VIN=6-17V, VOUT=3.3V, IOUT=10A(14) R5 0Ω VIN 1 8V-17V C1 22µF 9 C1A 22µF C1B 0.1µF 5 13 C3 0.47μF EN PG SDA SCL A0 C5 0.1µF SW VCC VOUT C2 22µF VOUT 10 FB 11 SS 12 C2A 22µF C2B 22µF C2C 22µF MP8868 7 PG 4 SDA SCL A0 6 5V/10A 2 EN/SYNC R4 100kΩ 3 L1 3.3µH BST VIN AGND 14 R3 20kΩ R1 60.4kΩ C6 33pF R2 8.25kΩ PGND 8 C4 22nF Figure 17: VIN=8-17V, VOUT=5V, IOUT=10A(14) Notes: 14) Basing on Evaluation Board test result at 25℃ ambient temperature, lower input voltage will trigger over temperature protection with full load. MP8868 Rev.1.1 5/15/2015 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 26 MP8868 – SYNCHRONOUS STEP-DOWN CONVERTER PACKAGE INFORMATION QFN14 (3x4mm) NOTICE: The information in this document is subject to change without notice. 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. MP8868 Rev.1.1 5/15/2015 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2015 MPS. All Rights Reserved. 27