Si88x4x Data Sheet Quad Digital Isolators with DC-DC Converter KEY FEATURES The Si88xx integrates Silicon Labs proven digital isolator technology with an on-chip isolated dc-dc converter that provides regulated output voltages of 3.3 or 5.0 V (or >5 High-speed isolators with integrated dc-dc converter V with external components) at peak output power levels of up to 5 W. These devices provide up to four digital channels. The dc-dc converter has user-adjustable frequency Fully-integrated secondary sensing feedback-controlled converter with for minimizing emissions, a soft-start function for safety, a shut-down option and loop dithering for low EMI compensation. The device requires only minimal passive components and a miniature transformer. dc-dc converter peak efficiency of 83% with external power switch The ultra-low-power digital isolation channels offer substantial data rate, propagation Up to 5 W isolated power with external delay, size and reliability advantages over legacy isolation technologies. Data rates up power switch to 100 Mbps max are supported, and all devices achieve propagation delays of only 23 Options include dc-dc shutdown, frequency ns max. Ordering options include a choice of dc-dc converter features, isolation channel control, and soft start configurations and a failsafe mode. All products are certified by UL, CSA, VDE, and Standard Voltage Conversion CQC. 3/5 V to isolated 3/5 V 24 V to isolated 3/5 V supported Automotive Grade is available for certain part numbers. These products are built using automotive-specific flows at all steps in the manufacturing process to ensure the robust- Precise timing on digital isolators ness and low defectivity required for automotive applications. 0100 Mbps 18 ns typical prop delay Industrial Applications Automotive Applications Highly-reliable: 100 year lifetime Industrial automation systems Hybrid electric and electric vehicles High electromagnetic immunity and ultra- low emissions Medical electronics Traction inverters RoHS compliant packages Isolated switch mode supplies Battery management systems SOIC-20 wide body Inverters Vehicle communication busses SOIC-24 wide body Data Acquisition Isolation of up to 5000 V RMS Motor control High transient immunity of 100 kV/s PLCs, distributed control systems (typical) AEC-Q100 qualified Wide temp range: -40 to +125C Safety Regulatory Approvals Automotive-grade OPNs available AIAG compliant PPAP documentation UL 1577 recognized VDE certification conformity support Up to 5000 Vrms for 1 minute VDE0884-10, EN62368-1 IMDS and CAMDS listing support CSA approval CQC certification approval IEC 60950-1, 62638-1 GB4943.1-2011 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 1 Rev. 1.06 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice July 26, 2021 1Table of Contents 1. Feature List................................4 2. Ordering Guide ..............................5 3. Functional Description............................7 3.1 Theory of Operation ............................7 3.2 Digital Isolation..............................7 3.3 DC-DC Converter Application Information.....................8 3.3.1 Shutdown ..............................8 3.3.2 Soft-Start ..............................8 3.3.3 Programmable Frequency.........................8 3.3.4 External Transformer Driver........................8 3.3.5 VREGA, VREGB............................8 3.3.6 Output Voltage Control..........................8 3.3.7 Compensation.............................9 3.3.8 Thermal Protection...........................9 3.3.9 Cycle Skipping ............................9 3.3.10 Low-Voltage Configuration ........................10 3.3.11 Low-Voltage to High-Voltage Configuration...................11 3.3.12 High-Voltage to Low-Voltage Configuration ..................12 3.3.13 High-Voltage Configuration........................13 3.4 Transformer Design ............................14 4. Digital Isolator Device Operation....................... 16 4.1 Device Startup..............................16 4.2 Undervoltage Lockout ...........................16 4.3 Layout Recommendations..........................16 4.3.1 Supply Bypass ............................16 4.3.2 Output Pin Termination..........................17 4.4 Fail-Safe Operating Mode ..........................17 4.5 Typical Performance Characteristics.......................18 5. Electrical Specifications .......................... 23 5.1 Calculating Total Current Consumption......................36 6. Pin Descriptions............................. 37 7. Package Outline: 20-Pin Wide Body SOIC.................... 42 8. Land Pattern: 20-Pin SOIC ......................... 44 9. Package Outline: 24-Pin Wide Body SOIC.................... 45 10. Land Pattern: 24-Pin SOIC......................... 47 11. Top Markings.............................. 48 11.1 Si88x4x Top Marking (20-Pin Wide Body SOIC) ..................48 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 Rev. 1.06 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice July 26, 2021 2