DATASHEET ISL1801 FN8259 Rev 1.00 sPMIC for Micro Converter Bias and Drivers July 24, 2014 The ISL1801 is a power management IC (PMIC) optimized for Features solar array micro converters and other systems operating from 90V input buck switching regulator a high voltage DC supply. The ISL1801 can be used in buck, boost or buck-boost microconverter topologies in order to - 120mA (minimum) output with OCP, OVP, OTP maximize the energy harvest from a solar array. In addition to - Integrated upper and lower MOSFETs the power stage and main controller, the ISL1801 includes the 90V on-chip start-up 6.7V LDO bias regulators, gate drivers, current sense amplifier and comparators needed for micro converters. Low voltage buck switching regulator - 200mA (minimum) output with OCP, OVP The ISL1801 integrates two switching regulators that can be - Integrated upper and lower MOSFETs used to generate the driver and the micro-controller (MCU) power supplies. In addition, it has a low offset, low drift -PGOOD output amplifier for current sensing, two comparators for overvoltage Low voltage bias LDO and overcurrent protection plus a watchdog timer to reset the - Input voltage range from 6V to 14V MCU if necessary. This single IC solution offers high integration and dramatically reduces the total number of components in - Regulated 5V output up to 10mA the microconverter system improving the system reliability and Dual high-speed gate driver reducing cost. -14V voltage rating The first regulator takes input voltages ranging from 9V to 90V - 2A peak sourcing and 5A peak sinking current from the solar panel and outputs a regulated supply for drivers - Peak current limit for DRIVE3 and the secondary regulator. The secondary regulator converts the output of the first regulator to a programmable Dedicated amplifier for accurate current sense micro-controller supply, typically 3.3V. A high voltage start-up Two comparators for general purpose protection LDO provides the necessary bias voltage until the switching Integrated watchdog timer regulator is operating. The ISL1801 integrates two high-speed MOSFET drivers for Applications buck, flyback or boost converters configured as shown in the Solar power optimizer application schematics. The Drive3 also has the integrated peak current limiting capabilities. Solar power micro-inverter Solar charge controller The ISL1801 includes comprehensive start-up, shutdown and fault logic to ensure reliable operation of micro converters in Telecom power supply solar applications. PV MODULE V + V + IN OUT SENSE V - OUT ISL1801 3.3V CONTROL PROCESSOR AND/OR COMMUNICATIONS FIGURE 1. TYPICAL APPLICATION FN8259 Rev 1.00 Page 1 of 30 July 24, 2014ISL1801 Table of Contents Block Diagram 3 Pin Configuration 4 Ordering Information 6 Absolute Maximum Ratings . 7 Thermal Information . 7 Recommended Operating Conditions 7 High Voltage 10V Bias Regulator VR1 Electrical Specifications 7 Low Voltage 3.3V Bias Regulator VR2 Electrical Specifications 8 Driver Electrical Specifications 9 WatchDog Timer Electrical Specifications . 10 Current Sense Op amp Electrical Specifications 10 Dual High-Speed Comparator Electrical Specifications 11 Preload Electrical Specifications . 11 Typical Performance Curves . 12 Test Waveforms 14 Summary of Operation 16 Detailed Operation . 17 Dual Synchronous Buck Switching Regulators With Constant On Time Control 17 Dual LDO Bias Supplies 18 Dual Low-Side MOSFET Drivers 18 Dual High-Speed Comparator . 19 Precision Amplifier 19 Preload Operation . 20 WatchDog Timer 20 Power-Up Sequence 22 Power-Down Sequence . 23 Over-Temperature Protection 23 Overvoltage Protection . 23 Applications Information 24 Application Circuits . 24 PC Board Layout Guidelines 27 Layout Procedure 28 Revision History 29 About Intersil 29 Package Outline Drawing 30 FN8259 Rev 1.00 Page 2 of 30 July 24, 2014