DATASHEET ISL91211A, ISL91211B FN8922 2 Rev.3.01 Triple/Quad Output PMIC with SPI/I C Interface Mar 5, 2020 The ISL91211A is a 4-phase, three output programmable Features Power Management IC (PMIC) and the ISL91211B is a Triple output 2+1+1 phases (ISL91211A) or quad output 4-phase, four output programmable PMIC. They are single phase (ISL91211B) optimized with highly efficient synchronous buck 2.5V to 5.5V supply voltage converters capable of multiphase and single-phase operations that can deliver up to 5A per phase continuous 5A per phase output current capability output current. It features four buck controllers and has the Small solution size (for four phase design) capability to reconfigure its power stages to these controllers. This flexibility allows seamless design-in for a High efficiency (94.7% for 3.8V /1.8V ) IN OUT wide range of applications that require high output power Low I in low power mode Q and small solution size. Proprietary control scheme reduces output capacitor and ISL91211A and ISL91211B integrate low ON-resistance supports fast load transient (such as 50A/s per phase) MOSFETs and programmable PWM frequency, allowing the 0.7% system accuracy, remote voltage sensing use of very small external inductors and capacitors. They feature automatic Diode Emulation and Pulse Skipping Programmable PWM frequency from 2MHz to 6MHz modes under light-load conditions to further improve 2 I C programmable output from 0.3V to 2V efficiency and maximize battery life. The ISL91211A and ISL91211B deliver a highly robust power solution by Independent Dynamic Voltage Scaling (DVS) for each featuring a controller based on the Renesas proprietary R5 output Technology that provides tight output accuracy and load Soft-start and fault detection (UV, OV, OC, OT), regulation, ultra-fast transient response, seamless DCM/CCM short-circuit protection transitions, and requires no external compensation. 2.551mmx3.67mm 54 ball WLCSP with 0.4mm pin In addition to the standard interrupt, chip enable, and pitch watchdog reset functions, ISL91211A and ISL91211B also feature four MPIOs and three GPIOs capable of supporting Related Literature 2 SPI, I C communication protocol, and various other pin For a full list of related documents, visit our website: mode functions. ISL91211A, ISL91211B device pages Applications UG111, ISL91211AII-EV1Z Evaluation Board User Smartphones, AR/VR Glasses, Drones Guide Optical Transceiver Modules UG116, ISL91211BII-EV1Z Evaluation Board User Guide Artificial Intelligence (AI) Processors Client/Enterprise/Data Center SSD, NAS ISL91211BIIZ ISL91211BIIZ VIN VOUT1 BUCK1 PVIN A VOUT1 PH D VOUT1 5A PH D PVIN B BUCK2 VOUT2 PH B 100 RTN1 5A PVIN C VOUT2 BUCK3 VOUT3 PVIN D PH A VOUT2 95 5A PH B AVIN VIO VOUT4 BUCK4 PH C RTN2 VIO 90 5A SCL/SDA VOUT3 3 ISL91211AIIZ GPIO<2:0> VOUT3 Test Cconditions: PH A 85 PH D 4 L = 560nH (4020 Size) MPIO<3:0> VOUT1 RTN3 BUCK1 CCM Fs = 2MHz 10A INT PH C 80 T = +25C VOUT4 A VOUT4 EN PH C BUCK2 VOUT2 PH B 75 3.3Vin, 1.8Vout, 1Phase 5A WDOG RST RTN4 3.3Vin, 1.8Vout, 2Phase VOUT3 AVIN FILT BUCK3 PH A 70 5A GND PGNDs 0.01 0.10 1.00 10.00 PHASE CONFIGURATIONS Load Current (A) Figure 2. Efficiency vs Load Current Figure 1. Simplified Block Diagram FN8922 Rev.3.01 Page 1 of 56 Mar 5, 2020 Efficiency (%)ISL91211A, ISL91211B Contents 1. Overview . 4 1.1 Typical Application Diagrams . 4 1.2 Block Diagram 5 1.3 Ordering Information . 6 1.4 Pin Configuration 7 1.5 Pin Descriptions . 8 1.6 I/O Pin Configuration . 9 2. Specifications 10 2.1 Absolute Maximum Ratings . 10 2.2 Thermal Information . 10 2.3 Recommended Operating Conditions . 10 2.4 Analog Specifications . 11 3. Output Configurations . 13 4. Typical Operating Performance . 15 5. Applications Information . 21 5.1 Inductor Selection 21 5.2 Output Capacitor Selection . 21 5.3 Input Capacitor Selection . 22 5.4 Dynamic Voltage Scaling (DVS) . 22 5.5 Configuring DVS Speed 25 5.6 Output Voltage Setting . 25 5.7 Power Sequencing . 25 5.8 Watchdog Time (WDOG RST Pin) . 27 5.9 Interrupt Pin . 28 6. Protection Features (FAULTS) 29 6.1 Over-Temperature Protection . 29 6.2 Overcurrent Protection Mode 29 6.3 Overvoltage (OV)/Undervoltage (UV) Protection . 29 7. Serial Communication Interface . 30 7.1 The SPI Interface . 30 2 7.2 The I C Interface . 33 8. Board Layout Recommendations 37 8.1 PCB Layout Summary . 38 8.2 PCB Design for WLCSP Recommendations 39 FN8922 Rev.3.01 Page 2 of 56 Mar 5, 2020