DATASHEET ZL8801 FN8614 Rev.3.00 Dual Phase PMBus ChargeMode Control DC/DC Digital Controller March 27, 2015 The ZL8801 is a dual phase digital DC/DC controller. Up to four Features ZL8801s (8 phases) can be operated in parallel to provide Unique compensation-free design always stable additional output current. Output voltage range: 0.54V to 5.5V The ZL8801 supports a wide range of output voltages (0.54V to 5.5V) operating from input voltages as low as 4.5V Input voltage range: 4.5V to 14V up to 14V. 1% output voltage accuracy over line, load and temperature With its fully digital ChargeMode Control loop the ZL8801 Charge mode control achieves fast transient response, can respond to a transient load step within a single switching reduced output capacitance and provides output stability cycle. This unique compensation-free modulation technique without compensation allows designs to meet transient specifications with minimum Single 2-phase output, up to 8 phases with multiple devices output capacitance, thus saving cost and board space. Switching frequency range 200kHz to 1.33MHz Intersils proprietary single wire DDC (Digital-DC) serial bus Proprietary single wire DDC (Digital-DC) serial bus enables enables the ZL8801 to communicate between other Intersil voltage sequencing and fault spreading with all other Intersil digital power ICs. By using the DDC, the ZL8801 achieves digital power ICs complex functions such as inter-IC phase current balancing, sequencing and fault spreading, eliminating complicated Tracking of an external power supply in the single 2-phase power supply managers with numerous external discrete configuration components. Cycle-by-cycle inductor peak current protection The ZL8801 features cycle-by-cycle overcurrent protection and Digital fault protection for output voltage UV/OV, input protection for overvoltage, undervoltage, over-temperature and voltage UV/OV, temperature and MOSFET driver voltage MOSFET driver under and overvoltage protection. A snapshot 10-bit cycle-by-cycle average output current measurement parametric capture feature allows users to take a snapshot of with adjustable gain settings for sensing with high current, operating and fault data during normal or fault conditions. low DCR inductors Integrated Low Drop-Out (LDO) regulators allow the ZL8801 to 10-bit monitor ADC measures input voltage, input current, be operated from a single input supply eliminating the need output voltage, internal, external temperature, driver voltage for additional linear regulators. A dedicated 5V VDRV LDO Configurable to use standalone MOSFET drivers or output can be used to power external drivers or DrMOS integrated driver-MOSFET (DrMOS) devices devices. Nonvolatile memory (NVRAM) for storing operating With full PMBus compliance, the ZL8801 is capable of parameters and fault events. measuring and reporting input voltage, input current, output voltage, output current as well as the devices internal PMBus compliant temperature, an external temperature and an auxiliary voltage input. Applications Servers/storage equipment Related Literature Telecom/datacom equipment AN1948, ZL8801-4PH-DEMO1Z Demonstration Board User Power supplies (memory, DSP, ASIC, FPGA) Guide TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS UG005, ZL8801-2PH-DEMO1Z Demonstration Board User Guide PART NUMBER DUAL OUTPUT DUAL PHASE DDC CURRENT SHARE AN1900, USB to PMBus Adapter User Guide ZL8800 Yes Yes No ZL8801 No Yes Yes FN8614 Rev.3.00 Page 1 of 87 March 27, 2015ZL8801 Table of Contents Simplified Application . 3 Block Diagram 4 Schematic 5 Pin Configuration 6 Pin Description 6 Ordering Information 8 Absolute Maximum Ratings . 9 Thermal Information . 9 Recommended Operating Conditions 9 Electrical Specifications . 9 ZL8801 Overview . 12 Digital-DC Architecture Overview . 12 Power Management Overview . 12 Multi-mode Pins . 12 Configurable Pins 13 SMBus Device Address Selection (SA) 13 Output Voltage and VOUT MAX Selection (VSET) . 13 Switching Frequency Setting (SYNC) 14 Input Voltage Undervoltage Lockout Setting (UVLO) 14 Internal Bias Regulators and Input Supply Connections . 15 Start-up Procedure . 15 TON Delay and Rise Times 16 Enable . 16 Power-good . 16 Power Management Functional Description 16 Output Overvoltage Protection . 16 Output Prebias Protection 16 Output Overcurrent Protection . 17 Current Limit Configuration . 18 Input Current Monitor 18 Thermal Overload Protection 18 Voltage Tracking 18 Voltage Margining . 19 External Voltage Monitoring . 19 SMBus Communications 19 Digital-DC Bus 20 Phase Spreading 20 Output Sequencing 20 Fault Spreading . 21 Active Current Sharing . 21 Temperature Monitoring Using XTEMP Pin . 21 Nonvolatile Memory (NVRAM) and Security Features 22 DC/DC Converter Design . 22 Power Train Component Selection . 22 Monitoring via SMBus 24 PMBus Command Summary 25 PMBus User Guidelines . 29 PMBus Data Formats . 29 PMBus Command Detail 30 Revision History 86 About Intersil 86 Package Outline Drawing 87 FN8614 Rev.3.00 Page 2 of 87 March 27, 2015