PV88090 High Efficiency 3-Channel Buck Converter with dual LDO General Description PV88090 is a power management unit (PMU) optimized for supplying systems with central processing units (CPU), input/output (I/O), and dual data rate (DDR) memory. The target application range covers television, set-up box, wifi routers, and enterprise access point and network addressable servers. PV88090 features a two-phase buck converter providing up to 9.5 A current, and two one-phase buck converters for dual date rate (DDR) memory and auxiliary power. High efficiency is achieved over a wide load range by using automatic pulse frequency modulation (PFM). All power switches are integrated, eliminating the need for external Schottky diodes are not needed. This optimizes power efficiency and reduces the external component count. Two LDO regulators with programmable output voltage are integrated and provide up to 400 mA. PV88090 provides dynamic voltage control 2 (DVC) via I C command to support adaptive adjustment of the supply voltage based on the processor loading. All power blocks have over-current circuit protection and the start-up timing can be 2 controlled through the I C interface. The supply voltages of PV88090 control can be realized via 2 direct register writes through the I C interface to the operating point of the system. PV88090 includes over-temperature and over-current protection for increased system reliability, without external sensing components. A soft-start mechanism limits the inrush current from the input node and secures a slope-controlled rail activation. A standby mode provides reduced power consumption. Optional standby operation for DDR memory, auxiliary buck, and analog core LDO are configurable in PV88090 for optimizing the power rails. The PV88090is available in a 30-pin QFN package and is specified from -40 C to 85 C ambient temperature. Key Features Input voltage 4.75 V to 5.25 V Integrated power switches Three synchronous buck converters with DVC for buck converters integrated low RON FET 2 LDO regulators Buck1: Programmable output voltage from LDO1: 1.05 V to 1.23 V, 400 mA 0.9 V to 1.3 V with 9.5 A continuous output LDO2: 1.8 V to 3.3 V, 250 mA current, 11 A peak current if standalone Adjustable soft-start Buck2: Programmable output voltage from 2 I C compatible interface 1 V to 2.5 V with 2 A continuous output current -40 C to +85 C ambient temperature range Buck3: Programmable output voltage 1.3 V to 3.4 V with 2 A continuous output Custom 30-pin FC-MQFN package with current thermal pad, 0.5 mm pin pitch 93 % efficiency Auto mode on all three buck converters Applications Supply for digital television processor Power supply for digital set top box (STB) Networking home terminal Datasheet Revision 2.6 04-Aug-2017 CFR0011-120-00 1 of 42 2017 Dialog Semiconductor PV88090 High Efficiency 3-Channel Buck Converter with dual LDO System Diagram VDLDO2 VDD2 BUCK2 LDO2 250mA 1uF 1.5uH VBUCK2 VDLDO1 60uF DVS DAC LDO1 400mA 2.2uF VDD1 BUCK1 Phase1 1.5uH PV88090 VDD DVS DAC LDO Core DVDD VDD1 Reference Voltage BUCK1 Voltage Supervision Phase2 1.5uH VBUCK1 60uF Over Internal Temperature Oscillator Protection VDDIO VDD3 BUCK3 Sequence STBY 1.5uH and ON/OFF VBUCK3 SWC Control nIRQ DVS 60uF DAC Biasing I2C Slave OTP Interface Memory Circuit VPP VREF VSS 1uF ADDRSEL OTPSEL SCL SDA Figure 1: System Diagram Datasheet Revision 2.6 04-Aug-2017 CFR0011-120-00 2 of 42 2017 Dialog Semiconductor