DA9121 High-Performance, 10 A, Dual-Phase DC-DC Converter General Description DA9121 is a power management unit (PMU) suitable for supplying CPUs, GPUs, DDR memory rails in single in-line pin package (SIPP) modules, smartphones, tablets, and other handheld applications. DA9121 operates as a single-channel dual-phase buck converter, each phase requiring a small external 0.10 H inductor. It is capable of delivering up to 10 A output current at a 0.3 V to 1.9 V output voltage range. The 2.5 V to 5.5 V input voltage range is suitable for a wide variety of low- voltage systems, including, but not limited to, all Li-Ion battery supplied applications. With remote sensing, the DA9121 guarantees the highest accuracy and supports multiple PCB routing scenarios without loss of performance. The pass devices are fully integrated, so no external FETs or Schottky diodes are needed. A programmable soft start-up can be enabled, which limits the inrush current from the input node and secures a slope-controlled rail activation. The dynamic voltage control (DVC) supports adaptive adjustment of the supply voltage dependent on 2 the processor load, via either a direct register write using the communication interface (I C- compatible) or with a programmable input pin. 2 A configurable GPI allows multiple I C address selection for multiple instances of DA9121 in the same application. DA9121 has integrated over-temperature and over-current protection for increased system reliability, without the need for external sensing components. Key Features 2.5 V to 5.5 V input voltage Voltage, current, and temperature supervision 0.3 V to 1.9 V output voltage -40 C to +85 C ambient temperature 4 MHz nominal switching frequency range 1 % accuracy (static) Package: 5 % accuracy (dynamic) 24WLCSP 2.5 mm x 1.7 mm (0.4 mm pitch) 2 I C-compatible interface (FM+) 24WLP 2.7 mm x 1.9 mm (0.4 mm pitch) Programmable GPIOs Programmable soft-start Applications SIPP modules (SoC, DRAM) Ultrabooks Smartphones Wi-Fi Modules Tablet PCs Game Consoles Infotainment Datasheet Revision 2.3 18-Sep-2020 CFR0011-120-00 1 of 50 2020 Dialog Semiconductor DA9121 High-Performance, 10 A, Dual-Phase DC-DC Converter System Diagrams DDR 1.1 V 1.8 V CPU GPU IC EN PVDD IC EN PVDD IC EN PVDD DA9122 AVDD DA9121 AVDD DA9121 AVDD SoC VR AGND CONF AGND CONF AGND HOT GPIO VR CPU HOT VR GPU HOT PG (DVS ready) CPU LP GPU EN GPU LP IO LP DDR LP VR DDR HOT Figure 1: Typical Application Diagram (Port Control) DDR 1.1 V 1.8 V CPU GPU IC EN PVDD IC EN PVDD IC EN PVDD DA9122 DA9121 DA9121 AVDD AVDD AVDD SoC CONF AGND CONF AGND CONF AGND 2 I C GPIO I2C CLK I2C DATA Faults PG (ENx/DVS ready) GPU EN 2 Figure 2: Typical Application Diagram (I C Control) V = 2.5 V to 5.5 V DD 1 F 2x 10 F PVDD1 FB1P 100 nH 100 nH V = 0.3 V to 1.9 V OUT1 Buck1 4 x 10 F PGND Digital Core OTP Memory FB1N IC EN DA9121 Register Map CONF/GPIO0 GPIO1 Bias Supervision NC GPIO2 Oscillator SCL/GPIO3 SDA/GPIO4 2 I C AGND NC GPIO Figure 3: Simplified Schematic Diagram Datasheet Revision 2.3 18-Sep-2020 CFR0011-120-00 2 of 50 2020 Dialog Semiconductor ON ON nIRQ FB2N EN2 FB2N FB2P FB2P PG LP2 LX2 LX2 SDA LX1 LP1 LX1 FB1P FB1P SCL FB1N PG FB1N V5.0 V5.0 ON VR nIRQ NC NC HOT NC NC PG1 PG1 LX2 LX2 SDA LX1 LP1 LX1 FB1P FB1P SCL FB1N EN1 FB1N V5.0 V5.0 ON ON VR nIRQ NC NC HOT NC NC PG1 PG1 LX2 LX2 SDA LX1 LP1 LX1 FB1P FB1P SCL FB1N EN1 FB1N V5.0 V5.0 V1.8 V1.8