RK806M-2 Rockchip Power Management IC PMIC Dynamic Voltage Scaling Power Sequencing QFN-68

RK806M-2 Product Overview

The RK806M-2 is a high-performance Power Management IC (PMIC) from Rockchip, packaged in QFN-68 (7×7mm), designed for application processor systems requiring precise power management. The chip integrates two core functions: power sequencing control and dynamic voltage scaling, providing stable and configurable power solutions for processors, memory, and other peripherals. The RK806M-2 is widely used in Rockchip processor companion systems, industrial control, and smart terminals requiring high-performance power management.

RK806M-2 Core Features

Power Sequencing Control： Integrated programmable power sequencing control supporting precise power-up sequence management for multiple power rails, meeting strict timing requirements of processors and complex chips

Dynamic Voltage Scaling： Supports DVS dynamic voltage scaling, dynamically adjusting output voltage based on processor load to significantly reduce system power consumption and improve energy efficiency

Multiple Power Rails： Integrates multiple DCDC buck converters and LDO linear regulators, providing complete power solutions for processors, memory, and peripherals

QFN-68 Package： 7×7mm QFN-68 compact package with 0.4mm pin pitch, ideal for space-constrained portable devices and embedded system designs

High Integration： Single chip integrates multiple power management functions, eliminating multiple discrete power ICs, significantly saving PCB area and reducing BOM cost

I2C Programmable Interface： Supports I2C bus communication for software configuration of output voltages and power sequencing, adapting to different platform requirements without hardware modifications

High Efficiency Conversion： Integrated high-efficiency DCDC converters providing excellent power conversion efficiency, reducing energy loss and heat generation

Protection Features： Built-in undervoltage lockout, overcurrent protection, overtemperature protection ensuring reliable system operation

Wide Input Voltage： Supports wide input voltage range adapting to various power adapter types

Industrial Grade Design： Wide operating temperature range suitable for both industrial and consumer applications

RK806M-2 Applications

Rockchip Processor Companion Power： Dedicated power management solution for Rockchip RK series processors ensuring stable and reliable operation

Industrial Control Equipment： Suitable for PLCs, industrial automation equipment, robot controllers requiring high power stability and reliability

Smart Terminals： Power management core for smart home control panels, smart speakers, smart displays and consumer electronics

Embedded Systems： Power management solution for embedded Linux/Android boards, IoT gateways, edge computing nodes

Portable Devices： Battery-powered portable devices benefit from DVS feature to extend battery life

Automotive Electronics： Car infotainment systems, smart cockpits and other automotive applications

RK806M-2 Key Advantages

Precise Power Sequencing Control： Processors and complex chips have strict requirements on power-up sequence order. RK806M-2 programmable sequencing ensures safe, controlled system startup, preventing chip damage or instability caused by sequencing errors

Dynamic Voltage Scaling for Power Savings： DVS is a core advantage of high-end PMICs, allowing dynamic adjustment of core voltage based on processor load. Provides sufficient voltage for high performance and lowers voltage during light loads to save power, especially valuable for battery-powered devices

High Integration Simplifies Design： Single RK806M-2 chip integrates multiple power management functions, greatly simplifying PCB layout and peripheral circuit design, reducing development cycles, BOM costs, and production complexity

Compact Package for Miniaturization： 7×7mm QFN-68 small footprint suitable for space-constrained portable devices and embedded systems, meeting the miniaturization trend of modern electronics

Flexible Programmable Configuration： I2C bus allows dynamic configuration of output voltages and sequencing. Same hardware platform can adapt to different processors and memory solutions without PCB modifications, enabling product family development

Comprehensive System Protection： Built-in undervoltage lockout, overcurrent, and overtemperature protections prevent system damage under abnormal conditions, improving product reliability and safety

Mature Companion Ecosystem： Rockchip original design with seamless integration with RK series processors, providing complete reference designs and software driver support, significantly reducing development difficulty

Stable Supply Chain： Rockchip as a leading domestic IC supplier ensures stable supply for volume production and long-lifecycle project procurement

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FAQ:

1. What is the RK806M-2 PMIC and its key specifications?
   The RK806M‑2 is a high‑performance Power Management IC (PMIC) from Rockchip, designed to deliver precise power regulation and advanced sequencing for high‑end tablets, embedded systems, and industrial control platforms. It integrates 5 synchronous step‑down DC‑DC converters (bucks), 9 low‑dropout linear regulators (LDOs), and a complete single‑cell Li‑Ion battery charger with up to 3 A charging current. The device also includes a fuel gauge, an RTC, and robust power‑path management. It is controlled via I2C (default address 0x1A) and housed in a compact QFN‑68 package (7 mm × 7 mm). Key input voltage range: 2.7 V – 5.5 V. Unlike some other Rockchip PMICs, it does not include an audio codec, focusing entirely on high‑current power delivery, dynamic voltage scaling (DVS), and reliable power‑up sequencing.

2. How does the RK806M-2 differ from the RK809 or RK817 PMICs?
   The RK806M‑2 is a more power‑focused and higher‑integration device compared to the RK809/RK817. The RK809/RK817 both include a built‑in audio codec (DAC, headphone amp, microphone input), whereas the RK806M‑2 has no audio codec. In return, the RK806M‑2 offers a more powerful battery charger (3 A vs. 2.5 A), improved dynamic voltage scaling (DVS) support for multiple independent voltage rails, and additional LDOs for finer power sequencing. It is pin‑compatible with the RK806 family, but the RK806M‑2 variant is specifically optimised for multi‑rail applications that demand precise voltage ramping and sequencing, such as FPGA‑based systems and complex SoCs.

3. What are the output capabilities of the five DC‑DC buck converters?
   The five synchronous buck converters provide the main system power rails: BUCK1 and BUCK2 can each deliver up to 4 A; BUCK3 and BUCK4 each supply up to 2.5 A; and BUCK5 provides up to 1.5 A. All output voltages are independently programmable via I2C, and each rail supports dynamic voltage scaling (DVS) to adjust voltage on‑the‑fly for power savings or performance boosts. This high‑current, multi‑rail architecture is ideal for powering application processors, DDR memory, and multiple I/O banks from a single chip.

4. How many LDOs does the RK806M-2 have, and what are they used for?
   It provides 9 low‑dropout linear regulators (LDOs), each typically rated for 100 mA – 300 mA. These low‑noise, low‑ripple outputs are dedicated to sensitive analog and always‑on circuits, such as PLLs, USB PHYs, camera modules, sensor interfaces, and RTC domains. One LDO is a special ultra‑low‑quiescent‑current RTC supply that stays alive during suspend or power‑down to maintain system time and critical registers. The high number of LDOs allows designers to partition the system into clean, isolated power domains.

5. What is Dynamic Voltage Scaling (DVS), and how does the RK806M-2 implement it?
   DVS allows the host processor to dynamically change the output voltage of one or more power rails during operation. The RK806M‑2 supports DVS on all of its buck converters via I2C commands. This enables the system to lower the core voltage when the CPU is idle (saving power) and raise it when high performance is needed. The transitions are smooth and glitch‑free, ensuring stable operation. Combined with the PMIC's hardware sequencing, DVS helps achieve optimal performance‑per‑watt in battery‑powered and thermally constrained designs.

6. How does the RK806M-2 handle power‑up and power‑down sequencing?
   The RK806M‑2 includes a built‑in programmable power sequencer. You can configure the turn‑on order and delay between each regulator (bucks and LDOs) via I2C registers, ensuring that the core voltage, memory, and I/O rails come up in the correct order required by your SoC or FPGA. During shutdown, the sequence can be reversed to safely discharge each rail. This hardware sequencing operates independently of the main CPU, guaranteeing reliable system boot‑up and preventing latch‑up or inrush issues even if software is not yet running.

7. Does the RK806M-2 include a battery charger? What are the charging specifications?
   Yes, it integrates a powerful switching battery charger designed for single‑cell Li‑Ion/Li‑Poly batteries. The charging current can be programmed up to 3 A, which is higher than many other Rockchip PMICs. It supports constant‑current/constant‑voltage (CC/CV) charging, battery temperature monitoring, automatic power‑path management, and a built‑in fuel gauge for capacity estimation. The separate charger input allows simultaneous system operation and battery charging.

8. How do I control the RK806M-2, and what is its I2C address?
   All configuration and status monitoring are performed through a standard I2C serial interface operating at up to 400 kHz. The default 7‑bit I2C address is 0x1A (write). By reading and writing internal registers, the host SoC can set output voltages, enable or disable individual rails, adjust charging parameters, read power‑good status, and configure the power‑on sequencing. This level of software control enables sophisticated power management strategies in complex embedded systems.

9. What protection features does the RK806M-2 include?
   The RK806M‑2 provides comprehensive hardware protections to ensure safe operation under fault conditions. Each DCDC and LDO channel features cycle‑by‑cycle over‑current protection (OCP). The chip also includes over‑temperature protection (OTP) with hysteresis, under‑voltage lockout (UVLO) on the main input, battery over‑voltage and over‑discharge protection, and a thermal shutdown mechanism. A power‑good (PG) output and an interrupt pin alert the host to any anomalies, making the device suitable for reliable industrial and medical equipment.

10. What are the most typical applications for the RK806M-2?
    With its high‑current DCDC rails, precise DVS, programmable sequencing, and compact QFN‑68 package, the RK806M‑2 is a popular choice for high‑end Rockchip SoC platforms (such as RK3588, RK3399, RK3568 series), FPGA‑based industrial controllers, medical terminals, advanced tablets, and portable test equipment. It excels in any design that requires multiple independent, finely‑controlled power rails, reliable power‑up sequencing, and a strong battery charger in a single, space‑saving chip.