RK809-1 Rockchip PMIC with Audio Codec 5 DCDC 9 LDO 2 Switches QFN-68-EP

RK809-1 Product Overview

The RK809-1 is a high-performance Power Management Integrated Circuit (PMIC) from Rockchip, packaged in QFN-68-EP (7x7mm), designed for multi-core system applications powered by external power supplies. The chip highly integrates both power management and audio codec functions, providing a complete power solution with minimal external components. The RK809-1 integrates 5 configurable synchronous step-down DCDC converters, 9 LDO linear regulators, 2 low Rds switches, a battery gauge, a Real-Time Clock (RTC), and an audio codec, with programmable power-up/down sequencing (OTP based). The device is widely used in tablets, set-top boxes, e-readers, portable media players, single-board computers, and smart home control panels.

RK809-1 Core Features

DCDC Buck Converters： Integrates 5 configurable synchronous step-down DCDC converters (DCDC_REG1 to DCDC_REG5). DCDC_REG1 and DCDC_REG2 for core power rails with output voltage from 0.75V to 1.35V. DCDC_REG4 fixed at 1.8V. DCDC_REG5 is a buck type regulator

LDO Linear Regulators： Integrates 9 high-performance LDO regulators (LDO_REG1 to LDO_REG9) with output voltage range from 1.5V to 3.3V, providing clean and stable power for processors, memory, PLLs, audio codecs

Low Rds Switches： Integrates 2 low on-resistance switches (SWITCH_REG1 and SWITCH_REG2) for peripheral power switching, load management, and 3.3V power rail supply

Audio Codec： Integrates audio codec supporting audio input/output processing, providing all-in-one solution for multimedia applications

Real-Time Clock RTC： Integrates RTC providing 32.768kHz output buffer and real-time functions, supporting crystal oscillator based 32.768kHz clock generation for system wake-up and timing

Battery Gauge： Integrated battery gauge function for battery monitoring and management in portable battery-powered devices

Power Sequencing Control： Supports programmable power-up and power-down sequencing based on OTP (One-Time Programmable) configuration for customized power sequences, meeting strict power timing requirements of multi-core processors

Dynamic Voltage Scaling： Supports DVS dynamic voltage scaling, dynamically adjusting output voltage based on processor load to optimize power consumption and extend battery life

I2C Control Interface： Supports I2C bus communication for software configuration of output voltages, power sequencing, and switch states

Adjustable Current Limit： Features adjustable current limit for configuring current threshold based on load requirements, protecting downstream circuits

Overcurrent Protection： Built-in overcurrent protection (OCP) automatically limits current during output overload or short circuit

Package Type： QFN-68-EP (7x7mm) with exposed pad for enhanced thermal dissipation, ideal for compact PCB designs

Temperature Range： -40°C to 85°C industrial grade temperature range

Ultra-Low Standby Power： System power consumption as low as 1.3W when paired with low-power processors

RK809-1 Applications

Tablets： Complete power management solution for ARM architecture tablets with integrated audio codec for multimedia playback

Set-Top Boxes： Suitable for Android TV boxes, OTT set-top boxes, and home entertainment devices with all-in-one power and audio solution

E-Readers： Efficient power management and low-power standby for electronic ink screen readers

Portable Media Players： Integrated power management and audio codec perfectly matching portable multimedia device requirements

Single-Board Computers： Standard PMIC companion power solution for Rockchip processor SBCs

Smart Home Control Panels： Ultra-low power operation (1.3W total) with Rockchip PX30 processor for control panel applications

Robot Vacuums： RK809-1 used in Ecovacs Deebot Ozmo T8 AIVI as PMIC and audio CODEC

Embedded Systems： Power management core for ARM-based embedded Linux/Android boards, IoT gateways, and edge computing nodes

RK809-1 Key Advantages

High Integration 2-in-1 Solution： Single RK809-1 chip integrates 5 DCDCs, 9 LDOs, 2 switches, RTC, and audio codec with 16 power output channels, meeting both power management and audio processing needs, replacing multiple discrete chips to save PCB area and BOM cost

Complete Power Management Capability： Full power distribution network from 5 DCDCs to 9 LDOs with voltage range covering 0.75V to 3.3V, meeting supply requirements of all system components including processors, memory, WiFi/BT modules, and codecs

Programmable Power Sequencing： OTP-based programmable power-up/down sequencing allows precise configuration of power-up order and timing intervals for each rail, meeting strict power sequencing requirements of multi-core processors

Integrated Audio Codec： Unlike most pure-power PMICs, RK809-1 integrates audio codec providing all-in-one solution for multimedia applications, saving cost and space of additional audio chips

Low Power Platform Ready： System power consumption as low as 1.3W when paired with low-power processors, ideal for battery-powered and 24/7 IoT devices

Flexible Dynamic Voltage Scaling： DVS support allows system to adjust core voltage based on real-time processor load, providing sufficient voltage for high performance and lowering voltage during light loads to save power

Proven Application Validation： RK809-1 successfully deployed in mass-produced products like Ecovacs Deebot T8 series and smart home control panels, mature stable and reliable

Rich Reference Designs： Rockchip provides complete reference designs with Rockchip processors including schematics, PCB layout, and software drivers with native Linux kernel support, reducing development difficulty

Industrial Grade Reliability： -40°C to 85°C wide temperature range with overcurrent protection and adjustable current limiting for industrial environments

Compact Package for Miniaturization： QFN-68-EP 7x7mm small footprint with exposed pad for thermal dissipation, meeting portable device miniaturization requirements

Mass Production Supply： Abundant market inventory with tiered pricing, meeting procurement needs from pilot runs to mass production

Environmental Compliance： RoHS compliant with lead-free process and green materials meeting global environmental regulations

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FAQ:

1. What is the RK809-1 PMIC and its key specifications?
   The RK809-1 is a highly integrated Power Management IC (PMIC) from Rockchip, designed for advanced portable and embedded systems that demand maximum power flexibility and integrated audio. It combines 5 synchronous DC‑DC buck converters, 9 low‑dropout linear regulators (LDOs), 2 configurable switches, a complete single‑cell Li‑Ion battery charger (up to 2.5 A), a fuel gauge, an RTC, and a built‑in audio codec (DAC + headphone amp + microphone input). The device communicates via I2C (default address 0x1A) and is housed in a compact QFN‑68‑EP package (7 mm × 7 mm). Key input voltage range: 2.7 V – 5.5 V. This PMIC offers the richest combination of power rails and switches in the RK809 family, making it ideal for complex system‑on‑chip designs that require multiple independent voltage domains and intelligent power sequencing.

2. How does the RK809-1 differ from the RK809-3 and RK809-5?
   The RK809‑1, RK809‑3, and RK809‑5 all share the same audio codec, battery charger, and I2C interface, but they differ in power channel count and extra features. The RK809‑5 provides 4 DC‑DC bucks and 8 LDOs. The RK809‑3 upgrades to 5 DC‑DC bucks and 9 LDOs. The RK809‑1 is the top‑of‑the‑line model, adding 2 configurable switches on top of the 5 bucks and 9 LDOs. These switches can be used for power‑path management, driving external MOSFETs, or enabling additional peripherals. All three are pin‑compatible in the QFN‑68 package. Choose the RK809‑1 when you need the most granular power control and additional switching outputs; the RK809‑3 is a perfect choice when switches are not required; and the RK809‑5 is a cost‑optimised solution for designs with fewer power rail requirements.

3. What are the output capabilities of the five DC‑DC buck converters in the RK809-1?
   The five synchronous buck converters deliver the main system power rails: BUCK1 and BUCK2 can each supply up to 4 A; BUCK3 and BUCK4 each provide up to 2.5 A; and BUCK5 offers up to 1.5 A. All output voltages are programmable via I2C, enabling dynamic voltage scaling (DVFS) for CPU cores, GPU, memory, and I/O domains. This rich high‑current architecture comfortably powers multi‑core application processors and FPGAs.

4. How many LDOs and switches does the RK809-1 have, and what are they used for?
   It provides 9 LDO channels, each typically rated for 100 mA – 300 mA. These low‑noise regulators supply sensitive analog and always‑on circuits such as PLLs, USB PHYs, audio codecs, camera modules, and RTC domains. The 2 additional switches are configurable general‑purpose outputs that can be used to control external power rails, enable/disable peripherals, or drive small loads directly. This combination of LDOs and switches gives system designers unmatched flexibility in power sequencing and peripheral control.

5. Does the RK809-1 include a battery charger? What are the charging specifications?
   Yes, it integrates a switching battery charger for single‑cell Li‑Ion/Li‑Poly batteries. The charging current can be programmed up to 2.5 A. 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 charger input is separate from the system input, allowing simultaneous operation and charging.

6. What audio features are integrated into the RK809-1?
   The on‑chip audio codec supports a 24‑bit/192 kHz stereo DAC, a headphone amplifier delivering up to 30 mW per channel, and a microphone input with a programmable gain amplifier (PGA). It provides both analog and I2S/PCM digital audio interfaces, enabling high‑quality playback, voice recording, and hands‑free calls. This built‑in audio eliminates the need for an external codec in many consumer and industrial designs.

7. How do I control the RK809-1, and what is its I2C address?
   All functions are controlled through a standard I2C serial interface operating at up to 400 kHz. The default 7‑bit I2C address is 0x1A (write). The host SoC can read and write internal registers to set output voltages, enable or disable power channels, adjust charging parameters, configure the audio path, and read status flags. This fine‑grained control enables efficient power management and dynamic voltage scaling in portable devices.

8. What protection features does the RK809-1 include?
   The RK809‑1 offers comprehensive hardware protections: cycle‑by‑cycle over‑current protection (OCP) on each DCDC and LDO, over‑temperature protection (OTP) with hysteresis, under‑voltage lockout (UVLO) on the main input, battery over‑voltage / over‑discharge protection, and a thermal shutdown mechanism. A power‑good (PG) flag and an interrupt output notify the host of any fault conditions, ensuring reliable operation in demanding applications.

9. What is the QFN‑68‑EP package and how does it simplify design?
   The RK809‑1 is housed in a QFN‑68‑EP package measuring only 7 mm × 7 mm with a lead pitch of 0.4 mm. The exposed thermal pad (EP) ensures efficient heat dissipation. The extreme integration — five bucks, nine LDOs, two switches, charger, audio, and RTC — dramatically reduces component count and PCB area, making it a true one‑chip power and audio solution for the most space‑constrained and feature‑rich portable designs.

10. What are the most typical applications for the RK809-1?
    It is the preferred choice for high‑end Rockchip‑based tablets, advanced portable media players, complex IoT gateways, industrial handheld terminals, and other battery‑powered products that use SoCs such as RK3288, RK3399, RK3588, and similar. The five DCDC channels, nine LDOs, two extra switches, integrated audio, and charger make it the ultimate power management solution for designs that require maximum power flexibility, intelligent sequencing, and superior audio quality — all in a single, compact chip.