Item specifics
Description
RK809-5A Product Overview
The RK809-5A is a high-performance Power Management IC (PMIC) from Rockchip, packaged in QFN-68-EP (7×7mm). It is the official replacement for the discontinued RK809-5 model. Designed for industrial-grade applications with operating temperature range of -40°C to 85°C, the device is widely used in RK series processor platforms including ROCK960, Toybrick TB-RK3399ProD, and ODROID-M1/M1S development boards.
The RK809-5A integrates multiple DCDC buck converters and LDO linear regulators, providing complete system power management solutions.
RK809-5A Core Features
Power Architecture： Integrates multiple synchronous step-down DCDC converters and LDO regulators for complete system power distribution
DCDC Configuration： High-efficiency buck converters with Dynamic Voltage Scaling (DVS) support for power optimization
LDO Regulators： Multiple LDOs providing low-noise, high-PSRR power for sensitive circuits including PLLs and audio codecs
I2C Control Interface： I2C bus support for software configuration of output voltages and power sequencing
Package Type： QFN-68-EP (7×7mm) with exposed pad for enhanced thermal dissipation
Temperature Range： Industrial grade -40°C to 85°C
Power Consumption： Normal mode ~0.75W (5V/150mA), Max 3.0W (5V/600mA), Min 0.05W (5V/10mA)
Replacement Note： RK809-5 discontinued, RK809-5A is official replacement requiring bootloader update
RK809-5A Applications
Industrial Single Board Computers： Standard PMIC for Firefly Core-3562JQ and industrial SOMs
RK Processor Companion Power： Power management for Rockchip RK series processors (RK3562, RK3399Pro)
Embedded Linux Boards： Full PMIC driver support in Debian Linux systems
IoT Gateways： Low power characteristics for 24/7 edge computing devices
Industrial Automation Equipment： Wide temperature range for PLCs, HMIs, and industrial controllers
Smart Terminals： Power management for smart home hubs, digital signage, and 1080P camera devices
RK809-5A Key Advantages
Official Flagship PMIC Platform： Adopted by Advantech, ASUS, Firefly as standard PMIC solution; production-validated on multiple industrial SOMs
Industrial Grade Wide Temperature： -40°C to 85°C for harsh environments
Ultra-Low Power Consumption： Total system power of 0.75W in normal mode, 0.05W in sleep mode
Complete Software Ecosystem Support： Linux BSP with full PMIC support including Uboot and Kernel drivers; validated on Debian 10
Stable Supply Chain： Rockchip's flagship PMIC with abundant inventory; ROHS compliant and lead-free
Versatile Compatibility： Supports 1080P camera and basic video processing functions, applicable to consumer, industrial, and vision processing fields
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FAQ:
What is the RK809-5A PMIC and its key specifications?
The RK809-5A is a highly integrated Power Management IC (PMIC) from Rockchip, specifically designed as an industrial‑grade solution for portable and embedded applications. It integrates 4 synchronous DC‑DC buck converters, 8 low‑dropout linear regulators (LDOs), a single‑cell Li‑Ion battery charger with up to 2.5 A charging current, a fuel gauge, an RTC, and a complete audio codec (DAC + headphone amp + microphone input). The device operates over an extended temperature range of ‑40 °C to +85 °C, is controlled via I2C (default address 0x1A), and comes in a compact QFN‑68 package. It serves as a direct, robust replacement for the standard RK809‑5 in industrial and automotive environments.
How does the RK809-5A differ from the standard RK809-5?
The RK809-5A is the industrial‑grade variant of the RK809‑5. While both share identical DC‑DC, LDO, audio, and charging capabilities, the RK809‑5A is guaranteed to operate over a wider ‑40 °C to +85 °C temperature range (compared to the commercial 0 °C to +70 °C of the typical RK809‑5). It is also built with more robust manufacturing and testing, making it suitable for outdoor, automotive, and factory‑floor applications. Electrically and functionally, it is a drop‑in replacement — the same PCB layout, I2C commands, and software drivers can be used unchanged.
What are the output capabilities of the four DC‑DC buck converters?
The four synchronous buck converters provide the main power rails: BUCK1 and BUCK2 can each deliver up to 4 A, BUCK3 up to 2.5 A, and BUCK4 up to 2.5 A. All output voltages are programmable via I2C, allowing dynamic voltage scaling for the CPU core, GPU, memory, and I/O domains. The high current capability makes the RK809‑5A suitable for powering multi‑core SoCs and FPGAs.
How many LDOs does the RK809-5A have, and what are they used for?
It provides 8 LDO channels, each typically rated for 100 mA – 300 mA. These low‑noise, low‑dropout regulators supply analog circuitry such as PLLs, USB PHYs, audio codecs, camera modules, and always‑on RTC domains. One LDO is dedicated as a low‑quiescent‑current RTC supply, allowing the system clock and critical registers to remain powered during suspend or power‑off conditions.
Does the RK809-5A 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, and 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 the device to operate and charge simultaneously.
What audio features are integrated into the RK809-5A?
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 offers both analog and I2S/PCM digital audio interfaces, enabling playback, voice recording, and hands‑free calls. This built‑in audio eliminates the need for an external codec in many industrial HMI and voice‑control designs.
How do I control the RK809-5A, 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. The register map is fully compatible with the RK809‑5, ensuring existing drivers work without modification.
What protection and monitoring features does the RK809-5A include?
The RK809‑5A provides comprehensive safeguards: cycle‑by‑cycle over‑current protection (OCP) on each DCDC and LDO, over‑temperature protection (OTP) with hysteresis, under‑voltage lockout (UVLO), 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 harsh industrial environments.
What is the QFN‑68 package and how does it simplify design?
The RK809‑5A is housed in a QFN‑68 package measuring approximately 7 mm × 7 mm with a lead pitch of 0.4 mm. It features an exposed thermal pad for efficient heat dissipation. The high level of integration — power, audio, charging, and RTC — significantly reduces the component count and PCB area, making it a one‑chip solution for compact industrial tablets, smart panels, and IoT gateways.
What are the most typical applications for the RK809-5A?
This industrial‑grade PMIC is widely used in Rockchip‑based industrial control panels (RK3288, RK3399, PX30), outdoor digital signage, automotive infotainment, smart home hubs, medical diagnostic terminals, and battery‑powered field instruments. Its wide temperature range, integrated audio, and high‑current charging make it a robust and versatile power management solution for reliable always‑on systems.