RK809 Datasheet
Rev 2.3
Rockchip
RK809
Datasheet
Revision 2.3
March.2023
Copyright ©2023 Rockchip Electronics Co., Ltd.
1
RK809 Datasheet
Rev 2.3
Revision History
Date
Revision
2023-03-17
2.3
1，Add the RC oscillator and start up sequence
information of DC Characteristics
2022-11-14
2.2
1, Update power sequence description of the RK809-7A
2, Update the Description of the Reg38
3, Update the detail Description of the Power down
4, Update the Power on Description of the VDC
5，Update power sequence description of the RK809-7
6，Add the MSL and lead finish information
2022-03-13
2.1
1, Update the description of RK809-1A ，RK8095A,RK809-6A
2021-12-27
2.0
1, Update the description of RK809-7
1.9
1, Update power sequence description for SWOUT1 and
SWOUT2 of RK809-6
2,Update power on description of the EXT_EN
2021-11-23
1.8
1,Update power sequence description for default voltage
of the OFF channel
2,Update the Electrical Characteristics Table
3,Update the description of RegF0
4, Update the description of RK809-6
5, Update BUCKn_ILPK and BUCKn_ILVL informatiom
2020-10-14
1.7
Update VB_OK and RK809-5 description, figure
description, note of SLEEP pin active, Power Sequence
Description
2020-02-26
1.6
Add Functional Block Diagram
2019-10-09
1.5
Update register description
1.4
Update the header
2019-02-15
1.3
Add more detail description.
2018-12-29
1.2
RK809_1 LDO1 power up sequence modification
2018-08-28
1.1
Spec change @ power up sequence
2018-04-02
1.0
Initial release
2021-12-02
2019-06-18
Description
Copyright ©2023 Rockchip Electronics Co., Ltd.
2
RK809 Datasheet
Rev 2.3
Table of Content
Table of Content .................................................................................................. 3
Figure Index ....................................................................................................... 5
Table Index 6
Warranty Disclaimer ............................................................................................. 7
Chapter 1 Introduction ....................................................................................... 8
1.1 Overview ............................................................................................. 8
1.2
Feature ................................................................................................ 9
1.3
Block Diagram .................................................................................... 10
1.4 Typical Application Diagrams ................................................................... 11
Chapter 2 Package information ........................................................................... 13
2.1 Ordering information ........................................................................... 13
2.2
Top Marking ....................................................................................... 13
2.3
Pin Assignment ................................................................................... 16
2.4
MSL Information ................................................................................. 16
2.5
Lead Finish/Pin Material Information ...................................................... 16
2.6
Pinout Number Order ........................................................................... 18
Chapter 3 Electrical Characteristics ...................................................................... 20
3.1 Absolute Maximum Ratings .................................................................. 20
3.2
Recommended Operating Conditions ..................................................... 20
2.7
Dimension .......................................................................................... 16
3.3
DC Characteristics ............................................................................... 20
Chapter 4 Function Description ........................................................................... 28
4.1 Top State Machine ............................................................................... 28
4.1.1 State Machine Description .................................................................... 28
4.1.2 Power on Description ........................................................................... 28
4.1.3 Power down Description ....................................................................... 29
4.1.4 Reset Description ................................................................................ 30
4.1.5 Power Sequence Description ................................................................. 32
4.1.6 Sleep Description ................................................................................ 39
4.2
Power Channels .................................................................................. 39
4.2.1 Buck Description ................................................................................. 39
4.2.2 LDO Description .................................................................................. 42
4.3
Battery Gas Gauge .............................................................................. 43
4.4
Audio System ..................................................................................... 44
Copyright ©2023 Rockchip Electronics Co., Ltd.
3
RK809 Datasheet
Rev 2.3
4.4.1 General Description ............................................................................. 44
4.4.2 Audio Recording Path Description .......................................................... 44
4.4.3 Head-Phone Path Description ................................................................ 45
4.4.4 Speaker Path Description ..................................................................... 46
4.4.5 I2S Description ................................................................................... 47
4.4.6 RC Oscillator Description ...................................................................... 47
4.5
Others ............................................................................................... 47
4.5.1 Real Time Clock (RTC) Description......................................................... 47
Chapter 5 Register Description............................................................................ 48
5.1 Register Summary .............................................................................. 48
5.2
Register Description ............................................................................ 53
Chapter 6 Thermal Management ....................................................................... 125
6.1 Overview .......................................................................................... 125
6.2
Package Thermal Characteristics .......................................................... 125
Copyright ©2023 Rockchip Electronics Co., Ltd.
4
RK809 Datasheet
Rev 2.3
Figure Index
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
Fig.
1-1 RK809 Functional Block Diagram ........................................................... 10
1-2 RK809 Typical Application Diagram for no battery .................................... 11
1-3 RK809 Typical Application Diagram for two battery .................................. 12
2-1 Pin Assignment QFN7x7-68(Pitch=0.35mm) ........................................... 18
3-1 QFN687mm X 7mm ............................................................................. 17
4-1 State Machine .................................................................................... 28
4-2 Press “PWRON” key to turn on the PMIC ................................................. 28
4-3 VDC voltage Rising-edge to turn on the PMIC .......................................... 29
4-4 Long press “PWRON” key to turn off the PMIC ......................................... 29
4-5 VCC under-voltage to turn off the PMIC .................................................. 30
4-6 Long press “PWRON” key to restart the PMIC .......................................... 31
4-7 VCC under-voltage to restart the PMIC ................................................... 32
4-8 BUCK1 load transient rising edge........................................................... 40
4-9 BUCK1 load transient falling edge .......................................................... 40
4-10 BUCK1 load transient rising edge 2 ...................................................... 40
4-11 BUCK1 load transient falling edge 2 ..................................................... 41
4-12 BUCK1 efficiency curve when different input voltage............................... 41
4-13 BUCK2 efficiency curve when different input voltage............................... 41
4-14 BUCK3 efficiency curve when different input voltage............................... 42
4-15 BUCK4 efficiency curve when different input voltage............................... 42
4-16 BUCK5 efficiency curve when different input voltage,Vout=3.3V ............... 42
4-17 Gas gauge architecture ...................................................................... 43
4-18 Current ADC Relative Error Curve ........................................................ 44
4-19 Voltage ADC Relative Error Curve ........................................................ 44
4-20 Audio system architecture .................................................................. 44
4-21 Audio recording path THD+N ratio at differential mode ........................... 45
4-22 Head-phone path THD+N ratio ............................................................ 46
4-23 Speaker path THD+N ratio.................................................................. 47
Copyright ©2023 Rockchip Electronics Co., Ltd.
5
RK809 Datasheet
Rev 2.3
Table Index
Table 4-1 RK809-1 Power up/down sequence(x:BUCK3 voltage determined by external
divided resistor；LDO3 start up later than LDO1 for about 200uS ) ,Short press PWRON
key time is 100ms. .................................................................................... 32
Table 4-2 RK809-2 Power up/down sequence(x:BUCK3 voltage determined by external
divided resistor; LDO3 start up later than LDO1 for about 200uS) ,Short press PWRON
key time is 100ms. .................................................................................... 33
Table 4-3 RK809-3 Power up/down sequence(x:BUCK3 voltage determined by external
divided resistor; LDO3 start up later than LDO1 for about 200uS) ,Short press PWRON
key time is 100ms. .................................................................................... 34
Table 4-4 RK809-5 Power up/down sequence(x:BUCK3 voltage determined by external
divided resistor;LDO3 start up later than LDO2 for about 200uS ) ,Short press PWRON
key time is 100ms. .................................................................................... 35
Table 4-5 RK809-6 Power up/down sequence(x:BUCK3 voltage determined by external
divided resistor; LDO3 start up later than LDO1 for about 200uS) ,Short press PWRON
key time is 100ms. .................................................................................... 35
Table 4-6 RK809-7 Power up/down sequence(x:BUCK3 voltage determined by external
divided resistor;) ,Short press PWRON key time is 100ms. .............................. 36
Table 4-7 RK809-1A Power up/down sequence(x:BUCK3 voltage determined by external
divided resistor；LDO3 start up later than LDO1 for about 200uS ) ,Short press PWRON
key time is 100ms. .................................................................................... 37
Table 4-8 RK809-5A Power up/down sequence(x:BUCK3 voltage determined by external
divided resistor;LDO3 start up later than LDO2 for about 200uS ) ,Short press PWRON
key time is 100ms. .................................................................................... 38
Table 4-9 RK809-6A Power up/down sequence(x:BUCK3 voltage determined by external
divided resistor; LDO3 start up later than LDO1 for about 200uS) ,Short press PWRON
key time is 100ms. .................................................................................... 38
Table 4-10 RK809-7A Power up/down sequence(x:BUCK3 voltage determined by external
divided resistor) ,Short press PWRON key time is 100ms. ............................... 39
Table 6-1 Thermal Resistance Characteristics .................................................... 125
Copyright ©2023 Rockchip Electronics Co., Ltd.
6
RK809 Datasheet
Rev 2.3
Warranty Disclaimer
Rockchip Electronics Co., Ltd makes no warranty, representation or guarantee (expressed, implied, statutory, or otherwise) by
or with respect to anything in this document, and shall not be liable for any implied warranties of non-infringement,
merchantability or fitness for a particular purpose or for any indirect, special or consequential damages.
Information furnished is believed to be accurate and reliable. However, Rockchip Electronics Co., Ltd assumes no responsibility
for the consequences of use of such information or for any infringement of patents or other rights of third parties that may
result from its use.
Rockchip Electronics Co., Ltd’s products are not designed, intended, or authorized for using as components in systems intended
for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which
the failure of the Rockchip Electronics Co., Ltd’s product could create a situation where personal injury or death may occur,
should buyer purchase or use Rockchip Electronics Co., Ltd’s products for any such unintended or unauthorized application,
buyers shall indemnify and hold Rockchip Electronics Co., Ltd and its officers, employees, subsidiaries, affiliates, and
distributors harmless against all claims, costs, damages, expenses, and reasonable attorney fees arising out of, either directly
or indirectly, any claim of personal injury or death that may be associated with such unintended or unauthorized use, even if
such claim alleges that Rockchip Electronics Co., Ltd was negligent regarding the design or manufacture of the part.
Copyright and Patent Right
Information in this document is provided solely to enable system and software implementers to use Rockchip Electronics Co.,
Ltd ’s products. There are no expressed or implied copyright licenses granted hereunder to design or fabricate any integrated
circuits or integrated circuits based on the information in this document.
Rockchip Electronics Co., Ltd does not convey any license under its patent rights nor the rights
of others.
All copyright and patent rights referenced in this document belong to their respective owners and
shall be subject to corresponding copyright and patent licensing requirements.
Trademarks
Rockchip and RockchipTM logo and the name of Rockchip Electronics Co., Ltd’s products are trademarks of Rockchip Electronics
Co., Ltd. and are exclusively owned by Rockchip Electronics Co., Ltd. References to other companies and their products use
trademarks owned by the respective companies and are for reference purpose only.
Confidentiality
The information contained herein (including any attachments) is confidential. The recipient hereby acknowledges the
confidentiality of this document, and except for the specific purpose, this document shall not be disclosed to any third party.
Reverse engineering or disassembly is prohibited.
ROCKCHIP ELECTRONICS CO., LTD. RESERVES THE RIGHT TO MAKE CHANGES IN ITS PRODUCTS OR PRODUCT
SPECIFICATIONS WITH THE INTENT TO IMPROVE FUNCTION OR DESIGN AT ANY TIME AND WITHOUT NOTICE
AND IS NOT REQUIRED TO UNDATE THIS DOCUMENTATION TO REFLECT SUCH CHANGES.
Copyright ©2023 Rockchip Electronics Co., Ltd.
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by
any means, electric or mechanical, by photocopying, recording, or otherwise, without the prior written consent of Rockchip
Electronics Co., Ltd.
Copyright ©2023 Rockchip Electronics Co., Ltd.
7
RK809 Datasheet
Rev 2.3
Chapter 1 Introduction
1.1 Overview
The RK809 is a complex power-management integrated circuit (PMIC) integrated
CODEC for multi-core system applications powered by an external power supply. The
RK809 can provide a complete power management solution with very few external
components.
The RK809 provides five fast load transient synchronous step-down converters. The
device also contains 9 LDO regulators, two switches and a battery fuel gauge. Powerup/power-down controller is configurable and can support any customized powerup/power-down sequences (OTP based). A real-time clock (RTC) is also integrated to
provide a 32.768-kHz output buffer, and real time function. The RK809 supports 32.768kHz clock generation based on a crystal oscillator. It also includes Audio CODEC , real
ground Head phone driver and ClassD driver.
The RK809 integrates four channels step-down DC-DC converters. All of them
adopt ripple base control to achieve very fast load transient response. Meanwhile, all of
them can dynamically adjust the output voltage, as required by the processor based on
the processor’s operation status so as to maximize the system efficiency. The output
voltages of most channels can be configured through the I2C interface. The inputs of all
channels have soft start function, which greatly reduces the inrush current at the startup.
2.5MHz switching frequency and good control method decrease the external inductance
and capacitance. The RK809 also integrate a peak current mode control high efficiency
buck converter, maximum current up to 2.5A, it’s usually used to power LDOs.
The RK809 integrates nine channels LDO regulators. The LDO3 is high PSRR (75dB
@1Khz) high accuracy low drop-out regulator. The inputs of all LDO regulators could be
decrease to 2V for high convert efficiency. The output voltages of all LDO regulators can
be configured through the I2C interface.
A “battery fuel gauge” is integrated in the RK809. Using the proprietary algorithms
and the sensed battery current and voltage, the gauge can accurately calculate the
battery capacity based on the charging/discharging characteristics of the battery
preloaded in the system. The gauge then sends the battery capacity information to the
processor through the I2C interface.
The RK809 also integrates complete audio system. The single end or differential
mode Micro-phone can be connected to RK809 through two AC-couple capacitors. 24bits ADC and gain adjustable PGA would convert the micro-phone signal to digital signal.
The sound recording path has very low THD (-75dB @1KHz@580mV source). 24 bits DAC
would convert digital signal to analog signal, and Class-AB driver adopt real-ground
structure for Head-phone application, has very low THD (-90dB @1KHz@-3dBFS source).
Meanwhile, Class-D driver integrated for speaker application. The speaker and headphone can be used at the same time. I2S interface is integrated to communicate with
processor.
The RK809 is available in a QFN68 7.0 mm x 7.0 mm package, with a 0.35-mm pin pitch.
Copyright ©2023 Rockchip Electronics Co., Ltd.
8
RK809 Datasheet
Rev 2.3
1.2 Feature
Input range: 2.7V - 5.5V
Low standby current of 35uA
Power channels:
BUCK1: 0.5V~2.4V, 2.5A max, very fast transient response
BUCK2: 0.5V~2.4V, 2.5A max, very fast transient response
BUCK3: 0.5V~2.4V (or resistor divider), 1.5A max, very fast transient response
BUCK4: 0.5V~3.4V, 1.5A max, very fast transient response
BUCK5: 1.5V~3.6V, 2.5 A max, fast transient response
LDO1~LDO2,LDO4~LDO9: 0.6V~3.4V, 400mA max
LDO3: high PSRR (75dB @ 1KHz), 0.6V~3.4V, 100mA max
Switch1: 2.1 A max, Rdson=90mΩ
Switch2: 2.1 A max, Rdson=100mΩ
OTP Programmable power up/down sequences and voltage
Accurate battery fuel gauge with two separate battery voltage and current ADC
16 bits ADC for battery voltage, battery temperature, USB/SYS voltage sense
16 bits ADC for battery current sense
OCV algorithm combine with Coulom-counter algorithm
Real time clock（RTC）
Audio System
Audio codec: 24bits for both ADC and DAC
Support single end or differential mode Micro-phone input
Support real ground class-AB PA to drive Head-phone, 32Ohm Load
Support class-D PA to drive speaker, 1.3W
Support I2S as the digital signal interface for both DAC and ADC
Support programmable digital and analog gains
Sample rate: 48KHz~192KHz
Integrates internal PLL
Support PDM mode(external input PCLK)
Package:7mmx7mm QFN68
Copyright ©2023 Rockchip Electronics Co., Ltd.
9
RK809 Datasheet
Rev 2.3
1.3 Block Diagram
VCC9
LDO1
VLDO1
400mA
VLDO2
400mA
Switch 1
VSWOUT1
LDO2
VCC5
VLDO3
BUCK5
Step-Down
2.5A
1.5~3.6V
DAC
LDO3
(low noise)
100mA
LDO3
FB5
VCC1
BUCK1
Step-Down
2.5A
0.5~2.4V
VLDO4
BUCK5
SW5
LDO4
400mA
DAC
SW1
BUCK1
FB1
VCC2
BUCK2
Step-Down
2.5A
0.5~2.4V
LDO5
VLDO5
400mA
DAC
SW2
BUCK2
FB2
VCC3
VCC6
LDO6
VLDO6
400mA
VLDO7
400mA
VLDO8
LDO8
400mA
BUCK3
Step-Down
1.5A
0.5~2.4V
DAC
LDO7
VFB=0.8V
VLDO9
VCC8
BUCK3
VBUCK3
VFB3
VCC4
BUCK4
Step-Down
1.5A
0.5~3.4V
DAC
VCC7
SW3
LDO9
400mA
SW4
BUCK4
FB4
INT
SLEEP
PWRON
EXT_EN
RESETB
VDC
Power
Sequence
Switch 2
Audio
VSWOUT2
CP_-2V3
CPP
CPN
VCC_CPVSS
LDO_2V3
VCC_1P8A
VCC_CPVDD
VCC_SPK_HP
SPKP_OUT
DAC/
HP/
CLASS-D
VCC_1P8D
VCC_RTC
ADC
XIN
PLL
32K OSC
RTC
XOUT
VLDO4
CLK32K
SCL
SDA
I2S
I2C
SPKN_OUT
HPR_OUT
HP_SNS
HPL_OUT
MIC1P
MIC1N
MCLK
BCLK
LRCLK
SDI
SDO/PDMDATA
PDMCLK
Battery Fuel Gauge
REFGND
R eference
VREF
IADC
VADC
SNSP
SNSN
BATDIV
Note: 1. The detail audio block diagram is shown at chapter “4.4
2. The I2S interface is internal pull high to VLDO4.
Fig. 1-1 RK809 Functional Block Diagram
Copyright ©2023 Rockchip Electronics Co., Ltd.
Audio System”.
10
RK809 Datasheet
Rev 2.3
2.1 1.4 Typical Application Diagrams
1uF
VSWOUT1
VSWOUT2
VSWOUT2
VSWOUT1
VCC_SYS
BUCK5
1uF
VCC9
VCC8
1uF
10uF
BUCK5
0.47uH/4A
1uF
SW5
VCC_SYS
33uF
VFB5
VCC5
VLDO1
1uF
VCC_SYS
VLDO1
VCC1
VLDO2
1uF
VLDO2
SW1
VLDO3
VCC_SYS
VCC6
VCC2
VLDO4
1uF
VLDO4
VLDO5
VCC_SYS
VCC3
BUCK5
VCC7
VLDO7
22uF
VBUCK3
VLDO8
82K
VFB3
VLDO9
1uF
120K
VLDO9
VCC_SYS
1uF
VCC4
VREF
GNDREF
22pF
10uF
BUCK4
0.47uH/3A
SW4
22pF
Optional
BUCK3
SW3
VLDO8
1uF
10uF
0.47uH/3A
VLDO7
1uF
33uF
VFB2
VLDO6
1uF
BUCK2
0.47uH/4A
VLDO6
1uF
10uF
SW2
VLDO5
1uF
33uF
VFB1
BUCK5
1uF
BUCK1
0.47uH/4A
VLDO3
1uF
10uF
XIN
22uF
VFB4
32.7 68K
XOUT
PWRON
PWRON
BUCK4
100nF
RK809
Optional 1
ADP_12V
10uF
Exposed GND
10uF
100K
Normal
ADP_5V
10K
SLEEP
INT
CLK32K
RESETB
VDC
22K
10K
BUCK4
100nF
AP
100nF
BATDIV
OVP
Option
4.7K
SNSP
SNSN
VLDO4
100nF
4.7K
SCL
SCL
SDA
PDMCLK
MCLK
BCLK
LRCLK
SDI
SDO/PDMDATA
SDA
10uF
2.2K
10K
EXT_EN
VCC_SYS
BUCK
12V-5V
VCC_IO
MIC1P
100nF
MIC1N
CPP
2.2K
HPR_OUT
HPL_OUT
HP_SNS
2.2uF
VCC_SYS
CPN
2.2uF
1uF
1uF
1uF
VCC_CPVSS
VCC_CPVDD
10uF
VCC_SPK
SPKR_OUT
VCC_1P8A
SPKL_OUT
VCC_1P8D
VCC_RTC
VCC_SYS
1uF
VCC_RTC must be the highest voltage in the RK809
Fig. 1-2 RK809 Typical Application Diagram for no battery
Copyright ©2023 Rockchip Electronics Co., Ltd.
11
RK809 Datasheet
Rev 2.3
VSWOUT2
1uF
VSWOUT1
VSWOUT2
VSWOUT1
BUCK5
1uF
VCC_SYS
VCC9
VCC8
1uF
10uF
BUCK5
0.47uH/4A
SW5
VCC_SYS
1uF
33uF
VFB5
VCC5
VLDO1
1uF
VCC_SYS
VLDO1
VCC1
VLDO2
1uF
VLDO2
SW1
VLDO3
VCC_SYS
VCC6
VCC2
VLDO4
1uF
VLDO4
VLDO5
VCC_SYS
VCC3
BUCK5
VCC7
22uF
VBUCK3
VLDO8
VLDO8
82K
VFB3
VLDO9
1uF
120K
VLDO9
VCC_SYS
1uF
VCC4
VREF
GNDREF
22pF
10uF
BUCK4
0.47uH/3A
SW4
22pF
Optional
BUCK3
SW3
VLDO7
1uF
10uF
0.47uH/3A
VLDO7
1uF
33uF
VFB2
VLDO6
1uF
BUCK2
0.47uH/4A
VLDO6
1uF
10uF
SW2
VLDO5
1uF
33uF
VFB1
BUCK5
1uF
BUCK1
0.47uH/4A
VLDO3
1uF
10uF
XIN
22uF
VFB4
32.768 K
XOUT
PWRON
VCC_RTC
1uF
PWRON
VCC_SYS
BUCK4
100nF
22uF
HVLDO
BUCK
5V
5V
RK809
10uF
10K
Power path /
Charger
Exposed GND
220K
VDC
22K
SLEEP
INT
CLK32K
RESETB
10K
BUCK4
100nF
100nF
BATDIV
100nF
20K
Close to RK809
SNSP
SNSN
10 mohm
VLDO4
2.2K
AP
4.7K
140K
Battery
pack
10K
EXT_EN
ADP_12V
ADP_12V
VCC_IO
100nF
4.7K
SCL
SCL
SDA
PDMCLK
MCLK
BCLK
LRCLK
SDI
SDO/PDMDATA
SDA
MIC1P
100nF
MIC1N
CPP
2.2K
HPR_OUT
HPL_OUT
HP_SNS
2.2uF
VCC_SYS
CPN
2.2uF
1uF
1uF
1uF
VCC_CPVSS
VCC_CPVDD
VCC_SPK
10uF
SPKR_OUT
VCC_1P8A
SPKL_OUT
VCC_1P8D
VCC_RTC
VCC_RTC
1uF
VCC_RTC must be the highest voltage in the RK809
Fig. 1-3 RK809 Typical Application Diagram for two battery
Copyright ©2023 Rockchip Electronics Co., Ltd.
12
RK809 Datasheet
Rev 2.3
Chapter 2 Package information
2.2 Ordering information
Orderable
Device
RoHS
status
Package
Package Detail
RK809-1
RoHS
QFN68 (7X7)
2000 pcs/ tape, 5 tapes/box，by reel
RK809-2
RoHS
QFN68 (7X7)
2000 pcs/ tape, 5 tapes/box，by reel
RK809-3
RoHS
QFN68 (7X7)
2000 pcs/ tape,5 tapes/box，by reel
RK809-5
RoHS
QFN68 (7X7)
2000 pcs/ tape,5 tapes/box，by reel
RK809-6
RoHS
QFN68 (7X7)
2000 pcs/ tape,5 tapes/box，by reel
RK809-7
RoHS
QFN68 (7X7)
2000 pcs/ tape,5 tapes/box，by reel
RK809-1A
RoHS
QFN68 (7X7)
2000 pcs/ tape,5 tapes/box，by reel
RK809-5A
RoHS
QFN68 (7X7)
2000 pcs/ tape,5 tapes/box，by reel
RK809-6A
RoHS
QFN68 (7X7)
2000 pcs/ tape,5 tapes/box，by reel
2.3 Top Marking
Rockchip
Rockchip : Brand Name
RK809-1
RKXXXX : Chip Name
ABCXXXXXX DEFG
ABC
: Subcontractor Code
XXXXXX : Die Lot NO #
DEFG : Date Code
The first pin
Copyright ©2023 Rockchip Electronics Co., Ltd.
13
RK809 Datasheet
Rev 2.3
Rockchip
Rockchip : Brand Name
RK809-2
RKXXXX : Chip Name
ABCXXXXXX DEFG
ABC
: Subcontractor Code
XXXXXX : Die Lot NO #
DEFG : Date Code
The first pin
Rockchip
Rockchip : Brand Name
RK809-3
RKXXXX : Chip Name
ABCXXXXXX DEFG
ABC
: Subcontractor Code
XXXXXX : Die Lot NO #
DEFG : Date Code
The first pin
Rockchip
Rockchip : Brand Name
RK809-5
RKXXXX : Chip Name
ABCXXXXXX DEFG
ABC
: Subcontractor Code
XXXXXX : Die Lot NO #
DEFG : Date Code
The first pin
Copyright ©2023 Rockchip Electronics Co., Ltd.
14
RK809 Datasheet
Rev 2.3
Rockchip
Rockchip : Brand Name
RK809-6
RKXXXX : Chip Name
ABCXXXXXX DEFG
ABC
: Subcontractor Code
XXXXXX : Die Lot NO #
DEFG : Date Code
The first pin
Rockchip
Rockchip : Brand Name
RK809-7
RKXXXX : Chip Name
ABCXXXXXX DEFG
ABC
: Subcontractor Code
XXXXXX : Die Lot NO #
DEFG : Date Code
The first pin
Rockchip
Rockchip : Brand Name
RK809-1A
RKXXXX : Chip Name
ABCXXXXXX DEFG
ABC
: Subcontractor Code
XXXXXX : Die Lot NO #
DEFG : Date Code
The first pin
Copyright ©2023 Rockchip Electronics Co., Ltd.
15
RK809 Datasheet
Rev 2.3
Rockchip
Rockchip : Brand Name
RK809-5A
RKXXXX : Chip Name
ABCXXXXXX DEFG
ABC
: Subcontractor Code
XXXXXX : Die Lot NO #
DEFG : Date Code
The first pin
Rockchip
Rockchip : Brand Name
RK809-6A
RKXXXX : Chip Name
ABCXXXXXX DEFG
ABC
: Subcontractor Code
XXXXXX : Die Lot NO #
DEFG : Date Code
The first pin
2.4 MSL Information
Moisture sensitivity Level ：MSL3
2.5 Lead Finish/Pin Material Information
Lead Finish/Pin Material ：Sn
2.6 Dimension
Copyright ©2023 Rockchip Electronics Co., Ltd.
16
RK809 Datasheet
Rev 2.3
Fig. 2-1 QFN687mm X 7mm
DESCRIPTION
SYMBOL
TOTAL THICKNESS
STAND OFF
MOLD THICKNESS
MATERIAL THICKNESS
A
A1
A2
A3
D
E
D1
E1
L
e
b
aaa
bbb
ccc
ddd
eee
fff
PACKAGE SIZE
EP SIZE
LEAD LENGTH
LEAD PITCH
LEAD WIDTH
LEAD OSITION OFFSET
LEAD COPLANARITY
PACKAGE EDGE PROFILE
MOLD FLATNESS
EP POSITION OFFSET
MIN
0.70
0
5.39
5.39
0.30
0.1
MILLIMETER
NOM
0.75
0.035
0.55
0.203REF
7BSC
7BSC
5.49
5.49
0.4
0.35BSC
0.15
0.07
0.08
0.10
0.10
0.10
0.05
MAX
0.80
0.05
0.57
5.59
5.59
0.50
0.2
Note:
1. Coplanarity applies to leads, corner leads and die attach pad.
2. Dimension b applies to metalized terminal and is measured between 0.15mm and 0.30mm from the
Copyright ©2023 Rockchip Electronics Co., Ltd.
17
RK809 Datasheet
Rev 2.3
terminal tip. If the terminal has the optional radius on the other end of the terminal, the dimension
b should not be measure in that radius area.
VCC8
BATDIV
SWOUT1
VCC9
SW5
PWRON
RESETB
VCC4
SW4
FB4
SNSN
SNSP
VDC
EXT_EN
FB5
SWOUT2
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
CLK32K
2.7 Pin Assignment
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
QFN68
7×7
ePAD
XOUT
XIN
SLEEP
VCC_1P8D
GNDREF
VREF
VCC_RTC
VCC_1P8A
MIC1P
MIC1N
HPR_OUT
HP_SNS
HPL_OUT
VCC_CPVDD
CPP
CPN
VCC_CPVSS
SDO/PDMDATA 18
PDMCLK 19
LDO3 20
LDO2 21
VCC5 22
LDO1 23
VCC3 24
SW3 25
VBUCK3 26
FB3 27
LDO4 28
LDO5 29
VCC6 30
LDO6 31
SPKP_OUT 32
VCC_SPK_HP 33
SPKN_OUT 34
SCL
SDA
LDO7
VCC7
LDO8
LDO9
INT
FB2
SW2
VCC2
VCC1
SW1
FB1
LRCLK
BCLK
MCLK
SDI
Fig. 2-2 Pin Assignment QFN7x7-68(Pitch=0.35mm)
2.8 Pinout Number Order
PIN NO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
PIN NAME
SCL
SDA
LDO7
VCC7
LDO8
LDO9
INT
FB2
SW2
VCC2
VCC1
SW1
FB1
LRCLK
BCLK
MCLK
SDI
SDO/PDMDATA
PDMCLK
LDO3
LDO2
VCC5
LDO1
PIN DESCRIPTION
I2C clock input
I2C data input and output
LDO7 output
Power supply of LDO7/8/9
LDO8 output
LDO9 output
Interrupt request pin, open drain
Output feedback voltage of buck2
Switching node of buck2
Power supply of buck2
Power supply of buck1
Switching node of buck1
Output feedback voltage of buck1
The I2S framing clock
The I2S bit clock
The I2S main clock input pin
The I2S DAC input data
The I2S ADC output data/PDM Data for the DSADC
PDM CLK for the DSADC OUTPUT
LDO3 output
LDO2 output
Power supply of LDO1/2/3
LDO1 output
Copyright ©2023 Rockchip Electronics Co., Ltd.
18
RK809 Datasheet
PIN NO
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
PIN NAME
VCC3
SW3
VBUCK3
FB3
LDO4
LDO5
VCC6
LDO6
SPKP_OUT
VCC_SPK_HP
SPKN_OUT
VCC_CPVSS
CPN
CPP
VCC_CPVDD
HPL_OUT
HP_SNS
HPR_OUT
MICIN
MICIP
VCC_1P8A
VCC_RTC
VREF
GNDREF
VCC_1P8D
SLEEP
XIN
XOUT
PWRON
53
54
55
56
57
58
59
60
61
SW5
VCC9
SWOUT1
BATDIV
VCC8
SWOUT2
FB5
EXT_EN
VDC
62
63
64
65
66
67
68
Exposed
pad
SNSP
SNSN
FB4
SW4
VCC4
RESETB
CLK32K
Exposed
ground
Rev 2.3
PIN DESCRIPTION
Power supply of buck3
Switching node of buck3
Output voltage of buck3
Output feedback voltage of buck3
LDO4 output
LDO5 output
Power supply of LDO4/5/6
LDO6 output
Positive speaker driver output
Power supply for speaker and charger pump
Negative speaker driver output.
Negative power supply for the headphone
Negative switching node of the charger pump
Positive switching node of the charger pump.
Positive power supply for the headphone
Left channel output of the headphone
Reference ground for the headphone
Right channel output of the headphone
Negative input of the Microphone
Positive input of the Microphone
Power supply for internal 1.8V analog circuit
Power supply filter
Internal reference voltage
Reference ground
Power supply for internal 1.8V digital circuit
Sleep mode control input
32.768KHz crystal oscillator input
32.768KHz crystal oscillator output
Power on key input, active low, internal 17k resistor pull high
to VCC_RTC
Switching node of BUCK5
Power supply of buck5 and SWOUT1
Power switch out 1
Divided voltage of positive battery
Power supply of SWOUT2
Power switch out 2
Output feedback voltage of buck5
Enable Signal for external high voltage BUCK
If it exceeds 0.55V for the first time, it will start the
PMIC(rising edge triggering start).And it is connected to the
divider of external power supply generally.
Bat charging and discharging sense current positive pin
Bat charging and discharging sense current negative pin
Output feedback voltage of buck4
Switching node of buck4
Power supply of buck4
Reset pin after power on, active low
32.768KHz clock output, open drain
Ground
Copyright ©2023 Rockchip Electronics Co., Ltd.
19
RK809 Datasheet
Rev 2.3
Chapter 3 Electrical Characteristics
3.1 Absolute Maximum Ratings
Parameter
Voltage range on pins SWOUTx, SWx,
VCC1~9,VCC_RTC,VCC_SPK_HP,LDOx, BATDIV,
FBx,VBUCK3,SPKP_OUT,SPKN_OUT
Voltage range on pin CLK32K,RESETB,
SLEEP,SCL,SDA,INT,PWRON,XIN,SOUT, VDC,EXT_EN
Voltage range on pins
LRCLK,BCLK,MCLK,SDI,SDO/PDMCLK,PDMCLK,
Voltage range on pins
SNSP,SNSN,VREF,VCC_1P8D,VCC_1P8A,MIC1N,MIC1P
Voltage range on pins HP_SNS,HPR_OUT,HPL_OUT
Voltage range on pins VCC_CPVDD,CPP
Voltage range on pins VCC_CPVSS,CPN
Storage temperature range, TS
Operating temperature range, TJ
Min
-0.3
Max
6.5
Units
V
-0.3
6.5
V
-0.3
6.5
V
-0.2
1.98
V
-2.7
-0.3
-2.7
-40
2.7
2.7
0.3
150
V
V
V
℃
-40
125
℃
300
℃
Maximum Soldering Temperature, TSOLDER
Note：
Exposure to the conditions exceeded absolute maximum ratings may cause the permanent
damages and affect the reliability and safety of both device and systems using the device. The
functional operations cannot be guaranteed beyond specified values in the recommended
conditions.
3.2 Recommended Operating Conditions
Parameter
Voltage range on pins VCC9
Power Dissipation
Min
TYP
Max
Units
3
5
5.5
2
V
W
3.3 DC Characteristics
Test conditions: VCC9=5.0V,TA=25°C for typical values, unless otherwise noted.
PARAMETERS
SYMBOL
Note
MIN TYP MAX UNIT
Power dissipation
Shut down Current
Power on current 1: All
bucks, LDOs, ADC power
on, Null load
Power on current 2:
buck1/buck4, LDO1/ldo2
power on, Null load
Power on and sleep
current: buck1/buck4,
LDO1/ldo2 power on, low
power mode, sleep
mode, Null load
Isd
35
40
uA
Iq1
1.9
mA
Iq2
0.65
mA
Isleep
0.19
mA
System Characteristics
VB_OK threshold, the
VCC9 voltage should be
Vok
2.8V~3.6V
by
Copyright ©2023 Rockchip Electronics Co., Ltd.
VB_OK_SEL[1:0]
=0b01
2.744
2.8
2.856
V
20
RK809 Datasheet
PARAMETERS
Rev 2.3
SYMBOL
higher than it to power
on the PMIC.
VB_UV threshold, when
the VCC9 voltage is
lower than it, The PMIC
would be shutdown.
Vuv
VB_LO threshold, when
the VCC9 voltage is
lower than it, The PMIC
would be shut down or
interrupt happen.
Vlo
VB_OV threshold, when
the VCC9 voltage is
higher than it, The PMIC
would be shutdown.
Vov
TSD threshold, when the
temperature is higher
than it, The PMIC would
be shutdown.
T warning threshold,
when the temperature is
higher than it, interrupt
happen.
Long press PWRON key
time
Short press PWRON key
time
Note
OTP
programmed
.
Tsd
Twa
Tlp
Tst
2.7V~3.4V
by I2C
programmed
. Typical is
2.7V.
2.8V~3.5V
by I2C
programmed
. Typical is
3.2V.
140/160℃
by I2C
programmed
. Typical is
160℃.
85~115℃ by
I2C
programmed
. Typical is
115℃.
6s~12s by
I2C
programmed
. Typical is
6s.
100ms/500m
s by I2C
programmed
and OTP
programed.
Typical is
500ms.
MIN
TYP
MAX
UNIT
VB_OK_SEL[1:0]
=0b00
2.94
3.0
3.06
V
VB_OK_SEL[1:0]
=0b10
3.332
3.4
3.468
V
VB_OK_SEL[1:0]
=0b11
3.546
3.6
3.654
V
2.646
2.7
2.754
V
2.94
3.0
3.06
V
3.332
3.4
3.468
V
2.744
2.8
2.856
V
3.136
3.2
3.264
V
3.43
3.5
3.57
V
5.8
6
6.2
V
TSD_TEMP=0b0
135
140
145
℃
TSD_TEMP=0b1
155
160
165
℃
80
85
90
℃
90
95
100
℃
100
105
110
℃
110
115
120
℃
VB_UV_SEL[2:0]
=0b000
VB_UV_SEL[2:0]
=0b011
VB_UV_SEL[2:0]
=0b111
VB_LO_SEL[2:0]
= 0b000
VB_LO_SEL[2:0]
= 0b100
VB_LO_SEL[2:0]
= 0b111
HOTDIE_TEMP[1
:0]=0b00
HOTDIE_TEMP[1
:0]=0b01
HOTDIE_TEMP[1
:0]= 0b10
HOTDIE_TEMP[1
:0]= 0b11
PWRON_LP_OFF
_TIME[1:0]=0b0
0
PWRON_LP_OFF
_TIME[1:0]=0b0
1
PWRON_LP_OFF
_TIME[1:0]=0b1
0
PWRON_LP_OFF
_TIME[1:0]=0b1
1
6
s
8
s
10
s
12
s
PWRON_ON_TIM
E=0b0
500
ms
PWRON_ON_TIM
E=0b1
100
ms
Test conditions: VCCx=5.0V,TA=25°C for typical values, unless otherwise noted.
PARAMETERS
SYMBOL
Note
MIN TYP MAX UNIT
BUCK1: Fast load transient response step-down converter
Input supply voltage
range
Output Voltage Accuracy @
Vcc1
Vfb1
2.7
0.5V~2.4V by I2C programmed.
Copyright ©2023 Rockchip Electronics Co., Ltd.
0.98
1.0
5.5
V
1.02
V
21
RK809 Datasheet
PARAMETERS
Rev 2.3
SYMBOL
Load Transient Response
L=0.47uH, Cout=32uF.
Rated output current
Switching Frequency
when CCM mode
Note
Vdrop1
Typical is 1.0V.
Step=12.5mV(0.5V~1.5V)
Step=100mV(1.5V~2.4V)
0.25A to 2.5A, 0.5A/uS, Vout=1V
Imax1
Fsw1
Vin-Vout>1.5V
all load @ all input voltage
range
Conversion Efficiency
(Vin=4.2V,Vout=1V)
MIN
TYP
MAX
20
2.5
2.25
2.5
Iout=2A
75
Iout=1A
82
Iout=0.3A
85
UNIT
mV
2.75
A
MHz
%
BUCK2: Fast load transient response step-down converter
Input supply voltage
range
Output Voltage Accuracy @
all load @ all input voltage
range
Load Transient Response
L=0.47uH, Cout=32uF.
Rated output current
Switching Frequency
when CCM mode
Vcc2
Vfb2
2.7
Vdrop2
0.5V~2.4V by I2C programmed.
Typical is 1.0V.
Step=12.5mV(0.5V~1.5V)
Step=100mV(1.5V~2.4V)
0.25A to 2.5A, 0.5A/uS, Vout=1V
Imax2
Fsw2
Vin-Vout>1.5V
Conversion Efficiency
(Vin=4.2V,Vout=1V)
0.98
1.0
5.5
V
1.02
V
20
2.5
2.25
2.5
Iout=2A
75
Iout=1A
82
Iout=0.3A
85
mV
2.75
A
MHz
%
BUCK3: Fast load transient response step-down converter
Input supply voltage
range
Feedback Voltage,
Default
Output Voltage Accuracy @
all load @ all input voltage
range
Load Transient Response
L=0.47uH, Cout=22uF.
Rated output current
Switching Frequency
when CCM mode
Conversion Efficiency
(Vin=4.2V,Vout=1.25V)
Vcc3
Vfb3
2.7
Vdrop3
Selection of external resistor
divider
If internal divide mode selected:
0.5V~2.4V by I2C programmed.
Typical is 1.25V.
Step=12.5mV (0.5V~1.5V)
Step=100mV (1.5V~2.4V)
0.15A to 1.5A, 0.5A/uS, Vout=1.25V
Imax3
Fsw3
Vin-Vout>1.5V
Vbuck3
5.5
V
0.784
0.8
0.816
V
1.225
1.25
1.275
V
17
1.5
2.25
2.5
Iout=1A
82
Iout=0.3A
83
mV
2.75
A
MHz
%
BUCK4: Fast load transient response step-down converter
Input supply voltage
range
Output Voltage Accuracy @
all load @ all input voltage
range
Load Transient Response
L=0.47uH, Cout=22uF.
Rated output current
Switching Frequency
when CCM mode
Conversion Efficiency,
(Vin=4.2V,Vout=3V)
Vcc4
Vfb4
2.7
Vdrop4
0.5V~3.4V by I2C programmed.
Typical is 3V.
Step=12.5mV (0.5V~1.5V)
Step=100mV (1.5V~3.4V)
0.15A to 1.5A, 0.5A/uS, Vout=3V
Imax4
Fsw4
Vin-Vout>1.5V
2.94
3
5.5
V
3.06
V
22
1.5
2.25
2.5
Iout=1A
92
Iout=0.3A
93
mV
2.75
A
MHz
%
LDO1
Copyright ©2023 Rockchip Electronics Co., Ltd.
22
RK809 Datasheet
Rev 2.3
PARAMETERS
SYMBOL
Input supply voltage
range
Output Voltage Accuracy @
all load @ all input voltage
range
Rated output current
Vcc5
Vldo1
Imaxl1
PSRR@ 1KHz
PSRR@ 10KHz
Note
MIN
TYP
2
0.6V~3.4V by I2C programmed.
Typical is 1V.
Step=25mV
Vcc5- Vldo1>0.4V
Vcc5- Vldo1>0.2V
Vin rms=200mV
Vin rms=200mV
0.98
1
MAX
UNIT
5.5
V
1.02
V
400
200
mA
mA
dB
dB
65
60
LDO2
Input supply voltage
range
Output Voltage Accuracy @
all load @ all input voltage
range
Rated output current
Vcc5
Vldo2
Imaxl2
PSRR@ 1KHz
PSRR@ 10KHz
2
0.6V~3.4V by I2C programmed.
Typical is 1.8V.
Step=25mV
Vcc5- Vldo2>0.4V
Vcc5- Vldo2>0.2V
Vin rms=200mV
Vin rms=200mV
1.764
1.8
5.5
V
1.836
V
400
200
mA
mA
dB
dB
65
60
LDO3: High PSRR LDO
Input supply voltage
range
Output Voltage Accuracy @
all load @ all input voltage
range
Rated output current
Vcc5
Vldo3
Imaxl3
PSRR@ 1KHz
PSRR@ 10KHz
2
0.6V~3.4V by I2C programmed.
Typical is 1V.
Step=25mV
Vcc5- Vldo3>0.4V
Vcc5- Vldo3>0.2V
Vin rms=200mV
Vin rms=200mV
0.98
1
5.5
V
1.02
V
100
50
mA
mA
dB
dB
75
70
LDO4
Input supply voltage
range
Output Voltage Accuracy @
all load @ all input voltage
range
Rated output current
Vcc6
Vldo4
Imaxl4
PSRR@ 1KHz
PSRR@ 10KHz
2
0.6V~3.4V by I2C programmed.
Typical is 3V.
Step=25mV
Vcc6- Vldo4>0.4V
Vcc6- Vldo4>0.2V
Vin rms=200mV
Vin rms=200mV
2.94
3
5.5
V
3.06
V
400
200
mA
mA
dB
dB
65
60
LDO5
Input supply voltage
range
Output Voltage Accuracy @
all load @ all input voltage
range
Rated output current
Vcc6
Vldo5
Imaxl5
PSRR@ 1KHz
PSRR@ 10KHz
2
0.6V~3.4V by I2C programmed.
Typical is 3V.
Step=25mV
Vcc6- Vldo5>0.4V
Vcc6- Vldo5>0.2V
Vin rms=200mV
Vin rms=200mV
2.94
3
5.5
V
3.06
V
400
200
mA
mA
dB
dB
65
60
LDO6
Input supply voltage
range
Output Voltage Accuracy @
all load @ all input voltage
range
Rated output current
Vcc6
Vldo6
Imaxl6
PSRR@ 1KHz
PSRR@ 10KHz
2
0.6V~3.4V by I2C programmed.
Typical is 3V.
Step=25mV
Vcc6- Vldo6>0.4V
Vcc6- Vldo6>0.2V
Vin rms=200mV
Vin rms=200mV
2.94
3
5.5
V
3.06
V
400
200
mA
mA
dB
dB
65
60
LDO7
Input supply voltage
range
Vcc7
Copyright ©2023 Rockchip Electronics Co., Ltd.
2
5.5
V
23
RK809 Datasheet
Rev 2.3
PARAMETERS
SYMBOL
Note
MIN
TYP
MAX
UNIT
Output Voltage Accuracy @
all load @ all input voltage
range
Rated output current
Vldo7
0.6V~3.4V by I2C programmed.
Typical is 2.8V.
Step=25mV
Vcc7- Vldo7>0.4V
Vcc7- Vldo7>0.2V
Vin rms=200mV
Vin rms=200mV
2.744
2.8
2.856
V
Imaxl7
PSRR@ 1KHz
PSRR@ 10KHz
400
200
65
60
mA
mA
dB
dB
LDO8
Input supply voltage
range
Output Voltage Accuracy @
all load @ all input voltage
range
Rated output current
Vcc7
Vldo8
Imaxl8
PSRR@ 1KHz
PSRR@ 10KHz
2
0.6V~3.4V by I2C programmed.
Typical is 1.8V.
Step=25mV
Vcc7- Vldo8>0.4V
Vcc7- Vldo8>0.2V
Vin rms=200mV
Vin rms=200mV
1.764
1.8
5.5
V
1.836
V
400
200
mA
mA
dB
dB
65
60
LDO9
Input supply voltage
range
Output Voltage Accuracy @
all load @ all input voltage
range
Rated output current
Vcc7
Vldo9
Imaxl9
PSRR@ 1KHz
PSRR@ 10KHz
2
0.6V~3.4V by I2C programmed.
Typical is 1.5V.
Step=25mV
Vcc7- Vldo9>0.4V
Vcc7- Vldo9>0.2V
Vin rms=200mV
Vin rms=200mV
1.47
1.5
5.5
V
1.53
V
400
200
mA
mA
dB
dB
65
60
BUCK5: High efficiency step-down converter
Input supply voltage
range
Output Voltage Accuracy @
all load @ all input voltage
range
Load Transient Response
L=0.47uH, Cout=44uF.
Rated output current
Switching Frequency
when CCM mode
Conversion Efficiency,
(Vin=4.2V,Vout=3.3V)
Vcc9
Vfb5
2.7
1.5V~3.6V by I2C programmed.
Typical is 3.3V.
Vdrop5
0.25A to 2.5A, 0.5A/uS, Vout=3V
Imax5
Fsw5
Vin-Vout>1.5V
3.234
2.5
1.8
3.3
2
Iout=2A
90
Iout=0.3A
92
5.5
V
3.366
V
40
mV
2.2
A
MHz
%
Swicth1
Input supply voltage
range
Rdson
Rated output current
Vcc9
2.7
5
90
Imax6
1A~2.1A by
I2C
programmed.
Typical is 2.1A.
SW1_ILIM[1:0]=
0b00
SW1_ILIM[1:0]=
0b01
SW1_ILIM[1:0]=
0b10
SW1_ILIM[1:0]=
0b11
V
mΩ
1
A
1.5
A
1.8
A
2.1
A
Swicth2
Input supply voltage
range of Boost
Rdson
Rated output current
Vcc8
2.7
100
Imax7
1A~2.1A by
I2C
programmed.
Typical is 2.1A.
Copyright ©2023 Rockchip Electronics Co., Ltd.
SW2_ILIM[1:0]=
0b00
SW2_ILIM[1:0]=
0b01
SW2_ILIM[1:0]=
0b10
5
V
120
mΩ
1
A
1.5
A
1.8
A
24
RK809 Datasheet
PARAMETERS
Rev 2.3
SYMBOL
Note
MIN
SW2_ILIM[1:0]=
0b11
TYP
MAX
UNIT
A
2.1
Test conditions: VCC9=5V, BAT_DIV=1.0V, TA=25°C for typical values, unless
otherwise noted.
A/D CONVERTER
Voltage measuring ADC
resolution
Voltage measuring ADC
accuracy
Range of SWOUT1 voltage
measurement
Range of BAT_DIV voltage
measurement
Range of SWOUT2 voltage
measurement
Range of TS voltage
measurement
Current measuring ADC
resolution
Current measuring ADC
accuracy
Range of Current ADC
measurement
Coulom-counter range
Coulom-counter accuracy
16
bits
-0.5%
+0.5%
%
1
6
V
0
1.2
V
1
6
V
0
1.2
V
16
MSB is sign bit
bits
ABS(Ibat)>0.2A
-0.5%
+0.5%
%
SNSP/SNSN sense
resistor=10mOhm
-5.625
5.625
A
+1
bits
%
32
ABS(Ibat)>0.2A
-1
Test conditions: VCC_SPK=5V, VCC9=5.0V, TA=25°C for typical values, unless
otherwise noted.
PARAMETERS
ClassD Audio PA
Input supply voltage range
THD+N
SYMBOL
Note
MIN
Vccspk
VCC_SPK_HP
1KHz,
Po=0.4Wrms,
VCC_SPK_HP
=3.8V
8 ohm load,
VCC_SPK_HP
=3.8V,
THD+N=1%
8 ohm load,
VCC_SPK_HP
=5V, THD+N=1%
8 ohm load,
VCC_SPK_HP
=5V,
THD+N=10%
217Hz,
VCC_SPK_HP
=200mVpkpk+3.8V,
VCC_SPK_HP
=3.8V
VCC_SPK_HP
=3.8V 0dB Gain,
8ohm, A-weighted
VCC_SPK_HP
=3.8V,0.4W,8ohm
2.7
RMS Power
PSRR
Output Offset Voltage
Noise Level
Efficiency
Copyright ©2023 Rockchip Electronics Co., Ltd.
TYP
MAX
UNIT
5.5
0.1
V
%
700
mW
1100
mW
1300
mW
65
dB
- 15
+ 15
mV
100
uV
88
%
25
RK809 Datasheet
PARAMETERS
Rev 2.3
SYMBOL
Note
MIN
with 68uH, 1KHz
No load,
VCC_SPK_HP
=3.8
Quiescent current
DAC to Head phone outputs
Full scale output level
Signal to Noise Ratio
SNR
Total Harmonic Distortion +
Noise
THD+N
RL=32ohm
RL=300ohm
A-weighted
RL=32ohm，60dBFS，
Fs=48KHz
A-weighted
RL=32ohm 3dBFS
Fs=48KHz
Micro-phone to ADC stereo input
Full sale input voltage
Input common voltage
VCOMN
A-weighted，60dBFS,Fs=48KH
z
A-weighted
997Hz -3dBFS
Differential input
signal, Fs=48KHz
SNR
THD+N
TYP
MAX
UNIT
4
mA
0.5
0.8
97
Vrms
Vrms
dB
-75
dB
0.8
Vrms
0.9
V
88
dB
-75
dB
Test conditions: BAT=4.0V, TA=25°C for typical values, unless otherwise noted.
PARAMETERS
SYMBOL
Note
MIN
TYP
MAX
UNIT
I2C interface (7bits I2C address is 0x20)
SCL clock frequency
fSCL
1000
KHz
VLDO4*
0.7
0.4
VCC_RT
C
V
V
VCC_1P
8D*0.7
VCC_RT
C
V
0.4
V
LOGIC INPUT
Input LOW-Level Voltage
Input HIGH-Level Voltage:
LRCLK,BCLK,MCLK,SDI,PDMCL
K
Input HIGH-Level Voltage:
SCL,SDA,SLEEP,PWRON,TS/GPI
O,GATE/GPIO,RESETB
VIL
VIH1
VIH2
LOGIC OUTPUT
LOW-Level
Output
Voltage,
VOL
Voltage,
VOH1
3.0 mA sink current
HIGH-Level
Output
3.0 mA source current:
V
VLDO40.4
VLDO4
LRCLK,BCLK,SDO/PDMDATA
HIGH-Level
Output
Voltage,
VOH2
3.0 mA source current:
C-0.4
TS/GPIO,GATE/GPIO
INTERNAL RC CLOCK
The frequency of RC
oscillator is 32.768 kHz
START UP SEQUE
2mS intervals between the
channels to start up
OPEN DRAIN OUTPUT PIN
Copyright ©2023 Rockchip Electronics Co., Ltd.
V
VCC_RT
VCC_RT
V
-20%
+20%
-20%
+20%
26
RK809 Datasheet
PARAMETERS
Rev 2.3
SYMBOL
Note
MIN
TYP
MAX
UNIT
CLK32K,RESETB,INT,SDA
Copyright ©2023 Rockchip Electronics Co., Ltd.
27
RK809 Datasheet
Rev 2.3
Chapter 4 Function Description
4.1 Top State Machine
4.1.1 State Machine Description
SLEEP
POWER ON disabled
Sleep disabled
OFF
POWER ON disabled
POWER ON enabled
Sleep enabled
ACTIVE
Fig. 4-1 State Machine
The RK809 state machine shown as above. The state shift by “power on”, “power down”,
“reset”, “active to sleep” and “sleep to active”.
4.1.2 Power on Description
There are three kinds of method to power on the PMIC.
Note that: When EXT_EN rising edge comes, the voltage of VCC9 must
be higher than VB_OK threshold during 1.5mS.
1. Press “PWRON” key
PWRON
T=500mS/100mS
EXT_EN
T=40mS
Vbuckx / Vldox
Vbuckx / Vldox
T=2mS
RESETB
Fig. 4-2 Press “PWRON” key to turn on the PMIC
When the PMIC powered by VCC9 which voltage is higher than “VB_OK” threshold,
keeping low level at “PWRON” pin for 500/100mS would turn on the PMIC. The “PWRON” pin
de-bounce time (500mS/100mS) can be adjusted by I2C.
All the power channels start up at the default output voltages with a preset power up
sequence, which has 2mS intervals between the channels. When the power up process is
Copyright ©2023 Rockchip Electronics Co., Ltd.
28
RK809 Datasheet
Rev 2.3
done, the RESETB turns to high logic level to inform the processor that all the power rails are
up and stable.
2. RTC Alarm
When the PMIC powered by VCC9 which voltage is higher than “VB_OK” threshold
(typical 3.4V), Setting RTC alarm would turn on the PMIC. The power on sequence is the
same with the first one.
For example, set RTC alarm registers: 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C. And then
set register 0x0F=2FH.
3. VDC voltage Rising-edge
When the PMIC powered by VCC9/VCC8, and then VDC plug in for 140mS, the PMIC
would be turn on. The power on sequence shown as below.
VDC
T=140mS
EXT_EN
T=40mS
Vbuckx / Vldox
Vbuckx / Vldox
T=2mS
RESETB
Fig. 4-3 VDC voltage Rising-edge to turn on the PMIC
4.1.3 Power down Description
There are 7 kinds of method to power down the PMIC.
1. Long press “PWRON” key
PWRON
T=6/8/10/12S
RESETB
T=2mS
Vbuckx / Vldox
Vbuckx / Vldox
……
Vbuckx / Vldox
T=6mS
Vsys
Fig. 4-4 Long press “PWRON” key to turn off the PMIC
When the PMIC work in the “ON” state or “SLEEP” state, Writing register bit
0xF7=”0”, and then keeping low level at “PWRON” pin for 6/8/10/12S would turn off the
PMIC. The “PWRON” pin de-bounce time (6/8/10/12S) can be adjusted by I2C.
When power down enable, The RESETB pin would be pulled low to reset the processor.
And then 2ms later, the power channels start to be turned off at the same time.
2. Write shutdown Register
When the PMIC work in the “ON” state or “SLEEP” state, writing register bit
0xF4=”1” would turn off the PMIC. The power off sequence is the same with the first
one.
Copyright ©2023 Rockchip Electronics Co., Ltd.
29
RK809 Datasheet
Rev 2.3
3. SYS over-voltage
When the PMIC work in the “ON” state or “SLEEP” state, if VCCRTC /VCC9 higher than
6V, the PMIC would be turn off. The power off sequence is the same with the first one.
4. SYS under-voltage
When the PMIC work in the “ON” state or “SLEEP” state, if VCCRTC/VCC9 lower than
VB_UV threshold (typical 2.7V) for 2mS, the PMIC would be turn off. For safe attention, the
buck converter would be shut down immediately when detect VB_UV.
VCCRTC/VCC9
V=2.7V
T=2mS
RESETB
T=60uS
T=2mS
Vbuckx
Vbuckx
Vldox
Vldox
T=2mS
EXT_EN
Fig. 4-5 VCC under-voltage to turn off the PMIC
This would lead to processor system halted. So, Writing register bit 0xC6=”1” can fix
this issue. The detail sequence will be found in “reset Description” chapter.
5. SYS low-voltage
When the PMIC work in the “ON” state or “SLEEP” state, if VCCRTC /VCC9 lower than
VB_LO threshold (typical 3.2V) for 2mS and Register bit 0XF1=”0”, the PMIC would be
turn off. The power off sequence is the same with the first one.
6. SLEEP pin active
When the PMIC work in the “ON” state or “SLEEP” state, if Register bit 0XF4=”10”,
and “SLEEP” pin active (the polarity can be programmed by Register bit 0XF4), the PMIC
would be turn off. The power off sequence is the same with the first one.
7. TSD protection
When the PMIC work in the “ON” state or “SLEEP” state, if the temperature is higher
than TSD threshold (typical 160 degree), the PMIC would be turn off. The power off sequence
is the same with the first one.
4.1.4 Reset Description
There are 4 kinds of method to reset the PMIC. If register bits 0xF4=”00”, reset
function means restart PMIC. If register bits 0xF4=”01”, reset function means reset
registers, all channels of power would be reset to default state.
1. Long press “PWRON” key
Copyright ©2023 Rockchip Electronics Co., Ltd.
30
RK809 Datasheet
Rev 2.3
PWRON
T=6/8/10/12S
RESETB
T=2mS
T=2mS
Vbuckx / Vldox
T=2mS
Vbuckx / Vldox
……
Vbuckx / Vldox
T=2mS
T=40mS
EXT_EN
Fig. 4-6 Long press “PWRON” key to restart the PMIC
When the PMIC work in the “ON” state or “SLEEP” state, Writing register bit
0xF7=”1”, and then keeping low level at “PWRON” pin for 6/8/10/12S would restart the
PMIC. The “PWRON” pin de-bounce time (6/8/10/12S) can be adjusted by I2C.
Note: If the VCC9 voltage is lower than VB_OK threshold, the PMIC would be shut down
but restart.
2. SLEEP pin active
When the PMIC work in the “ON” state or “SLEEP” state, if Register bit 0XF4=”11”,
and “SLEEP” pin active (the polarity can be programmed by Register bit 0XF4), the PMIC
would restart. The restart sequence is the same with the first one.
Note: If the VCC8/VCC9 voltage is lower than VB_OK threshold, the PMIC would be shut
down but restart.
Note: It should delay about 66uS after changing the “SLEEP” pin active each time.
3. RESETB pin pull low
When the PMIC work in the “ON” state or “SLEEP” state, if “RESETB” pin is pull down, the
PMIC would restart immediately. The restart sequence is the same with the first one.
Note: If the VCC9 voltage is lower than VB_OK threshold, the PMIC would be shut down
but restart.
4. SYS under-voltage
When the PMIC work in the “ON” state or “SLEEP” state, if VCC8/VCC9 lower than VB_UV
threshold (typical 2.7V) for 2mS, the PMIC would be turn off. But if register bit
0xC6=”1”, the “RESET” pin would be pull down when VB_UV happen. So, the PMIC
would restart.
Note: If the VCC9 voltage is lower than VB_OK threshold, the PMIC would be shut down
but restart.
Note: Users must NOT set register bits 0xF4=”01” at this case.
V=2.7V
VCC8/VCC9
T=60uS
T=40mS
RESETB
T=2mS
T=2mS
T=2mS
Vbuckx
……
Vbuckx
Vldox
……
T=2mS
EXT_EN
Copyright ©2023 Rockchip Electronics Co., Ltd.
31
RK809 Datasheet
Rev 2.3
Fig. 4-7 VCC under-voltage to restart the PMIC
4.1.5 Power Sequence Description
RK809-1
Maximum
output
Default
Start up
Range of output voltage
current
voltage
seque
BUCK1
0.5V-2.4V
2.5A
1.1V
2
BUCK2
0.5V-2.4V
2.5A
1.1V
2
1.5A
x
4
X(external divided resistor)
BUCK3
Or 0.5V-2.4v(internal divided
resistor)
BUCK4
0.5V-3.4V
1.5A
3.0V
5
LDO1
0.6V-3.4V
400mA
1.0V
2
LDO2
0.6V-3.4V
400mA
1.8V
3
LDO3
0.6V-3.4V
100mA
1.0V
2
LDO4
0.6V-3.4V
400mA
3.0V
5
LDO5
0.6V-3.4V
400mA
3.0V
5
LDO6
0.6V-3.4V
400mA
3.0V
5
LDO7
0.6V-3.4V
400mA
0.6V
OFF
LDO8
0.6V-3.4V
400mA
0.6V
OFF
LDO9
0.6V-3.4V
400mA
0.6V
OFF
BUCK5
1.5V-3.6V
2.5A
3.3V
1
SWOUT1
OFF
SWOUT2
OFF
VB_OK
2.8V-3.6V
x
2.8V
x
Table 4-1 RK809-1 Power up/down sequence(x:BUCK3 voltage determined by external divided resistor；LDO3
start up later than LDO1 for about 200uS ) ,Short press PWRON key time is 100ms.
RK809-2
Maximum
output
Default
Start up
Range of output voltage
current
voltage
sequence
BUCK1
0.5V-2.4V
2.5A
0.8V
2
BUCK2
0.5V-2.4V
2.5A
0.8V
2
1.5A
x
3
X(external divided resistor)
BUCK3
Or 0.5V-2.4v(internal divided
resistor)
Copyright ©2023 Rockchip Electronics Co., Ltd.
32
RK809 Datasheet
Rev 2.3
RK809-2
Maximum
output
Default
Start up
Range of output voltage
current
voltage
sequence
BUCK4
0.5V-3.4V
1.5A
3.3V
4
LDO1
0.6V-3.4V
400mA
0.8V
2
LDO2
0.6V-3.4V
400mA
1.8V
3
LDO3
0.6V-3.4V
100mA
0.8V
2
LDO4
0.6V-3.4V
400mA
1.8V
3
LDO5
0.6V-3.4V
400mA
0.6V
OFF
LDO6
0.6V-3.4V
400mA
0.6V
OFF
LDO7
0.6V-3.4V
400mA
0.6V
OFF
LDO8
0.6V-3.4V
400mA
3.3V
4
LDO9
0.6V-3.4V
400mA
3.3V
4
BUCK5
1.5V-3.6V
2.5A
3.3V
1
SWOUT1
OFF
SWOUT2
4
VB_OK
2.8V-3.6V
x
2.8V
x
Table 4-2 RK809-2 Power up/down sequence(x:BUCK3 voltage determined by external divided resistor; LDO3
start up later than LDO1 for about 200uS) ,Short press PWRON key time is 100ms.
RK809-3
Maximum
output
Default
Start up
Range of output voltage
current
voltage
sequence
BUCK1
0.5V-2.4V
2.5A
0.9V
2
BUCK2
0.5V-2.4V
2.5A
0.9V
4
1.5A
x
3
X(external divided resistor)
BUCK3
Or 0.5V-2.4v(internal divided
resistor)
BUCK4
0.5V-3.4V
1.5A
3.3V
5
LDO1
0.6V-3.4V
400mA
0.9V
2
LDO2
0.6V-3.4V
400mA
1.8V
3
LDO3
0.6V-3.4V
100mA
0.9V
2
LDO4
0.6V-3.4V
400mA
1.8V
3
LDO5
0.6V-3.4V
400mA
0.6V
OFF
LDO6
0.6V-3.4V
400mA
1.5V
3
Copyright ©2023 Rockchip Electronics Co., Ltd.
33
RK809 Datasheet
Rev 2.3
RK809-3
Maximum
output
Default
Start up
Range of output voltage
current
voltage
sequence
LDO7
0.6V-3.4V
400mA
3.0V
5
LDO8
0.6V-3.4V
400mA
3.3V
5
LDO9
0.6V-3.4V
400mA
3.3V
5
BUCK5
1.5V-3.6V
2.5A
3.3V
1
SWOUT1
OFF
SWOUT2
5
VB_OK
2.8V-3.6V
x
2.8V
x
Table 4-3 RK809-3 Power up/down sequence(x:BUCK3 voltage determined by external divided resistor; LDO3
start up later than LDO1 for about 200uS) ,Short press PWRON key time is 100ms.
RK809-5
Range of output
Maximum output
Default
Start up
voltage
current
voltage
sequence
BUCK1
0.5V-2.4V
2.5A
0.9V
1
BUCK2
0.5V-2.4V
2.5A
0.9V
2
1.5A
x
3
X(external divided
BUCK3
resistor)
Or 0.5V-2.4v(internal
divided resistor)
BUCK4
0.5V-3.4V
1.5A
0.5V
OFF
BUCK5
1.5V-3.6V
2.5A
1.8V
2
LDO1
0.6V-3.4V
400mA
0.6V
OFF
LDO2
0.6V-3.4V
400mA
0.9V
1
LDO3
0.6V-3.4V
100mA
0.9V
1
LDO4
0.6V-3.4V
400mA
0.6V
OFF
LDO5
0.6V-3.4V
400mA
3.3V
4
LDO6
0.6V-3.4V
400mA
3.3V
2
LDO7
0.6V-3.4V
400mA
1.8V
2
LDO8
0.6V-3.4V
400mA
1.8V
2
LDO9
0.6V-3.4V
400mA
0.6V
OFF
SWOUT1
3.3V
4
SWOUT2
3.3V
4
3.0V
x
VB_OK
2.8V-3.6V
Copyright ©2023 Rockchip Electronics Co., Ltd.
x
34
RK809 Datasheet
Rev 2.3
Table 4-4 RK809-5 Power up/down sequence(x:BUCK3 voltage determined by external divided resistor;LDO3
start up later than LDO2 for about 200uS ) ,Short press PWRON key time is 100ms.
RK809-6
Range of output
Maximum output
Default
Start up
voltage
current
voltage
sequence
BUCK1
0.5V-2.4V
2.5A
0.9V
2
BUCK2
0.5V-2.4V
2.5A
0.9V
2
1.5A
x
4
X(external divided
BUCK3
resistor)
Or 0.5V-2.4v(internal
divided resistor)
BUCK4
0.5V-3.4V
1.5A
3.3V
5
BUCK5
1.5V-3.6V
2.5A
3.3V
1
LDO1
0.6V-3.4V
400mA
0.9V
2
LDO2
0.6V-3.4V
400mA
1.8V
3
LDO3
0.6V-3.4V
100mA
0.9V
2
LDO4
0.6V-3.4V
400mA
3.3V
5
LDO5
0.6V-3.4V
400mA
3.3V
5
LDO6
0.6V-3.4V
400mA
3.3V
5
LDO7
0.6V-3.4V
400mA
0.6V
OFF
LDO8
0.6V-3.4V
400mA
0.6V
OFF
LDO9
0.6V-3.4V
400mA
0.6V
OFF
SWOUT1
OFF
SWOUT2
OFF
VB_OK
2.8V-3.6V
x
3.0V
10
Table 4-5 RK809-6 Power up/down sequence(x:BUCK3 voltage determined by external divided resistor; LDO3
start up later than LDO1 for about 200uS) ,Short press PWRON key time is 100ms.
RK809-7
Range of output
Maximum output
Default
Start up
voltage
current
voltage
sequence
BUCK1
0.5V-2.4V
2.5A
0.8V
3
BUCK2
0.5V-2.4V
2.5A
0.8V
3
1.5A
x
1
1.5A
1.8V
1
X(external divided
BUCK3
resistor)
Or 0.5V-2.4v(internal
divided resistor)
BUCK4
0.5V-3.4V
Copyright ©2023 Rockchip Electronics Co., Ltd.
35
RK809 Datasheet
Rev 2.3
RK809-7
Range of output
Maximum output
Default
Start up
voltage
current
voltage
sequence
BUCK5
1.5V-3.6V
2.5A
3.3V
1
LDO1
0.6V-3.4V
400mA
0.8V
2
LDO2
0.6V-3.4V
400mA
1.8V
4
LDO3
0.6V-3.4V
100mA
0.6V
4
LDO4
0.6V-3.4V
400mA
1.8V
5
LDO5
0.6V-3.4V
400mA
0.8V
4
LDO6
0.6V-3.4V
400mA
1.8V
5
LDO7
0.6V-3.4V
400mA
3.3V
4
LDO8
0.6V-3.4V
400mA
2.8V
5
LDO9
0.6V-3.4V
400mA
3.3V
5
SWOUT1
OFF
SWOUT2
OFF
VB_OK
2.8V-3.6V
x
2.8V
10
Table 4-6 RK809-7 Power up/down sequence(x:BUCK3 voltage determined by external divided resistor;) ,Short
press PWRON key time is 100ms.
RK809-1A
Maximum
output
Start up
Range of output voltage
current
Default voltage
sequence
BUCK1
0.5V-2.4V
2.5A
1.1V
2
BUCK2
0.5V-2.4V
2.5A
1.1V
2
1.5A
x
4
X(external divided resistor)
BUCK3
Or 0.5V-2.4v(internal divided
resistor)
BUCK4
0.5V-3.4V
1.5A
3.0V
5
LDO1
0.6V-3.4V
400mA
1.0V
2
LDO2
0.6V-3.4V
400mA
1.8V
3
LDO3
0.6V-3.4V
100mA
1.0V
2
LDO4
0.6V-3.4V
400mA
3.0V
5
LDO5
0.6V-3.4V
400mA
3.0V
5
LDO6
0.6V-3.4V
400mA
3.0V
5
LDO7
0.6V-3.4V
400mA
0.6V
OFF
Copyright ©2023 Rockchip Electronics Co., Ltd.
36
RK809 Datasheet
Rev 2.3
RK809-1A
Maximum
output
Start up
Range of output voltage
current
Default voltage
sequence
LDO8
0.6V-3.4V
400mA
0.6V
OFF
LDO9
0.6V-3.4V
400mA
0.6V
OFF
BUCK5
1.5V-3.6V
2.5A
3.3V
1
SWOUT1
OFF
SWOUT2
OFF
VB_OK
2.8V-3.6V
x
2.8V
x
Table 4-7 RK809-1A Power up/down sequence(x:BUCK3 voltage determined by external divided resistor；LDO3
start up later than LDO1 for about 200uS ) ,Short press PWRON key time is 100ms.
RK809-5A
Range of output
Maximum output
Default
Start up
voltage
current
voltage
sequence
BUCK1
0.5V-2.4V
2.5A
0.9V
1
BUCK2
0.5V-2.4V
2.5A
0.9V
2
1.5A
x
3
X(external divided
BUCK3
resistor)
Or 0.5V-2.4v(internal
divided resistor)
BUCK4
0.5V-3.4V
1.5A
0.5V
OFF
BUCK5
1.5V-3.6V
2.5A
1.8V
2
LDO1
0.6V-3.4V
400mA
0.6V
OFF
LDO2
0.6V-3.4V
400mA
0.9V
1
LDO3
0.6V-3.4V
100mA
0.9V
1
LDO4
0.6V-3.4V
400mA
0.6V
OFF
LDO5
0.6V-3.4V
400mA
3.3V
4
LDO6
0.6V-3.4V
400mA
3.3V
2
LDO7
0.6V-3.4V
400mA
1.8V
2
LDO8
0.6V-3.4V
400mA
1.8V
2
LDO9
0.6V-3.4V
400mA
0.6V
OFF
SWOUT1
3.3V
4
SWOUT2
3.3V
4
3.0V
x
VB_OK
2.8V-3.6V
Copyright ©2023 Rockchip Electronics Co., Ltd.
x
37
RK809 Datasheet
Rev 2.3
Table 4-8 RK809-5A Power up/down sequence(x:BUCK3 voltage determined by external divided resistor;LDO3
start up later than LDO2 for about 200uS ) ,Short press PWRON key time is 100ms.
RK809-6A
Range of output
Maximum output
Default
Start up
voltage
current
voltage
sequence
BUCK1
0.5V-2.4V
2.5A
0.9V
2
BUCK2
0.5V-2.4V
2.5A
0.9V
2
1.5A
x
4
X(external divided
BUCK3
resistor)
Or 0.5V-2.4v(internal
divided resistor)
BUCK4
0.5V-3.4V
1.5A
3.3V
5
BUCK5
1.5V-3.6V
2.5A
3.3V
1
LDO1
0.6V-3.4V
400mA
0.9V
2
LDO2
0.6V-3.4V
400mA
1.8V
3
LDO3
0.6V-3.4V
100mA
0.9V
2
LDO4
0.6V-3.4V
400mA
3.3V
5
LDO5
0.6V-3.4V
400mA
3.3V
5
LDO6
0.6V-3.4V
400mA
3.3V
5
LDO7
0.6V-3.4V
400mA
0.6V
OFF
LDO8
0.6V-3.4V
400mA
0.6V
OFF
LDO9
0.6V-3.4V
400mA
0.6V
OFF
SWOUT1
OFF
SWOUT2
OFF
VB_OK
2.8V-3.6V
x
3.0V
10
Table 4-9 RK809-6A Power up/down sequence(x:BUCK3 voltage determined by external divided resistor; LDO3
start up later than LDO1 for about 200uS) ,Short press PWRON key time is 100ms.
RK809-7A
Range of output
Maximum output
Default
Start up
voltage
current
voltage
sequence
BUCK1
0.5V-2.4V
2.5A
0.9V
1
BUCK2
0.5V-2.4V
2.5A
0.9V
2
1.5A
X
3
X(external divided
BUCK3
resistor)
Or 0.5V-2.4v(internal
divided resistor)
Copyright ©2023 Rockchip Electronics Co., Ltd.
38
RK809 Datasheet
Rev 2.3
RK809-7A
Range of output
Maximum output
Default
Start up
voltage
current
voltage
sequence
BUCK4
0.5V-3.4V
1.5A
0.5V
OFF
BUCK5
1.5V-3.6V
2.5A
3.3V
1
LDO1
0.6V-3.4V
400mA
0.6V
OFF
LDO2
0.6V-3.4V
400mA
0.9V
1
LDO3
0.6V-3.4V
100mA
0.6V
OFF
LDO4
0.6V-3.4V
400mA
0.6V
OFF
LDO5
0.6V-3.4V
400mA
0.6V
OFF
LDO6
0.6V-3.4V
400mA
3.3V
2
LDO7
0.6V-3.4V
400mA
1.8V
2
LDO8
0.6V-3.4V
400mA
1.8V
2
LDO9
0.6V-3.4V
400mA
0.6V
OFF
SWOUT1
OFF
SWOUT2
4
VB_OK
2.8V-3.6V
x
2.8V
9
Table 4-10 RK809-7A Power up/down sequence(x:BUCK3 voltage determined by external divided
resistor) ,Short press PWRON key time is 100ms.
4.1.6 Sleep Description
The RK809 could be set to SLEEP mode by two kinds of way.
1. Register bits 0xF4=”01”, and then Register bit 0xF4=”1”.
2. Register bits 0xF4=”01”, and then “SLEEP” pin active (the polarity can be
programmed by Register bit 0XF4)
When sleep mode, the power dissipation of RK809M would be decreased. Writing register
bits 0xB9=”11111”, 0xB9=”1”, 0xF3=”1”, 0xE3=”1” would be decrease
quiescent current further.
4.2 Power Channels
4.2.1 Buck Description
The RK809 provides four high current synchronous buck converters, which deliver up to
3A, 3A, 1.5A and 1.5A, respectively. An enhanced COT architecture is used, which improves
the transient response significantly. 2.5MHz switching frequency and good control method
decrease the external inductance and capacitance. All output voltages can be adjusted
dynamically during operation through DVS (Dynamic Voltage Scaling), which guarantees a
linear and gradual voltage ramping up and down. A complete set of protection functions, such
as short circuit protection, is implemented in the buck converters too.
For example, the BUCK1: Vout=1V, Vin=4V, L=0.47uH, Cout=32uF. Load Current
transient from 0.01A to 3A, the current slew rate is 3A/uS (using MOSFET transition). The
output voltage drop when load current rising edge is about 38mV, that is very good
Copyright ©2023 Rockchip Electronics Co., Ltd.
39
RK809 Datasheet
Rev 2.3
characteristics. The other bucks has the same architecture with BUCK1, so they have the
same load transient response characteristics.
Fig. 4-8 BUCK1 load transient rising edge
Fig. 4-9 BUCK1 load transient falling edge
If decreasing inductance to 0.33uH and increasing output capacitance to 44uF, the load
transient response characteristics would be better.
Fig. 4-10 BUCK1 load transient rising edge 2
Copyright ©2023 Rockchip Electronics Co., Ltd.
40
RK809 Datasheet
Rev 2.3
Fig. 4-11 BUCK1 load transient falling edge 2
Meanwhile, bucks converters have good efficiency characteristics. The test data shown as
below. All channels of buck output voltage set to default.
Efficiency @ Vout=1000mV
90.00%
Efficiency (%)
84.00%
78.00%
3300mV PFM
72.00%
4200mV PFM
5000mV PFM
66.00%
60.00%
0
500
1000
1500
2000
2500
Load Current (mA)
Fig. 4-12 BUCK1 efficiency curve when different input voltage
Efficiency @ Vout=1000mV
90.00%
Efficiency (%)
84.00%
78.00%
3300mV PFM
72.00%
4200mV PFM
66.00%
5000mV PFM
60.00%
0
500
1000
1500
2000
2500
Load Current (mA)
Fig. 4-13 BUCK2 efficiency curve when different input voltage
Copyright ©2023 Rockchip Electronics Co., Ltd.
41
RK809 Datasheet
Rev 2.3
Efficiency @ Vout=1250mV
90.00%
Efficiency (%)
86.00%
82.00%
3300mV
78.00%
4200mV
5000mV
74.00%
70.00%
0
500
1000
1500
Load Current (mA)
Fig. 4-14 BUCK3 efficiency curve when different input voltage
Efficiency @ Vout=3000mV
100.00%
Efficiency (%)
96.00%
92.00%
3300mV
88.00%
4200mV
5000mV
84.00%
80.00%
0
500
1000
1500
Load Current (mA)
Fig. 4-15 BUCK4 efficiency curve when different input voltage
The RK809 also integrates a buck5, adopt peak current mode control, which has good
performance in load transient response and efficiency.
Fig. 4-16 BUCK5 efficiency curve when different input voltage,Vout=3.3V
4.2.2 LDO Description
Copyright ©2023 Rockchip Electronics Co., Ltd.
42
RK809 Datasheet
Rev 2.3
The RK809 also integrates nine LDOs, with 8 LDOs (LDO1, LDO2, LDO4~LDO9)
capable of providing up to 400mA and one LDO3 providing maximum 100mA. The LDO3
is a low noise, high PSRR (75dB) LDO. All channels of LDO output capacitance could be
1.0uF that decreases the system cost. The parameters such as output voltage in the
different operating modes can be adjusted through the I2C interface.
4.3 Battery Gas Gauge
The RK809M provides an accurate battery fuel gauge. A 16-bits battery voltage ADC and
a 16-bits battery current ADC are integrated in the RK809M to collect the information on the
battery, such as battery voltage, etc. Using the proprietary algorithms and the information
collected by the ADC, the battery fuel gauge can accurately calculate the battery capacity
based on the charging/discharging characteristics of the battery preloaded in the system. The
gauge then sends the battery capacity information to the processor through the I2C interface.
Q 0 idt
Coulomb
SOC
Counter
Q max
Current
Sense
ΔQ
SOC
T?=ΔV/Δt main clk
1->main clk/2
PLL_OUTDIV_EN
enable PLL VCO output clock divide
0:disable 1:enable
PLL_VCO_BANDSEL
PLL VCO working band select
CODEC_APLL_CFG1
Address: Operational Base + offset (0x0043)
Copyright ©2023 Rockchip Electronics Co., Ltd.
72
RK809 Datasheet
Rev 2.3
Bit
Attr
Reset Value
7:6
RW
0x0
5:3
RW
0x0
2:0
RW
0x0
Description
PLL_RES_SEL
PLL filter resistor value select
PLL_CUR_SEL
PLL charge-pump working current select
PLL_POSDIV_L3
PLL feedback clock divide value select low 3
bits
CODEC_APLL_CFG2
Address: Operational Base + offset (0x0044)
Bit
Attr
Reset Value
7:0
RW
0x30
Description
PLL_POSDIV_H8
PLL feedback clock divide value select high 8
bits
CODEC_APLL_CFG3
Address: Operational Base + offset (0x0045)
Bit
Attr
Reset Value
7:0
RW
0x19
Description
PLL_PREDIV_BIT
PLL input clock pre-divide value select
CODEC_APLL_CFG4
Address: Operational Base + offset (0x0046)
Bit
Attr
Reset Value
7:4
RW
0x6
3:0
RW
0x5
Description
PLL_OUTDIV
PLL VCO output clock divide value select
outdiv: 00-> divide 5 01-> divide 10
10-> divide 3 11-> divide 6
outdiv: 00-> divide 3 01-> divide 1
10-> divide 2 11-> divide 1"
PLL_CLK_DIV
PLL divided ratio of PLL_HIGH_clk,
0000->divded 1 and 1111->divided 15
CODEC_APLL_CFG5
Address: Operational Base + offset (0x0047)
Bit
Attr
Reset Value
7:3
RW
0x00
2
RW
0x0
1
RW
0x0
Description
RESV
Reserved
PLL_RESET
reset the total PLL register
0:release reset 1:set reset
PLL_TEST
check the PLL internal VCO control voltage
0:disable 1:enable
Copyright ©2023 Rockchip Electronics Co., Ltd.
73
RK809 Datasheet
Rev 2.3
Bit
Attr
Reset Value
0
RW
0x1
Description
PLL_PWD
pll power down
0: PLL power up
1:PLL power down
CODEC_DI2S_CKM
Address: Operational Base + offset (0x0048)
Bit
Attr
Reset Value
7:4
RW
0x0
3
RW
0x0
2
RW
0x0
1
RW
0x0
0
RW
0x1
Description
SCK_DIV
F(mclk2x)/F(sclk) - 1
PDM_EN
I2S SDO output delta-sigma ADC 1bit data.
0:disable; 1:enable.
SCK_EN
i2ssclk clock enable, active in master mode.
0:disable 1:enable
SCK_P
sclk polarity
0: normal
1:inverted
I2S_TX_MST
I2S TX module as
0: slave mode 1: master mode
CODEC_DI2S_RSD
Address: Operational Base + offset (0x0049)
Bit
Attr
Reset Value
7:4
RW
0x0
3
RW
0x0
2:1
RW
0x0
0
RW
0x0
Description
RESV
Reserved
PDM_LR_SEL
0：L; 1：R
SCKD_RX
sclk divider for rxlrck generator
00:64 01:128 10:256(01 valid only if lrclk
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