DS5028E Datasheet, PDF (13/41 Pages) Richtek Technology Corporation – Integrated PMIC with 4-Channel Synchronous Buck Converters, 8 LDOs, and MTP Non-Volatile Memory for Industrial Applications

RT5028E
Application Information
The RT5028E is a highly-integrated solution for industrial
system including PMIC and memory system. The
RT5028E application mechanism and I²C compatible
interface are introduced in later sections. The system's
slave address is 0110111 (As SADDR = high) or
0111111(As SADDR = low).
PMIC - Power management system provides 8 low dropout
linear regulator and 4 high efficiency synchronous step-
down DC-DC converters. Power-On and Power-Off
sequences are control by PWRON and RESET input pins.
Detail time sequence control is described in Power ON/
OFF diagram. The I²C interface can program individual
regulator output voltage as well as on/off control and
voltage setting.
I²C Interface Timing Diagram
The RT5028E acts as an I²C -bus slave. The I²C-bus master
configures the settings for all function blocks by sending
command bytes to the RT5028E via the 2-wire I²C-bus.
The I²C timing diagrams are list in the following.
Read Function
Reading One Indexed Byte of Data from RT (With 1-Byte)
Acknowledge from RT
Acknowledge from RT
Acknowledge from RT
Acknowledge from Master
S
Slave Address
0A
Register Address
A Sr
Slave Address
1A
Data Byte
AP
R/W
Repeated Start
Reading n Indexed Words of Data from RT (With N-Byte)
Acknowledge from RT
Acknowledge from RT
R/W
Acknowledge from RT
1Byte
S
Slave Address
0A
Register Address
A Sr
Slave Address
1A
R/W
Repeated Start
R/W
Acknowledge from Master
Data Byte
Acknowledge from Master
A
Data Byte
A ……
Acknowledge from Master
Data Byte
Acknowledge from Master
A
Data Byte
AP
1st Byte
2nd Byte
(n-1)th Byte
nth Byte
Write Function
Writing One Byte of Data to RT (With 1-Byte)
Acknowledge from RT
Acknowledge from RT
S
Slave Address
0A
Register Address
A
R/W
Writing n Bytes of Data to RT (With N-Byte)
Acknowledge from RT
Acknowledge from RT
S
Slave Address
0A
Register Address
A
R/W
Acknowledge from RT
Data Byte
AP
1Byte
Acknowledge from RT
Data Byte
A
1st Byte
Acknowledge from RT
Data Byte
A
Acknowledge from RT
Data Byte
A…
2nd Byte
Acknowledge from RT
Data Byte
AP
(n-1)th Byte
nth Byte
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS5028E-00 October 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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