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| DS5028E Datasheet, PDF (15/41 Pages) Richtek Technology Corporation – Integrated PMIC with 4-Channel Synchronous Buck Converters, 8 LDOs, and MTP Non-Volatile Memory for Industrial Applications | |||
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PMIC - POWER ON/OFF Setting
The circuit setting for communication between the
RT5028E and AP is showed as below.
VIN
RT5028E
State
Machine
SCL
SDA
IRQ
RESET
PWRHOLD
REBOOT
MTP
MASK_GPIO
SADDR
PWRON
ENL1 to ENL8
ENB1 to ENB4
SADDR
MASK_GPIOMTP
AGND
AP As SADDR connect ot AGND
slave address
=0111111
As SADDR connect ot VIN
slave address
=0110111
As MASK_GPIO connect ot
AGND
EN pins can control.
As MASK_GPIO connect ot VIN
Ignore all EN pins.
As MTP connect ot AGND
Inhibit to write MTP.
As MTP connect ot VIN
Permit to write MTP.
Power Hold Function
When the âPWRHOLDâ signal does not come during
THOLD time, the RT5028E will do shutdown sequence.
If users want to disable power hold function, set
âDisTHOLDâ bit in I2C register 10 bit[0] to disable this
function. In the timing diagram below, the âTHOLDâ and
âRESET_DLYâ can be set by MTP program.
START_TIME
PWRON
BUCK1
â¦â¦
BUCK4
LDO1
â¦â¦
LDO8
RESET
PWRHOLD Always Low
RESET_DLY
THOLD
Turn off sequence :
First-on-last-Off
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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