RT5112A
Sequence (7 slots)
Note :
Registers 0x00[6:4]/ 0x06[6:4] are used to control
Buck1/Buck2 sequence on/off slot.
(1) Any changes in Sequence (7 slots), slot interval
time and soft-start time during sequence on or off
procedure is not valid and will not modify the RT5112A
setting.
Registers 0x01[6:4], 0x02[6:4], 0x03[6:4] and
0x04[6:4] are used to control LDOs sequence on/off
slots.
(2) Channel setting (output voltage, current limit...etc.)
is fixed during on or off sequence.
Slot Interval Time
Register 0x09[7:6] is used to control interval time
between each slot.
(3) Register 0x09[5:4] = 11 will turn off all channels
immediately.
Soft Start Time
(4) HWEN= 0 will turn off all channels and the RT5112A
enters into power down mode.
Register 0x09[7:6] is used to control Bucks sequence
on soft start time.
Normal Control Setting
Register 0x11[1:0] is used to control LDOs sequence
on soft start time.
When register bits 0x09[5:4] = 10, the Bucks and LDOs
on/off control depends on channel Enable bit.
Sequence Control
Registers 0x00[7]/0x06[7] are used to control Bucks
on/off.
Register 0x09[5:4] = 00 is used to enable sequence
off with sequence setting 000.
Register 0x01[7], 0x02[7], 0x03[7] and 0x04[7] are
used to control LDOs on/off.
Register 0x09[5:4] = 01 is used to enable sequence
on with sequence setting000.
HWEN
BUCK1_DELAY
LDOX_DELAY
SEQ_CTRL = 10
SEQ_CTRL = 01
SEQ_CTRL = 00
SLOT1
SLOT2
SLOT3
SLOT4
SLOT5
SLOT6
SLOT7
SLOT7
SLOT6
SLOT5
SLOT4
SLOT3
SLOT2
SLOT1
BUCK1
LDO1
LDO2
LDO3
LDO4
Figure 1.
Example for sequence on/off with BUCK1 assign to SLOT1, LDO1 assign to SLOT2, LDO2 assign to SLOT3, LDO3
assign to SLOT4 and LDO4 assign to SLOT5.
Copyright 2019 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS5112A-02 August 2019
www.richtek.com
23
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
