Power Management Unit Total Power Solution for SSD - Richtek
RT5086D
Power Management Unit Total Power Solution for SSD
General Description
The RT5086D is a total power management solution for
SSD (Solid State Drive) and applicable the dedicated
powered by 3.3V or 5V input. The RT5086D provides
six step-down converters, is designed to be flexible
PMIC for supporting different output load applications
with regulated power sequence.
Features
?
?
? CH1
? CH2
: 0.9V to 1.575V in 25mV Step & 1.8V,
Output 1A Max.
power and DRAM power. It supports dynamic voltage
scaling by a dedicated I2C interface and also apply low
power mode to minimize the standby power
consumption.
? CH3
Solid State Devices
? CH6
: 0.7V to 1.3V in 25mV step, Output 4A Max.
2MHz CH5 1MHz CH6 2.5MHz Default
Switching Frequency
? 1.1V to 1.65V with 2MHz & 3V to 3.6V with 1MHz
Default Switching Frequency (CH4)
? 2MHz
Default Switching Frequency and
? CH2/3
Ordering Information
RT5086D
Package Type
WSC : WL-CSP-56B 3.19x3.59 (BSC)
?
Programmable 0.8 to 2.3MHz (CH1)
VSEL0 & VSEL1 & VSEL2 & VSEL3
?
Programmable Default Output Voltage
Low Power Mode (LPM) for Ultra Low Quiescent
?
Current
High-Speed
?
Outputs
POR Threshold Selection and Open-Drain POR
?
Indicator
Power Sequence Control During Startup
Note :
?
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
?
SuiTable for use in SnPb or Pb-free soldering processes.
DS5086D-00
February 2019
I2C Interfaces
for
for Programming
?
OVP, UVP, UVLO
Thermal Shutdown Protection
?
CH1/4/5 Bypass Mode & Buck Mode
?
Copyright ? 2019 Richtek Technology Corporation. All rights reserved.
: 0.9V to 2.1V in 50mV Step, Output 1.5A
Max.
? CH4 : 1.1V to 1.65V & 3V to 3.6V in 50mV Step,
Output 2A Max.
? CH5 : 1.4V to 3.6V in 100mV Step, Output 1A
Max.
Applications
Richtek products are :
: 2.3V to 3.45V in 50mV Step, Output 4A
Max.
The RT5086D provides configurable outputs for core
power of SSD controller, NAND Flash memory, I/O
?
Supply Input Voltage Range : 2.9V to 5.5V
Six High Efficiency, Low Voltage Buck Converters
? Up to 85% Efficiency at 10mA, and at Half Rated
Output Current
is a registered trademark of Richtek Technology Corporation.
1
RT5086D
Pin Configuration
Marking Information
(TOP VIEW)
A1
A2
A3
A4
A5
A6
A7
A8
NC
SCL
SDA
AGND
AVDD
NC
POR
NC
B3
B4
B5
B6
B7
B8
B1
B2
VSEL2
VSEL3
C1
C2
FB1 PORSEL VSEL0 VSEL1 PGND6 PGND6
D1
D2
LX1
C6
C7
C8
FB6
LX6
LX6
D7
D8
C3
PGND1 PGND1 PGND1
LX1
PVIN6 PVIN6
E1
E2
E7
E8
PVIN1
PVIN1
PGND5
FB5
F7
F8
F1
F2
FB2
PGND2
G1
G2
PGND5 PGND5
G3
H1
H2
H3
LX2
FB3
PVIN3
J2
J3
J1
PVIN2 PVIN3
G7
G8
PGND5
LX5
H7
H8
G6
PGND2 PGND2 PGND3/4
NC
RT5086D
WSC
YMDNN
RT5086DWSC : Product Number
YMDNN : Date Code
FB4
H4
H5
H6
LX3 PGND3/4 LX4
J4
J5
PVIN4 PVIN5
J7
J8
PVIN4
NC
J6
LX3 PGND3/4 LX4
WL-CSP-56B 3.19x3.59 (BSC)
Functional Pin Description
Pin No.
Pin Name
Pin Function
A1, A6, A8, J1, J8
NC
No internal connection.
A2
SCL
I2C interface clock signal.
A3
SDA
I2C interface data signal.
A4
AGND
Analog ground.
A5
AVDD
Analog power input for control logic.
A7
POR
Power on reset information.
When AVDD > VPORTH, POR = high level.
When AVDD < VPORTH ¨C 100mV, POR = low level.
B1
VSEL2
Power rails default voltage select pin 2.
This pin must be connected to AVIN or Ground externally.
B2
VSEL3
Power rails default voltage select pin 3.
Pull down resistance 1.5M? typ.
B3
FB1
CH1 buck converter output voltage feedback input.
B4
PORSEL
POR threshold voltage select.
B5
VSEL0
Power rails default voltage select pin 2.
Pull down resistance 1.5M? typ.
B6
VSEL1
Power rails default voltage select pin 1.
Pull down resistance 1.5M? typ.
B7, B8
PGND6
CH6 buck converter power ground.
C1, C2, C3
PGND1
CH1 buck Converter Power Ground.
Copyright ? 2019 Richtek Technology Corporation. All rights reserved.
2
is a registered trademark of Richtek Technology Corporation.
DS5086D-00
February 2019
RT5086D
Pin No.
Pin Name
Pin Function
C6
FB6
CH6 buck converter output voltage feedback input.
C7, C8
LX6
CH6 buck converter switched output.
D1, D2
LX1
CH1 buck converter switched output.
D7, D8
PVIN6
CH6 buck converter input.
E1, E2
PVIN1
CH1 buck converter input.
E7, F7, F8, G7
PGND5
CH5 buck converter power ground.
E8
FB5
CH5 buck converter output voltage feedback input.
F1
FB2
CH2 buck converter output voltage feedback input.
F2, G1, G2
PGND2
CH2 buck converter power ground.
G3, H5, J5
PGND3/4
CH3 and CH4 buck converter power ground.
G6
FB4
CH4 buck converter output voltage feedback input.
G8
LX5
CH5 buck converter switched output.
H1
LX2
CH2 buck converter switched output.
H2
FB3
CH3 buck converter output voltage feedback input.
H3, J3
PVIN3
CH3 buck converter input.
H4, J4
LX3
CH3 buck converter switched output.
H6, J6
LX4
CH4 buck converter switched output.
H7, J7
PVIN4
CH4 buck converter input.
H8
PVIN5
CH5 buck converter input.
J2
PVIN2
CH2 buck converter input.
Copyright ? 2019 Richtek Technology Corporation. All rights reserved.
DS5086D-00
February 2019
is a registered trademark of Richtek Technology Corporation.
3
RT5086D
Functional Block Diagram
AVDD
CH4
CH1
PVIN4
PVIN1
LX4
PGND4
FB4
LX1
1.1V to 1.65V
&
3V to 3.6V
2A
PGND1
2.3V to 3.45V
4A
CH2
CH5
PVIN5
PVIN2
LX5
LX2
PGND5
FB5
1.4V to 3.6V
1A
CH6
Power Control
0.9V to 1.575V
& 1.8V
1A
PGND2
FB2
CH3
PVIN3
PVIN6
LX3
LX6
PGND3
PGND6
FB6
FB1
0.7V to 1.3V
4A
0.9V to 2.1V
1.5A
I2C
POR
Voltage
Select
POR Select
FB3
SCL
SDA
VSEL0
VSEL1
VSEL2
VSEL3
PORSEL
AGND
Copyright ? 2019 Richtek Technology Corporation. All rights reserved.
4
is a registered trademark of Richtek Technology Corporation.
DS5086D-00
February 2019
RT5086D
Operation
The RT5086D provides six synchronous Buck
regulators to satisfy the entire power system of SSD.
This device can communicate with processors through
I2C interface for programming the voltage, monitoring
the status, or in/out the power saving mode.
Buck Converter
The RT5086D incorporates six high-efficiency
synchronous switching Buck converters that deliver
various voltages. CH1 features peak current mode
architecture of Buck converter. For preventing the
unstable when duty > 50% traditionally, it adds external
ramp and compensation to reduce duty cycle
perturbation and stabilize the current loop. CH1 can
operate up to 100% duty to let the lowest input voltage
still maintain the regulator work. And the output voltage
will be the lowest input voltage decreases dropout
voltage on the resistance of current path. Unlike CH1,
the control scheme of other buck converters are
constant-on-time current mode for low output voltage,
quick transient response. The buck converters have a
full set of protection.
Buck Over-Current Protection
The buck converters provides over current protection
by detecting low-side MOSFET valley inductor current
for CH2 to CH6 and by detection high-side MOSFET
peak current for CH1. If the sensed inductor current is
over the current limit threshold, the OCP will be
triggered. When OCP is tripped, the buck converter will
keep the over current threshold level until the over
current condition is removed.
Buck Output Over Voltage Protection
The output voltages are continuously monitored for
over voltage protection. If the output voltage exceeds
120% of the reference, over voltage protection is
triggered and then the high-side and low-side MOSFET
will turn off. The power MOS will keep turn off until the
over voltage condition is removed.
Over-Temperature Protection
If the temperature of the buck converter is over 150¡ãC,
the OTP circuit acts and makes all power rails
shutdown. They recover back with power-up sequence
when the temperature of PMIC is low to 125¡ãC.
VSEL0, VSEL1, VSEL2, VSEL3
The RT5086D applies twelve set default output
voltages for all power rails when the device starts a
power up sequence.
PORSEL
PORSEL is a logic pin to select the threshold voltage of
AVDD to raise POR signal. If AVDD voltage is over the
threshold voltage, the device starts a POR rising
function. When set PORSEL = 1, the threshold voltage
of AVDD is 3.8V, else the threshold voltage is 2.8V.
POR
POR pin is a signal to inform the system that the power
up sequence of the RT5086D is completed. If AVDD
voltage is larger than the POR rising threshold voltage,
the POR will go high with a timing delay. If AVDD
voltage is less than POR falling threshold voltage, the
POR falls right away.
Buck Under Voltage Protection
The output voltages are continuously monitored for
under voltage protection. If the output voltage falls
below 60% of the reference voltage, under voltage
protection is triggered and then the high-side and
low-side MOSFET will turn off. The UVP circuit will turn
off all rails and latched. The way to cannel the latched
behavior is to re-give AVDD power of the RT5086D.
Copyright ? 2019 Richtek Technology Corporation. All rights reserved.
DS5086D-00
February 2019
is a registered trademark of Richtek Technology Corporation.
5
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