RT5035C/D
Operation
The RT5035C/D is a highly integrated DSC power
management IC that contains 7-CH switching DC-DC
converters, two generic LDO, one Keep Alive low
quiescent LDO, one load switch with soft-start control
and current limit, one switch with reverse leakage
prevention from backup battery, and a Real-Time Clock
(RTC) that includes a time counter and a 32768Hz
oscillator.
CH1 : Step-Up DC-DC Converter
CH1 is a step-up converter for motor driver power in
DSC system. The converter operates at asynchronous
PFM or fixed frequency PWM current mode which can
be set by the I
2
C interface.
CH2 : Synchronous Step-Up / Down DC-DC
Converter CH2 is a synchronous step-up / down
converter for system I/O power. The converter operates
at fixed frequency PWM Current Mode.
CH3 : Synchronous Step-Down DC-DC Converter
CH3 is suitable for core power in DSC system. The
converter operates in fixed frequency PWM mode with
integrated internal MOSFETs, FB resistors and
compensation network. The CH3 also can be adjusted
output voltage if I
2
C is set to use the external resistor.
CH4 : Synchronous Step-Down DC-DC Converter
CH4 is suitable for memory power in DSC system. The
converter operates in fixed frequency PWM mode with
integrated internal MOSFETs, FB resistors and
compensation network.
CH5 : Synchronous Step-Down DC-DC Converter
The converter operates in fixed frequency PWM mode
with integrated internal MOSFETs, FB resistors and
compensation network. The CH5 also can be adjusted
output voltage if I
2
C is set to use the external resistor.
CH6 : Generic LDO
CH6 is a generic low voltage LDO for multiple purpose
power.
CH7 : WLED Driver
CH7 is a WLED driver that can support 6WLED/30mA,
and it can setting OVP threshold, dimming current level
and power on/off by I
2
C interface.
CH8 : Generic LDO
CH8 is a generic low voltage LDO for multiple purpose
power.
CH9 : Keep Alive LDO and RTC
The RT5035C/D provides a 3.1V output LDO for all IC
control circuits and real time clock.
VNEG Charge Pump
The Charge pump is to increase the Vgs driving of big
P-MOSFET in CH2/3/4/5/10. When BAT < 3.6V and
one of CH2/3/4/5/10 turns on, VNEG charge pump will
turn on and start to pump.
Load Switch (SW4)
The Load Switch is equipped with soft-start inrush
control and current limit function (SW4).
CH10 : Synchronous Step-Down DC-DC Converter
CH10 is suitable for memory power in DSC system.
The converter operates at asynchronous PFM or fixed
frequency PWM current mode which can be set by the
I
2
C interface and it integrated internal MOSFETs, FB
resistors and compensation network. The CH10 also
can be adjusted output voltage if I
2
C is set to use the
external resistor.
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is a registered trademark of Richtek Technology Corporation.
www.richtek.com
6
DS5035C/D-01
February 2020
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
