RT5035A Datasheet, PDF (1/44 Pages) Richtek Technology Corporation – Channel DC-DC Converters

RT5035A/B
7+3 Channel DC-DC Converters with RTC and I²C Interface
General Description
RT5035A/B is a highly-integrated DSC Power
Management IC that contains 7ch switching DC-DC
converters and two generic LDOs, one keep-alive
low-quiescent LDO for RTC, one load switch with
soft-start control and current limit, a switch with reverse
leakage prevention for backup battery, and a
Real-Time-Clock (RTC) including time counter and
32768Hz oscillator. The DC-DC converters are one
low-voltage Step-Up operated in either Async-PFM or
Sync-PWM, one current mode Sync Step-Up/Down
(Buck-Boost), four Sync Step-Down, and one Asyn
Step-Up for WLED driver. All power MOS are
integrated. And compensation networks are built in.
RT5035A/B uses I²C interface to set power-on and
power-off timing, output voltage, and WLED current
and dimming level, and also access RTC time counters
and oscillator fine-tuning. RT5035A/B dedicate for
CMOS image sensor application by providing one Sync
Step-Down, one LDO, and one load switch. The
RT5035A/B also provides rich protection functions
include Over-Current Protection, Under-Voltage
Protection, Over-Voltage Protection, Over-
Temperature Protection, and Over-Load Protection.
RT5035A/B is available in WQFN-40L 5x5 package.
Applications
 Digital Cameras
 Portable Instruments
Features
 CH1 Sync Step-Up in PWM Mode or Async
Step-Up in Pulse Frequency Mode
 CH2 Current Mode Sync Step-Up/Down
 CH3/CH4/CH5 Current Mode Sync Step-Down
 SW4 Load Switch with Soft-Start Inrush Control
And Current Limit
 CH6 Generic Low Voltage LDO for CMOS Sensor
 CH7 WLED Driver in Async Step-Up Mode
 Open LED Protection
 32 Dimming Levels
 CH8 Generic Low Voltage LDO for Multiple
Purpose Power Supply
 CH9 Keep-Alive Low-Quiescent LDO
 CH10 Sync Step-Down or Async Step-down in
Pulse Frequency Mode for Memory Standby
Mode Application
 LV Sync Step-Down DC-DC Converter High
Efficiency Up to 95%
 100% (Max) Duty Cycle for CH3, CH4, CH5 &CH10
 I²C Control Interface to Program Enable, Power
On/Off Delay Time, Output Regulated Voltage,
WLED Dimming Current
 RTC Timer And Oscillator
 Fixed 2MHz Switching Frequency for CH1, CH3,
CH4, CH5, CH10
 Fixed 1MHz Switching Frequency for CH2, CH7
Simplified Application Circuit
I²C Control
RT5035A/B
BAT
VOUT1
VOUT2
VDDM
VOUT3
VOUT4
SCL
SDA
C32K
EN
SYNC
RESET
SWO
VOUT5
VOUT6
LX7
VOUT8
RTCPWR
VOUT10
GND
Step-Up for Motor
Step-Up/Down for I/O
Step-Down for Core
Step-Down for CMOS
Load Switch for CMOS
Step-Down for CMOS
LDO for CMOS
Step-Up for LED Backlight
LDO for HDMI
LDO for RTC
Step-Down for Memory
Copyright © 2017 Richtek Technology Corporation. All rights reserved.
DS5035A/B-02 February 2017
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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