DC/DC Converters. RT5035B Datasheet

RT5035B Converters. Datasheet pdf. Equivalent

RT5035B Datasheet
Recommendation RT5035B Datasheet
Part RT5035B
Description 7+3 Channel DC/DC Converters
Feature RT5035B; RT5035A/B 7+3 Channel DC/DC Converters with RTC and I2C Interface General Description RT5035A/B is.
Manufacture Richtek
Datasheet
Download RT5035B Datasheet




Richtek RT5035B
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 © 2016 Richtek Technology Corporation. All rights reserved.
DS5035A/B-01 April 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1



Richtek RT5035B
RT5035A/B
Ordering Information
RT5035A/B
Package Type
QW : WQFN-40L 5x5 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
A : Li-ion
B : 2AA Alkaline
Note :
Richtek products are :
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Pin Configurations
(TOP VIEW)
40 39 38 37 36 35 34 33 32 31
LX1 1
RESET 2
30
29
FB7 3
28
VOUT6 4
27
PVDD6 5
LX7 6
GND
26
25
LX4 7
24
PVDD4/10 8
LX10 9
23
41
22
VNEG 10
21
11 12 13 14 15 16 17 18 19 20
LX3
PVDD8
VOUT8
VOUT5/FB5
PVDD5
LX5
PVDD2
LX2A
EN
LX2B
Marking Information
RT5035AGQW
RT5035A
GQW
YMDNN
RT5035AGQW : Product Number
YMDNN : Date Code
WQFN-40L 5x5
RT5035BGQW
RT5035B
GQW
YMDNN
RT5035BGQW : Product Number
YMDNN : Date Code
Functional Pin Description
Pin No.
Pin Name
Pin Function
1 LX1
Switch Node of CH1. This pin is in high impedance during shutdown.
2 RESET
Open drain output port to assert the status of monitored VDDM voltage.
3 FB7
Feedback input pin for CH7. This pin is in high impedance during shutdown.
4 VOUT6
Regulated output node of CH6 generic LDO. When turning off, RT5035A/B would
discharge CH6 output capacitors internally till VOUT6 < 0.1V. This pin is in high
impedance during shutdown.
5 PVDD6
Power Input of CH6 Generic LDO. This pin is in high impedance during
shutdown.
6 LX7
Switch Node of CH7. This pin is in high impedance during shutdown.
7 LX4
Switch Node of CH4. This pin is in high impedance during shutdown.
Copyright © 2016 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS5035A/B-01 April 2016



Richtek RT5035B
Pin No.
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
RT5035A/B
Pin Name
Pin Function
PVDD4/10
Power input pin of CH4 and CH10. This pin is in high impedance during
shutdown.
LX10
Switch Node of CH10. This pin is in high impedance during shutdown.
VNEG
Output node of Negative Charge Pump to enhance CH2 (PVDD2 LX2A), CH3,
CH4, CH5, CH10 PMOS driving. The regulated voltage is the higher one
between (BAT 4.5V) and (BAT). When the Negative Charge Pump is off,
VNEG is internally connected to GND. Connect this pin to an external 1F
capacitor.
CN
Negative Switch node of Charge Pump. A fly capacitor is needed between pin
CP and CN.
CP Positive Switch node of Charge pump.
BAT
Battery power input and sense pin. Recommend that input bypass capacitors are
as close as possible to the IC. The IC would sense the voltage of this pin for
UVLO and perform body-diode direction control of CH1 PMOS switches. This pin
is also the power input pin of negative charge pump circuit for VNEG.
VOUT4/SWI
VOUT10/FB10
SWO
SDA
SCL
Sense pin for CH4 output voltage and power pin for load switch SW4. When
turning off, RT5035A/B would discharge CH4 output capacitors internally till
VOUT4 < 0.1V. Recommend that output capacitors are as close to RT5035A/B
as possible. This pin is in high impedance during shutdown.
Sense Pin of CH10 Output Voltage. This pin is also the feedback pin for VOUT10
if I2C is set to use the external resistor. When turning off, the IC discharges CH10
output capacitors internally until VOUT10 < 0.1V. Recommend that output
capacitors are as close as possible to the IC. This pin is in high impedance
during shutdown.
Power switch output pin of load switch SW4. When turning off, RT5035A/B would
discharge SWO output capacitors internally. This pin is in high impedance during
shutdown.
Data Input and output Pin for the I2C Serial Port.
Clock Input Pin for the I2C Serial Port.
VOUT2
SEQ
Power output pin for CH2 output voltage. When turning off, RT5035A/B would
discharge CH2 output capacitors internally till VOUT2 < 0.1V.
I2C interface power level must be equal to CH2 output voltage. This pin is in high
impedance during shutdown.
Sequence Setting pin.
LX2B
Switch Node B of CH2. This pin is in high impedance during shutdown.
EN
Enable input pin to activate the RT5035A/B power on (EN = High) and off.
RT5035A/B includes an internal pull-low at EN pin.
LX2A
Switch Node A of CH2. This pin is in high impedance during shutdown.
PVDD2
Power input pin of CH2 and it must connect to the same node as BAT. This pin is
in high impedance during shutdown.
LX5 Switch Node of CH5. This pin is in high impedance during shutdown.
PVDD5
Power input pin of CH5. PVDD5 could be separated from BAT. And the logic low
level for PMOS is automatically selected. (VNEG or GND) This pin is in high
impedance during shutdown.
Copyright © 2016 Richtek Technology Corporation. All rights reserved.
DS5035A/B-01 April 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3







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