DC/DC PMU. RT5021 Datasheet

RT5021 PMU. Datasheet pdf. Equivalent

RT5021 Datasheet
Recommendation RT5021 Datasheet
Part RT5021
Description 6 + 3 Channels DC/DC PMU
Feature RT5021; ® RT5021 6 + 3 Channels DC/DC PMU with Li-ion Battery Charger for CMOS DSC/DV General Description .
Manufacture Richtek
Datasheet
Download RT5021 Datasheet




Richtek RT5021
®
RT5021
6 + 3 Channels DC/DC PMU with Li-ion Battery Charger
for CMOS DSC/DV
General Description
The RT5021 is a complete power supply solution for digital
still cameras and other hand held devices. The RT5021 is
composed of a multi-channel DC/DC power converter unit,
a single-cell linear Li-ion battery charger, a charger type
detector, and an I2C control interface.
The power converter unit includes one synchronous step-
up converter (CH1), one synchronous step-up/down
converter (CH2), three synchronous step-down converters
(CH3/4/5), two LDOs with input power as low as 1.5V
(CH6/8), one WLED driver in synchronous high-voltage
step-up mode or low-voltage current regulator mode (CH7),
and a keep-alive LDO (CH9) for RTC application. All
converters are internally frequency compensated and
integrate power MOSFETs. The power converter unit
provides complete protection functions : over current,
thermal shutdown, over voltage, and under voltage
protection. RT5021 has a WAKEUP impulse generation
circuitry to monitor VIN or BAT installation event. To fulfill
most of applications, RT5021 has six preset power on/off
sequences.
The battery charger includes Auto Power Path
Management (APPM). No external MOSFETs are required.
The charger can enter sleep mode when power is removed.
Charging tasks are optimized by using a control algorithm
to vary the charge rate, including pre-charge mode, fast
charge mode and constant voltage mode. The charge
current can also be programmed via the I2C control
interface. The battery regulation voltage and current can
be adjusted by JEITA standard temperature control or other
schemes set via the I2C interface. The internal thermal
feedback circuitry regulates the die temperature to optimize
the charge rate for all ambient temperatures. The charging
task will always be terminated in constant voltage mode
when the charging current reduces to the termination
current of 10% x ICHG_FAST. The charger includes under
voltage and over voltage protection for the supply input
voltage, VIN. The charger includes USB charger detection
circuitry via D+ and D- pins of USB interface to detect
USB standard downstream ports (SDP), USB charging
downstream port (CDP), dedicated charger port (DCP),
or Apple/Sony charger ports. RT5021 uses some
indicators to show charger states : two open drain ports
CHG and CHG2, and an interrupt (INT) to immediately notify
the state change.
RT5021 has I2C interface to control rich functions of Power
Converter Unit and Charger Unit. The RT5021 is available
in the WQFN-40L 5x5 package.
Simplified Application Circuit
Adapter/USB
System Power
I2C Control
VIN
SYS
SCL
SDA
GND
RT5021
BAT
PVD1
VO2
LX3
LX4
LX5
VO6
PVD7
VO8
VRTC
Charger for Battery
Step-Up for Motor
Step-Up/Down for I/O
Step-Down for Core
Step-Down for Memory
Step-Down
LDO
Step-Up for LED Backlight
LDO
LDO for RTC
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS5021-01 April 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1



Richtek RT5021
RT5021
Features
Power Converter Unit
z CH1 LV Sync Step-Up
` Support Up to 1A Loading, DVS (Dynamic Voltage
Scaling), Load-Disconnect, Up to 95% Efficiency,
PSM/PWM Selectable
z CH2 LV Sync Step-Up/Down
` Support Up to 1A Loading, DVS, Up to 95%
Efficiency, PSM/PWM Selectable
z CH3/4 LV Sync Step-Down
` Support Up to 1.3A Loading, DVS, Up to 95%
Efficiency, 100% (MAX) Duty Cycle, PSM/PWM
Selectable
z CH5 LV Sync Step-Down
` Support Up to 0.6A Loading, Up to 95% Efficiency,
100% (MAX) Duty Cycle
` Output Voltage can be Selected from Preset List
or Set by External Feedback Network
z CH6 Low Input Power LDO
` VIN Range 1.5V to 5.5V
` Output Voltage Level Selectable in I2C Register
z CH7 WLED Driver in Either Sync Step-Up Operation
or Current Regulator Operation
` Step-Up Mode with LED Open Protection (OVP7
16V or 25V, Selectable in I2C Register)
` Step-Up Mode Support Series 2 to 6 WLED and
Load Disconnect Function
` Current Regulator Mode for 1 WLED
` 31 WLED Dimming Levels
` Automatic Mode Selection by External Circuit
Topology
z CH8 Generic LDO
` VIN Range 1.5V to 5.5V
` Output Voltage Level Selectable in I2C Register
z CH9 Low Quiescent LDO with Reverse Leakage
Prevention for RTC Power Supply
` Fixed 3.05V Output
z Six Preset Power On/Off Sequences by One Pin
SEQ
` SEQ # 0 : CH2CH3CH4
` SEQ # 1 : CH1CH3CH2CH4
` SEQ # 2 : CH1CH3CH4CH2
` SEQ # 3 : CH1CH2CH4CH3
` SEQ # 4 : CH1CH4CH3CH2
` SEQ # 5 : CH1CH4CH2CH3
z All Power Switches Integrated with Internal
Compensation
z Discharge Output of Every Channels when Turning
Off
z Wake Up Impulse to Monitor BAT and VIN Plug-In
z Fixed 2MHz Switching Frequency for CH1/3/4/5,
Fixed 1MHz Switching Frequency for CH2/7
Charger Unit
z 28V Maximum Rating for VIN Power
z Selectable Power Input Current Limit (0.1A / 0.5A /
1A / 1.5A)
z Auto Power Path Management (APPM) with
Integrated Power MOSFETs
z Battery Charging Current Control and Regulation
Voltage Control
z Programmable Charging Current and Safe Charge
Timer
z Optimized Charge Rate Via Thermal Feedback
z Under Voltage Protection, Over Voltage Protection
z Charger Status and VIN Power GOOD Indicators
z Interrupt Indicator to JEITA Temperature/Fault/
Status Events when PMU is Enabled
` Battery Temperature Events
` Battery Removing Event
` Charger in Thermal Regulation Control
` Safety Timer Timeout
` End of Charging
` VIN Power Good
` VIN < DPM Threshold 4.35V
` Charger Type Detection Finishing
z Charger Type Detection
` Dedicated Charger : Support Apple and Sony
Charger
` Secondary Charger Detection to Distinguish CDP
and DCP
z I2C Control Interface : Support Fast Mode up to
400kb/s
z Small 40-Lead WQFN Package
z RoHS Compliant and Halogen Free
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS5021-01 April 2013



Richtek RT5021
Applications
z DSC Power Supply System
z CMOS-Sensor DV
z Portable Instruments
Ordering Information
RT5021
Package Type
QW : WQFN-40L 5x5 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
RT5021
Pin Configurations
(TOP VIEW)
40 39 38 37 36 35 34 33 32 31
WAKE 1
30
PVD1 2
29
LX1 3
28
CHG2 4
27
FB7 5
PVD7 6
GND
26
25
LX7 7
24
CHG 8
VO6 9
41 23
22
PVD6 10
21
11 12 13 14 15 16 17 18 19 20
VP
TS
FB3
PVD2
LX2A
LX2B
VO2
FB2
VO8
SCL
WQFN-40L 5x5
Marking Information
RT5021GQW : Product Number
RT5021
GQW
YMDNN
YMDNN : Date Code
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS5021-01 April 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)