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  Richtek Technology Electronic Components Datasheet  

RT5002C Datasheet

7 + 1 Channel DC/DC PMU

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®
RT5002C
7 + 1 Channel DC/DC PMU with Li-Ion Battery Charger for DSC
General Description
The RT5002C is a complete power supply solution for
digital still cameras and other handheld devices. It includes
a 7+1 channel DC/DC power converter unit, a single-cell
Li-ion battery charger, and an I2C control interface.
The power converter unit includes one synchronous step-
up converter and three synchronous step-down converters
for DSP core, I/O, Motor, and memory power supply, one
synchronous high voltage step-up converter and one
asynchronous inverting converter for CCD± bias, one
WLED driver in either synchronous high voltage step-up
or current source operation, and one low quiescent LDO
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, over-load, and
under voltage protection.
The battery charger includes Auto Power Path
Management (APPM). No external MOSFETs are required.
The charger enters 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 with an external resistor
and modified via the I2C control interface. The scope that
the battery regulation voltage can be modified via the I2C
interface depends on the battery temperature. 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.
Features
Power Converter Unit :
One Channel LV Sync Step-Up and Three Channel
LV Sync Step-Down
Up to 95% Efficiency
One Sync Step-Up and One Async Inverting for
CCD± bias
One WLED Driver in either Sync Step-Up or Current
Source Operation
WLED Driver with Dimming Control
Step-Up Mode with LED Open Protection (OVP7)
One Low Quiescent LDO with Reverse Leakage
Prevention for RTC Power Supply
Preset On/Off Sequence of CH1, CH2, CH3, CH4
(1 3 4 2)
Three Preset On/Off Sequences of CH5, CH6 (5 6,
6 5, and 5/6 at the same time)
Simplified Application Circuit
Input Power
Chip Enable
I2C Control
VIN SYS
RT5002C
PVD1
LX2
EN1234
LX3
LX4
PVD5
SCL
SDA
VOUT6
PVD7
RTCPWR
GND BAT
System Power
Step-Up For Motor
Step-Up/Down for I/O
Step-Down for DDR II
Step-Down for Core
HV Step-Up for CCD
HV Inverting for CCD
Step-Up for LED Backlight
LDO for RTC
Battery
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS5002C-00 January 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT5002C Datasheet

7 + 1 Channel DC/DC PMU

No Preview Available !

RT5002C
All Power Switches Integrated with Internal
Compensation
All Step-Up Converters with Load Disconnect
Wake Up Impulse to Monitor BAT and VIN Plug-In
Charger Unit :
28V Maximum Rating for VIN Power
Selectable Power Current Limit (0.1A / 0.5A / 1.5A)
Auto Power Path Management (APPM) and
Integrated Power MOSFETs
Battery Charging Current Control
Battery Regulation Voltage Control
Programmable Charging Current and Safe Charge
Timer
Under Voltage and Over Voltage Protection
Charge Status Indicator
Optimized Charge Rate via Thermal Feedback
Interrupt Indicator to Fault/Status Events
I2C Control Interface : Support Fast Mode up to
400kb/s
Small 40-Lead WQFN Package
RoHS Compliant and Halogen Free
Ordering Information
RT5002C
Package Type
QW : WQFN-40L 5x5 (W-Type)
Lead Plating System
Z : ECO (Ecological Element with
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.
Marking Information
RT5002C
ZQW
YMDNN
RT5002CZQW : Product Number
YMDNN : Date Code
Applications
DSC
Pin Configurations
(TOP VIEW)
40 39 38 37 36 35 34 33 32 31
INT 1
30
FB1 2
29
VDDM 3
28
FB7 4
27
PVD7 5
LX7 6
GND
26
25
CHG 7
24
LX4 8
PVD4 9
23
41
22
FB4 10
21
11 12 13 14 15 16 17 18 19 20
WAKE
FB2
TSSEL
LX5
PVD5
FB5
EN1234
LX3
PVD3
FB3
WQFN-40L 5x5
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
www.richtek.com
2
is a registered trademark of Richtek Technology Corporation.
DS5002C-00 January 2013


Part Number RT5002C
Description 7 + 1 Channel DC/DC PMU
Maker Richtek
Total Page 30 Pages
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