RT9911 Datasheet, PDF (1/32 Pages) Richtek Technology Corporation – 6 Channel DC/DC Converters

RT9911
6 Channel DC/DC Converters
General Description
The RT9911 is a complete power-supply solution for digital
still cameras and other hand-held devices. It integrates
one selectable Boost/Buck DC-DC converter, one high-
efficiency step-down DC-DC converter, one high-efficiency
main step-up converter, one PWM converter for CCD
positive voltage, one inverter for CCD negative voltage and
one white LED driver for LCD backlight. The RT9911 is
targeted for applications that use either two or three primary
cells or a single lithium-ion battery.
RT9911 is available in VQFN-40L 6x6. Each DC-DC converter
has independent shutdown input.
Ordering Information
RT9911
Package Type
QV : VQFN-40L 6x6 (V-Type)
--
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Note :
Richtek Pb-free and Green 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.
`100% matte tin (Sn) plating.
Applications
z Digital Still Camera
z PDA
z Protable Device
Features
z 1.6V to 5.5V Battery Input Voltage Range
z Synchronous Boost/Buck Selectable DC-DC
Converter
`Internal Switches
`Up to 95% Efficiency
z Syn-Buck DC-DC Converters
`0.8V to 5.5V Adjustable Output Voltage
`Up to 95% Efficiency
`100%_(MAX) Duty Cycle
`Internal Switches
z Main Boost DC-DC Converter
`Adjustable Output Voltage
`Up to 97% Efficiency
z PWM Converter for CCD Positive Voltage
z Inverter for CCD Negative Voltage
z White LED Driver for LCD Panel Backlight
z Up to 1.4MHz Adjustable Switching Frequency
z 1μA Supply Current in Shutdown Mode
z External Compensation Network for all Converters
z Independent Enable Pin to Shutdown Each
Channel.
z 40-Lead VQFN Package
z RoHS Compliant and 100% Lead (Pb)-Free
Pin Configurations
(TOP VIEW)
40 39 38 37 36 35 34 33 32 31
GND 1
OK2 2
RT 3
30 LX2
29 PGND2
28 FB3
VREF 4
27 COMP3
VDDM 5
GND 6
FB1 7
GND
26 CS3
25 DRN3
24 DRP3
COMP1 8
PGND1 9
23 VFB6
41
22 CFB6
LX1 10
21 COMP6
11 12 13 14 15 16 17 18 19 20
DS9911-04 August 2007
VQFN-40L 6x6
www.richtek.com
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