RT9911

6 Channel DC/DC Converters

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.

Applications

Digital Still Camera
PDA
Protable Device

Key Spec.
	RT9911
Status	NRND
Recommended Alternative	RT5016C
Vin (min) (V)	2.4
Vin (max) (V)	5.5
Number of Channels	6
Number of Buck Converters	1
Number of Boost Converters	3
Number of Negative Outputs	1
Number of LED Drivers	1
Number of LDO Regulators	0
Application	Portable device
Features	100% Duty Cycle;Enable Input;Internal Compensation;OCP;OVP;UVP
Package Type	VQFN6x6-40

Features

1.6V to 5.5V Battery Input Voltage Range
Synchronous Boost/Buck Selectable DC-DC Converter
► Internal Switches
► Up to 95% Efficiency
Syn-Buck DC-DC Converters
► 0.8V to 5.5V Adjustable Output Voltage
► Up to 95% Efficiency
► 100%_(MAX) Duty Cycle
► Internal Switches
Main Boost DC-DC Converter
► Adjustable Output Voltage
► Up to 97% Efficiency
PWM Converter for CCD Positive Voltage
Inverter for CCD Negative Voltage
White LED Driver for LCD Panel Backlight
Up to 1.4MHz Adjustable Switching Frequency
1μA Supply Current in Shutdown Mode
External Compensation Network for all Converters
Independent Enable Pin to Shutdown Each Channel.
40-Lead VQFN Package
RoHS Compliant and 100% Lead (Pb)-Free

Please confirm with our distributor or sales representative for actual stock status.