The LTC3563 uses internal switches with an RDS(ON) of only 0.35 Ohm (N-Channel) and 0.50 Ohm (P-Channel) to deliver efficiencies as high as 96%. It also utilizes low dropout 100% duty cycle operation to allow output voltages equal to VIN, further extending battery run time. The LTC3563 utilizes low ripple (<20mVPK-PK) Burst Mode® operation, drawing only 26uA of no load quiescent current. Shutdown current is less than 1uA further maximizing battery run time. Other features include ±2% output voltage accuracy, internal soft-start and over-temperature protection.
The LTC3563EDC is available in a 2mm x 2mm DFN-6 package and is available from stock. Pricing starts at $1.60 each in 1,000-piece quantities.
Summary of Features of the LTC3563:
* Pin-Selectable Output Voltage: 1.28V/1.87V
* Low Ripple (<20mVp-p) Burst Mode Operation: IQ = 26uA
* 2.5V to 5.5V Input Voltage Range
* High Efficiency: Up to 96%
* 2.25MHz Constant Frequency Operation
* Low Dropout Operation: 100% Duty Cycle
· No Schottky Diode Required
* Internal Soft-Start Limits Inrush Current
* Shutdown Mode Draws <1uA Supply Current
* Current Mode Operation for Excellent Line & Load Transient Response
* Overtemperature Protected
· Available in 2mm x 2mm 6-Lead DFN