Another high efficiency and easy to use synchronous buck regulator designed by the Linear Technology is the LTC3619B regulator which use a constant frequency current mode architecture.
The input supply voltage range of the LTC3619B regulator is from 2.5V to 5.5V . The LTC3619B is easy to use and is ideal for high peak load current applications and many other applications like : USB powered devices , supercapacitor charging , radio transmitters and other handheld devices applications .
The output voltages supported by the LTC3619B is from 0.6V to 5 volts offering high efficiency ( up to 96%) .
The LTC3619B offers two output channels which can supply can supply 400mA ( on channel 1 ) and 800mA output current ( for channel 2 ) .
The operating frequency is internally set at 2.25MHz allowing the use of small surface mount inductors .
Other features of the LTH3619 regulator are : Programmable Average Input Current Limit , Low Noise Pulse-Skipping Operation at Light Loads , Input Voltage Range: 2.5V to 5.5V , Output Voltage Range: 0.6V to 5V , 2.25MHz Constant-Frequency Operation , Power Good Output Voltage Monitor for Each Channel , Low Dropout Operation: 100% Duty Cycle , Independent Internal Soft-Start for Each Channel , ±2% Output Voltage Accuracy , Short-Circuit Protected .