Linear Technology introduces the LT3980 monolithic buck switching regulator with high efficiency and high input voltage . The LT3980 has an adjustable frequency from 100kHz to 2.4MHz and accepts input voltages up to 58V . The transient voltage of the LT3980 is around 80 volts . The maximum output current which can be delivered by the LT3980 monolithic buck switching regulator is around 2 Amps .
LTC3553 designed by Linear Technology is an USB power manager with integrated Li-Ion Polymer single cell charger and buck regulator . LTC3553 is specially designed for USB applications .
LTC3553 USB power manager automatically limits input current to a maximum of either 100mA or 500mA.
The LTC3553 USB power manager also includes a synchronous buck regulator, a low dropout linear regulator (LDO) and a pushbutton controller.
Main features of the LTC3553 micropower USB manager are : 12μA Standby Mode Quiescent Current (All Outputs On) , Seamless Transition Between Input Power Sources: Li-Ion/Polymer Battery and USB , 240mΩ Internal Ideal Diode Provides Low Loss , High Effi ciency 200mA Buck Regulator , 150mA Low Dropout (LDO) Linear Regulator , Pushbutton On/Off Control With System Reset , Full Featured Li-Ion/Polymer Battery Charger , Programmable Charge Current With Thermal Limiting , Instant-On Operation With Discharged Battery .
This micropower USB manager is very easy to use in any USB application and require few external components.
Using the LT3680 power switching regulator can be designed very simple power supplies with an adjustable frequency from 200kHz to 2.4MHz . The LT3680 power switching regulator accepts input voltages up to 36V. LT3680 use current mode topology for fast transient response and good loop stability.
Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application.
This switching regulator has an output voltage range from 0.79 V to 30 V on offer thermal protection , soft start capability and many other features .The circuit require few external components and offer high efficiency in small package .
As you can see in application circuits the design is very simple requiring few components making it ideal for applications where space is critical.