LTC3612 is a low quiescent current monolithic synchronous buck regulator . The LTC3612 use a current mode, constant frequency architecture .
The LTC3612 synchronous buck regulator operates from 2.25V to 5.5V input supply voltage range.
The operating frequency is externally programmable up to 4MHz, allowing the use of small surface mount inductors. The maximum output current of the LTC3612 synchronous buck regulator is around 3 Amps .
Other features offered by the LTC3612 manufactured by Linear Technology are : Low Output Ripple Burst Mode® Operation: IQ = 70μA , ±1% Output Voltage Accuracy , Output Voltage Down to 0.6V , High Efficiency: Up to 95% , Low Dropout , Shutdown Current: ≤1μA , Adjustable Switching Frequency: Up to 4MHz , Optional Active Voltage Positioning (AVP) with Internal Compensation , Selectable Pulse-Skipping/Forced Continuous/Burst Mode Operation with Adjustable Burst Clamp , Programmable Soft-Start and other .
Few external components required and high current capability in a small package make it ideal for portable applications .
Using LT3689 adjustable frequency (350kHz to 2.2MHz) monolithic step-down switching regulator with a power-on reset and watchdog timer can be designed a very simple dc power converter . The LT3689 regulator operates from inputs up to 36V and withstands transients up to 60V.
Using a resistor divider on the EN/UVLO pin provides a programmable undervoltage lockout. Current limit, frequency foldback and thermal shutdown provide fault protection.
The LTM4619 designed by Linear Technology is a complete dual 4A step-down switching mode DC DC power supply. LTM4619 include in the package power FETs, switching controller inductor, and all needed components. LTM4619 support a wide input voltage ranges of 4.5V to 26.5Vand supports two outputs with voltage ranges of 0.8V to 5V each output set using a single external resistor.
LTM4619 step-down switching mode DC DC power supply deliver 4A continuous current (5A peak) for each output.
High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability.
LTM4619 supports frequency synchronization and output voltage tracking for supply rail sequencing. LTM4619 can operate in Burst mode or pulse-skipping mode which can be selected for light load operations.
LTM4619 is very simple to design requiring few external components with many build in features like : wide Input Voltage Range: 4.5V to 26.5V , Dual 180° Out-of-Phase Outputs with 4A DC , Typical, 5A Peak Output Current for Each , Dual Outputs with 0.8V to 5V VOUT Range , Output Voltage Tracking , ±1.5% Total DC Output Error , Current Mode Control/Fast Transient Response , Phase-Lockable Fixed Frequency 250kHz to 780kHz , On Board Frequency Synchronization, Parallel Current Sharing , selectable Burst Mode® Operation , Output Overvoltage Protection and more .
