Linear introduces the efficient 4MHz stepping down stabilizator synchronously
Li Ling special company introduce high efficiency, 4MHz, stepping down steady transformer LTC3568 synchronously, this device adopts 3mm x 3mm DFN to capsulate, offer the high serial output current up to 1.8A. LTC3568 adopts invariable frequency and electric current mode framework, works with the input voltage of 2.5V to 5.5V, very suitable for the lithium ion / polymer battery to import and support some 3.3V or 5V employed to input. This device can produce the low output voltage to 0.8V, can be in order that a new generation is low to press DSP and microcontroller to supply power the most. Its switching frequency is programming from 4MHz range, can use height dainty, low-cost ceramic capacitors and inductors of less than 1mm, can make up and take very compact solution of the board area.
LTC3568 adopts RDS (ON) Only Internal switch (nchannel and p-channel) of 0.11Ξ©,Have realized it reaches 96% of the efficiency high. This device still adopts undervoltage to be lack of 100% of the duty ratio work patterns, allow the output voltage to equal VIN, this has further lengthened the operation time of battery. Does LTC3568 utilize the burst mode (Burst Mode? )Work, offer the non-loaded quiescent current as 60uA alone. If it is that a noise is responsive to employ, then it is replaced that can the mode jumps with more low-noise pulse in the work of burst mode. In these two kinds of modes, this device keeps low on the closed-down electric current of 1uA. In order to reduce the noise, the external clock that the switching frequency of LTC3568 can also move ahead simultaneously to 400kHz to 4MHz furtherly. Other characteristics include the accuracy grade of output voltage, short circuit protection, internal soft turn on and overheat protective of Β± 2%.
Adopt LTC3568EDD that 3mm x 3mm DFN-6 capsulates to supply from stock. Regard 1,000 as the unit to buy in batches, each slice of trigger price is 2.95 dollars.
Characteristic summary: LTC3568 High-frequency to work: Up to 4MHz High efficiency: Up to 96% VIN range: From 2.5V to 5.5V Output voltage from 0.8V to 5V Low quiescent current: 60uA; Shut down in the electric current: IQ is less than or equal to 1uA The mode work of the electric current realizes remarkable voltage and load transient response Short circuit protection The work of Low Dropout: 100% of the duty ratios Low RDS (ON) Internal switch: 0.110Ξ© Available burst mode job It is very steady to use the ceramic capacitor Can move ahead simultaneously to the external clock Dainty 3mm x 3mm, 10 lead wire DFN are capsulated
