Ling Li specially introduces the newest stepping down stabilizator LTC3568 synchronously
Ling Li belong to special company (LinearTechnologyCorporation) Introduce high efficiency, 4MHz, stepping down stabilizator LTC3568 synchronously, this device adopts 3mm * 3mmDFN 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 applied 3.3V or 5V to input. This device can produce the output voltage low to 0.8V, can supply power for undervoltage DSP and microcontroller of new most generation. Its switching frequency is programming within the range of 850kHz to 4MHz, 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) It is only the internal switch (nchannel and p-channel) of 0.11Ω,Have realized the efficiency up to 96%. This device still adopts 100% of the duty ratio work patterns of Low Dropout, allow the output voltage to equal VIN, this has further lengthened the operation time of battery. LTC3568 utilizes the burst mode (BurstMode) Work, offer it only as the non-loaded quiescent current of 60uA. 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 less than 1uA and shuts down in the electric current. 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 ± 2%. Adopt 3mm * 3mmDFN-6 encapsulated LTC3568EDD 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 not greater than 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: 0.110Ω Available burst mode job It is very steady to use the ceramic capacitor Can move ahead simultaneously to the external clock