#stepping down type

[liesarg-blog]

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 0.11Ω,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 ± 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: 0.110Ω 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

[nicasro-blog]

Stepping down control device synchronously of 60V electric current mode insulting and specially introducing and starting the stabilizator on one

Insult the special company (Linear Technology) Introduce the large voltage stepping down type of the electric current mode and control the device LT3800, this device has remarkable voltage and load regulating and fast transient response function, do not need auxiliary DC/DC stabilizator and work while starting. An Integrated stabilizator supplies power to IC from inputting the power directly. LT3800 adopts the power of 4V to 60V to work, it is high while reaching 10A in the load current the adjustable output voltage is here from 1.23V to 36V. Through the highest bar source" ON" The voltage drives the nchannel MOSFET synchronously, it is up to 94% that this control device is with high efficiency, and can input 60V to convert to exporting 12V of 36W at the same time. In addition, LT3800 also has burst modes (Burst Mode) Work, can drop the non-loaded quiescent current to low in 100uA, and the vehicle maintenance power generally needs this characteristic. LT3800 is applicable in 2V and 42V car system, 48V telecommunication equipment power, avionic equipment and industrial control system. LT3800 work is in 200kHz fixed frequency. This device utilizes reverse current to forbid the function in order to raise the efficiency at the time of the light load. If the electric current of the inductor is close to zero, this function can forbid the synchro switch to work. Another function of LT3800 is that the adaptation is not an overlap control. Only if the overlap control can keep an invariable Dead Time, thus prevent connecting the switched current, not influenced by type, size or work environment of the outside MOSFET switch. LT3800 adopts 16 pins heat-resisting strengthening TSSOP to capsulate, the specified operating temperature is - from 40oC to 125oC. Regard 1,000 as the unit to buy in batches, the trigger price is 3.10 dollars. Characteristic summary: LT3800 " From 4V to the wide input voltage range of 60V " The output voltage is up to 36V " The adaptation is not that the superposed circuit prevents the switch from connecting " Efficiency when the reverse inductor current characteristic of prohibition of interrupted duty can raise the light load " 100uA non-loaded quiescent current " 200kHz operating frequency

[mcdonlv-blog]

Maxim introduces the high-efficient switch mode stepping down controller MAX8723

Maxim introduces high-efficient, switch mode, stepping down controller MAX8723, the built-in 14V pressure-resistant power switch. This low-cost controller only needs the outside passive component of drib, can produce fixed 3.3V or adjustable of No. one (double-mode) from 6V to 13.2V direct current power supply Direct-flow output voltage. The input voltage range of this device 13.2V makes it become LCD display unit, support some controllers and applied ideal choices of 8V/12V commercial installation.

MAX8723 can be offered and is up to 2A electric current. The device includes the internal power MOSFET, is used in integrating and booting the diode of MOSFET driver, and a outside synchronous rectifier MOSFET used for replacing the Schottky diode, raising the efficiency drives the interface. The device adopts fixed frequency PWM / jumps work pattern of the pulse and electric current mode control framework, needing to compensate can offer the fast load transient response. Its switching frequency can be chosen as 500kHz, 1MHz or 1.5MHz through the pin, thus can reduce the size of the external component to the greatest extent.

MAX8723 built-in soft turn on function, in order to the surge current while exercising restraint in starting. This can prevent the transient response from touching off the protective circuit of the forward end, the prevention system locks.

The device offers other three kinds of important shutoff functions: The electric current restriction, heat shut off, export the trouble and delay time to shut off. These functions can protect the power under the trouble condition. MAX8723 also includes a linear voltage regulator (VL) ,Can offer stationary 5V (25mA) Output it in order to support small external load. Precision great of basic reference output (2V± 1%) of the device ,Can also provide the electric current of drib for external loading.

Offer 16 by MAX8723 pin, the intersection of 4mm x and 4mm TQFN capsulate, work until - 40 C to +85 the intersection of C and technical grade temperature range. The trigger price of the device is $3.65 (more than 1000 films, American F.O.B.) . Assemble well (there is outside component recommended using) in advance MAX8723 assessment edition(EV kit) ,In order to shorten development time.

[mcdonlv-blog]

Insult low VIN person who step down the intersection of DC/DC and converter offers the electric current up to 250mA synchronously specially

Insult special company, introduce high efficiency, 2.25MHz, stepping down steady transformer LTC3549 synchronously, this device can offer the high serial output current up to 250mA with the low input voltage to 1.6V. LTC3549 adopts invariable frequency and electric current mode framework, works with the input voltage of 1.6V to 5.5V, suitable for monomeric alkaline lithium ion or two / nickel-cadmium / the intersection of nickel-hydrogen battery and application very. This device can produce the low output voltage to 0.61V, so can be in order that a new generation is low to press DSP and microcontroller to supply power the most. Its 2.25MHz switching frequency allows to utilize highly low dainty and low-cost ceramic capacitors and inductors in 1mm, therefore can employ making up and taking very compact solution of the board area for the hand type.

LTC3549 adopts RDS (ON) Only 0.4Ω (nchannel) And 0.56Ω (p-channel) Internal for switch,last the efficiencies of 93%. It still adopts undervoltage to be lack of 100% of the duty ratio work patterns, allows the output voltage to equal VIN, thus has further lengthened the operation time of battery. Does LTC3549 utilize the low ripple burst mode (Burst Mode? )Work, offer the non-loaded quiescent current as 50uA alone with the low output ripple in 20mVPK-PK. If it is that a noise is responsive to employ, then LTC3549 can also be set up as the mode jumps in the pulse with lower noise, and still offer the quiescent current as 300uA alone. The electric current is low in 1uA that two kinds of devices both keep shutting down, thus has further lengthened the battery life-span. It is very steady that LTC3549 uses the ceramic capacitor, therefore has realized very low output voltage ripple. Other characteristics include realizing electric current mode working, internal soft turn on and overheat protective of remarkable voltage and load transient response.

Adopt LTC3549EDCB that 6 lead wire 2mm x 3mm DFN capsulates to supply from stock. Regard 1,000 as the unit to buy in batches, each slice of trigger price is 1.35 dollars.

[nicasro-blog]

4MHz stepping down stabilizator synchronously insulting and specially introducing less than 350mm2

Insult the special company (Linear Technology) Put out and adopt the invariable frequency the stepping down steady transformer LTC3418 simultaneously with high efficiency 4MHz of framework of the electric current mode. It adopts 5mm x 7mm QFN to capsulate, can offer the high lasting output current up to 8A when the voltage is low to 0.8V. This device works in the input voltage of 2.25V to 5.5V, very suitable for monomeric lithium battery or nickel-hydrogen metal battery employing and more common ones from 2.5V to the rail system of 5V fixed voltage. Its 4MHz switching frequency allows to utilize highly low low-cost capacitors and inductors in 1.5mm. High frequency can also keep the switching noise lying in the frequency domain of wireless and xDSL of the key while working, make it become xDSL modem, base station of the honeycomb and applied ideal choice of the car. LTC3418 adopts RDS (ON) It is only the internal switch of 0.035, reaches 95% of the efficiency high, adopt undervoltage to be lack of 100% of the duty ratio work at the same time, allow the output voltage to equal VIN. There is this device on slice tracing is input, it is very apt to realize the power is arranged in an order. The non-loaded quiescent current is only 380uA, low in 1uA while closing, it is car power system which needs low spare electric current,etc. that is chosen applied and ideally. To the sensitive application of the noise, SYNC/MODE pin returns configurated into the pulse and jumps or forces to work continuously, interfere with in order to lighten noise and RF. Other characteristics include the power is good (Power Good) Voltage monitor, synchronous ability and overheat protective of external frequency. The application that LTC3418 is the governing factor to application and small solution size and high efficiency which needed 8A output current has offered the optimal solution. Adopt LTC3418 that 38 lead wire 5mm x 7mm QFN capsulates to supply from stock. Regard 1,000 as the unit to buy in batches, each slice of trigger price is 6.75 dollars. Characteristic summary: LTC3418 " High efficiency: Up to 95%" IOUT is up to 8A" VIN range is From 2.25V to 5.5V " VOUT range is 0.8V - VIN" It makes the power very easy to realize to arrange in an order that tracing is input " Programmable invariable frequency work: From 300kHz to 4MHz " 1% of the accuracy grade of output voltage of ± " The work of Low Dropout: 100% of the duty ratios " The good output voltage monitor of the power " Overheat protective " 5mm x 7mm QFN-38 capsulates

[mcdonlv-blog]

Insult low VIN person who step down the intersection of DC/DC and converter offers the electric current up to 250mA synchronously specially

Insult special company, introduce high efficiency, 2.25MHz, stepping down steady transformer LTC3549 synchronously, this device can offer the high serial output current up to 250mA with the low input voltage to 1.6V. LTC3549 adopts invariable frequency and electric current mode framework, works with the input voltage of 1.6V to 5.5V, suitable for monomeric alkaline lithium ion or two / nickel-cadmium / the intersection of nickel-hydrogen battery and application very. This device can produce the low output voltage to 0.61V, so can be in order that a new generation is low to press DSP and microcontroller to supply power the most. Its 2.25MHz switching frequency allows to utilize highly low dainty and low-cost ceramic capacitors and inductors in 1mm, therefore can employ making up and taking very compact solution of the board area for the hand type.

LTC3549 adopts RDS (ON) Only 0.4Ω (nchannel) And 0.56Ω (p-channel) Internal for switch,last the efficiencies of 93%. It still adopts undervoltage to be lack of 100% of the duty ratio work patterns, allows the output voltage to equal VIN, thus has further lengthened the operation time of battery. Does LTC3549 utilize the low ripple burst mode (Burst Mode? )Work, offer the non-loaded quiescent current as 50uA alone with the low output ripple in 20mVPK-PK. If it is that a noise is responsive to employ, then LTC3549 can also be set up as the mode jumps in the pulse with lower noise, and still offer the quiescent current as 300uA alone. The electric current is low in 1uA that two kinds of devices both keep shutting down, thus has further lengthened the battery life-span. It is very steady that LTC3549 uses the ceramic capacitor, therefore has realized very low output voltage ripple. Other characteristics include realizing electric current mode working, internal soft turn on and overheat protective of remarkable voltage and load transient response.

Adopt LTC3549EDCB that 6 lead wire 2mm x 3mm DFN capsulates to supply from stock. Regard 1,000 as the unit to buy in batches, each slice of trigger price is 1.35 dollars.

[vovsis-blog]

Stepping down DC/DC converter of Linear double channel

Ling Li, the special company introduces the double-channel electric current mode PWM stepping down DC/DC changing device LT3506 and LT3506A, these devices have two 2A mains switches, adopts 16 lead wire 5mm x 4mm DFN to capsulate, each passway can offer the high output current up to 1.6A. Make these devices very suitable for regulating many kinds of power from 3.6V to the wide input voltage range of 25V, such as 4 batteries, 5V and 12V power rail, not voltage transformer, lead-acid battery and distributed power on the wall of voltage regulation. The switching frequency of LT3506 is 575kHz, and the switching frequency of LT3506A is 1.1MHz, thus can use dainty, low-cost inductor and ceramic capacitor, produce the low and predictable output ripple at the same time. Low VCESAT (210mV/1A) of LT3506 and LT3506A It reaches 88% of the efficiency high for the internal switch to offer, have reduced heat to limit and lengthen the operation time of battery to the maximum extent. Because there is internal 0.80V group, can maintain the low output voltage easily. Each passway have independent closed-down and the intersection of soft turn on and pin and independent the intersection of power and good indicator signal, in order to help the power arrange in an order. Each other's phase difference of phase place of two passways 180

[nicasro-blog]

Insult and specially introduce one in 40V micropower stepping down DC/DC converter

Insult the special company (Linear Technology) Introduce a integrated boost and 40V micropower stepping down dc/dc changing device LT3470 of the catching diode in ThinSOTTM capsulates newly. Its voltage range of input is from 4V to 40V, can offer the high output current up to 200mA, very applicable in 2 lithium cells, AC adapters or car power application. Burst mode (Burst Mode) It can make the quiescent current drop to alone 26uA to run, make it wait for applied ideal selecting as car system that needs to keep starting the state all the time. The physical dimension of the whole LT3470 solution is only 50mm2, can be used in the limited application of space. LT3470 adopts a miniature inductor and ceramic capacitor, utilize one sluggish control mode and burst mode run in order to offer low to export the ripple ' Less than 10mVP-P) And low quiescent current. Integrated boost and catching diode have reduced external assembly quantity and size of the solution. Finally, the fast electric current be able to prevent LT3470 and external component from being outputted short circuited influence to control to restrain from and sluggish, even the same under the situation of 40V. LT3470 that ThinSOT capsulates supplies from stock. Regard 1,000 as the unit to buy in batches, each slice of trigger price is 2.30 dollars. Characteristic summary: LT3470 " Input span: From 4V to 40V " Low quiescent current: It is 26uA when being here from 12VIN to 3.3VOUT " Integrated boost and catching diode " It is low to export the ripple: " Shut off it under the mode " The output current is 200mA " Sluggish mode control -The low ripple burst mode under the light load runs -Continuous running in the heavy-load " The solution is only 50mm2 " Tabular ( 1mm) ThinSOT capsulates