 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LTC3855IFETRPBF Datasheet(PDF) 1 Page - Linear Technology |
|
||||||||||||||||||||||||||||||
LTC3855IFETRPBF Datasheet(HTML) 1 Page - Linear Technology |
|
|
1 / 44 page  LTC3855 3855f Typical applicaTion DescripTion Dual, Multiphase Synchronous DC/DC Controller with Differential Remote Sense TheLTC®3855isadualPolyPhase®currentmodesynchro- nous step-down switching regulator controller that drives all N-channel power MOSFET stages. It includes a high speed differential remote sense amplifier. The maximum current sense voltage is programmable for either 30mV, 50mV or 75mV, allowing the use of either the inductor DCR or a discrete sense resistor as the sensing element. The LTC3855 features a precision 0.6V reference and can produce output voltages up to 12.5V. A wide 4.5V to 38V input supply range encompasses most intermediate bus voltages and battery chemistries. Power loss and supply noise are minimized by operating the two controller output stages out of phase. Burst Mode® operation, continuous or pulse-skipping modes are supported. The LTC3855 can be configured for up to 12-phase op- eration, has DCR temperature compensation, two power good signals and two current limit set pins. The LTC3855 is available in low profile 40-pin 6mm × 6mm QFN and 38-lead exposed pad FE packages. L , LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and PolyPhase are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066, 6580258. FeaTures applicaTions n Dual, 180° Phased Controllers Reduce Required Input Capacitance and Power Supply Induced Noise n High Efficiency: Up to 95% n RSENSE or DCR Current Sensing n Programmable DCR Temperature Compensation n ±0.75% 0.6V Output Voltage Accuracy n Phase-Lockable Fixed Frequency 250kHz to 770kHz n True Remote Sensing Differential Amplifier n Dual N-Channel MOSFET Synchronous Drive n Wide VIN Range: 4.5V to 38V n VOUT Range: 0.6V to 12.5V without Differential Amplifier n VOUT Range: 0.6V to 3.3V with Differential Amplifier n Clock Input and Output for Up to 12-Phase Operation n Adjustable Soft-Start or VOUT Tracking n Foldback Output Current Limiting n Output Overvoltage Protection n 40-Pin (6mm × 6mm) QFN and 38-Lead FE Packages n Computer Systems n Telecom Systems n Industrial and Medical Instruments n DC Power Distribution Systems High Efficiency Dual 1.8V/1.2V Step-Down Converter 0.1µF 40.2k 0.56µH 470pF 1µF 22µF 330µF ×2 20k 15k VOUT1 1.8V 15A 0.1µF 0.4µH 470pF 330µF ×2 20k 7.5k 100k VOUT2 1.2V 15A TG1 TG2 BOOST1 BOOST2 SW1 SW2 BG1 BG2 DIFFP PGND2 FREQ SENSE1+ SENSE2+ DIFFOUT SENSE1– SENSE2– VFB1 VFB2 ITH1 ITH2 VIN INTVCC TK/SS1 TK/SS2 VIN 4.5V TO 20V 3855 TA01 DIFFN SGND 0.1µF 0.1µF LTC3855 PGND1 4.7µF + + + 20k Load Step (Forced Continuous Mode) VIN = 12V VOUT = 1.8V 50µs/DIV 3855 TA01a IL 5A/DIV VOUT 100mV/DIV AC-COUPLED ILOAD 5A/DIV 300mA TO 5A |
Similar Part No. - LTC3855IFETRPBF |
|
Similar Description - LTC3855IFETRPBF |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
