 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
SC2447 Datasheet(PDF) 1 Page - Semtech Corporation |
|
|
|||||||||||||||||||||||||||||
SC2447 Datasheet(HTML) 1 Page - Semtech Corporation |
|
|
1 / 26 page  POWER MANAGEMENT 1 www.semtech.com SC2447 Dual-Phase, Single or Dual Output Synchronous Step-Down Controller REFOUT GDH2 IN1- SYNC CS1+ COMP1 SS1/EN1 CS1- SS2/EN2 COMP2 IN2- REFIN CS2- CS2+ GDH1 GDL1 GDL2 REF ROSC AGND AVCC VDDG CBN CBP VSSO VSSC DISABLE VI REG5V VO VDDO VDDC V OUT1 2.5V/20A V IN 12V V OUT2 1.2V/25A L 1 1 µH/1.8mΩ C O1 100 µF x 3 C IN1 22 µF x 4 C SS1 0.1 µF C O2 100 µF x 3 C SS2 0.1 µF R OSC , 51.1KΩ C 5 1 µF C 3 1 µF C VCC 4.7 µF R S1B 22.1K Ω R S1A 22.1K Ω C CS1 100nF R S1C , 11KΩ PIP212-12M R FB1A 10K Ω R FB1B 2.49K Ω R A1 24.9K Ω C A1 3.3nF C REF 0.1uF C CMP1 10pF C B1 100nF R 1 10 Ω R VCC 10 Ω L 2 0.4 µH/1mΩ C 6 1 µF C 4 1 µF R S2B 200K Ω R S2A 22.1K Ω C CS2 68nF R S2C , 20KΩ VDDG CBN CBP VSSO VSSC DISABLE VI REG5V VO VDDO VDDC PIP212-12M R FB2A 10K Ω R FB2B 7.15K Ω R A2 16.9K Ω C A2 3.3nF C CMP2 10pF C B2 100nF R 2 10 Ω C IN2 22 µF x 4 SC2447 Description Revision: December 15, 2006 Features Typical Application Circuit The SC2447 is a versatile high-frequency dual phase PWM step-down controller optimized for Philips and Renesas DrMOSTM. Both phases are capable of sourcing or sink- ing load currents, making the SC2447 suitable for net- working system power and DDR applications. The SC2447 employs fixed frequency, continuous-con- duction peak current-mode control for easy compensa- tion and fast transient response. The SC2447 can be used to generate two independent outputs (up to 30A per output) or a single 60A output with shared phase current. The PWM signals are 180° out of phase to minimize input/output ripple. Either inductor DC resistance or precision sense resistor can be used for current-mode control. Inductor DC resis- tance sensing has the advantage of being lossless. Each phase has individual closed-loop soft-start and over- load shutdown timer. The SC2447 powers up neatly with pre-biased output. It has tri-state shutdown and hiccup overload protection. In two-phase single-output configu- ration, the master timer controls the soft-start and over- load shutdown functions. The SC2447 is in a lead-free, WEEE and RoHS compliant, TSSOP-28 package. 2-Phase Step-down Controller optimized for Philips or Renesas DrMOSTM Out of Phase Operation for Low Input Current Ripple Outputs Source and Sink Current Fixed Frequency Peak Current-Mode Control Lossless Inductor DCR Current Sensing Optional Resistor Current-Sensing for Precise Cur- rent-Limit Dual 30A Outputs or 2-Phase 60A Single Output Operation Wide Input Voltage Range: 4.65V to 15V Individual Closed-Loop Soft-Start, Overload Shut- down Timer and Enable Output Voltage as Low as 0.5V Starts into Pre-Bias Output Tri-State PWM Output during Shutdown Programmable Frequency Up to 1MHz Per Phase External Synchronization TSSOP-28 Lead-free Package. Fully WEEE and RoHS Compliant Applications Telecommunication Power Supplies DDR Memory Power Supplies Graphic Power Supplies Servers and Base Stations Figure 1 |
Similar Part No. - SC2447 |
|
Similar Description - SC2447 |
|
|
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | 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
