Electronic Components Datasheet Search |
|
SC2453 Datasheet(PDF) 1 Page - Semtech Corporation |
|
SC2453 Datasheet(HTML) 1 Page - Semtech Corporation |
1 / 14 page 1 www.semtech.com SC2453 High Performance Quad Output Switching Regulator POWER MANAGEMENT PRELIMINARY Revision 5, August 2002 Description Features Applications Typical Application Circuit Two synchronized converters for low noise Power up sequencing to prevent latch-ups Out of phase operation for low input ripple Over current protection Wide input range, 4.5 to 30V Programmable frequency up to 700KHz Two synchronous bucks for high efficiency at high current One dedicated programmable positive linear regulator and one dedicated programmable nega- tive linear regulator –40 to 105 degree C operating temperature Output voltage as low as 0.5V Small package TSSOP-28 SC2453 is a high performance multi-output converter controller that can be configured for a variety of applica- tions. The SC2453 utilizes synchronous rectified buck topologies where efficiency is most important. It also provides dedicated programmable positive and negative linear regulators using external transistors in conjunction with coupled windings to generate positive and negative voltages. Power up sequencing prevents converter latch- ups. The two buck converters are out of phase, reducing in- put ripple, allowing for fewer input capacitors. All con- verters are synchronized to prevent beat frequencies. High frequency operation will reduce ripple and minimize noise. It also reduces the size of output inductors and capacitors. Other features include soft start, power-good signaling, bootstrapping for high side MOSFETs, and fre- quency synchronization. DSL applications with multiple input voltage re- quirements Mixed-Signal applications requiring positive and negative voltages Cable modem power management Base station power management R38 C29 C41 C30 Q11 Q1 D11 R28 C31 C31 R31 +8-30V R33 SC2453 23 24 25 12 26 8 7 15 3 20 2 4 13 19 18 17 5 28 14 27 21 1 11 10 22 16 6 9 GD1L PH1 GD1H EO2 BST1 POK SYNC/SHDN AGND EO1 GD2L FB1 BD4 FB2 PH2 GD2H BST2 FB4 BDI ILIM2 VIN PGND ILIM1 BD3 FB3 PVCC AVCC SS OSC Q15 Q12 C29 C32 R28 C31 +3.3V Q14 Q11 C32 R28 C30 R32 R31 R31 C32 C33 +3.3V C32 R31 -12V R32 R39 D11 R30 +3.3V C29 C38 L8 R32 C34 R32 C32 R35 D10 +1.5V Q2 +2.5V C29 L9 C35 C42 |
Similar Part No. - SC2453 |
|
Similar Description - SC2453 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |