Electronic Components Datasheet Search |
|
FAN5240QSC Datasheet(PDF) 7 Page - Fairchild Semiconductor |
|
FAN5240QSC Datasheet(HTML) 7 Page - Fairchild Semiconductor |
7 / 19 page PRODUCT SPECIFICATION FAN5240 REV. 1.1.7 8/29/02 7 Circuit Description Overview The FAN5240 is a 2-phase, single output power management IC, which supplies the low-voltage, high-current power to modern processors for notebook PCs. Using very few exter- nal components, the IC controls a precision programmable synchronous buck converter driving external N-Channel power MOSFETs. The output voltage is adjustable from 0.925V to 2.0V by changing the DAC (VID) code settings (see Table 2). The output voltage of the core converter can be changed on-the-fly with programmable slew rate, which meets a key requirement of AMD's Mobile Athlon/Duron processors. The converter can operate in two modes: fixed frequency PWM, and variable frequency hysteretic depending on the load. At loads lower than the point where filter inductor cur- rent becomes discontinuous, hysteretic mode of operation is activated. Switchover from PWM to hysteretic operation at light loads improves the converter's efficiency and prolongs battery run time. As the filter inductor resumes continuous current, the PWM mode of operation is restored. Output Voltage Programming The output voltage of the converter is programmed by an internal DAC in discrete steps of 25mV from 0.925V to 1.300V and then in 50mV steps from 1.300V to 2.00V: Table 2. Output voltage VID 1 - Logic High or open, 0 = Logic Low VID0–4 pins will assume a logic 1 level if left open as each input is pulled up with a 1 µA internal current source. VID4 VID3 VID2 VID1 VID0 VOUT to CPU 11111 0.000 11110 0.925 11101 0.950 11100 0.975 11011 1.000 11010 1.025 11001 1.050 11000 1.075 10111 1.100 10110 1.125 10101 1.150 10100 1.175 10011 1.200 10010 1.225 10001 1.250 10000 1.275 01111 0.000 01110 1.300 01101 1.350 01100 1.400 01011 1.450 01010 1.500 01001 1.550 01000 1.600 00111 1.650 00110 1.700 00101 1.750 00100 1.800 00011 1.850 00010 1.900 00001 1.950 00000 2.000 |
Similar Part No. - FAN5240QSC |
|
Similar Description - FAN5240QSC |
|
|
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 |