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RC5052
9
P
Table 2. RC5052 Application Bill of Materials for Intel Pentium II Processors
(Components based on Worst Case Analysis—See Appendix for Details)
*See Table 3.
Notes:
1. Inductor L1 is recommended to isolate the 5V input supply from noise generated by the MOSFET switching, and to comply
with Intel dI/dt requirements. L1 may be omitted if desired.
2. For designs using the TO-220 MOSFETs, heatsinks with thermal resistance
Θ
SA
< 20°C/W should be used. For designs using
the TO-263 MOSFETs, adequate copper area should be used. For details and a spreadsheet on MOSFET selections, refer
to Applications Bulletin AB-8.
Reference
C1
Manufacturer Part #
AVX
TAJB475M010R5
Panasonic
ECU-V1C105ZFX
Panasonic
ECU-V1H104ZFX
Sanyo
10MV1200GX
Sanyo
6MV1500GX
Motorola
MBRD835L
Any
Quantity
1
Description
4.7μF, 10V Capacitor
Requirements/Comments
C2, C5
2
1μF, 16V Capacitor
C3-4,6
3
100nF, 50V Capacitor
C
IN
*
1200μF, 10V Electrolytic
I
RMS
= 2A
C
OUT
*
1500μF, 6.3V Electrolytic
ESR
≤
44m
D1
1
8A Schottky Diode
L1
Optional
2.5μH, 10A Inductor
DCR ~ 6m
See Note 1.
DCR ~ 2m
R
DS(ON)
= 20m
@ V
GS
= 4.5V
See Note 2.
L2
Q1
Any
Fairchild
FDP6030L or
FDB6030L
Fairchild
FDP7030BL or
FDB7030BL
Motorola
2N6394
Any
Any
Any
Any
Any
Any
Littelfuse
Fairchild
RC5052M
1
1
1.3μH, 20A Inductor
N-Channel MOSFET
(TO-220 or TO-263)
Q2
1
N-Channel MOSFET
(TO-220 or TO-263)
R
DS(ON)
= 10m
@ V
GS
= 4.5V
See Note 2.
Q3
1
SCR
R1, R6
R2-3
R4
R5
R7
R8
F1
U1
2
2
1
1
10
4.7
10K
*
Optional
Optional
1
1
Sets frequency.
Sets deadtime.
*
DC/DC Controller