
PRODUCT SPECIFICATION
RC5057
13
Table 5. RC5057 Application Bill of Materials for Coppermine/Camino Processors
(Typical Design)
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.
Test Parameters
Figure 4. Output Drive Timing Diagram
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
3
1200μF, 10V Electrolytic I
RMS
= 2A
C
OUT
8
1500μF, 6.3V
Electrolytic
3A Schottky Diode
ESR
≤
44m
D1
1
L1
Optional
2.5μH, 10A Inductor
DCR ~ 6m
See Note 1.
DCR ~ 2m
R
DS(ON)
= 20m
@ VG
S
= 4.5V
See Note 2.
L2
Q1-2
Any
Fairchild
FDP6030L or
FDB6030L
Any
Any
Any
Any
Any
N/A
Fairchild
RC5057M
1
2
1.3μH, 20A Inductor
N-Channel MOSFET
(TO-220 or TO-263)
R1
R2-3
R4
R5
R6
R7
U1
1
2
1
1
1
1
1
33
4.7
10K
6.24K
10
3.0m
DC/DC Controller
PCB Trace Resistor
t
R
t
F
t
DT
t
DT
HIDRV
LODRV
2V
2V
10%
2V
90%
90%
2V
10%