FAN5066 Datasheet, PDF (10/18 Pages) Fairchild Semiconductor – Ultra Low Voltage Synchronous DC-DC Controller

FAN5066
PRODUCT SPECIFICATION
Table 3. FAN5066 Application Bill of Materials for DDR VTT
Reference
Manufacturer Part #
Quantity Description
C1–2, C6–C9 Panasonic
ECU-V1H104ZFX
6
100nF, 50V Capacitor
C4–5
Panasonic
ECU-V1C105ZFX
2
1µF, 16V Capacitor
C10
Panasonic
1
100pF Capacitor
ECU-V1H101JCG
C11
Sanyo
6SP680M
1
680µF, 6.3V OSCON
COUT
Sanyo
4SP820M
4
820µF, 4V OSCON
D1
Motorola
1N4735A
1
6.2V Zener Diode
L1
Coiltronics
UP1B-1R5
Optional 1.5µH, 4A Inductor
L2
Coiltronics
UP4B-1R5
1
1.5µH, 13A Inductor
Q1–2
Fairchild
FDS6680S
2
N-Channel MOSFET
w/ Integrated Schottky
R1
Any
R2-3
Any
R4
Any
R5-6
Any
1
47Ω
2
4.7Ω
1
10KΩ
2
499Ω
U1
Fairchild
FAN5066M
1
DC/DC Controller
Requirements/Comments
5%, C0G
IRMS = 4.8A
ESR < 12mΩ
DCR ~ 20mΩ
See Note 1.
DCR ~ 4mΩ
RDS(ON) = 17mΩ @
VGS = 4.5V
Notes:
1. Inductor L1 is recommended to isolate the 5V input supply from noise generated by the MOSFET switching. L1 may be
omitted if desired.
Test Circuit
+12V
47Ω
+5V
0.1µF
VCCA
1µF
VCCQP
4.7Ω
HIDRV
3000pF
VCCP
1µF
4.7Ω
LODRV
3000pF
tR
90%
50%
10%
tDT1
50%
tF
90%
50%
10%
tDT2
HIDRV
50%
LODRV
GNDA GNDD GNDP
Figure 3. Output Drive Test Circuit and Timing Diagram
10
REV. 2.1.4 11/13/01