7083A1K データシートの表示（PDF） - Fairchild Semiconductor
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7083A1K Datasheet PDF : 16 Pages
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ILC7083/ILC7084
Evaluation Board Parts List (for Figure 9)
Label
Part Number
Manufacturer
Description
U1
ILC7083AIM5-30 Fairchild Semiconductor 150mA RF LDO™ regulator
J1
69190-405
Berg
Connector, four position header
Cin GRM40 Y5V 105Z16
Cnoise ECU-V1H103KBV
Cout GRM42-6X5R475K10
muRata
Panasonic
muRata
Ceramic capacitor, 1µF,16V, SMT (size 0805)
Ceramic capacitor, 0.01µF,16V, SMT (size 0603)
Ceramic capacitor, 4.7µF,16V, SMT (size 1206)
Grounding Recommendations
1. Connect CIN between VIN of the ILC7083 and the
“GROUND PLANE”.
2. Keep the ground side of COUT and CNOISE connected to
the “LOCAL GROUND” and not directly to the
“GROUND PLANE”.
3. On multilayer boards use component side copper for
grounding around the ILC7083 and connect back to a
“GROUND PLANE” using vias.
4. If using a DC-DC converter in your design, use a star
grounding system with separate traces for the power
ground and the control signals. The star should radiate
from where the power supply enters the PCB.
Layout Considerations
1. Place all RF LDO related components; ILC7083, input
capacitor CIN, noise bypass capacitor CNOISE and output
capacitor COUT as close together as possible.
2. Keep the output capacitor COUT as close to the ILC7083
as possible with very short traces to the VOUT and GND
pins.
3. The traces for the related components; ILC7083, input
capacitor CIN, noise bypass capacitor CNOISE and output
capacitor COUT can be run with minimum trace widths
close to the LDO.
4. Maintain a separate “LOCAL GROUND” remote from
the “GROUND PLANE” to ensure a quiet ground near
the LDO.
Figure 9 shows how this circuit can be translated into a PCB
layout.
Recommended Ceramic Output Capacitors
COUT
1µF
2.2µF
4.7µF
Capacitor Size
0805
0805
0805
1206
1206
1206
0805
0805
1206
1206
1206
IOUT
0 to 150mA
0 to 150mA
0 to 150mA
Dielectric
X5R
X7R
X7R
X7R
X7R
X5R
X5R
X5R
X5R
X5R
X7R
Part Number
C2012X5R1A105KT
GRM40X7R105K010
LMK212BJ105KG
GRM42-6X7R105K016
EMK316BJ105KL
TMK316BJ105KL
GRM40X5R225K 6.3
C2012X5R0J225KT
EMK316BJ225ML
GRM42-6X5R475K010
LMK316BJ475ML
Capacitor Vendor
TDK
muRata
Taiyo-Yuden
muRata
Taiyo-Yuden
Taiyo-Yuden
muRata
TDK
Taiyo-Yuden
muRata
Taiyo-Yuden
10
REV. 1.0.9 1/28/03
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