Moteur de recherche de fiches techniques de composants électroniques |
|
ILC7081AIM5ADJ Fiches technique(PDF) 8 Page - Fairchild Semiconductor |
|
ILC7081AIM5ADJ Fiches technique(HTML) 8 Page - Fairchild Semiconductor |
8 / 16 page ILC7080/81 8 REV. 1.0.7 4/3/03 The layout of the LDO and its external components are also based on some simple rules to minimize EMI and output voltage ripple. Figure 8. Recommended application circuit schematic Figure 9. Recommended application circuit layout (not drawn to scale). Note: ground plane is bottom layer of PCB and connects to top layer ground connections through vias. C NOISE 0.01 µF C OUT 4.7 µF ESR<0.5 Ω C IN 1 µF ON/OFF V OUT V IN V BATT ILC7080 5 23 1 4 SOT23-5 Ground Plane Ground Plane Ground Plane Ground Plane DC/DC Converter L O A D + GND Evaluation Board Parts List For Printed Circuit Board Shown Above Grounding Recommendations 1. Connect CIN between VIN of the ILC7080/81 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 ILC7080/81 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; ILC7080/81, input capacitor CIN, noise bypass capacitor CNOISE and output capac- itor COUT as close together as possible. 2. Keep the output capacitor COUT as close to the ILC7080/81 as possible with very short traces to the VOUT and GND pins. 3. The traces for the related components; ILC7080/81, input capacitor CIN, noise bypass capacitor CNOISE and output capac- itor 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. Label Part Number Manufacturer Description U1 ILC7081AIM5-30 Fairchild Semi. 100mA RF LDOTM regulator J1 69190-405 Berg Connector, four position header CIN GRM40 Y5V 105Z16 muRata Ceramic capacitor, 1 µF,16V, SMT (size 0805) CNOISE ECU-V1H103KBV Panasonic Ceramic capacitor, 0.01 µF,16V, SMT (size 0603) COUT GRM42-6X5R475K10 muRata Ceramic capacitor, 4.7 µF,16V, SMT (size 1206) |
Numéro de pièce similaire - ILC7081AIM5ADJ |
|
Description similaire - ILC7081AIM5ADJ |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants 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 |