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ILC6363CIRADJX Folha de dados(PDF) 8 Page - Fairchild Semiconductor |
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ILC6363CIRADJX Folha de dados(HTML) 8 Page - Fairchild Semiconductor |
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8 / 14 page  PRODUCT SPECIFICATION ILC6363 REV. 1.3.5 5/21/02 8 100 µF VIN 15 µH 100 µF R2 ILC6363ADJ LX VIN LBI SEL GND LBO POK/VFB VOUT VOUT 1 2 3 4 8 7 6 5 C2 R3 ON L1 C1 LBO VFB R1 10K OFF PWM PFM SEL GND U1 NOTE: R1 and R2 are user determined values to set VOUT = VFB(1+R1/R2) R1+R2 ≤ 100kΩ 100 µF VIN 15 µH 100 µF ILC6363XX LX VIN LBI SEL GND LBO POK/VFB VOUT VOUT 1 2 3 4 8 7 6 5 C2 R3 ON L1 C1 LBO POK 10K R1 10K OFF PWM PFM SEL GND U1 Layout and Grounding Considerations High frequency switching and large peak currents means PCB design for DC-DC converters requires careful consideration. As a general rule place the DC-DC converter circuitry well away from any sensitive RF or analog compo- nents. The layout of the DC-DC converters and its external components are also based on some simple rules to minimize EMI and output voltage ripple. Layout 1. Place all power components, ILC6363, inductor, input capacitor and output capacitor as close together as possible. 2. Keep the output capacitor as close to the ILC6363 as possible with very short traces to the VOUT and GND pins. Typically it should be within 0.25 inches or 6mm. 3. Keep the traces for the power components wide, typically >50mil or 1.25mm. 4. Place the external networks for LBI and VFB close to the ILC6363, but away from the power components as far as possible. Grounding 1. Use a star grounding system with separate traces for the power ground and the low power signals such as LBI/SD and VFB. The star should radiate from where the power supply enters the PCB. 2. On multilayer boards use component side copper for grounding around the ILC6363 and connect back to a quiet ground plane using vias. Figure 11. Recommended Application Circuit Schematic for ILC6363CIR-ADJ Description Vendor Contact T495 series tantalum Kemet (864) 963-6300 595D series tantalum Sprague (603) 224-1961 TAJ, TPS series tantalum AVX (803) 946-0690 X5R Ceramic X7R Ceramic TDK (847) 390-4373 AVX (803) 946-0690 muRata www.murata.com 100 µF VIN 15 L1 µH COUT 100 µF R1 R2 ILC6363 LX LBI/SD SEL GND LBO VFB VOUT VOUT 1 2 3 4 8 7 6 5 CIN + R3 ON/OFF Local "Quiet" Ground Power Ground PWM PFM VIN |
Nº de peça semelhante - ILC6363CIRADJX |
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Descrição semelhante - ILC6363CIRADJX |
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