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SP7650ER Datasheet(PDF) 4 Page - Sipex Corporation |
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SP7650ER Datasheet(HTML) 4 Page - Sipex Corporation |
4 / 10 page 4 +5V BIAS SUPPLY APPLICATION SCHEMATIC In this application example, the SP7650ER is power by an external +5V bias supply which current consumption of 20mA Maximum. If this supply is not available than it is recommend Sipex SPX5205 Low-Noise LDO Voltage Regulator. RBST 20 CBST 6,800pF R3 200k,1% L1 6.8uH C1 22uF CVCC 2.2uF +5V U1 SP7650 PGND 1 PGND 2 PGND 3 GND 4 VFB 5 COMP 6 UVIN 7 GND 8 SS 9 VIN 10 VIN 11 VIN 12 VIN 13 LX 14 LX 15 LX 16 NC 17 BST 18 GND 19 GND 20 GND 21 VCC 22 LX 23 LX 24 LX 25 LX 26 DBST CSS 47nF CP1 22pF 3.30V 0-3A R2 21.5k,1% GND C3 22uF C3 CERAMIC 1210 X5R 12V 6.3V VIN SD101AWS GND2 VOUT RZ3 7.15k,1% R4 100k,1% C2 0.1uF C1 CERAMIC 1210 X5R 16V CZ3 150pF CZ2 1,000pF R1 68.1k,1% RZ2 15k,1% CF1 100pF fs=300Khz Notes: All resistor & capacitor size 0603 unless other wise specify U1 Bottom-Side Layout should has three Contacts which are isolated from one of another, QT & QB Drain Contact and Controller GND Contact Figure 9. Output Ripple: No Load Figure 10. Output Ripple: 3A Load Table 1: SP7650EB Suggested Components and Vendor Lists Vout ripple = 32mV Vin Ichoke(2A/div) Vout ripple = 40mV Vin Ichoke (2A/div) |
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