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C3225X5R1C226M Datasheet(PDF) 2 Page - Richtek Technology Corporation |
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C3225X5R1C226M Datasheet(HTML) 2 Page - Richtek Technology Corporation |
2 / 12 page RT8290 2 DS8290-02 March 2011 www.richtek.com Marking Information RT8290GSP : Product Number YMDNN : Date Code Functional Pin Description Pin No. Pin Name Pin Function 1 BOOT Bootstrap for High Side Gate Driver. Connect a 10nF or greater ceramic capacitor from the BOOT pin to SW pin. 2 VIN Voltage Supply Input. The input voltage range is from 4.5V to 23V. A suitable large capacitor must be bypassed with this pin. 3 SW Switching Node. Connect the output LC filter between the SW pin and output load. 4, 9 (Exposed Pad) GND Ground. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. 5 FB Output Voltage Feedback Input. The feedback reference voltage is 0.925V typically. 6 COMP Compensation Node. This pin is used for compensating the regulation control loop. A series RC network is required to be connected from COMP to GND. If needed, an additional capacitor can be connected from COMP to GND. 7 EN Enable Input. A logic high enables the converter, a logic low forces the converter into shutdown mode reducing the supply current to less than 3 μA. For automatic startup, connect this pin to VIN with a 100k Ω pull up resistor. 8 SS Soft-Start Control Input. The soft-start period can be set by connecting a capacitor from SS to GND. A 0.1 μF capacitor sets the soft-start period to 15.5ms typically. VOUT (V) R1 (k Ω) R2 (k Ω) RC (kΩ) CC (nF) L (μH) COUT (μF) 15 153 10 30 3.9 33 22 x 2 10 97.6 10 20 3.9 22 22 x 2 8 76.8 10 15 3.9 22 22 x 2 5 45.3 10 13 3.9 15 22 x 2 3.3 26.1 10 6.8 3.9 10 22 x 2 2.5 16.9 10 6.2 3.9 6.8 22 x 2 1.8 9.53 10 4.3 3.9 4.7 22 x 2 1.2 3 10 3 3.9 3.6 22 x 2 Table 1. Recommended Component Selection RT8290 GSPYMDNN RT8290ZSP : Product Number YMDNN : Date Code RT8290 ZSPYMDNN |
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