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FAN2106MPX 데이터시트(PDF) 3 Page - Fairchild Semiconductor |
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FAN2106MPX 데이터시트(HTML) 3 Page - Fairchild Semiconductor |
3 / 14 page © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN2106 Rev. 1.0.1 3 Pin Assignments Figure 3. MLP 5x6mm Pin Configuration (PCB Layout View) Pin Definitions Pin Name Description P1, 6-12 SW Switching Node . P2, 2-5 PVIN Power Input Voltage . Connect to the main input power source. P3, 21-23 PGND Power Ground . Power return and Q2 source. 1 BOOT High-Side Drive BOOT Voltage . Connect through capacitor (CBOOT) to SW. The IC includes an internal synchronous bootstrap diode to recharge the capacitor on this pin to VCC when SW is LOW. 13 PGOOD Power-Good Flag . An open-drain output that pulls LOW when FB is outside a ±10% range of the reference when EN is HIGH. PGOOD does not assert HIGH until the fault latch is enabled. 14 EN ENABLE . Enables operation when pulled to logic HIGH or left open. Toggling EN resets the regulator after a latched fault condition. This input has an internal pull-up when the IC is functioning normally. When a latched fault occurs, EN is discharged by a current sink. 15 VCC Input Bias Supply for IC . The IC’s logic and analog circuitry are powered from this pin. 16 AGND Analog Ground . The signal ground for the IC. All internal control voltages are referred to this pin. Tie this pin to the ground island/plane through the lowest impedance connection. 17 ILIM Current Limit . A resistor (RILIM) from this pin to AGND can be used to program the current- limit trip threshold lower than the default setting. 18 R(T) Oscillator Frequency . A resistor (RT) from this pin to AGND sets the PWM switching frequency. 19 FB Output Voltage Feedback . Connect through a resistor divider to the output voltage. 20 COMP Compensation . Error amplifier output. Connect the external compensation network between this pin and FB. 24 PWM# / VOUT Forced PWM / VOUT . Connect to VOUT to enable light-load, power-saving mode of operation. Connect to GND or leave open for PWM mode. 25 RAMP Ramp Amplitude . A resistor (RRAMP) connected from this pin to PVIN sets the ramp amplitude and provides voltage feedforward functionality. |
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