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RT9259PQV Datasheet(PDF) 2 Page - Richtek Technology Corporation |
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RT9259PQV Datasheet(HTML) 2 Page - Richtek Technology Corporation |
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2 / 15 page  RT9259 2 DS9259-03T00 August 2007 www.richtek.com Typical Application Circuit Functional Pin Description Pin Configurations (TOP VIEW) To be continued SOP-14 FBL DRV COMP RT_DIS GND PHASE FB VCC12 NC NC BOOT PGND UGATE LGATE 2 3 4 11 12 13 14 5 6 7 8 9 10 VQFN-16L 4x4 V IN2 +5V to +12V V OUT1 Q1 Q2 C IN RT9259 V IN1 +3.3V/+5V/+12V BOOT DRV PHASE UGATE LGATE PGND FB GND C OUT L OUT 1 COMP FBL RT_DIS V OUT2 C OUT2 Q3 VCC12 V CC +12V NC NC 6 7 8 9 10 11 4 5 12 13 14 2 3 15 16 UGATE BOOT NC NC VCC12 VCC12 LGATE PGND PHASE GND GND FBL DRV FB COMP RT_DIS SSOP-16 Pin No. RT9259 S RT9259 A RT9259PQV Pin Name Pin Function 1 1 15 BOOT Bootstrap supply for the upper gate driver. Connect the bootstrap capacitor between BOOT pin and the PHASE pin. The bootstrap capacitor provides the charge to turn on the upper MOSFET. 2 2 16 RT_DIS Connect a resistor from RT_DIS to GND to set frequency. In addition, if this pin is pulled down towards GND, it will disable both regulator outputs until released. 3 3 1 COMP Buck converter external compensation. This pin is used to compensate the control loop of the buck converter. 4 4 2 FB Buck converter feedback voltage. This pin is the inverting input of the PWM error amplifier. FB senses the switcher output through an external resistor divider network. 5 5 3 DRV Connect this pin to the gate of an external MOSFET. This pin provides the drive for the linear regulator ’s pass MOSFET. 12 11 10 9 13 14 15 16 1 2 3 4 8 7 6 5 FBL DRV COMP FB PGND LGATE NC NC 17 |
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