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RT8800A Datasheet(PDF) 2 Page - Richtek Technology Corporation |
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RT8800A Datasheet(HTML) 2 Page - Richtek Technology Corporation |
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2 / 21 page  RT8800A 2 DS8800A-04 August 2007 www.richtek.com All brand name or trademark belong to their owner respectively Functional Pin Description IMAX (Pin 1) Over current protection setting. VID125 (Pin 2) Connect a resistor from this pin to GND can raise VOUT. FB (Pin 3) The pin is defined as the inverting input of internal error amplifier. DVD (Pin 4) The pin is defined as a programmable power UVLO detection input. Trip threshold = 0.8V at VDVD rising. COMP (Pin 5) The pin is defined as the output of the error amplifier and the input of all PWM comparators. PI (Pin 6) The pin is defined as the positive input of the error amplifier. RT (Pin 7) Switching frequency setting. Connect this pin to GND with a resistor to set the frequency. ICOMMON (Pin 8) Common negative input of current sense amplifiers for all three channels. PGOOD (Pin 9) Output power-good indication. The signal is implemented as an output signal with open-drain type. ISP1 , ISP2 , ISP3 (Pin 12, Pin 11, Pin 10) Current sense positive inputs for individual converter channel current sense. PWM1 , PWM2 , PWM3 (Pin 13, Pin 14, Pin 15) PWM outputs for each phase switching drive. VDD (Pin 16) Chip power supply. Connect this pin to a 5V supply. GND [Exposed Pad (17)] The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. Pin Configurations (TOP VIEW) VQFN-16L 3x3 IMAX ISP1 PGOOD ISP3 ISP2 DVD FB VID125 12 11 10 9 13 14 15 16 1 2 3 4 8 7 6 5 GND 17 |
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Similar Description - RT8800A |
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