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LTC3411A Datasheet(PDF) 7 Page - Linear Technology |
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LTC3411A Datasheet(HTML) 7 Page - Linear Technology |
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7 / 22 page  LTC3565 7 3565fb RT (Pin 1): Timing Resistor Pin. The oscillator frequency is programmed by connecting a resistor from this pin to ground. RUN (Pin 2): Converter Enable Pin. Forcing this pin above 1.5V enables this part, while forcing it below 0.3V causes the device to shut down. In shutdown, the device draws <1μA supply current. This pin must be driven; do not float. SYNC/MODE (Pin 3): Combination Mode Selection and Oscillator Synchronization Pin. This pin controls the operation of the device. When tied to SVIN or GND, Burst Mode operation or pulse skipping mode is selected, respectively. If this pin is held at half of SVIN, the forced continuous mode is selected. The oscillation frequency can be synchronized to an external oscillator applied to this pin. When synchronized to an external clock, pulse skip mode is selected. SW (Pin 4): The Switch Node Connection to the Inductor. This pin swings from PVIN to GND. PIN FUNCTIONS GND (Pin 5, Exposed Pad Pin 11): Main Power Ground Pin. Connect to the (–) terminal of COUT, and (–) terminal of CIN. The exposed pad must be soldered to electrical ground on the PCB. PVIN (Pin 6): Main Supply Pin. Must be closely decoupled to GND. SVIN (Pin 7): The Signal Power Pin. All active circuitry is powered from this pin. Must be closely decoupled to GND. SVIN must be greater than or equal to PVIN. PGOOD (Pin 8): The Power Good Pin. This common drain logic output is pulled to GND when the output voltage is not within ±7% of regulation. VFB (Pin 9): Receives the feedback voltage from the ex- ternal resistive divider across the output. Nominal voltage for this pin is 0.6V. ITH (Pin 10): Error Amplifier Compensation Point. The current comparator threshold increases with this control voltage. Nominal voltage range for this pin is 0.4V to 1.4V. NOMINAL (V) ABSOLUTE MAX (V) PIN NAME DESCRIPTION MIN TYP MAX MIN MAX 1 RT Timing Resistor –0.3 0.4 SVIN –0.3 SVIN + 0.3 2 RUN Enable Pin –0.3 SVIN –0.3 SVIN 3 SYNC/MODE Mode Select/Synchronization Pin 0 SVIN –0.3 SVIN + 0.3 4 SW Switch Node 0 PVIN –0.3 PVIN + 0.3 5 GND Main Power Ground 0 6PVIN Main Power Supply –0.3 5.5 –0.3 6 7SVIN Signal Power Supply 2.5 5.5 –0.3 6 8 PGOOD Power Good Pin 0 SVIN –0.3 SVIN + 0.3 9VFB Output Feedback Pin 0 0.8 1.0 –0.3 SVIN + 0.3 10 ITH Error Amplifier Compensation 0 1.5 –0.3 SVIN + 0.3 |
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