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LTC3412 Datasheet(PDF) 6 Page - Linear Technology |
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LTC3412 Datasheet(HTML) 6 Page - Linear Technology |
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6 / 20 page  LTC3412 6 3412fb PI FU CTIO S SVIN (Pin 1/Pin 11): Signal Input Supply. Decouple this pin to SGND with a capacitor. Normally SVIN is equal to PVIN. SVIN can be greater than PVIN but keep the voltage difference between SVIN and PVIN less than 0.5V. PGOOD (Pin 2/Pin 12): Power Good Output. Open-drain logic output that is pulled to ground when the output voltage is not within ±7.5% of regulation point. ITH (Pin 3/Pin 13): Error Amplifier Compensation Point. The current comparator threshold increases with this control voltage. Nominal voltage range for this pin is from 0.2V to 1.4V with 0.2V corresponding to the zero-sense voltage (zero current). VFB (Pin 4/Pin 14): Feedback Pin. Receives the feedback voltage from a resistive divider connected across the output. RT (Pin 5/Pin 15): Oscillator Resistor Input. Connecting a resistor to ground from this pin sets the switching fre- quency. SYNC/MODE (Pin 6/Pin 16): Mode Select and External Clock Synchronization Input. To select forced continuous, tie to SVIN. Connecting this pin to a voltage between 0V and 1V selects Burst Mode operation with the burst clamp set to the pin voltage. RUN/SS (Pin 7/Pin 1): Run Control and Soft-Start Input. Forcing this pin below 0.5V shuts down the LTC3412. In shutdown all functions are disabled drawing < 1μA of supply current. A capacitor to ground from this pin sets the ramp time to full output current. SGND (Pin 8/Pin 2): Signal Ground. All small-signal components, compensation components and the exposed pad on the bottom side of the IC should connect to this ground, which in turn connects to PGND at one point. PVIN(Pins9,16/Pins3,10):PowerInputSupply.Decouple this pin to PGND with a capacitor. SW (Pins 10, 11, 14, 15/Pins 4, 5, 8, 9): Switch Node Connection to the Inductor. This pin connects to the drains of the internal main and synchronous power MOSFET switches. PGND (Pins 12, 13/Pins 6, 7): Power Ground. Connect this pin close to the (–) terminal of CIN and COUT. Exposed Pad (Pin 17/Pin 17): Signal Ground. Must be soldered to PCB for electrical connection and thermal performance. (FE/UH Package) |
Similar Part No. - LTC3412 |
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Similar Description - LTC3412 |
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