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LTC3873ETS8 Datasheet(PDF) 5 Page - Linear Technology |
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LTC3873ETS8 Datasheet(HTML) 5 Page - Linear Technology |
5 / 16 page LTC3873 5 3873fa Frequency vs Temperature Maximum Sense Threshold vs Temperature TYPICAL PERFORMANCE CHARACTERISTICS IPRG (Pin 1/Pin 4): Current Sense Limit Select Pin. ITH (Pin 2/Pin 3): This pin serves as the error amplifier compensation point. Nominal voltage range for this pin is 0.7V to 1.9V. VFB (Pin 3/Pin 2): This pin receives the feedback voltage from an external resistor divider across the output. GND (Pin 4/Pin 1): Ground Pin. NGATE (Pin 5/Pin 8): Gate Drive for the External N-Channel MOSFET. This pin swings from 0V to VIN. VCC (Pin 6/Pin 7): Supply Pin. This pin must be closely decoupled to GND (Pin 4). PIN FUNCTIONS (TS8/DDB) RUN/SS (Pin 7/Pin 6): Shutdown and External Soft-Start Pin. In shutdown, all functions are disabled and the NGATE pin is held low. SW (Pin 8/Pin 5): Switch node connection to inductor and current sense input pin through external slope compensa- tion resistor. Normally, the external N-channel MOSFET’s drain is connected to this pin. Exposed Pad (NA/Pin 9): Ground. Must be soldered to PCB for electrical contact and rated thermal performance. TEMPERATURE (°C) –60 210 230 250 100 3873 G09 190 170 150 –40 –20 0 20 40 60 80 120 TEMPERATURE (°C) 0 100 200 300 50 150 250 –20 20 60 100 3873 G10 120 –40 –60 0 40 80 IPRG = VIN IPRG = FLOAT IPRG = GND |
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