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LTC3872-1 Datasheet(PDF) 6 Page - Linear Technology |
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LTC3872-1 Datasheet(HTML) 6 Page - Linear Technology |
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6 / 20 page  LTC3872-1 6 38721f For more information www.linear.com/LTC3872-1 IPRG (Pin 1/Pin 4): Current Sense Limit Select Pin. ITH (Pin 2/Pin 3): Error Amplifier Compensation Point. Nominal voltage range for this pin is 0.7V to 1.9V. VFB (Pin 3/Pin 2): Receives the feedback voltage from an external resistor divider across the output. GND (Pin 4/Pin 1, Exposed Pad Pin 9): Ground. The ex- posed pad must be soldered to PCB ground for electrical contact and rated thermal performance. NGATE(Pin5/Pin8):GateDrivefortheExternalN-Channel MOSFET. This pin swings from 0V to VIN. VIN (Pin 6/Pin 7): Supply Pin. This pin must be closely decoupled to GND. 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. RUN/SS VIN SW GND ITH VFB NGATE 38721 FD IPRG SLOPE COMPENSATION 550kHz OSCILLATOR CURRENT COMPARATOR S R Q VIN VOLTAGE REFERENCE UNDERVOLTAGE LOCKOUT – + ITH BUFFER SWITCHING LOGIC CIRCUIT CURRENT LIMIT CLAMP INTERNAL SOFT-START RAMP – + ILIM RS LATCH 1.2V 1.2V UV SHUTDOWN COMPARATOR SHDN ERROR AMPLIFIER 0.7µA pin FuncTions (TS8/DD8) FuncTional DiagraM |
Similar Part No. - LTC3872-1_15 |
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Similar Description - LTC3872-1_15 |
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