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LTC3543 Datasheet(PDF) 7 Page - Linear Technology |
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LTC3543 Datasheet(HTML) 7 Page - Linear Technology |
7 / 20 page LTC3543 7 3543fa SW (Pin 1): Switch Node Connector to Inductor. This pin connects to the drains of the internal main and synchronous power MOSFET switches. CAP (Pin 2): Capacitor used for smoothing out spread spectrum or for PLL response. Connect to a capacitor whose other plate is connected to GND, or allow the pin to float. Value = 1nF – 10nF. MODE (Pin 3): Mode Selection Pin. Connect as follows to invoke desired operation: MODE = GND → Burst Mode operation, MODE = VFB → Pulse skip with spread spec- trum, MODE = VIN → Pulse skip, MODE = External clock → PLL mode. VFB (Pin 4): Feedback sensing pin for the external feedback resistors. RUN (Pin 5): Run Control Input. Forcing pin above 1.5V enables the part. Forcing the pin below 0.3V shuts down the device. In shutdown, all functions are disabled, drawing <1μA of supply current. Do not leave the RUN pin floating. VIN (Pin 6): Main Supply Pin. Exposed Pad (Pin 7): Exposed Pad connected to ground. LOGIC SW VIN VFB MODE RUN S R Q QB MODE SELECT R1 R2 COUT CIN BURST C1 RS BP MAIN ICOMP IRCMP OSC PEAK CURRENT LEVEL REF SYNCHRONOUS VIN VOUT CAP 0.6V VOUT EA L L L 5 3 2 4 1 7 6 3543 FD GND SPREAD SPECTRUM PLL FUNCTIONAL DIAGRAM PIN FUNCTIONS |
Similar Part No. - LTC3543_15 |
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Similar Description - LTC3543_15 |
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