LTC3410 UUUPI FU CTIO SRUN (Pin 1): Run Control Input. Forcing this pin above VIN (Pin 4): Main Supply Pin. Must be closely decoupled 1.5V enables the part. Forcing this pin below 0.3V shuts to GND, Pin 2, with a 2.2µF or greater ceramic capacitor. down the device. In shutdown, all functions are disabled V drawing <1µA supply current. Do not leave RUN floating. FB (Pin 6 Adjustable Version ): Feedback Pin. Receives the feedback voltage from an external resistive divider GND (Pins 2, 5): Ground Pin. across the output. SW (Pin 3): Switch Node Connection to Inductor. This pin VOUT (Pin 6 Fixed Voltage Versions): Output Voltage connects to the drains of the internal main and synchro- Feedback Pin. An internal resistive divider divides the nous power MOSFET switches. output voltage down for comparison to the internal refer- ence voltage. UUWFU CTIO AL DIAGRA SLOPE COMP 0.65V OSC OSC FREQ 4 VIN SHIFT – VFB/VOUT + – EN 6 SLEEP + 0.8V 5Ω R1* 0.4V + – + I – EA COMP BURST R2 S Q 240k R Q SWITCHING V RS LATCH IN LOGIC AND ANTI- SHOOT- RUN BLANKING CIRCUIT THRU 3 SW 1 0.8V REF + SHUTDOWN I 5 RCMP – V 2 GND *R1 = 240k OUT – 1 ( ) 3410 BD 0.8 3410fb 6