Datasheet LTC3416 (Analog Devices) - 5

LTC3416
U U U PI FU CTIO S PGND (Pins 1, 10, 11, 20):
Power Ground. Connect this
SW (Pins 8, 9, 12, 13):
Switch Node Connection to pin closely to the (–) terminal of CIN and COUT. Inductor. This pin connects to the drains of the internal main and synchronous power MOSFET switches.
RT (Pin 2):
Oscillator Resistor Input. Connecting a resistor to ground from this pin sets the switching frequency.
SVIN (Pin 16):
Signal Input Supply. Decouple this pin to the SGND capacitor.
TRACK (Pin 3):
Tracking Voltage Input. Applying a voltage that is less than 0.8V to this pin enables tracking. During
PGOOD (Pin 17):
Power Good Output. Open-drain logic tracking, the VFB pin will regulate to the voltage on this pin. output that is pulled to ground when the output voltage is Do not float this pin. not within ±7.5% of the regulation point.
RUN/SS (Pin 4):
Run Control and Soft-Start Input. Forcing
ITH (Pin 18):
Error Amplifier Compensation Point. The this pin below 0.5V shuts down the LTC3416. In shutdown current comparator threshold increases with this control all functions are disabled, drawing <1µA of supply current. voltage. Nominal voltage range for this pin is from 0.2V to A capacitor to ground from this pin sets the ramp time to 1.4V with 0.4V corresponding to the zero-sense voltage full output current. (zero current).
SGND (Pin 5):
Signal Ground. All small-signal compo-
VFB (Pin 19):
Feedback Pin. Receives the feedback voltage nents and compensation components should connect to from a resistive divider connected across the output. this ground, which in turn connects to PGND at one point.
Exposed Pad (Pin 21):
Ground. Connect to SGND.
NC (Pins 6, 15):
No Connect.
PVIN (Pins 7, 14):
Power Input Supply. Decouple this pin to PGND with a capacitor. 3416fa 5