LTC3542-1_15 Datasheet, PDF (6/16 Pages) Linear Technology – 500mA, 2.25MHz 2.8V Output Synchronous Step-Down DC/DC Converter

LTC3542-1
PIN FUNCTIONS
V_OUT (Pin 1): Output Pin. Receives the 2.8V output voltage
to internal feedback resistors.
V_IN (Pin 2): Power Supply Pin. Must be closely decoupled
to GND.
GND (Pin 3): Ground Pin.
SW (Pin 4): Switch Node Connection to Inductor. This pin
connects to the drains of the internal main and synchronous
power MOSFET switches.
MODE/SYNC (Pin 5): Mode Selection and Oscillator
Synchronization Pin. This pin controls the operation of
the device. When tied to GND or V_IN, Burst Mode opera-
tion or pulse skipping mode is selected, respectively. The
oscillation frequency can be synchronized to an external
oscillator applied to this pin and pulse skipping mode is
automatically selected. Do not float this pin.
RUN (Pin 6): Converter Enable Pin. Forcing this pin above
1.5V enables this part, while forcing it below 0.3V causes
the device to shut down. In shutdown, all functions are
disabled drawing <1μA supply current. This pin must be
driven; do not float.
GND (Pin 7): Exposed Pad. The Exposed Pad is ground. It
must be soldered to PCB ground to provide both electrical
contact and optimum thermal performance.
35421f
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