Datasheet LTC3406B-1.2 (Analog Devices) - 5

LTC3406B-1.2
W U TYPICAL PERFOR A CE CHARACTERISTICS (From Figure 1a Except for the Resistive Divider Resistor Values) Start-Up from Shutdown Load Step Load Step
V V OUT OUT RUN 100mV/DIV 100mV/DIV 2V/DIV AC COUPLED AC COUPLED VOUT 1V/DIV IL IL 500mA/DIV 500mA/DIV IL 500mA/DIV ILOAD ILOAD 500mA/DIV 500mA/DIV 3406B12 G15 50 3406B12 G14 µs/DIV 25µs/DIV 25 3406B12 G16 µs/DIV V V IN = 3.6V IN = 3.6V VIN = 3.6V I I LOAD = 600mA LOAD = 0mA TO 600mA ILOAD = 50mA TO 600mA
Load Step Load Step
VOUT VOUT 100mV/DIV 100mV/DIV AC COUPLED AC COUPLED IL IL 500mA/DIV 500mA/DIV I I LOAD LOAD 500mA/DIV 500mA/DIV 25 3406B12 G17 3406B12 G18 µs/DIV 25µs/DIV VIN = 3.6V VIN = 3.6V ILOAD = 100mA TO 600mA ILOAD = 200mA TO 600mA
U U U PI FU CTIO S RUN (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.
OUT (Pin 5):
Output Voltage Feedback Pin. An internal resistive divider divides the output voltage down for com-
GND (Pin 2):
Ground Pin. parison to the internal reference voltage.
SW (Pin 3):
Switch Node Connection to Inductor. This pin connects to the drains of the internal main and synchro- nous power MOSFET switches. sn3406b12 3406b12fs 5