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| LTC3406AB Datasheet, PDF (5/16 Pages) Linear Technology – 1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT | |||
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LTC3406AB
TYPICAL PERFORMANCE CHARACTERISTICS
(From Front Page Figure Except for the Resistive Divider Resistor Values)
Start-Up from Shutdown
RUN
2V/DIV
VOUT
1V/DIV
ILOAD
500mA/DIV
VIN = 3.6V
400μs/DIV
VOUT = 1.8V
ILOAD = 600mA (3Ω RES)
Load Step
VOUT
200mV/DIV
IL
500mA/DIV
ILOAD
500mA/DIV
3406B G31
VIN = 3.6V
20μs/DIV
VOUT = 1.8V
ILOAD = 0mA TO 600mA
Load Step
VOUT
200mV/DIV
IL
500mA/DIV
ILOAD
500mA/DIV
3406B G32
VIN = 3.6V
20μs/DIV
VOUT = 1.8V
ILOAD = 50mA TO 600mA
3406B G33
Load Step
VOUT
200mV/DIV
IL
500mA/DIV
ILOAD
500mA/DIV
VIN = 3.6V
20μs/DIV
VOUT = 1.8V
ILOAD = 100mA TO 600mA
Load Step
VOUT
200mV/DIV
IL
500mA/DIV
ILOAD
500mA/DIV
3406B G34
VIN = 3.6V
20μs/DIV
VOUT = 1.8V
ILOAD = 200mA TO 600mA
Discontinuous Operation
SW
(2V/DIV)
VOUT
20mV/DIV
AC COUPLED
IL
200mA/DIV
3406B G35
VIN = 3.6V
VOUT = 1.8V
ILOAD = 25mA
500ns/DIV
3406B G36
PIN FUNCTIONS
RUN (Pin 1): Run Control Input. Forcing this pin above 1.5V
enables the part. Forcing this pin below 0.3V shuts down
the device. In shutdown, all functions are disabled drawing
<1μA supply current. Do not leave RUN ï¬oating.
GND (Pin 2): Ground Pin.
SW (Pin 3): Switch Node Connection to Inductor. This pin
connects to the drains of the internal main and synchronous
power MOSFET switches.
VIN (Pin 4): Main Supply Pin. Must be closely decoupled to
GND, Pin 2, with a 2.2μF or greater ceramic capacitor.
VFB (Pin 5): Feedback Pin. Receives the feedback voltage
from an external resistive divider across the output.
3406abfa
5
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