LTC3406B-2 Linear Technology, LTC3406B-2 Datasheet - Page 5

• Manufacturer Part Number: LTC3406B-2
• Description: (LTC3406B-1/-2) 600mA Synchronous Step-Down Regulator in ThinSOT
• Manufacturer: Linear Technology

www.DataSheet4U.com
DataSheet U .com
500mA/DIV
(From Figure 1a Except for the Resistive Divider Resistor Values)
PI FU CTIO S
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 floating.
GND (Pin 2): Ground Pin.
SW (Pin 3): Switch Node Connection to Inductor. This pin
connects to the drains of the internal main and synchro-
nous power MOSFET switches.
TYPICAL PERFOR A CE CHARACTERISTICS
4
2V/DIV
1V/DIV
U
V
RUN
OUT
I
L
Start-Up from Shutdown
V
I
LOAD
IN
= 3.6V
U
= 600mA
AC COUPLED
100mV/DIV
500mA/DIV
500mA/DIV
I
V
LOAD
OUT
I
50µs/DIV
L
U
V
I
Load Step
LOAD
IN
= 3.6V
= 100mA TO 600mA
W
3406B12 G14
25µs/DIV
U
AC COUPLED
100mV/DIV
500mA/DIV
500mA/DIV
I
V
LOAD
OUT
I
3406B12 G17
L
Load Step
V
I
LOAD
IN
= 3.6V
= 0mA TO 600mA
25µs/DIV
V
to GND, Pin 2, with a 2.2µF or greater ceramic capacitor.
V
resistive divider divides the output voltage down for com-
parison to the internal reference voltage.
IN
OUT
(Pin 4): Main Supply Pin. Must be closely decoupled
AC COUPLED
100mV/DIV
500mA/DIV
500mA/DIV
(Pin 5): Output Voltage Feedback Pin. An internal
I
V
LOAD
OUT
I
3406B12 G15
L
Load Step
V
I
LOAD
IN
= 3.6V
= 200mA TO 600mA
AC COUPLED
100mV/DIV
500mA/DIV
500mA/DIV
I
V
LOAD
OUT
I
25µs/DIV
L
V
I
Load Step
LOAD
IN
= 3.6V
= 50mA TO 600mA
LTC3406B-1.2
3406B12 G18
25µs/DIV
sn3406b12 3406b12fs
3406B12 G16
5