LTC3406ES5-1.8#TRMPBF Linear Technology, LTC3406ES5-1.8#TRMPBF Datasheet - Page 5

• Manufacturer Part Number: LTC3406ES5-1.8#TRMPBF
• Description: IC REG SYNC STEPDN 1.8V TSOT23-5
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3406ES5-1.8#TRMPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.8V
• Current - Output: 600mA
• Frequency - Switching: 1.5MHz
• Voltage - Input: 2.5 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: LTC3406ES5-1.8#TRMPBFTR

(From Figure 1a Except for the Resistive Divider Resistor Values)
500mA/DIV
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
2V/DIV
2V/DIV
U
I
V
LOAD
RUN
OUT
Start-Up from Shutdown
V
V
I
LOAD
IN
OUT
U
= 3.6V
= 1.8V
AC COUPLED
= 600mA
100mV/DIV
500mA/DIV
500mA/DIV
I
V
LOAD
OUT
I
L
40µs/DIV
U
Load Step
V
V
I
LOAD
IN
OUT
= 3.6V
= 1.8V
= 100mA TO 600mA
W
20µs/DIV
U
3406 G16
AC COUPLED
100mV/DIV
500mA/DIV
500mA/DIV
I
V
LOAD
OUT
I
L
3406 G19
V
V
I
Load Step
LOAD
IN
OUT
= 3.6V
= 1.8V
= 0mA TO 600mA
20µs/DIV
V
to GND, Pin 2, with a 2.2µF or greater ceramic capacitor.
V
back voltage from an external resistive divider across the
output.
V
age Feedback Pin. An internal resistive divider divides the
output voltage down for comparison to the internal refer-
ence voltage.
IN
FB
OUT
AC COUPLED
(Pin 4): Main Supply Pin. Must be closely decoupled
(Pin 5) (LTC3406): Feedback Pin. Receives the feed-
100mV/DIV
500mA/DIV
500mA/DIV
(Pin 5) (LTC3406-1.5/LTC3406-1.8): Output Volt-
I
V
LOAD
OUT
I
L
Load Step
LTC3406-1.5/LTC3406-1.8
V
V
I
3406 G17
LOAD
IN
OUT
= 3.6V
= 1.8V
= 200mA TO 600mA
AC COUPLED
100mV/DIV
500mA/DIV
500mA/DIV
I
V
LOAD
OUT
20µs/DIV
I
L
Load Step
V
V
I
LOAD
IN
OUT
= 3.6V
= 1.8V
= 50mA TO 600mA
3406 G20
20µs/DIV
LTC3406
3406fa
5
3406 G18