SC1453ISK-3.0TR Semtech, SC1453ISK-3.0TR Datasheet - Page 8
![no-image](/images/manufacturer_photos/0/5/595/semtech_sml.jpg)
SC1453ISK-3.0TR
Manufacturer Part Number
SC1453ISK-3.0TR
Description
IC, LDO VOLT REG, 3V, 150mA, 5-SOT-23
Manufacturer
Semtech
Datasheet
1.SC1453ISK1.5TRT.pdf
(15 pages)
Specifications of SC1453ISK-3.0TR
Primary Input Voltage
6.5V
Output Voltage Fixed
3V
Dropout Voltage Vdo
150mV
No. Of Pins
5
Output Current
150mA
Operating Temperature Range
-40°C To +85°C
Peak Reflow Compatible (260 C)
No
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
SC1453ISK-3.0TR
Manufacturer:
Semtech
Quantity:
9 563
Company:
Part Number:
SC1453ISK-3.0TRT
Manufacturer:
Semtech
Quantity:
9 563
Part Number:
SC1453ISK-3.0TRT
Manufacturer:
SEMTECH/美国升特
Quantity:
20 000
Inserting these values into equation (2) gives us:
Using this figure, we can calculate the maximum thermal
impedance allowable to maintain T
With the standard SOT-23-5/TSOT-23-5 Land Pattern
shown at the end of this datasheet, and minimum trace
widths, the thermal impedance junction to ambient for
SC1453ISK is 256°C/W. Thus no additional heatsinking
is required for this example.
The junction temperature can be reduced further (or
higher power dissipation can be allowed) by the use of
larger trace widths and connecting PCB copper to the
GND pin (pin 2), which connects directly to the device
substrate. Adding approximately one square inch of PCB
copper to pin 2 will reduce
130°C/W and T
approximately 100°C for the SOT-23-5 package. The use
of multi layer boards with internal ground/power planes
will lower the junction temperature and improve overall
output voltage accuracy.
P
POWER MANAGEMENT
Applications Information (Cont.)
D
JA
(
2008 Semtech Corp.
MAX
(
MAX
)
)
. 3
T
465
( J
MAX
P
)
D
(
. 2
MAX
T
744
A
J(MAX)
)
(
MAX
)
. 0
for the example above to
150
125
. 0
108
108
NOT RECOMMENDED FOR NEW DESIGN
85
J
JA
mW
to approximately
125°C:
370
C
/
W
8
Layout Considerations
While layout for linear devices is generally not as critical
as for a switching application, careful attention to detail
will ensure reliable operation.
1) Attaching the part to a larger copper footprint will
enable better heat transfer from the device, especially
on PCBs where there are internal ground and power
planes.
2) Place the input, output and bypass capacitors close
to the device for optimal transient response and device
behaviour.
3) Connect all ground connections directly to the ground
plane. If there is no ground plane, connect to a common
local ground point before connecting to board ground.
www.semtech.com
SC1453