mic47100 Micrel Semiconductor, mic47100 Datasheet - Page 11
mic47100
Manufacturer Part Number
mic47100
Description
Mic47100 1a High Speed Low Vin Ldo
Manufacturer
Micrel Semiconductor
Datasheet
1.MIC47100.pdf
(13 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
mic47100-1.2YML
Manufacturer:
MICRET
Quantity:
34
Part Number:
mic47100-1.2YML TR
Manufacturer:
MICREL/麦瑞
Quantity:
20 000
Part Number:
mic47100YMME
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
Micrel, Inc.
To determine the maximum ambient operating
temperature of the package, use the junction-to-
ambient thermal resistance of the device and the
following basic equation:
T
the die θ
The table below shows junction-to-ambient thermal
resistance for the MIC47100 in the MLF
Substituting P
operating
operating conditions for the regulator circuit. The
junction-to-ambient
minimum footprint is 90°C/W.
8-pin 2mm x 2mm
February 2008
J(max)
Package
= 125°C, the maximum junction temperature of
MLF
JA
thermal resistance = 90°C/W.
®
temperature
D
for P
P
Thermal Resistance
D(MAX)
D(max)
thermal
Recommended
=
Minimum
Footprint
90°C/W
and solving for the ambient
will
⎝
⎛
θ
JA
T
J(MAX)
give
resistance
JA
- T
the
®
A
package.
maximum
for
2°C/W
θ
JC
the
11
The maximum power dissipation must not be
exceeded for proper operation.
For example, when operating the MIC47100-1.2YML
at an input voltage of 1.8V and a 1A load with a
minimum footprint layout, the maximum ambient
operating temperature T
follows:
Therefore, a 1.2V application with 1A of output current
can accept an ambient operating temperature of 71°C
in a 2mm x 2mm MLF
of heat sinking and thermal effects on voltage
regulators, refer to the “Regulator Thermals” section
of Micrel’s Designing with Low-Dropout Voltage
Regulators handbook. This information can be found
on Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
T
0
6 .
A
W
=
71
=
°
(
C
125
(
90
°
°
C
C
/
−
W
T
A
)
)
®
package. For a full discussion
A
can be determined as
M9999-022108-A
(408) 944-0800
MIC47100