TC2185-3.3VCTTR Microchip Technology, TC2185-3.3VCTTR Datasheet - Page 11
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TC2185-3.3VCTTR
Manufacturer Part Number
TC2185-3.3VCTTR
Description
IC,VOLT REGULATOR,FIXED,+3.3V,CMOS,TSOP,5PIN,PLASTIC
Manufacturer
Microchip Technology
Specifications of TC2185-3.3VCTTR
Rohs Compliant
YES
Regulator Topology
Positive Fixed
Voltage - Output
3.3V
Voltage - Input
Up to 6V
Voltage - Dropout (typical)
0.14V @ 150mA
Number Of Regulators
1
Current - Output
150mA (Min)
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Number Of Outputs
1
Polarity
Positive
Input Voltage Max
6 V
Output Voltage
3.3 V
Output Type
Fixed
Dropout Voltage (max)
140 / 210 mV
Output Current
150 mA
Line Regulation
0.05 %
Load Regulation
0.43 %
Voltage Regulation Accuracy
0.4 %
Maximum Power Dissipation
0.318 W
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
TC2185-3.3VCTR
TC2185-3.3VCTTR
TC21853.3VCTTR
TC2185-3.3VCTTR
TC21853.3VCTTR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TC2185-3.3VCTTR
Manufacturer:
MICROCHIP
Quantity:
45 000
Part Number:
TC2185-3.3VCTTR
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
5.0
5.1
The amount of power the regulator dissipates is prima-
rily a function of input voltage, output voltage and
output current.
The following equation is used to calculate worst-case
power dissipation.
EQUATION 5-1:
The maximum allowable power dissipation (P
a function of the maximum ambient temperature
(T
(T
tion-to-air (
of approximately 220°C/Watt when mounted on a
typical two-layer FR4 dielectric copper-clad PC board.
EQUATION 5-2:
2004 Microchip Technology Inc.
Where:
P
V
V
I
AMAX
JMAX
LMAX
D
INMAX
OUTMIN
Where all terms are previously defined.
) (+125°C) and the thermal resistance from junc-
), the maximum allowable die temperature
THERMAL CONSIDERATIONS
Power Dissipation
P D
JA
= Worst-case actual power dissipation
= Maximum voltage on V
= Minimum regulator output voltage
= Maximum output (load) current
). The 5-Pin SOT-23A package has a
P
DMAX
V
INMAX
=
T
-------------------------------------- -
–
JMAX
V
OUTMIN
–
JA
T
AMAX
I
LMAX
IN
DMAX
) is
JA
The P
P
operation is within limits. For example:
Actual power dissipation:
Maximum allowable power dissipation:
In this example, the TC2014 dissipates a maximum of
only 26.7 mW; far below the allowable limit of 318 mW.
In a similar manner, the P
be used to calculate maximum current and/or input
voltage limits.
5.2
The primary path of heat conduction out of the package
is via the package leads. Therefore, layouts having a
ground plane, wide traces at the pads and wide power
supply bus lines combine to lower
increase the maximum allowable power dissipation
limit.
Given:
Find:
DMAX
V
V
I
T
T
1. Actual power dissipation
2. Maximum allowable dissipation
LOADMAX
D
P
AMAX
JMAX
INMAX
OUTMIN
TC2014/2015/2185
D
equation to ensure that regulator thermal
equation can be used in conjunction with the
Layout Considerations
=
=
=
--------------------------------------------------------------------------------------------
26.7mW
V
P
3.0 1.1
INMAX
DMAX
= 3.0V +10%
= 2.7V – 2.5%
= 40 mA
= +125°C
= +55°C
–
=
=
=
V
–
OUTMIN
T
-------------------------------------- -
125 55
-------------------- -
318mW
JMAX
D
2.7 0.975
220
and P
220
–
–
JA
I
T
LMAX
DMAX
AMAX
DS21662D-page 11
JA
40 10
and, therefore,
equations can
3 –