TC1186-4.0VCT713 Microchip Technology, TC1186-4.0VCT713 Datasheet - Page 10

• Manufacturer Part Number: TC1186-4.0VCT713
• Description: IC CMOS LDO 4.0V 150MA SOT23A-5
• Manufacturer: Microchip Technology

Specifications of TC1186-4.0VCT713

• Regulator Topology: Positive Fixed
• Voltage - Output: 4V
• Voltage - Input: Up to 6V
• Voltage - Dropout (typical): 0.27V @ 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: 4 V
• Output Type: Fixed
• Dropout Voltage (max): 400 mV
• Output Current: 150 mA
• Line Regulation: 0.05 %
• Load Regulation: 0.5 %
• Voltage Regulation Accuracy: 0.5 %
• 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: Details
• Other names: TC11864.0VCT713

TC1054/TC1055/TC1186
5.0
5.1
Integrated thermal protection circuitry shuts the
regulator off when die temperature exceeds 160°C.
The regulator remains off until the die temperature
drops to approximately 150°C.
5.2
The amount of power the regulator dissipates is
primarily a function of input voltage, output voltage and
output current. The following equation is used to
calculate worst case actual power dissipation:
EQUATION 5-1:
The
(Equation
temperature (T
temperature (T
junction-to-air (θ
θ
EQUATION 5-2:
DS21350D-page 10
JA
I
Where:
of approximately 220°C/Watt.
V
LOAD
V
OUT
IN
maximum
Where all terms are previously defined.
THERMAL CONSIDERATIONS
Thermal Shutdown
Power Dissipation
MAX
MAX
P
P
MIN
5-2) is a function of the maximum ambient
D
D
≈
= Worst case actual power dissipation
= Maximum voltage on V
= Minimum regulator output voltage
= Maximum output (load) current
P
(
DMAX
J
V
A
MAX
JA
INMAX
MAX
). The 5-Pin SOT-23 package has a
) and the thermal resistance from
), the maximum allowable die
allowable
=
–
(
------------------------------------------- -
T
V
JMAX
OUTMIN
θ
–
JA
T
power
)I
AMAX
LOADMAX
IN
)
dissipation
Equation 5-1
Equation 5-2
within limits.
For example:
Actual power dissipation:
Maximum allowable power dissipation:
In this example, the TC1054 dissipates a maximum of
20.7 mW; below the allowable limit of 318 mW. In a
similar manner,
used to calculate maximum current and/or input
voltage limits.
5.3
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 θ
increase the maximum allowable power dissipation
limit.
Given:
V
V
I
T
T
Find:
LOAD
A
IN
OUT
J
MAX
MAX
MAX
MIN
MAX
P
D
Layout Considerations
=
≈
=
(
20.7mW
[
V
= 3.0V +5%
= 2.7V – 2.5%
= 40 mA
= +125°C
= +55°C
1.
2.
(
P
to ensure regulator thermal operation is
INMAX
3.0 1.05
can be used in conjunction with
DMAX
Equation 5-1
×
Actual power dissipation
Maximum allowable dissipation
–
=
=
=
V
)
OUTMIN
(
------------------------------------------- -
318mW
© 2007 Microchip Technology Inc.
(
-------------------------
–
T
125 55
JMAX
(
220
2.7 0.975
–
and
×
θ
)I
–
JA
LOADMAX
)
T
Equation 5-2
AMAX
JA
)
]40 10
and, therefore,
)
×
-3
can be