TC1264-3.0VAB Microchip Technology, TC1264-3.0VAB Datasheet - Page 7

• Manufacturer Part Number: TC1264-3.0VAB
• Description: LDO Regulator Pos 3V 0.8A 3-Pin (3+Tab) TO-220
• Manufacturer: Microchip Technology
• Type: Linearr

Specifications of TC1264-3.0VAB

• Package: 3TO-220
• Function: LDO
• Number Of Outputs: 1
• Input Voltage Range: 6 to 2.7 V
• Output Voltage: 3 V
• Maximum Output Current: 0.8(Min) A
• Output Type: Fixed
• Accuracy: ±0.5 %
• Typical Dropout Voltage @ Current: 0.02@100uA|0.05@100mA|0.15@300mA|0.26@500mA|0.45@800mA V
• Operating Temperature: -40 to 125 °C
• Polarity: Positive
• Regulator Topology: Positive Fixed
• Voltage - Output: 3V
• Voltage - Input: Up to 6V
• Voltage - Dropout (typical): 1.2V @ 800mA
• Number Of Regulators: 1
• Current - Output: 800mA (Min)
• Mounting Type: Through Hole
• Package / Case: TO-220-3
• Input Voltage Max: 6 V
• Dropout Voltage (max): 1400 mV
• Output Current: 800 mA
• Line Regulation: 0.001 %
• Load Regulation: 0 % / mA
• Voltage Regulation Accuracy: 0.5 %
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• 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: TC12643.0VAB

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 and output voltage, and
output current. The following equation is used to
calculate worst-case actual power dissipation:
EQUATION 5-1:
The
(Equation
temperature (T
perature (T
tion-to-air (θ
EQUATION 5-2:
Table 5-1
the TC1264 packages.
TABLE 5-1:
© 2006 Microchip Technology Inc.
* Tab of device attached to topside copper
2500 sq mm 2500 sq mm 2500 sq mm
1000 sq mm 2500 sq mm 2500 sq mm
1000 sq mm 1000 sq mm 1000 sq mm
1000 sq mm
225 sq mm
100 sq mm
(Topside)*
Copper
I
LOADMAX
V
Where:
Area
V
OUTMIN
INMAX
maximum
Where all terms are previously defined.
THERMAL CONSIDERATIONS
Thermal Shutdown
Power Dissipation
P
and
P
5-2) is a function of the maximum ambient
D
J
D
MAX
JA
=
= Worst-case actual power dissipation
= Maximum voltage on V
= Minimum regulator output voltage
= Maximum output (load) current
).
Table 5-2
2500 sq mm 2500 sq mm
2500 sq mm 2500 sq mm
A
(Backside)
) and the thermal resistance from junc-
(
P
MAX
V
0 sq mm
Copper
D
INMAX
THERMAL RESISTANCE
GUIDELINES FOR TC1264 IN
SOT-223 PACKAGE
Area
MAX
), the maximum allowable die tem-
allowable
= (T
show various values of θ
–
V
J
MAX
OUTMIN
1000 sq mm
θ
JA
– T
Board
Area
A
power
MAX
)I
LOADMAX
)
IN
Resistance
Thermal
dissipation
45°C/W
45°C/W
53°C/W
59°C/W
52°C/W
55°C/W
(θ
JA
JA
)
for
TABLE 5-2:
Equation 5-1
Equation 5-2
within limits. For example:
Find:
1.
2.
Actual power dissipation:
Maximum allowable power dissipation:
In this example, the TC1264 dissipates a maximum of
260 mW; below the allowable limit of 508 mW. In a
similar manner,
used to calculate maximum current and/or input
voltage limits. For example, the maximum allowable
V
power dissipation of 508mW into
which V
* Tab of device attached to topside copper
Given:
2500 sq mm 2500 sq mm 2500 sq mm
1000 sq mm 2500 sq mm 2500 sq mm
IN
125 sq mm
(Topside)*
Copper
, is found by substituting the maximum allowable
Area
Actual power dissipation.
Maximum allowable dissipation
I
LOADMAX
V
P
P
V
IN
OUTMIN
P
T
T
D
D
INMAX
D
MAX
AMAX
JMAX
≈
=
=
θ
JA
(
= 4.6V.
to ensure regulator thermal operation is
260 mW
(
V
P
P
P
2500 sq mm 2500 sq mm
3.3 1.1
can be used in conjunction with
(Backside)
INMAX
DMAX
DMAX
DMAX
Equation 5-1
Copper
= 3.3V ± 10%
= 2.7V ± 0.5%
= 275 mA
= 125°C
= 95°C
= 59°C/W (SOT-223)
THERMAL RESISTANCE
GUIDELINES FOR TC1264 IN
3-PIN DDPAK/TO-220
PACKAGE
×
Area
–
=
=
=
)
V
–
508 mW
T
-------------------------------------- -
(
-------------------------
OUTMIN
125 95
(
JMAX
2.7 .995
59
–
and
×
θ
Board
–
JA
Area
)I
T
)
Equation 5-2
LOADMAX
AMAX
TC1264
Equation
)
275 10
DS21375C-page 7
×
Resistance
Thermal
25°C/W
27°C/W
35°C/W
5-1, from
3 –
(θ
JA
can be
)