TC1263-3.3VETTR Microchip Technology, TC1263-3.3VETTR Datasheet - Page 8

• Manufacturer Part Number: TC1263-3.3VETTR
• Description: IC CMOS LDO 3.3V 500MA DDPAK-5
• Manufacturer: Microchip Technology

Specifications of TC1263-3.3VETTR

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 6V
• Voltage - Dropout (typical): 0.35V @ 500mA
• Number Of Regulators: 1
• Current - Output: 500mA (Min)
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TO-263-5, D²Pak (5 leads + Tab), TO-263BA
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 6 V
• Output Voltage: 3.3 V
• Output Type: Fixed
• Dropout Voltage (max): 650 mV
• Output Current: 500 mA
• Line Regulation: 0.05 %
• Load Regulation: 0.002 % / mA
• 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: Lead free / RoHS Compliant
• Other names: TC12633.3VETTR

TC1263
5.0
5.1
Integrated thermal protection circuitry shuts the
regulator off when the 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 out-
put current. The following equation is used to calculate
worst-case actual power dissipation:
EQUATION 5-1:
The
(Equation 5-2) is a function of the maximum ambient
temperature (T
temperature (T
junction-to-air (
EQUATION 5-2:
Table 5-1 and Table 5-2 show various values of
the TC1263 package types.
TABLE 5-1:
DS21374C-page 8
* Pin 2 is ground. Device is mounted on top-side.
2500 sq mm 2500 sq mm 2500 sq mm
1000 sq mm 2500 sq mm 2500 sq mm
225 sq mm
100 sq mm
(Topside)*
I
I
Copper
LOADMAX
LOADMAX
V
V
Where:
Where:
Area
V
V
OUTMIN
OUTMIN
INMAX
INMAX
maximum
P
THERMAL CONSIDERATIONS
Thermal Shutdown
Power Dissipation
P
P
D
D
D
=
= Worst-case actual power dissipation
= Worst-case actual power dissipation
= Maximum voltage on V
= Minimum regulator output voltage
= Maximum output (load) current
= Maximum voltage on V
= Minimum regulator output voltage
= Maximum output (load) current
P
2500 sq mm 2500 sq mm
2500 sq mm 2500 sq mm
(Backside)
JMAX
AMAX
V
DMAX
JA
Copper
INMAX
THERMAL RESISTANCE
GUIDELINES FOR TC1263 IN
8-PIN SOIC PACKAGE
Area
).
) and the thermal resistance from
allowable
), the maximum allowable die
=
–
T
-------------------------------------- -
V
JMAX
OUTMIN
Board
–
JA
Area
T
power
AMAX
I
LOADMAX
IN
IN
Resistance
Thermal
dissipation
60°C/W
60°C/W
68°C/W
74°C/W
JA
JA
)
for
TABLE 5-2:
Equation 5-1 can be used in conjunction with
Equation 5-2 to ensure regulator thermal operation is
within limits. For example:
Find:
1.
2.
Actual power dissipation:
Maximum allowable power dissipation:
In this example, the TC1263 dissipates a maximum of
260 mW below the allowable limit of 500 mW. In a
similar manner, Equation 5-1 and Equation 5-2 can be
used to calculate maximum current and/or input
voltage limits. For example, the maximum allowable
V
power dissipation of 500 mW into Equation 5-1, from
which V
* Tab of device attached to top-side 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
OUTMIN
P
INMAX
T
T
D
D
INMAX
D
AMAX
JMAX
=
=
JA
260 mW
V
= 4.6V.
P
P
P
2500 sq mm 2500 sq mm
3.3 1.1
(Backside)
INMAX
DMAX
DMAX
DMAX
Copper
THERMAL RESISTANCE
GUIDELINES FOR TC1263 IN
5-PIN DDPAK/TO-220
PACKAGE
Area
=
=
=
=
=
=
–
=
=
=
V
© 2005 Microchip Technology Inc.
–
T
-------------------------------------- -
-------------------------
500 mW
OUTMIN
3.3V ± 10%
2.7V ± 0.5%
275 mA
125°C
95°C
60° C/W (SOIC)
125 95
JMAX
2.7 .995
60
–
Board
–
JA
Area
T
I
LOADMAX
AMAX
275 10
Resistance
Thermal
25°C/W
27°C/W
35°C/W
3 –
JA
)