TC1265-3.3VOA Microchip Technology, TC1265-3.3VOA Datasheet - Page 8

• Manufacturer Part Number: TC1265-3.3VOA
• Description: LDO Regulator Pos 3.3V 0.8A 8-Pin SOIC N
• Manufacturer: Microchip Technology
• Type: Linearr

Specifications of TC1265-3.3VOA

• Package: 8SOIC N
• Function: LDO
• Number Of Outputs: 1
• Input Voltage Range: 6 to 2.7 V
• Output Voltage: 3.3 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: 3.3V
• Voltage - Input: Up to 6V
• Voltage - Dropout (typical): 1.2V @ 800mA
• Number Of Regulators: 1
• Current - Output: 800mA (Min)
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Input Voltage Max: 6 V
• Dropout Voltage (max): 1400 mV
• Output Current: 800 mA
• Line Regulation: 0.001 %
• 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: TC126533VOA

TC1265
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
EQUATION 5-2:
Table 5-1
the TC1265 package types.
TABLE 5-1:
DS21376D-page 8
* Pin 2 is ground. Device is mounted on the top-side.
2500 sq mm
1000 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
and
D
5-2) is a function of the maximum ambient
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
Table 5-2
P
2500 sq mm
2500 sq mm
2500 sq mm
2500 sq mm
(
JMAX
(Backside)
AMAX
DMAX
V
JA
Copper
INMAX
THERMAL RESISTANCE
GUIDELINES FOR TC1265 IN
8-PIN SOIC PACKAGE
).
Area
) and the thermal resistance from
allowable
), the maximum allowable die
=
–
show various values of θ
T
-------------------------------------- -
V
JMAX
OUTMIN
2500 sq mm
2500 sq mm
2500 sq mm
2500 sq mm
θ
Board
–
JA
Area
T
power
)I
AMAX
LOADMAX
IN
IN
Resistance
dissipation
Thermal
60°C/W
60°C/W
68°C/W
74°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 TC1265 dissipates a maximum of
260 mW, below the allowable limit of 500 mW. In a
similar manner,
used to calculate maximum current and/or input
voltage limits. For example, the maximum allowable
V
power dissipation of 500 mW into
which V
* Tab of device attached to top-side copper
Given:
2500
1000
IN
(Topside)*
125
Copper
is found by substituting the maximum allowable
Area
Actual power dissipation
Maximum allowable dissipation
I
sq mm
LOADMAX
sq mm
sq mm
V
P
P
V
OUTMIN
P
INMAX
T
T
D
D
INMAX
D
AMAX
JMAX
≈
=
=
θ
JA
(
to ensure regulator thermal operation is
(
260 mW
V
= 4.6V.
P
P
P
3.3 1.1
2500
2500
2500
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
= 60°C/W (SOIC)
THERMAL RESISTANCE
GUIDELINES FOR TC1265 IN
5-PIN DDPAK/TO-220
PACKAGE
Area
×
sq mm
sq mm
sq mm
–
=
=
=
)
V
© 2006 Microchip Technology Inc.
–
T
-------------------------------------- -
(
-------------------------
500 mW
OUTMIN
125 95
(
JMAX
2.7 .995
60
2500
2500
2500
–
and
×
θ
Board
–
JA
Area
)I
T
)
sq mm
sq mm
sq mm
Equation 5-2
LOADMAX
AMAX
Equation
)
275 10
×
Resistance
Thermal
25°C/W
27°C/W
35°C/W
5-1, from
3 –
(θ
JA
can be
)