SC1566IM-2.5TR Semtech, SC1566IM-2.5TR Datasheet - Page 8

• Manufacturer Part Number: SC1566IM-2.5TR
• Manufacturer: Semtech

Specifications of SC1566IM-2.5TR

• Voltage Regulator Type: Linear
• Topology: LDO
• Regulator Output Type: Adjustable/Fixed
• Polarity Type: Positive
• Number Of Outputs: Single
• Input Voltage (min): 2.2V
• Input Voltage (max): 5.5V
• Output Voltage: 1.2 to 4.8/2.5V
• Package Type: TO-263
• Output Current: 3A
• Load Regulation: 0.2%
• Line Regulation: 0.035%
• Output Voltage Accuracy: ±1%
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Dropout Voltage@current (max): 0.005@10mA/0.1@500mA
• Dropout Voltage@current (typ): 0.001@10mA
• Pin Count: 3 +Tab
• Mounting: Surface Mount
• Quiescent Current (max): 1.75mA
• Lead Free Status / Rohs Status: Not Compliant

Using this figure, and assuming T
calculate the maximum thermal impedance allowable to
maintain T
R
R
POWER MANAGEMENT
Applications Information (Cont.)
therefore
0.001
Co=2.2uF, Stable Region:
TH
TH
2005 Semtech Corp.
J (
J (
A
C
)(
)(
MAX
MAX
Unstable Region:
R
)
0.01
)
J
TH
(
3
S
150°C (see page 7):
T
A
ESR(Ohms)
( J
C
)(
MAX
MAX
/
P
W
0.1
)
D
)
(
MAX
and
T
33
A
)
(
MAX
R
C
TH
)
/
(
1
C
W
S
)
150
0.001
Co=220uF, Stable Region:
. 1
0
A(MAX)
81
C
10
85
3mA
30mA
300mA
3A
/
W
Figure 1. Phase-margin Contour Plot
= 85°C, we can
Unstable Region:
0.01
,
36
Load
ESR(Ohms)
C
/
W
0.1
8
This should be achievable for the TO-263 package using
pcb copper area to aid in conducting the heat away from
the device, such as a large (~2 squ. inch) pad connected
to the tab of the device. Internal ground/power planes
and air flow will also assist in removing heat. For higher
power dissipations it may be necessary to use a small
heatsink and the TO-220 package.
1
0.001
Co=22uF, Stable Region:
Unstable Region:
10
3mA
30mA
300mA
3A
0.01
Load
ESR(Ohms)
0.1
1
10
3mA
30mA
300mA
3A
SC1566
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Load