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FAN1582D-1.5 데이터시트 PDF




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부품번호 FAN1582D-1.5 기능
기능 3A Adjustable/Fixed Ultra Low Dropout Linear Regulator
제조업체 Fairchild Semiconductor
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FAN1582D-1.5 데이터시트, 핀배열, 회로
www.fairchildsemi.com
FAN1582
3A Adjustable/Fixed Ultra Low Dropout
Linear Regulator
Features
• Ultra Low dropout voltage, 0.4V typical at 3A
• Remote sense operation
• Fast transient response
• Load regulation: 0.05% typical
• 0.5% initial accuracy
• On-chip thermal limiting
• 5-Pin SPAK, TO-252 DPAK, and TO-263 packages
Applications
• Pentium® Processors
• PowerPC, AMD K5 and K6 processors
• Pentium support of GTL+ bus supply
• Low voltage logic supply
• Embedded Processor supplies
• Split plane regulator
• New 2.5V and 1.8V Logic Families
Description
The FAN1582, FAN1582-1.5, and FAN1582-2.5 are ultra-low
dropout regulators with 3A output current capability. These
devices have been optimized for low voltage applications
including VTT bus termination, where transient response and
minimum input voltage are critical. The FAN1582 is ideal
for low voltage microprocessor applications requiring a reg-
ulated output from 1.3V to 5.7V with a power input supply
of 1.75V to 6.5V. The FAN1582-1.5 offers fixed 1.5V with
3A current capabilities for GTL+ bus VTT termination. The
FAN1582-2.5 offers fixed 2.5V with 3A current capability
for logic IC operation and processors while minimizing the
overall power dissipation.
Current limit ensures controlled short-circuit current. On-chip
thermal limiting provides protection against any combination
of overload and ambient temperature that would create exces-
sive junction temperatures.
The FAN1582 series regulators are available in the 5-Pin
SPAK, TO-252 DPAK, and TO-263 power packages.
Typical Applications
VIN = 3.3V
10µF
+
VCNTL = 5V
VIN VSENSE
FAN1582
VCNTL
VOUT
Adj
VIN = 3.3V
10µF
+
124
2.1V at 3A
+
22µF
86.6
VCNTL = 5V
1µF
+
VIN = 5.75V
10µF
+
VCNTL = 12V
VIN VSENSE
FAN1582–2.5
VCNTL
VOUT
GND
VIN VSENSE
FAN1582
VCNTL
VOUT
Adj
2.5V at 3A
+
22µF
124
5V at 3A
+
22µF
374
Pentium is a registered trademark of Intel Corporation. PowerPC is a trademark of IBM Corporation.
REV. 1.1.2 2/26/03




FAN1582D-1.5 pdf, 반도체, 판매, 대치품
FAN1582
PRODUCT SPECIFICATION
Typical Perfomance Characteristics
1.0
0.10
∆Ι=3A
0.9 0.05
0.8
0.7
0.6
0.5 T=0°C
0
-0.05
0.4 T=25°C
0.3
T=125°C
-0.10
0.2 -0.15
0.1
0.0 -0.20
0 0.5 1 1.5 2 2.5 3
-75 -50 -25 0 25 50 75 100 125 150 175
OUTPUT CURRENT (A)
JUNCTION TEMPERATURE (°C)
Dropout Voltage vs. Output Current
Load Regulation vs. Temperature
1.275
1.270
1.265
1.260
1.255
1.250
1.245
1.240
1.235
1.230
1.225
-75 -50 -25 0 25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Reference Voltage vs. Temperature
3.70
3.65
3.60
VOUT set with
1% resistors
3.55
3.50
3.45
3.40
3.35
3.30
3.25
VOUT = 3.3V1
Note:
1. FAN1582 Only
3.20
-75 -50 -25 0 25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Output Voltage vs. Temperature
10
8
6
4
2
0
-75 -50 -25 0 25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Mimimum Load Current vs. Temperature
100
90
80
70
60
50
40
30
20
10
0
-75 -50
Note:
1. FAN1582 Only
-25 0 25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Adjust Pin Current vs. Temperature
4 REV. 1.1.2 2/26/03

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FAN1582D-1.5 전자부품, 판매, 대치품
PRODUCT SPECIFICATION
FAN1582
istics section provides a separate thermal resistance and
maximum junction temperature for both the control circuitry
and the power transistor. Calculate the maximum junction
temperature for both sections to ensure that both thermal
limits are met.
For example, look at using an FAN1582M-1.5 to generate
3A @ 1.5V ± 2% from a 3.3V source (3.2V to 3.6V).
Assumptions:
• Vin = 3.6V worst case
• VOUT = 1.47V worst case
• IOUT = 3A continuous
• TA = 70°C
Θ Case-to-Ambient = 5°C/W (assuming both a heatsink and a
thermally conductive material)
The power dissipation in this application is:
PD = (VIN - VOUT) * (IOUT) = (3.6-1.47) * (3) = 6.39W
From the specification table,
TJ = TA + (PD) * (Θ Case-to-Ambient + ΘJC)
= 70 + (6.39) * (5 + 3) = 121°C
The junction temperature is below the maximum rating.
Junction-to-case thermal resistance is specified from the IC
junction to the bottom of the case directly below the die. This
is the lowest resistance path for heat flow. Proper mounting
ensures the best thermal flow from this area of the package to
the heat sink. Use of a thermally conductive material at the
case-to-heat sink interface is recommended. Use a thermally
conductive spacer if the case of the device must be electri-
cally isolated and include its contribution to the total thermal
resistance.
VIN = 3.3V
10µF
VCNTL = 5V
U1
+
C1
1µF
C4
VIN VSENSE
FAN1582
VCNTL
VOUT
Adj
R1
10µF
C3
R2
124
86.6
2.1V at 3A
+
100µF
C2
Figure 3. Application Circuit (FAN1582)
Table 1. Bill of Materials for Application Circuit for the FAN1582
Item
C1, C3
C2
C4
R1
R2
U1
Quantity
2
1
1
1
1
1
Manufacturer
Xicon
Xicon
Any
Generic
Generic
Fairchild
Part Number
L10V10
L10V100
FAN1582P
Description
10µF, 10V Aluminum
100µF, 10V Aluminum
1µF Ceramic
124, 1%
86.6, 1%
3A Regulator
REV. 1.1.2 2/26/03
7

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부품번호상세설명 및 기능제조사
FAN1582D-1.5

3A Adjustable/Fixed Ultra Low Dropout Linear Regulator

Fairchild Semiconductor
Fairchild Semiconductor

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