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參數資料
| 型號： | FAN1582PX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 3A Adjustable/Fixed Ultra Low Dropout Linear Regulator |
| 中文描述： | 1.25 V-5.7 V ADJUSTABLE POSITIVE LDO REGULATOR, 0.6 V DROPOUT, PSSO5 |
| 封裝： | PLASTIC, SPAK-5 |
| 文件頁數： | 7/12頁 |
| 文件大小： | 393K |
| 代理商： | FAN1582PX |
PRODUCT SPECIFICATION
FAN1582
REV. 1.1.2 2/26/03
7
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:
V
in
= 3.6V worst case
V
OUT
= 1.47V worst case
I
OUT
= 3A continuous
T
A
= 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:
P
D
= (V
IN
- V
OUT
) * (I
OUT
) = (3.6-1.47) * (3) = 6.39W
From the specification table,
T
J
= T
A
+ (P
D
) * (
Θ
Case-to-Ambient +
Θ
JC
)
= 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.
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
Description
10μF, 10V Aluminum
100μF, 10V Aluminum
1μF Ceramic
124
, 1%
86.6
, 1%
3A Regulator
FAN1582P
100
μ
F
C2
10
μ
F
C3
V
CNTL
= 5V
2.1V at 3A
V
IN
= 3.3V
+
10
μ
F
C1
1
μ
F
C4
+
V
IN
V
SENSE
V
CNTL
Adj
V
OUT
FAN1582
86.6
124
R2
R1
U1
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相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN1582T | 功能描述:低壓差穩壓器 - LDO DISC BY MFG 2/02 RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| FAN1582T-1.5 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Positive Fixed Voltage Regulator |
| FAN1582T15 | 功能描述:低壓差穩壓器 - LDO DISC BY MFG 2/02 RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| FAN1582T-2.5 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Positive Fixed Voltage Regulator |
| FAN1582T25 | 功能描述:低壓差穩壓器 - LDO DISC BY MFG 2/02 RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節:0.3 % 輸出端數量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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