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參數(shù)資料
| 型號： | TPS72501D |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | LOW INPUT VOLTAGE, 1-A LOW-DROPOUT LINEAR REGULATORS WITH SUPERVISOR |
| 中文描述： | 低輸入電壓，1低壓差線性穩(wěn)壓器與督導(dǎo)員 |
| 文件頁數(shù)： | 13/22頁 |
| 文件大?。?/td> | 698K |
| 代理商： | TPS72501D |
www.ti.com
TJ
°
1
0.1
2
3
4
5
1
10
100
PD
Copper Heatsink Area cm
2
T
A
= 55
°
C
No Air Flow
150 LFM
250 LFM
SOT223 Power Dissipation
The SOT223 package provides an effective means of managing power dissipation in surface mount applications.
The SOT223 package dimensions are provided in the
Mechanical Data
section at the end of the data sheet. The
addition of a copper plane directly underneath the SOT223 package enhances the thermal performance of the
package.
P
D
max
(3.3
2.5) V x 1 A
800 mW
(9)
R
θ
JAmax
From Figure 24, R
Θ
JA
vs PCB Copper Area, the ground plane needs to be 0.55 in
2
for the part to dissipate 800
mW. The operating environment used to construct Figure 24 consisted of a board with 1 oz. copper planes. The
package is soldered to a 1 oz. copper pad on the top of the board. The pad is tied through thermal vias to the 1
oz. ground plane.
(125
55)
°
C 800 mW
87.5
°
C W
(10)
TPS72501
TPS72515, TPS72516
TPS72518, TPS72525
SLVS341D–MAY 2002–REVISED MARCH 2004
THERMAL INFORMATION (continued)
From the data in Figure 23 and rearranging Equation 6, the maximum power dissipation for a different ground
plane area and a specific ambient temperature can be computed.
Figure 23. Maximum Power Dissipation vs Copper Heatsink Area
To illustrate, the TPS72525 in a SOT223 package was chosen. For this example, the average input voltage is
3.3 V, the output voltage is 2.5 V, the average output current is 1 A, the ambient temperature 55
°
C, no air flow is
present, and the operating environment is the same as documented below. Neglecting the quiescent current, the
maximum average power is:
Substituting T
J
max for T
J
into Equation 6 gives Equation 10:
13
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS72501DCQ | 功能描述:低壓差穩(wěn)壓器 - LDO Low Input Voltage Any Cap 1-A 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(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS72501DCQ | 制造商:Texas Instruments 功能描述:V REG LDO SMD 72501 SOT-223-6 |
| TPS72501DCQG4 | 功能描述:低壓差穩(wěn)壓器 - LDO Low Input Voltage Any Cap 1-A 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(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS72501DCQR | 功能描述:低壓差穩(wěn)壓器 - LDO Low Input Voltage Any Cap 1-A 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(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| TPS72501DCQR | 制造商:Texas Instruments 功能描述:IC 制造商:Texas Instruments 功能描述:IC, ADJ LDO REG, 1.22V TO 5.5V, SOT223-6 |
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